Mechanical_StandardGuidelines Specs References

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USC Mechanical Standard Guideline 1 Revised August 2011 DIVISION 23 – HEATING, VENTILATING, AND AIR-CONDITIONING (HVAC) TABLE OF CONTENTS 23 01 00 GENERAL REQUIREMENTS 23 01 00 Operation and Maintenance of HVAC Systems 1. Operation and Maintenance of Facility Fuel Systems 2. Operation and Maintenance of HVAC Piping and Pumps 3. Operation and Maintenance of HVAC Air Distribution 4. Operation and Maintenance of Central Heating Equipment 5. Operation and Maintenance of Central Cooling Equipment 6. Operation and Maintenance of Central HVAC Equipment 7. Operation and Maintenance of Decentralized HVAC Equipment 8. Diagnostic Systems for HVAC 23 05 00 Common Work Results for HVAC 1. Common Motor Requirements for HVAC Equipment 2. Expansion Fittings and Loops for HVAC Piping 3. Meters and Gages for HVAC Piping 4. General-Duty Valves for HVAC Piping 5. Hangers and Supports for HVAC Piping and Equipment 6. Heat Tracing for HVAC Piping 7. Vibration and Seismic Controls for HVAC Piping and Equipment 8. Identification for HVAC Piping and Equipment 9. Anti-Microbial Coatings for HVAC Ducts and Equipment 10. Anti-Microbial Ultraviolet Emitters for HVAC Ducts and Equipment 11. Testing, Adjusting, and Balancing for HVAC 23 06 00 Schedules for HVAC 1. Schedules for Facility Fuel Service Systems 2. Schedules for HVAC Piping and Pumps 3. Schedules for HVAC Air Distribution 4. Schedules for Central Heating Equipment 5. Schedules for Central Cooling Equipment 6. Schedules for Central HVAC Equipment 7. Schedules for Decentralized HVAC Equipment 23 07 00 HVAC Insulation 1. Duct Insulation 2. HVAC Equipment Insulation 3. HVAC Piping Insulation 23 08 00 Commissioning of HVAC ** GUIDELINES CAPTURED UNDER DIFFERENT COVER WITHIN THE OVERALL GUIDELINES** 23 09 00 Instrumentation and Control for HVAC 1. Instrumentation and Control Devices for HVAC 2. Direct-Digital Control System for HVAC 3. Electric and Electronic Control System for HVAC

Transcript of Mechanical_StandardGuidelines Specs References

Page 1: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 1 Revised August 2011

DIVISION 23 – HEATING, VENTILATING, AND AIR-CONDITIONING (HVAC) TABLE OF CONTENTS

23 01 00 GENERAL REQUIREMENTS 23 01 00 Operation and Maintenance of HVAC Systems

1. Operation and Maintenance of Facility Fuel Systems 2. Operation and Maintenance of HVAC Piping and Pumps 3. Operation and Maintenance of HVAC Air Distribution 4. Operation and Maintenance of Central Heating Equipment 5. Operation and Maintenance of Central Cooling Equipment 6. Operation and Maintenance of Central HVAC Equipment 7. Operation and Maintenance of Decentralized HVAC Equipment 8. Diagnostic Systems for HVAC

23 05 00 Common Work Results for HVAC

1. Common Motor Requirements for HVAC Equipment 2. Expansion Fittings and Loops for HVAC Piping 3. Meters and Gages for HVAC Piping 4. General-Duty Valves for HVAC Piping 5. Hangers and Supports for HVAC Piping and Equipment 6. Heat Tracing for HVAC Piping 7. Vibration and Seismic Controls for HVAC Piping and Equipment 8. Identification for HVAC Piping and Equipment 9. Anti-Microbial Coatings for HVAC Ducts and Equipment 10. Anti-Microbial Ultraviolet Emitters for HVAC Ducts and Equipment 11. Testing, Adjusting, and Balancing for HVAC

23 06 00 Schedules for HVAC 1. Schedules for Facility Fuel Service Systems 2. Schedules for HVAC Piping and Pumps 3. Schedules for HVAC Air Distribution 4. Schedules for Central Heating Equipment 5. Schedules for Central Cooling Equipment 6. Schedules for Central HVAC Equipment 7. Schedules for Decentralized HVAC Equipment

23 07 00 HVAC Insulation

1. Duct Insulation 2. HVAC Equipment Insulation 3. HVAC Piping Insulation

23 08 00 Commissioning of HVAC ** GUIDELINES CAPTURED UNDER DIFFERENT COVER WITHIN THE OVERALL GUIDELINES** 23 09 00 Instrumentation and Control for HVAC

1. Instrumentation and Control Devices for HVAC 2. Direct-Digital Control System for HVAC 3. Electric and Electronic Control System for HVAC

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USC Mechanical Standard Guideline 2 Revised August 2011

4. Pneumatic Control System for HVAC 5. Pneumatic and Electric Control System for HVAC 6. Sequence of Operations for HVAC Controls

23 10 00 FACILITY FUEL SYSTEMS

23 11 00 Facility Fuel Piping

1. Facility Fuel-Oil Piping 2. Facility Gasoline Piping 3. Facility Natural-Gas Piping 4. Facility Liquefied-Petroleum Gas Piping:

23 12 00 Facility Fuel Pumps 1. Facility Fuel-Oil Pumps 2. Facility Gasoline Dispensing Pumps

23 13 00 Facility Fuel-Storage Tanks 1. Facility Underground Fuel-Oil, Storage Tanks 2. Facility Aboveground Fuel-Oil, Storage Tanks

23 20 00 HVAC PIPING AND PUMPS 23 21 00 Hydronic Piping and Pumps

1. Hydronic Piping 2. Hydronic Pumps 3. Automatic Condensate Pump Units

23 22 00 Steam and Condensate Piping and Pumps

1. Steam and Condensate Heating Piping 2. Steam Condensate Pumps

23 23 00 Refrigerant Piping

1. Refrigerant Piping Valves 2. Refrigerant Piping Specialties 3. Refrigerant Safety Relief Valve Discharge Piping 4. Refrigerants

23 24 00 Internal-Combustion Engine Piping

1. Internal-Combustion Engine Remote-Radiator Coolant Piping\ 2. Internal-Combustion Engine Exhaust Piping

23 25 00 HVAC Water Treatment

1. Water Treatment for Closed-Loop Hydronic Systems 2. Water Treatment for Open Hydronic Systems 3. Water Treatment for Steam System Feedwater 4. Water Treatment for Humidification Steam System Feedwater

23 30 00 HVAC AIR DISTRIBUTION

23 31 00 HVAC Ducts and Casings 1. Metal Ducts

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USC Mechanical Standard Guideline 3 Revised August 2011

2. Nonmetal Ducts: 3. HVAC Casings

23 32 00 Air Plenums and Chases

1. Fabricated, Metal Air Plenums 2. Air-Distribution Ceiling Plenums 3. Air-Distribution Floor Plenums 4. Air-Distribution Wall Plenums 5. Air-Distribution Chases Formed by General Construction 6. Acoustical Air Plenums

23 33 00 Air Duct Accessories

1. Dampers 2. Duct Silencers: 3. Turning Vanes 4. Duct-Mounting Access Doors 5. Flexible Connectors 6. Flexible Ducts 7. Duct Liners

23 34 00 HVAC Fans

1. Axial HVAC Fans 2. Centrifugal HVAC Fans 3. HVAC Power Ventilators 4. Air Curtains

23 35 00 Special Exhaust Systems 1. Sawdust Collection Systems 2. Engine Exhaust Systems

23 36 00 Air Terminal Units 1. Constant-Air-Volume Units 2. Variable-Air-Volume Units

23 37 00 Air Outlets and Inlets

1. Diffusers, Registers, and Grilles 2. Fabric Air Distribution Devices 3. HVAC Gravity Ventilators

23 38 00 Ventilation Hoods

4. Commercial-Kitchen Hoods 5. Fume Hoods

23 40 00 HVAC AIR CLEANING DEVICES 23 41 00 Particulate Air Filtration

1. Panel Air Filters 2. Renewable-Media Air Filters 3. Washable Air Filters 4. Extended Surface Filters

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USC Mechanical Standard Guideline 4 Revised August 2011

5. High-Efficiency Particulate Filtration: 6. Ultra-Low Penetration Filtration 7. Super Ultra-Low Penetration Filtration

23 42 00 Gas-Phase Air Filtration 1. Activated-Carbon Air Filtration 2. Chemically-Impregnated Adsorption Air Filtration 3. Catalytic-Adsorption Air Filtration

23 43 00 Electronic Air Cleaners

1. Washable Electronic Air Cleaners 2. Agglomerator Electronic Air Cleaners 3. Self-Contained Electronic Air Cleaners

23 50 00 CENTRAL HEATING EQUIPMENT 23 51 00 Breechings, Chimneys, and Stacks

1. Draft Control Devices 2. Fabricated Breechings and Accessories 3. Fabricated Stacks 4. Gas Vents 5. Insulated Sectional Chimneys 6. Flue-Gas Filtration Equipment

23 52 00 Heating Boilers 1. Electric Boilers 2. Condensing Boilers 3. Pulse Combustion Boilers 4. Cast-Iron Boilers 5. Water-Tube Boilers 6. Fire-Tube Boilers

23 53 00 Heating Boiler Feedwater Equipment

1. Boiler Feedwater Pumps 2. Deaerators

23 54 00 Furnaces

1. Electric -Resistance Furnaces 2. Fuel-Fired Furnaces

23 55 00 Fuel-Fired Heaters 1. Fuel-Fired Duct Heaters 2. Gas-Fired Radiant Heaters: 3. Fuel-Fired Unit Heaters

23 56 00 Solar Energy Heating Equipment

1. Heating Solar Collectors 2. Heating Solar Vacuum-Tube Collectors 3. Packaged Solar Heating Equipment

23 57 00 Heat Exchangers for HVAC

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USC Mechanical Standard Guideline 5 Revised August 2011

1. Steam-to-Steam Heat Exchangers 2. Steam-to-Water Heat Exchangers 3. Liquid-to-Liquid Heat Exchangers 4. Direct Geoexchange Heat Exchangers

23 60 00 CENTRAL COOLING EQUIPMENT 23 61 00 Refrigerant Compressors

1. Centrifugal Refrigerant Compressors 2. Reciprocating Refrigerant Compressors 3. Scroll Refrigerant Compressors 4. Rotary-Screw Refrigerant Compressors

23 62 00 Packaged Compressor and Condenser Units

1. Packaged Air-Cooled Refrigerant Compressor and Condenser Units 2. Packaged Water-Cooled Refrigerant Compressor and Condenser Units

23 63 00 Refrigerant Condensers 1. Air-Cooled Refrigerant Condensers 2. Water-Cooled Refrigerant Condensers: 3. Evaporative Refrigerant Condensers

23 64 00 Packaged Water Chillers

1. Absorption Water Chillers 2. Centrifugal Water Chillers 3. Reciprocating Water Chillers: 4. Scroll Water Chillers 5. Rotary-Screw Water Chillers:

23 65 00 Cooling Towers 1. Forced-Draft Cooling Towers 2. Natural-Draft Cooling Towers 3. Field-Erected Cooling Towers 4. Liquid Coolers

23 70 00 CENTRAL HVAC EQUIPMENT

23 71 00 Thermal Storage 1. Thermal Heat Storage: 2. Chilled-Water Thermal Storage 3. Ice Storage:

23 72 00 Air-to-Air Energy Recovery Equipment 1. Heat-Wheel Air-to-Air Energy-Recovery Equipment 2. Heat-Pipe Air-to-Air Energy-Recovery Equipment: 3. Fixed-Plate Air-to-Air Energy-Recovery Equipment 4. Packaged Air-to-Air Energy-Recovery Units:

23 73 00 Indoor Central-Station Air-Handling Units 1. Modular Indoor Central-Station Air-Handling Units 2. Custom Indoor Central-Station Air-Handling Units 3. Indoor Indirect Fuel-Fired Heating and Ventilating Units

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USC Mechanical Standard Guideline 6 Revised August 2011

4. Indoor, Direct Gas-Fired Heating and Ventilating Units

23 74 00 Packaged Outdoor HVAC Equipment 1. Packaged, Outdoor, Central-Station Air-Handling Units 2. Packaged, Outdoor, Heating-Only Makeup-Air Units 3. Packaged, Outdoor, Heating and Cooling Makeup Air-Conditioners

23 75 00 Custom-Packaged Outdoor HVAC Equipment 1. Custom-Packaged, Outdoor, Central-Station Air-Handling Units 2. Custom-Packaged, Outdoor, Heating and Ventilating Makeup-Air Units 3. Custom-Packaged, Outdoor, Heating and Cooling Makeup Air-Conditioners

23 76 00 Evaporative Air-Cooling Equipment

1. Direct Evaporative Air Coolers 2. Indirect Evaporative Air Coolers 3. Combined Direct and Indirect Evaporative Air Coolers

23 80 00 DECENTRALIZED HVAC EQUIPMENT

23 81 00 Decentralized Unitary HVAC Equipment 1. Packaged Terminal Air-Conditioners 2. Room Air-Conditioners 3. Self-Contained Air-Conditioners 4. Computer-Room Air-Conditioners: 5. Split-System Air-Conditioners 6. Air-Source Unitary Heat Pumps 7. Water-Source Unitary Heat Pumps

23 82 00 Convection Heating and Cooling Units 1. Valance Heating and Cooling Units 2. Air Coils 3. Fan Coil Units 4. Unit Ventilators 5. Induction Units 6. Radiators: 7. Convectors 8. Finned-Tube Radiation Heaters 9. Unit Heaters

23 83 00 Radiant Heating Units 1. Radiant-Heating Electric Cables: 2. Radiant-Heating Hydronic Piping: 3. Radiant-Heating Electric Panels 4. Electric Radiant Heaters

23 84 00 Humidity Control Equipment

1. Humidifiers 2. Dehumidifiers 3. Indoor Pool and Ice-Rink Dehumidification Unit

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USC Mechanical Standard Guideline 7 Revised August 2011

23 90 00 Unassigned DIVISION 23 – HEATING, VENTILATING, AND AIR-CONDITIONING (HVAC) 23 00 00 GENERA; REQUIREMENTS This guideline is intended to represent the acceptable design and construction standards, as it relates to Mechanical equipment and systems. If any portions of this guideline are found to conflict with one another, formal clarification shall be requested by USC FMS. While request is under consideration, it is to be assumed that the stricter requirement / standard of care should apply. This guideline is not to be considered as a means or implied approval to violate local and state general building or trade codes. Any updates to applicable codes (or appropriate industry standards) not reflected, or somehow violated in the current version of this guideline, shall be brought to the attention of USC FMS for clarification and subsequent corrections to the language presented here within.

1. DEFINITIONS

FMS Facilities Management Services TAB Test and Air Balance Company ASHRAE American Society of Heating, Refrigeration, and Air Conditioning Engineers AABC Associated Air Balance Council SMACNA Sheet Metal and Air Conditioning Contractors National Association NEBB National Environmental Balancing Bureau AMCA Air Management and Control Association ARI Air Conditioning and Refrigeration Institute ABMA American Bearing Manufacturers Association NFPA National Fire Protection Association ADA Americans with Disabilities Act AFD Automatic Fire Damper AFI Air Filter Institute AGA American Gas Association ANSI American National Standards Institute ASME American Society of Mechanical Engineers ASTM American Society of Testing Materials AWS American Welding Society OSHA Occupational Safety and Health Administration HVAC Heating, Ventilating, and Air Conditioning

2. Building System Requirements

2.1. Utilities

a. Any building on the University Park Campus (UPC) or Health Sciences Campus (HSC) shall be connected to the University Utilities available in the area. This must be coordinated with FMS Engineering Services Department. A formal request must be made by the design team to FMS Engineering Services to see what University utilities are available in the area. The request must include an estimated building utility load for each utility.

• Chilled water

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USC Mechanical Standard Guideline 8 Revised August 2011

• Electrical • Steam • Water (Fire and Domestic use) • Reclaimed Water • All other utilities are by local municipalities.

b. These utilities are not always available, so please coordinate the building utility

requirements early.

c. Utilities not owned or operated (made available) by the University must also be coordinated with FMS.

• Sanitary Sewer • Storm Drain • Gas • Telecommunications (University operated by internal division other than FMS) • etc.

d. These utilities are not always available, so please coordinate the building utility requirements early.

e. Any connections to University utilities cannot be made without FMS Engineering Services approval.

f. Any University utility cannot be energized in the building without written approval from

FMS. 2.2. Chilled Water Systems

a. If central chilled water is not available for the new building, a water cooled chilled water

system shall be provided within the new building. Any variation from this must be approved by FMS.

b. Building loads 300 tons or larger shall be served by a water cooled centrifugal chiller. Building loads 299 tons or smaller shall be served by a water cooled screw/scroll chiller.

c. Chiller shall be manufactured by Trane or approved equal by FMS Engineering

Services.

2.3. Steam Systems

a. If central steam is not available for the new building, a central hot water boiler shall be provided within the building for space heating.

b. If central steam is not available and the building has steam requirements with the building (lab building, humidification, etc.), a steam boiler should be installed and a steam to hot water heat exchanger shall be installed for the space heating requirements.

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USC Mechanical Standard Guideline 9 Revised August 2011

c. Any variation from the above must be approved by FMS.

3. GENERAL REQUIREMENTS

a. The HVAC system shall comply with the current California Code of Regulations, Title

24, the standards of ASHRAE, SMACNA, and NFPA, as well as the requirement of the local authorities having jurisdiction.

b. All interior spaces shall be air conditioned unless specifically excluded in this Guide or in writing by the University.

c. HVAC design shall comply with Title-24 energy efficiency requirements for all

construction. Consult with utility suppliers to take full advantage of incentives for higher energy efficiency such as Savings by Design Program of Southern California Edison and The Gas Company. Indicate the required equipment energy efficiencies clearly in the equipment schedules in a separate column.

d. Assure maintenance and accessibility provisions for servicing and replacement.

e. Where practical, all equipment shall be housed on the roof of in Mechanical Rooms

within the building.

f. Provide adequate working area around equipment for service. g. Where HVAC units are roof mounted or require roof opening, verify that all structural

provisions are made to assure adequate capacity for load bearing and diaphragm capacity.

h. There must be permanent access to the roof if any equipment needing service is mounted to the roof. This access path shall allow for removal of major / large equipment components through the building so as to avoid the need for specialized rigging equipment whenever major service is required.

4. SYSTEM DESIGN CRITERIA

4.1. Calculations and Load Criteria

a. Provide design criteria and calculations as follows:

• Heating and cooling calculations shall be performed on an industry recognized

computer program such as Trace 700, HAP or Energy Pro that will demonstrate compliance with Title 24. The calculations shall be done for each room and each system.

• • Indoor and outdoor design conditions and other relevant data shall be in

accordance with current ASHRAE publications. • Provisions for internal heat gain from occupants and equipment within a

space.

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USC Mechanical Standard Guideline 10 Revised August 2011

• A field survey of actual field conditions and assessment of current demand is required for existing facility projects such as modernization and equipment replacement. Submittal of an existing condition assessment report is required.

b. When requested by the University, also submit calculations for equipment and system selection criteria such as life-cycle cost and energy analysis, duct friction and pipe friction loss calculations, fan and pump selection curves, heating and cooling coil selection data, chiller and cooling tower selection data, etc…

c. The California Energy Commission’s (CEC) Certificate of Compliance for Non-Residential Buildings with the necessary backup forms shall be completed. Title-24 Compliance calculations shall be performed on the performance basis using the whole building approach, and integrating the building envelope, mechanical and electrical systems as designed, on a CEC approved program.

4.2. Ventilation and Outside Air Control

a. Provide outside air to each room through the HVAC system in compliance with current

CEC Standards and ASHRAE recommendations.

b. Clearly indicate how outside-air is provided and how much for each HVAC unit. Also indicate with calculations how air is relieve from the building, on regular cycle and economizer cycle, to balance the fresh outside air make-up and maintain building pressures to assure compliance with CBC door closer settings for accessibility.

5. HVAC SYSTEM SELECTION

5.1. Criteria

a. HVAC systems shall be selected based on the following considerations:

• Project Characteristics that includes but not limited to the following: i. New Building vs. Renovation project ii. Construction Materials: Wood frame, concrete, steel or

masonry construction iii. Single Story vs. Multi-Story iv. Roof type: Flat vs. Pitched v. Building size and configuration vi. Single building projects vs. multiple building projects. vii. Operating schedules viii. Location on site with regard to adjacent buildings and uses.

b. Easy to install.

c. Easy to operate an maintain.

d. Energy efficient.

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USC Mechanical Standard Guideline 11 Revised August 2011

e. Proven reliability.

f. Designed upon well established principles, explicit approval shall be obtained from FMS for experimental designs before commencement.

g. Constructed of standard, use-proven materials.

h. Acceptable procurement lead time.

i. As low an initial cost as practical.

j. Low Operating cost.

k. Low Maintenance cost.

l. Lowest life cycle cost for highly energy efficient installations that incur a higher initial

cost. The life cycle cost calculations shall be performed on an industrial standard program such as Trace 700 or DOE-2. The calculations complete with all input and supporting data shall be submitted to the district for review. The life cycle cost shall consider the incremental cost of building enclosure, structure, electrical service and other utilities as well as the HVAC systems. Cost estimate shall be made in an industry-recognized format and using manufacturer’s cost data or data from a nationally recognized source such as Means. Utility costs shall be obtained from the utility providers and shall include historical cost escalation trends. Maintenance cost shall include a breakdown of labor and materials for each piece of equipment or system component based on nationally recognized references.

m. Environmentally friendly.

n. Acoustically compatible with occupied spaces.

o. Susceptibility to vandalism.

p. Degree of disruption of occupants during renovations.

q. Submit a system selection report (Design Intent Narrative) that addresses all the

considerations above, based on the guidelines of Chapter 1, HVAC System Analysis and Selection, of the 2004 ASHRAE (American Society of Heating, Refrigerating and Air Conditioning Engineers) Handbook.

23 01 00 Operation and Maintenance of HVAC Systems

1. Operation and Maintenance of Facility Fuel Systems

2. Operation and Maintenance of HVAC Piping and Pumps

3. Operation and Maintenance of HVAC Air Distribution

4. Operation and Maintenance of Central Heating Equipment

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USC Mechanical Standard Guideline 12 Revised August 2011

5. Operation and Maintenance of Central Cooling Equipment

6. Operation and Maintenance of Central HVAC Equipment

7. Operation and Maintenance of Decentralized HVAC Equipment

8. Diagnostic Systems for HVAC

23 05 00 Common Work Results for HVAC

1. Common Motor Requirements for HVAC Equipment 1.1. Selection & Sizing

c. Drives rated / duty motors shall be specified for all motors larger than 5 horsepower,

otherwise to be specified for all motors that are designed to be controlled by a VFD.

d. Premium efficiency motors shall be specified for all motor sizes 3 Hp and above.

e. Acceptable motor manufacturers:

• Lincoln, • Baldor, Reliance • US Motors • GE, • or approved equal

f. Motors shall be properly rated and enclosed, based on their proposed location in the

following categories:

• Indoors • Indirectly exposed to outdoor conditions • Completely exposed to outdoor conditions

g. Special consideration shall be given for the selection and placement of fan motor that

serve lab exhaust systems and come in contact with effluents being removed.

h. All VFD’s as part of a single project shall be provided by a single manufacturer. University approved VFD’s manufacturers are:

• DanFoss Graham, • ABB, • or approved equal

i. All hydronic system or distribution pumps 10 Hp or larger shall be provided with VFD’s

for general start-up and control, regardless of whether intent is to vary their speed.

j. All hydronic pumps designed to have their speed varied, shall be provided with a VFD.

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USC Mechanical Standard Guideline 13 Revised August 2011

k. All fan systems greater 10 Hp or larger shall be provided with VFD’s for general start-up and control, regardless of whether intent is to vary their speed.

l. All fan systems designed to have their speed varied, shall be provided with a VFD.

m. For mechanical systems in which complete equipment redundancy will not be

provided, associated VFD’s shall be provided with 3-contactor by-passes (in order to by-pass drive, control in hand, or automatic).

n. Single VFD shall never be allowed to control multiple motors. In the case of parallel

redundant pumps or fans provided, while no by-pass will be required at the drives themselves, individual VFD’s shall be provided accordingly.

o. VFD’S shall be specified with the correct enclosure, NEMA rated for proposed location

and whether in-directly or directly exposed to outdoor / weather elements.

p. VFD start-up shall be completed by manufacturer trained and certified representatives.

1.2. Construction

a. All power and low voltage terminations into and distribution out of VFD’s shall be done so at the bottom of the drive cabinet, and shall be done so with factory provided panel knock-outs.

b. It is recommended that VFD’s for fan systems (AHU’s) not be mounted within unit cabinet. If mounted remotely from unit and out of direct line of sight from equipment, auxiliary disconnect shall be provided on or adjacent to equipment, along with necessary contacts to de-energize drive.

c. All code required clearances in front of VFD’s shall be maintained, and if discrepancy

arises which is not flagged by City inspectors, FMS shall have final approval discretion.

d. If VFD is mounted onto AHU and center of drive cabinet is located at our above 72”, as a result of AHU being elevated on associated support structure, permanent ladder and necessary walking platform shall be provide for maintenance personnel access.

e. VFD’S shall be mounted and located so that code related clearance area does not

encroach on adjacent equipment service clearances.

f. VFD’s shall be located and mounted such that there is a level finished floor surface (pad) throughout entire width of drive and full code required clearance in front of drive.

g. Operations and maintenance manuals shall not be left at bottom of cabinet or adjacent

to heater provided for internal temperature control of drive components.

1.3. Access

1.4. Accessories

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USC Mechanical Standard Guideline 14 Revised August 2011

a. See standard control diagrams (found outside of this guideline) for confirmation of VFD monitoring and control points, which shall be hired wired and made available for interface with either the local building automation or campus Energy Management systems. Respective internal modules and circuitry necessary to allow for these items to be hard-wired, shall be specified accordingly.

1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Expansion Fittings and Loops for HVAC Piping

2.1. Selection & Sizing

a. Install expansion loops , Z-bend, U-bend, and compensators as necessary to allow

expansion and contraction in piping systems.

b. Expansion loops consist of (3 or 4) 90° elbows connected by straight length of pipe to form a “U” or “Z”.

c. Expansion loops shall be provided for chilled water, high temperature pipes such as; hot water, steam and steam condensate pipe systems, exceeding 100’-0” in horizontal length or as appropriate.

d. Calculations of anticipated expansion ( whether in specific segment or for entire

system) and proposed system for controlling expansion shall be reviewed with USC FMS.

e. Engineering documents shall provide requirements for proposed system intended to

control expansion.

f. Show expansion loops on plans and provide specifics as to their size and configuration on details (including reference to specifications and placement of mineral wool fiber).

g. Details for proper anchors and guides, and proper means of installation shall be

provided on plans and specifications.

h. Based on application, any proposed pre-fabricated expansion loop systems shall be submitted to USC FMS for review.

2.2. Construction

a. If a Z – bend or U-bend cannot be accomplished, multiple 90 degree transitions within

100’ feet of pipe can be considered a means of controlling expansion. The number of transitions and distance between them shall be determined by system and anticipate expansion calculations.

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USC Mechanical Standard Guideline 15 Revised August 2011

b. Mineral wool fiber shall be provided at all underground 90 degree elbows that are intended to act as expansion control system.

c. Pipe anchors shall be placed generally in the middle of the long straight pipe, or

otherwise provided as required.

d. Pipe guides shall be generally placed at 90° elbows or every 50 ft. apart, or otherwise provided as required.

e. Concrete design, associated with guides and anchors shall be specified to account for

size, strength, and minimum clearances required from both carrier pipe and insulation systems.

f. Sufficient clearance shall always be maintained between guides or anchors, and carrier pipe, in order to account for application / installation of chosen insulation systems. These clearances shall be dictated by insulation system manufacturer recommendations.

g. All piping shall be pressure tested prior to installation of all measures noted within

these guidelines (and those not noted yet further required).

2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Meters and Gages for HVAC Piping

3.1. Selection & Sizing

a. Provide single pair of temperature gauges at every air handling unit coil section (not every coil connection location). Installation details and specifications shall reflect this requirement.

b. Provide single pressure gauge at every air handling unit coil section (not every coil connection location), with appropriate taps offs and gauge valves. Installation details and specifications shall reflect this requirement. Where this cannot be accomplished, individual gauges are acceptable.

c. Provide single common pressure gauges, with appropriate tap offs and gauge valves, at across every hydronic equipment inlet and outlet location in which a pressure drop will be experienced. Installation details and specifications shall reflect this requirement. Where this cannot be accomplished, individual gauges are acceptable.

d. All major equipment providing a hydronic source (e.g. chiller, boiler, cooling tower) shall have pressure and temperature gauges, adjacent to the major inlet and outlet

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USC Mechanical Standard Guideline 16 Revised August 2011

points of these services. Guidelines found elsewhere in this section shall be considered (as applicable).

e. A pair of temperature gauges shall be provided and installed adjacent to building point of entry of all central hydronic utilities, in order to measure conditions entering and leaving the building as a whole.

f. A pair of pressure gauges shall be provided and installed adjacent to building point of entry of all central hydronic utilities, in order to measure conditions entering and leaving the building as a whole.

g. Provide P/T test plugs at every single inlet and outlet coil connection point (e.g. all terminal unit heating or decentralized system coils) .Installation details and specifications shall reflect this requirement.

h. In the case where coils are stacked to make-up overall coil face area, each coil connections shall be provided with individual pairs of P/T test plugs so as to be able to verify pressure and temperature drops across each individual coil. Installation details and specifications shall reflect this requirement.

i. Pressure gauges shall be of stainless steel body, and glycerin-filled instrument.

j. All temperature gauges selected for any application shall be mercury free. k. Pressure gauges shall be selected so that high limit of range does not exceed a factor

of 1.5X time the standard anticipated operating pressure for that particular system.

l. Temperature gauges shall be selected so that high limit of range does not exceed a factor of 1.5X time the standard anticipated operating temperature for that particular system.

m. Provide gauges for hydronic service with pressure snubbers and appropriate gauge valves.

n. Provide gauges for steam services with coil siphons and gauge valves.

o. Appropriate temperature gauges shall be provided at major air handling unit sections, so as to be able to validate; mixed air and discharge air temperatures (upstream and downstream of coil respectively).

p. In general P/T test plugs shall be installed adjacent to the following locations: • Adjacent to pressure and temperature gauges (where otherwise not provided) • Adjacent to pressure and temperature control sensor locations (where

otherwise not provided)

q. Ultrasonic single channel flow meters shall be provided and properly located so as to measure flow of hydronic services for an entire building.

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USC Mechanical Standard Guideline 17 Revised August 2011

r. Ultrasonic single channel flow meters shall be provided and properly located so as to measure flow for hydronic source plants (e.g. boilers, chillers), and in some cases are not only used for monitoring but also control purposes.

3.2. Construction

a. All P/T test plugs shall be installed directly adjacent to manufacturer provided coil

connection points.

b. Building level hydronic utility flow meter shall be located adjacent to building point of entry of these utilities

3.3. Access

a. All gauges shall be installed so as to themselves be serviceable, and not impact the

service of equipment adjacent to them in which they are supporting.

b. Gauges shall be mounted so as to be accessible and easily read by maintenance personnel, with proper extensions provided in high ceiling or congested areas.

3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. General-Duty Valves for HVAC Piping

4.1. Selection & Sizing

a. Hydronic service shut-off valves shall be provided at minimum at following locations:

• Each piece of equipment (both centralized and de-centralized). • Each major section of piping, such as at floor level branch risers. • The base of vertical riser or other appropriate means within the building

1. Automated and manual means of building isolation shall be provided within a building.

2. A single set of valves can be provided and the requirement to for automatic and manual control can be consolidated with provisions of mechanical override.

b. Exterior building shut-off for services shall be provided by campus central utility

c. See separate section found elsewhere within this guideline for labeling requirements of general duty valves.

d. See separate section found elsewhere within this guideline for insulation requirements

of general duty valves.

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USC Mechanical Standard Guideline 18 Revised August 2011

e. On a per project basis, a single manufacturer shall be provided for all like service and

type valves.

f. Acceptable Manual Valve Manufacturers (as applicable by valve type)

• Nibco, • Crane, • Grinnell • Apollo • Watts • Or approved equal

g. Acceptable Automated / Control Valve Manufacturers

• Honeywell • Belimo • Bray • Or Approved equal

Service Valve Type Size Material Joining

Method High Pressure Steam

(HPS)

Steam Condensate (CR)

Gate or Globe Valve <2½” Bronze Screwed Gate or Globe Valve >3” Bronze Flanged

Strainer All Bronze Screwed or Flanged

Low Pressure Steam (LPS)

Steam Condensate

(CR)

Gate Valve <2” Bronze Screwed Gate Valve >2½” Steel Flanged

Globe Valve <2” Bronze Screwed Check Valve <2” Bronze Screwed

Check Valve >2½” Steel Flanged

Chilled Water (CHW)

Heating Hot Water

(HHW)

Condenser Water (CDW)

Ball Valve <2” Bronze Threaded Butterfly Valve >2½” Steel

Swing Check Valve <2” Bronze Threaded Non-Swing Check

Valve <2” Bronze Threaded

Non-Swing Check Valve

>2½” Steel

Strainers <2” Bronze Screwed Strainers >2½” Steel Flanged

Strainers- Basket Type (CDW only)

All Steel Flanged

4.2. Construction

Page 19: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 19 Revised August 2011

a. Provide chain operators for all equipment room valves 4-inches and larger which are

located over 6-feet, 6-inches above the finished floor.

4.3. Access

a. All valves shall be installed to be readily accessible by maintenance personnel, and appropriate means for exercising these valves.

4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

5. Hangers and Supports for HVAC Piping and Equipment

5.1. Selection & Sizing 5.2. Construction 5.3. Access 5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Heat Tracing for HVAC Piping

6.1. Selection & Sizing 6.2. Construction 6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

7. Vibration and Seismic Controls for HVAC Piping and Equipment

7.1. Selection & Sizing 7.2. Construction 7.3. Access 7.4. Accessories 7.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

8. Identification for HVAC Piping and Equipment

8.1. Selection & Sizing

Page 20: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 20 Revised August 2011

a. Numbering of any equipment within an existing building shall be coordinated and confirm with FMS. Final equipment designation / numbering shall be in accordance with next available equipment tag sequence, as dictated by Computerized Maintenance & Management System, an in accordance with standard established for that building.

8.2. Construction

a. Submittals for all systems captured under this category shall be provided to FMS for

review and approval.

b. Provide stick on dots to locate equipment above T-bar type panel ceiling. These shall be located in corner of panel closest to equipment. Dots shall be blue for HVAC related (dampers, valves, terminal boxes, etc) and red for controls.

8.3. Access 8.4. Accessories 8.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

9. Anti-Microbial Coatings for HVAC Ducts and Equipment 9.1. Selection & Sizing 9.2. Construction 9.3. Access 9.4. Accessories 9.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

10. Anti-Microbial Ultraviolet Emitters for HVAC Ducts and Equipment

10.1. Selection & Sizing 10.2. Construction 10.3. Access 10.4. Accessories 10.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

11. Testing, Adjusting, and Balancing for HVAC

11.1. Selection & Sizing

a. Only AABC certified TAB contractor are approved and shall be allowed to provide air

and water testing and balancing projects for all project types.

Page 21: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 21 Revised August 2011

• Suggested TAB vendors i. American Air Balance ii. Approved equal

b. The TAB Contractor shall be a sub-contractor to the General Contractor and shall not

be a sub-contractor to the Mechanical Contractor.

c. The Mechanical Contractor shall coordinate his work with the TAB Contractor and correct any system deficiency identified with the General Contractor’s and TAB

d. Balance air flows to the following tolerances:

• Supply Diffuser: 0 to +10% of design • Return: +/- 5% of design • Exhaust: 0 to -10% of design • In all cases, maintain intended room pressurization with regard to adjacent

spaces.

e. Balance water flows to following tolerances:

• Pumps: 0 to 10% of design • Equipment (coils, heat exchangers, chillers, boilers): 0 to 5% of design

f. This procedure and results for carrying out steps A-F above are to be retained by the

Mechanical Contractor for delivery to the owner/design consultant on request

11.2. Construction

a. Test and balance test plan with proposed procedures, for all central HVAC systems, shall be submitted for review, as a means of qualifying proposed contractors and confirming extent and appropriateness of services to be provided

11.3. Access 11.4. Accessories 11.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 06 00 Schedules for HVAC

1. Schedules for Facility Fuel Service Systems

2. Schedules for HVAC Piping and Pumps

3. Schedules for HVAC Air Distribution

Page 22: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 22 Revised August 2011

4. Schedules for Central Heating Equipment

5. Schedules for Central Cooling Equipment

6. Schedules for Central HVAC Equipment

7. Schedules for Decentralized HVAC Equipment: 23 07 00 HVAC Insulation

1. Duct Insulation 1.1. Selection & Sizing

a. General insulation products for ductwork, shall always meet current applicable code

requirements (Title 24 or local amendments to), in terms of insulating effectiveness / performance. ,

b. Systems and materials selected for the purpose of insulating ductwork, shall meet all flame / smoke development requirements for use in plenum spaces or as otherwise dictated by building construction / fire separation requirements (where appropriate).

c. Systems and materials selected for the purpose of insulating ductwork shall not

consist of exposed inorganic / organic fibers to the surrounding plenum spaces or surrounding cavities.

d. Interior lining shall not be specified as for the sole means of ductwork insulation.

These systems and materials are only allowed (and shall be kept to a minimum) in cases where specific acoustical requirements are dictated.

e. Proper measures shall be taken to support insulating materials from damage or

protection to weather elements, where located outdoors or exposed to these conditions. Including but not limited to, rigid insulating products and/or exterior metal shielding.

1.2. Construction

a. Systems and material shall be selected so as to maintain a continuous vapor barrier, whose integrity shall not be compromised at insulation joint locations.

b. Consistency and appropriate means of attachment for insulation onto ductwork shall be provided so as to not compromise how these materials are secured.

1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences

Page 23: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 23 Revised August 2011

• Specifications:

2. HVAC Equipment Insulation 2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. HVAC Piping Insulation

3.1. Selection & Sizing

a. Standard means and system for insulation of underground hydronic service piping

(steam, steam condensate, chilled water, and heating hot water) shall be a field applied product similar to that manufactured by Dri-therm.

b. Pre-insulated systems for underground hydronic piping will be considered on a case by case basis, and will only be considered if field conditions do not allow for preferred standard means to be met. The quality and sizing of carrier pipe shall be in accordance with all related requirements, as defined elsewhere within this guideline. The submitted product shall include a high density protective exterior jacketing and the overall insulating effectiveness shall not violate requirements defined elsewhere within this guideline. Field insulation at underground fitting and valve locations is not allowed, and shall be factory fabricated and field applied to maintain integrity of entire system.

c. General insulation products for hydronic piping distributed above ground and within a

building shall always meet current applicable code requirements (Title 24 or local amendments to), in terms of insulating effectiveness / performance.

d. Systems and materials selected for the purpose of insulating piping, shall meet all flame / smoke development requirements for use in plenum spaces or as otherwise dictated by building construction / fire separation requirements (where appropriate).

e. Systems and materials selected for the purpose of insulating piping shall not consist of

exposed inorganic / organic fibers to the surrounding plenum spaces or surrounding cavities.

f. Proper measures shall be taken to support insulating materials from damage or

protection to weather elements, where located outdoors or exposed to these conditions. Including but not limited to, rigid insulating products and/or exterior metal shielding.

g. Insulation product shall not contain any known organic hazardous materials, or

variations of.

Page 24: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 24 Revised August 2011

h. Wrapped insulating products, similar to what is generically known as Armoflex is not

allowed. Application of such shall be submitted for approval and should be kept to an absolute minimum when justifying the use of such.

i. Specified insulating materials and associated jacketing shall be selected for

application of anticipated operating temperatures.

3.2. Construction

b. General insulation systems (including fittings and valves) to be utilized for either above or below ground applications shall be factory fabricated, and done so in such a manner so to allow easy future removal and re-attachment.

c. Field insulation of pipe fittings, valves, and accessories is not recommended and to be kept to an absolute minimum.

d. At no point shall a continuous vapor barrier not be maintained or impacting integrity of protection from external elements.

e. General insulation products for hydronic piping distributed above ground shall be provided with corrugated metal jacketing when distributed outside of a building, and an appropriate plastic jacketing when exposed within a mechanical room or when installed at a height of 6 foot (or below) from the finished floor directly beneath.

f. Proper rigid insertion rings shall be installed between insulation and carrier pipe at all pipe support points, in order to protect from compression of insulating material due to point loads. In addition, aluminum sleeves shall be provided bat all pipe support points, between hanger support and exterior layer of insulating system, in order to protect from compression of insulating material due to point loads.

g. Appropriate factory kits shall be procured for the insulation of pipe system fittings.

h. Insulation of piping system accessories requiring future re-occurring access and

service (strainers, valves, etc, shall be accomplished with factory fabricated insulation covers that are easily removed and re-applied.

i. Insulation shall not be applied until the following efforts (requirements of which are

found elsewhere within this guideline) have been completed. The documentation of these efforts shall be submitted to FMS for record.

• Cleaning and Flushing • Pressure Testing

3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details

Page 25: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 25 Revised August 2011

• Control Diagrams & Sequences • Specifications:

23 08 00 Commissioning of HVAC **REFERENCE RELATED SPECIFICATIONS FOR REQUIREMENTS** 23 09 00 Instrumentation and Control for HVAC **REFERENCE RELATED SPECIFICATIONS FOR REQUIREMENTS**

1. Instrumentation and Control Devices for HVAC 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications: **SEE VERBIAGE UNDER DIFFERENT COVER**

2. Direct-Digital Control System for HVAC

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications: **SEE VERBIAGE UNDER DIFFERENT COVER**

3. Electric and Electronic Control System for HVAC

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications: **SEE VERBIAGE UNDER DIFFERENT COVER**

4. Pneumatic Control System for HVAC

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details

Page 26: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 26 Revised August 2011

• Control Diagrams & Sequences • Specifications:

5. Pneumatic and Electric Control System for HVAC 5.1. Selection & Sizing 5.2. Construction 5.3. Access 5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Sequence of Operations for HVAC Controls 6.1. Selection & Sizing 6.2. Construction 6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details • Control Diagrams & Sequences **SEE REFERENCES UNDER DIFFERENT COVER** • Specifications: **SEE VERBIAGE UNDER DIFFERENT COVER**

23 10 00 FACILITY FUEL SYSTEMS Facility Fuel Piping

1. Facility Fuel-Oil Piping

2. Facility Gasoline Piping

3. Facility Natural-Gas Piping

4. Facility Liquefied-Petroleum Gas Piping

Facility Fuel Pumps

1. Facility Fuel-Oil Pumps

2. Facility Gasoline Dispensing Pumps

Facility Fuel-Storage Tanks 1. Facility Underground Fuel-Oil, Storage Tanks

2. Facility Aboveground Fuel-Oil, Storage Tanks

23 20 00 HVAC PIPING AND PUMPS Hydronic Piping and Pumps

Page 27: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 27 Revised August 2011

1. Hydronic Piping : For the purpose of this guideline the following sections shall pertain to the following services:

A. Chilled Water B. Steam C. Steam Condensate Return D. Heating Hot Water E. Condenser Water

1.1. Selection & Sizing

a. Piping systems shall be designed to not exceed the following pressure drop and / or

velocity criteria at specific locations:

Pressure Drop o Building laterals from site utility source: 2 feet / 100 foot o Building risers and floor / level main headers: 3 feet / 100 feet o Equipment branches / circuits or sub-headers: 4 feet / 100 foot

Velocity o General piping as covered within this section (both new and existing, shall not

exceed: 8 FPS o Steam systems: 4000 – 6000 FPM

b. Mechanical grooved systems are not allowed. Proposals for utilizing this type of system will be considered under very specific circumstances on a case by case basis (approval shall be attained by FMS).

c. Branch / circuit piping shall be sized no smaller than equipment point of connection, and shall not violate criteria found elsewhere in this guideline.

d. Regardless of sizing criteria found within this guideline, in the case where more than

one circuit / branch is to be served by a common section (sub-main) of pipe, it shall never be sized smaller than 1” inside clear dimension.

e. Individual branch circuit piping shall never be sized smaller than 3/4 “ in diameter.

f. All carbon steel piping products to be utilized for underground hydronic services (as

defined within this guideline) shall be manufactured domestically (Made in USA). g. All carbon steel piping products shall comply with ASTM / ANSI standard.

h. Underground piping shall be of appropriate grade carbon steel (as identified elsewhere

in this guideline). Underground services identified as part of these sections shall never be distributed in copper.

i. Equipment connected onto piping systems shall be provided with appropriate means

for isolating and detaching from these systems without requiring complete shut-down of them, and with the intent to minimize the extent of associated drain down.

Page 28: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 28 Revised August 2011

j. Single line pipe and instrumentation diagrams (PI&D) shall always be provided to

reflect new installation of, or connections to existing piping systems; in order to identify major system components (coils, Hx’s, chillers, pumps, expansion tanks, etc) to be affected / added / deleted, and changes to piping distribution that service them.

k. Unless building system field / design conditions or major conflicts will not allow, main

utility pipe headers shall be distributed in corridor or common areas for ease of access outside of occupied spaces

l. Weldolets and Threadolets are acceptable. Stab-in welded pipe or t-drill branch tees

are not acceptable. Hot tapping will only by allowed under very specific circumstances and shall be considered on a case by case basis (approval shall be attained by FMS).

m. Steam vaults shall be provided at 300 foot (overall developed length) intervals Final

interpretation of when and whether shall be provided shall be done so by FMS.

n. Proper trapping and drainage of system and associated low points shall always be addressed, means of which shall be defined on documents.

o. Piping & Fitting Material Selection

Service Size Location Material Joining

Method Chilled Water All Underground Schedule 40 Black Welded Chilled Water 2” or < Above Ground Rigid Copper (Type K) Brazed Chilled Water > 2” Above Ground Schedule 40 Black Welded

Heating Hot Water All Underground Schedule 40 Black Welded Heating Hot Water 2” or < Above Ground Rigid Copper (Type K) Brazed Heating Hot Water > 2” Above Ground Schedule 40 Black Welded

Steam All Underground Schedule 40 Black Seamless Welded

Steam All Above Ground Schedule 40 Black Seamless Welded

Steam Condensate All Underground Schedule 80 Black Welded Steam Condensate All Above Ground Schedule 80 Black Welded

Cooling Coil Condensate All Above Ground Rigid Copper (Type L) Soldered

Cooling Coil Condensate All Underground Not Allowed Not Allowed

Condenser Water All Above Ground Schedule 40 Welded Cooling Tower

Chemical Feed Lines All Above Ground PVC Schedule 80 Welded

Boiler Chemical Feed Lines All Above Ground Schedule 10 Stainless

Steel Welded

p. Piping grade or slope criteria for complete drainage and venting

Page 29: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 29 Revised August 2011

Type of Piping Slope Direction of Fall

Hot water heating (supply & return) 1” per 40’-0”

Provide slope arrows on plan & provide drain valve at low

points of system

Steam (runout to equipment) 1” per 10’ Back to mains

Steam (main) 1” per 10’ Down in the direction of flow

Chilled Water 1” per 40’-0” Down in direction of flow

1.2. Construction

a. Piping systems shall be anchored and supported in accordance with local code requirements and recognized industry standards, and done so as to allow for expansion of these systems without damage to piping, equipment, or building.

b. Piping systems shall always be distributed parallel to building walls.

c. Changes in direction in the horizontal plane shall be done so with right angle (90 degree) fittings.

d. Changes in direction in the vertical plane shall be done so with 45 degree fittings

whenever possible, otherwise right angle (90 degree) fittings acceptable.

e. For all common hydronic piping systems serving a multi-story building, means of isolation shall be provided at every floor / level in order to allow shut down of these floor / level service in their entirety.

f. Provide acceptable drains at major system low points and at every major floor / level

connection point to primary building riser (in order to allow for system drainage). These drain assemblies shall be provided downstream of floor isolation valves noted elsewhere in the guideline, so as to be able to drain a single floor at a time.

g. Provide unions or flanges (as appropriate) adjacent to valves, control instrumentation,

regulators, and prior to final equipment connections, for removal of all appurtenances that may require maintenance or replacement.

h. Manual air vents shall be installed at all system high points and de-centralized

hydronic coil connections.

i. Automatic air vents shall be installed at all centralized hydronic coil connections or other hydronic systems exposed and located in service / equipment rooms. Automatic air vents shall be piped and discharged at nearest approved receptor.

Page 30: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 30 Revised August 2011

j. For steam service supply piping, 45 degree fittings for change in vertical or horizontal

direction are not allowed. These changes can only be made with 90 degree fittings.

k. For underground utilities, minimum coverage of 36” from top of pipe to top of finished grade directly above shall be maintained at all times. Exceptions will be considered on a case by case basis, and the general rule shall be to go below conflicting utilities as oppose to above. If an when coverage must be less than 36”, appropriate measures shall be submitted for approval so as to assure proper load distribution for anticipated vehicular traffic.

q. For all underground services (as defined and covered within this section), preferred

means of back-fill and compaction shall be native soil, introduced in 6” layers and compacted to 95%. Any other alternatives may be considered on a case by case basis, and only if field conditions pose significant challenges to meeting the above.

r. Special attention to be placed on the appropriate means of separation between

dissimilar metals, in order to avoid dielectric deterioration. This includes avoiding pipes and conduit systems for different services coming into physical contact with one another.

• Provide 6” brass nipple on either side of dielectric union(s) .

s. Dielectric gaskets are only allowed when means of joining pipe or valves within a pipe

system are flanged (circumstances of which are define elsewhere in this guideline).

t. When installing new segments of underground piping utilities, by-pass loops shall be provided at either end so as to allow for appropriate cleaning and flushing of new system.

u. When connecting building onto campus central hydronic piping systems, means of

isolation and by-pass shall be provided so as to separate the building cleaning and flushing efforts from that of the site utility.

v. All points and related appurtenances (requiring access) for underground utility systems

and shall be provided with traffic rated removable covers / lids. Covers shall maintain exterior collar so that removable portion does not come in direct contact with finished hardscape. Covers shall be installed flush with finish grade and subsequently identified (by means of welding) in accordance with FMS criteria for doing so on a per utility stand-point.

w. All piping distribution system (1) changes in direction, (2) changes in size, (3) branch

connections, (4) or at final equipment connections; shall be done with industry standard pre-manufactured fittings. “BULL HEAD CONNECTIONS NOT ALLOWED”

x. All low points on steam distribution systems shall be properly trapped and drained.

y. Goal for all underground utilities (as defined and covered within this section), is to

maintain pipe inverts at no lower than 5 feet below finished grade. Consideration to

Page 31: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 31 Revised August 2011

criteria (found elsewhere within this guideline) as it relates to minimum coverage, shall be accounted for in conjunction with this requirement.

z. Piping systems shall not be distributed within or through electrical or

telecommunication utility rooms, unless intended to provide service to HVAC systems designed to control temperature of these rooms.

1.3. Access

a. All piping found within or distributed through building equipment rooms shall remain

exposed and not concealed within or imbedded into Architectural / Structural systems (wall, floors, etc).

b. Above ground piping shall be installed so as to be serviceable points of isolation (and to extent possible at pipe joints) through an acceptable accessible ceiling system or other appropriate means.

c. If manual air vents are deemed required at high points of underground hydronic pipe

distribution, proper extensions to grade and valve covers shall be provided.

d. All underground piping appurtenances that will need to be exercised / actuated, either by manual or automatic means, shall be provided with appropriate means of access (including mechanical extensions, sleeves, and covers).

e. All major instrumentation required when connecting of buildings onto central utilities, or

those utilized to control or monitor major building systems shall be accessible and provided with enough clearance to service and/or replace.

1.4. Accessories

a. When connecting a new or existing building onto either the campus central chilled

water or heating hot water utility, the following items shall be provided as a means of isolation and monitoring of demand of these services at a building level. All of the items listed below are to be either monitored or controlled via building / campus automation systems.

• Ultrasonic flow meter (as manufactured by G.E. or approved equal)

• Manual (line size) isolation valves at or nearby point of entry into building i. Manual and automated valves can be consolidated into a single pair if

automated valves are selected with a gear operated override.

• Automated (line size) isolation valves at or nearby point of entry into building i. Manual and automated valves can be consolidated into a single pair if

automated valves are selected with a gear operated override.

Page 32: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 32 Revised August 2011

• Weldolets or threadolets (as appropriate) ports on the supply and return piping, to allow for measurement of both incoming and outgoing system (1) temperatures and (2) pressures.

1.5. Related Documents • Installation Details • Control Diagrams & Sequences • Specifications:

2. Hydronic Pumps

2.1. Selection & Sizing

a. All central building hydronic systems, including (but not limited to the following

services); (1) chilled water, (2) condenser water, and (3) heating hot water; shall be provided with 100% redundancy in terms of distribution pumps. Redundant pump(s) are intended to function as stand-by, yet shall be operated on a lead / lag sequence that allows for even sharing of overall run time hours.

• Any deviation from the above must be submitted for approval, and at minimum Variable Frequency Drives for distribution pumps shall be provided with by-pass, and meet all other requirements specified within all related sections found here within.

b. It is suggested that all distribution pumps are selected and sized so each meet 100% of the proposed load. Any deviation from this shall be submitted for review, along with justification for suggesting a different strategy in terms of sizing to match loads, as well as meeting the intent of requirement to provide redundancy.

c. Closed coupled end suction pumps are to be specified for ranges of 5 horsepower or less.

d. End suction, base mounted, coupled pumps may be used where selection provides an

efficiency of not less than 75%.

e. Do not specify pumps with impellers exceeding 90% of the impeller diameter range for the pump casing.

f. Suction piping should be at least one pipe size larger than the pump section

g. Use eccentric reducers for all horizontal suction piping.

2.2. Construction

a. Provide and arrange piping and valves so that a single pressure gauge may be used

to read both pump suction and discharge pressures.

Page 33: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 33 Revised August 2011

b. Suction strainers should be avoided wherever possible, and piping shall be installed so as to allow 5 diameter straight length of pipe before connecting to pump suction end.

c. Not permitted the use of flexible isolators to correct misalignment of piping.

d. Flexible pipe isolators are not be used as a means of correcting the misalignment of

piping.

2.3. Access

a. Pumps should be laid out and specified so removal can be accomplished without significant piping disassembly.

2.4. Accessories

a. Use flexible type coupling with EPDM sleeve, solid foot mounted volute.

b. Pumps are to have mechanical type seals.

c. Entering and leaving flanges are to be drilled and tapped for gauge connections.

d. Furnish coupled pumps with manufacture’s standard steel base.

2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Automatic Condensate Pump Units 3.1. Selection & Sizing

a. Pump shall be selected to overcome estimated pressure drop to anticipated

condensate point of termination.

b. It shall be noted on documents whether pumps are integral to unit / equipment they serve, or specified separate to associated equipment.

c. It shall be noted on documents whether pump is to be powered through unit / equipment they serve, or to otherwise be power separately.

3.2. Construction

a. Pumps shall be installed on level support, and inlet located lower than condensate pan

discharge connection.

b. If not integral to unit / equipment they serve, pump shall be properly specified, or enclosure provided, to meet UL listing or equivalent code requirements.

Page 34: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 34 Revised August 2011

3.3. Access

a. Pumps shall be located in area with adequate service clearance, and shall be installed

in such a manner to allow for simple removal and repair of existing, or outright replacement of pump unit with similar new.

3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 22 00 Steam and Condensate Piping and Pumps

1. Steam and Condensate Heating Piping 1.1. Selection & Sizing

a. SEE REFERENCES MADE TO THESE SYSTEMS WITHIN 23 20 00

1.2. Construction

a. SEE REFERENCES MADE TO THESE SYSTEMS WITHIN 23 20 00

1.3. Access

a. SEE REFERENCES MADE TO THESE SYSTEMS WITHIN 23 20 00

1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Steam Condensate Pumps

2.1. Selection & Sizing

a. Condensate pumps shall be of packaged duplex-type with common bas, furnished with

receiving tank, requested accessories, and controls.

b. Receiving tank shall be cast iron and furnished with inlet strainer, gauge glass, air discharge separator, and automatic ball float operated valve.

c. Pumping units shall be bronze fitted throughout and rotating parts shall be dynamically

balanced. Receiving tank, pumping units, and motors shall be assembled by manufacturer to form an integral unit.

Page 35: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 35 Revised August 2011

d. Unit shall be furnished with condensate and air discharge valves, vacuum relief valve,

compound gauge, thermometer, and companion connection flanges.

e. Shall be factory tested as complete unit and shall have single power connecting point.

f. Pumps shall be close-couple with strainer and bronze isolation valve between receiver and pump.

g. Unit shall be furnished with electric alternators (or other acceptable control means) to

automatically transfer operating sequence of pumps.

h. Provide units with float type level switches for mid and high level alarms, Local alarm announciation and alarm silencing switch shall be provided.

i. Provides separate mid and high level alarm dry contacts for building automation

system.

j. Acceptable manufacturers:

i. Hoffman, ii. Roth iii. approved equal.

2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 23 00 Refrigerant Piping

1. Refrigerant Piping Valves 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Refrigerant Piping Specialties 2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories

Page 36: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 36 Revised August 2011

2.5. Related Documents • Installation Details • Control Diagrams & Sequences • Specifications:

3. Refrigerant Safety Relief Valve Discharge Piping 3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Refrigerants 4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 24 00 Internal-Combustion Engine Piping

1. Internal-Combustion Engine Remote-Radiator Coolant Piping\

2. Internal-Combustion Engine Exhaust Piping

23 25 00 HVAC Water Treatment

1. Water Treatment for Closed-Loop Hydronic Systems 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications: **REFERENCE SPECIFICATIONS UNDER DIFFERENT COVER**

2. Water Treatment for Open Hydronic Systems

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details

Page 37: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 37 Revised August 2011

• Control Diagrams & Sequences • Specifications: **REFERENCE SPECIFICATIONS UNDER DIFFERENT COVER**

3. Water Treatment for Steam System Feedwater

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Water Treatment for Humidification Steam System Feedwater 4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 30 00 HVAC AIR DISTRIBUTION 23 31 00 HVAC Ducts and Casings

1. Metal Ducts 1.1. Selection & Sizing

a. Building chases, shafts, tunnels and mechanical rooms shall not be used as supply

,outside air, or return air plenums. Air shall be ducted within these spaces. This guideline is not meant to prohibit the use of ceiling return air plenums.

b. Return air plenums shall not be used where above ceiling construction has spray-on cellulose or mineral fiber fireproofing or exposed fiberglass building insulation.

c. Collect return air at multiple central locations to avoid severe short circuiting of air from

large floor areas with single point return.

d. Provide transfer openings in walls that extend above ceiling to underside of structure to allow plenum air to transfer freely. Coordinate transfer openings with architect so openings are shown on general construction drawings.

e. Provide smoke and fire dampers in transfer openings where required by partition

rating. Special attention shall be given to specification of these items so they are compatible with existing or proposed new fire alarm system.

Page 38: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 38 Revised August 2011

f. For air-handling units, where sound traps are provided in main supply/return air ductwork, these shall be located in close proximity to discharge/intake from unit.

g. Suggest provisions for sound attenuation or minimum amount of lining directly

downstream of air handling unit discharge, to prevent fan noise breakout from entering occupied spaces.

h. Duct systems shall be designed using radius elbows without turning vanes wherever

possible. Branch takeoffs shall be designed with conical fittings or 45 degree entry taps.

i. Ductwork shall be size, selected and configure as to minimize the pressure drop to

1.5” from the fan discharge to the exit if the diffuser in the conditioned space. This includes all sound traps and other system losses

j. Locate fresh air intakes (OSA) for air handling units to prevent contamination from

kitchen exhaust, garage exhaust, or any process. Suggest these intakes kept upstream of prevailing winds and as distant as possible.

k. Limit fresh air intakes (OSA) velocity to 750 FPM through net free louver area at 100

percent fresh air quantities to keep noise, pressure drop and rain carryover to a minimum.

l. Pressure Classification:

i. Construct the following for 1” w.g. pressure class (MINIMUM):

1. Supply ductwork downstream of terminal boxes. 2. Low pressure supply and return ductwork at fan coil units which are direct

driven. 3. If anticipated operating pressure exceeds 1”, next pressure classification

level in this guideline shall be referenced.

ii. Construct the following for 2” w.g. pressure class (MINIMUM): 1. Return air ductwork 2. Exhaust air ductwork 3. If anticipated operating pressure exceeds 1”, next pressure classification

level in this guideline shall be referenced.

iii. Construct the following for 4” w.g. pressure class (MINIMUM): 1. Supply ductwork and plenum downstream of supply fan up to terminal

boxes.

iv. Construct the following for 6” w.g. pressure class (MINIMUM): 1. Where anticipated operating pressure exceeds all noted above.

m. Utilize a maximum air velocity of 1200 FPM in the duct main loops (high pressure) or

an air pressure drop of 0.08” per 100’ of ductwork, including fittings, transitions and the like, whichever provides the largest ductwork to comply with the 1.5” overall system pressure drop.

Page 39: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 39 Revised August 2011

n. Maximum velocity of 1200 FPM shall be re-visited in cases where no ceiling system

exist or distribution is exposed, or otherwise where special acoustical considerations are required.

o. Utilize a maximum air velocity of 800 FPM in secondary branch ductwork (low

pressure) or an air pressure drop of 0.08” per 100’ of ductwork, including fittings, transitions and the like, whichever provides the largest ductwork to comply with the 1.5” overall system pressure drop.

p. Depending upon the actual configuration and routing of the ductwork, the actual

maximum velocities and maximum pressure drops may be lower than the 1200 FPM velocity and 0.08”/100’ pressure drop limitations described above.

q. Utilize a looped system wherever possible. If a duct loop cannot be utilized design the

duct run out at a maximum air pressure drop of 0.08” per 100’ of ductwork, including fittings, transitions and the like.

r. Wherever possible or where not allowed based on application, utilize full ducted return

system, in lieu of plenum return system.

s. Transfer ducts shall be sized for a duct velocity of 300-500 fpm.

t. If an acoustical engineer is present on a project, please follow their recommendations. If there are any discrepancies versus USC standards, please notify USC construction project manager so to bring to attention of FMS.

u. Grease exhaust ductwork shall be sized per current mechanical code.

1.2. Construction

a. Flexible duct is allowed at connections to supply diffusers and grilles. When provided,

the maximum length of flexible duct is limited to 6 feet. Alumaflex is not acceptable on campus.

b. In lieu of rectangular ductwork, oval duct is allowed for medium and low pressure ductwork. Oval duct shall only be allowed for systems under positive pressure, not allowed for systems under negative pressure.

c. Type 1 Hood Dishwasher exhaust ductwork shall be constructed of stainless steel (18

gage)

d. Type 2 Hood grease exhaust ductwork shall constructed of black steel welded or stainless steel.

e. In all cases, ductwork selection and construction shall be based on the more stringent

of the following,(1) current SMACNA standards, (2) current California Mechanical Code with local amendments.

Page 40: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 40 Revised August 2011

1.3. Access

a. Access doors for grease exhaust ductwork shall be provided per the current mechanical code.

1.4. Accessories

a. Manual balance dampers shall be shown at each major branch takeoff and at run outs to diffusers and grilles of supply, return and exhaust ductwork. Locate balance dampers back from diffusers and grilles as far as possible to reduce damper generated noise. Avoid using ceiling diffusers/registers with opposed blade dampers (OBD).

b. Combination smoke-fire dampers shall be provided with smoke detectors and visible alarm with test station. The station shall be remotely mounted on a wall or on the ceiling in the vicinity of the smoke detector

1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Nonmetal Ducts

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. HVAC Casings

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 32 00 Air Plenums and Chases

1. Fabricated, Metal Air Plenums

1.1. Selection & Sizing

Page 41: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 41 Revised August 2011

a. SMACNA guidelines shall govern proper selection and construction of these items. In case where SMACNA violates code, CMC with local amendments shall govern.

b. All guidelines within 23 21 00 shall be referenced here, as applicable.

c. Guidelines for lining of fabricated metal air plenums shall follow requirements found elsewhere within these standards.

1.2. Construction

a. Proper support of plenums shall be provided, of which may be above standard

ductwork support systems.

1.3. Access

a. Installation of plenums shall not impede access to adjacent equipment or portions of ceilings / rooms in which they are installed.

1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Air-Distribution Ceiling Plenums

2.1. Selection & Sizing

a. Other than approved return air plenums for centralized systems that are collected on a

common floor, ceiling plenums are not allowed for distribution of supply, outside, or exhaust air, to or from respective HVAC fan systems.

2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Air-Distribution Floor Plenums

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences

Page 42: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 42 Revised August 2011

• Specifications:

4. Air-Distribution Wall Plenums

4.1. Selection & Sizing

a. These systems are not allowed as sole means for distributing air to or from HVAC fan systems (centralized or de-centralized), metal ductwork shall be incorporated into overall plenum system so air does not come into direct contact with architectural / structural enclosures.

4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

5. Air-Distribution Chases Formed by General Construction

5.1. Selection & Sizing

a. This is not an approved means for distribution of supply air and shall not be

considered as a replacement to metal ductwork (requirements of which found elsewhere in these guidelines).

b. This is not an approved means for capture and distribution of return air, outside air, or exhaust air to de-centralized or centralized HVAC fan systems.

5.2. Construction 5.3. Access 5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Acoustical Air Plenums

6.1. Selection & Sizing 6.2. Construction 6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

Page 43: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 43 Revised August 2011

23 33 00 Air Duct Accessories

1. Dampers 1.1. Selection & Sizing

a. Volume dampers shall be located on rigid portion of low pressure ductwork distribution,

and shall be provided with locking mechanisms.

b. Design strategy of both fire separations and ductwork distribution shall be coordinated so at to keep the need for fire/ smoke dampers to an absolute minimum.

1.2. Construction

a. Contractor shall properly tag all volume dampers concealed within plenum space or

some other architectural system in which these items are concealed.

1.3. Access

a. Volume dampers shall be located so they are readily accessible to TAB contractors and operation and maintenance personnel.

1.4. Accessories

1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications

2. Duct Silencers

2.1. Selection & Sizing

a. Provide factory fabricated duct silencers of tubular or rectangular type, for high or low

velocity service.

b. Construct silencers of galvanized steel with casing seams sealed or welded to be airtight at a pressure differential of 8 inches water gauge between inside and outside of unit, and stiffen or brace as required to prevent structural failure or deformation at same condition, or audible vibration during normal operation.

c. Furnish an inert acoustical absorbing filler material or inorganic mineral or fibrous glass

that is vermin, moisture-proof, and will impart no odor into air stream.

d. Filler material shall meet the appropriate fire hazard classification values, when tested in accordance with recognized standards / testing agencies.

Page 44: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 44 Revised August 2011

e. Select and provide silencers from acoustical and aerodynamic rating tables based on actual test readings or interpolated values of such readings obtained from tests made by recognized independent laboratories.

f. Select and provide silencers for air pressure drops not exceeding 0.5 inches.

g. Acceptable manufacturers:

i. Industrial Acoustics Compan ii. Vibro-Acoustics iii. Approved equal

2.2. Construction

a. Airtight construction shall be provided by furnishing a duct sealing compound installed

on site.

2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Turning Vanes

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Duct-Mounting Access Doors

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

5. Flexible Connectors

5.1. Selection & Sizing 5.2. Construction 5.3. Access

Page 45: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 45 Revised August 2011

5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Flexible Ducts

6.1. Selection & Sizing

a. Flexible duct is allowed at connections to supply diffusers and grilles only.

b. Flexible duct shall be provided with inner rigid support system.

c. When provided, the maximum length of flexible duct shall be limited to 6 feet.

d. Alumaflex is not acceptable.

e. Flexible ductwork shall meet flame / spread index, as dictated by code and as

applicable for building systems in which they are found.

6.2. Construction

a. Flexible duct shall be installed and supported in such a way so as not to compromise the free open area, and shall be given the appropriate radius or plenum accessories for proper top or side connections to air outlets or inlets.

6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

7. Duct Liners

7.1. Selection & Sizing 7.2. Construction 7.3. Access 7.4. Accessories 7.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 34 00 HVAC Fans

1. Axial HVAC Fans 1.1. Selection & Sizing

Page 46: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 46 Revised August 2011

1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Centrifugal HVAC Fans

2.1. Selection & Sizing

a. References to other equipment with centrifugal fans found within can be found in other

sections within this guideline.

b. The maximum speed for exhaust fans shall be 1750 RPM

2.2. Construction

a. Exhaust fans shall be provided with access panels to all motors, fans and filters.

2.3. Access

a. Exhaust fans shall be located with so that recommended clearances are maintained for access to motor, belts and drains.

2.4. Accessories

a. Inline centrifugal and utility set fans shall be provided with Inlet/Outlet Screens, Access

Doors and Scroll Drain.

b. Rooftop exhaust fans shall be provided with factory backdraft damper, disconnect switches and roof curbs (if required) shall be required with fans.

c. For inline centrifugal and utility set exhaust fans located on the roof of buildings, provide vibration isolation.

2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. HVAC Power Ventilators

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

Page 47: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 47 Revised August 2011

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Air Curtains

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 35 00 Special Exhaust Systems

1. Sawdust Collection Systems

2. Engine Exhaust Systems

23 36 00 Air Terminal Units

1. Constant-Air-Volume Units 1.1. Selection & Sizing

a. SEE GUIDELINES TO SIMILAR REQUIREMENTS FOR SIMILAR SYSTEMS FOUND

WITHIN VARIABLE AIR VOLUME UNITS.

1.2. Construction

a. SEE GUIDELINES TO SIMILAR REQUIREMENTS FOR SIMILAR SYSTEMS FOUND WITHIN VARIABLE AIR VOLUME UNITS.

1.3. Access

a. SEE GUIDELINES TO SIMILAR REQUIREMENTS FOR SIMILAR SYSTEMS FOUND WITHIN VARIABLE AIR VOLUME UNITS.

1.4. Accessories

a. SEE GUIDELINES TO SIMILAR REQUIREMENTS FOR SIMILAR SYSTEMS FOUND WITHIN VARIABLE AIR VOLUME UNITS.

1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

Page 48: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 48 Revised August 2011

2. Variable-Air-Volume Units

2.1. Selection & Sizing

a. In exterior offices, thermostats associated with the air terminal units shall not be

located on exterior walls or walls where direct sunlight is present for extended amount of time. Locate thermostats on interior walls or on columns.

b. Do not size new air terminal units to maximum CFM capacity for units. Size units to allow for 15% growth.

c. The minimum VAV box to be specified shall be 6 size. The maximum size of VAV box

to be specified shall be 14 size.

d. Engineer-of record shall providing zoning plan including thermostat locations and associated VAV box number for review by USC FMS. This plan shall be submitted a minimum 2 weeks prior to plan check submittal date.

e. VAV boxes shall never serve both an exterior zone and an interior zone.

f. For both exterior and interior zones, the maximum number of offices a VAV zone shall

serve shall be five (5) offices and/or serve any area with a maximum square footage of 2000 sq.ft.

g. Conferences Rooms, Corner Offices and Large Copier Rooms shall be served by its

own VAV box. In tenant remodels, this is subject to review by engineer-of-record and USC FMS.

h. Hallways and corridors shall not be served by its own VAV box. They shall be served

by VAV zones that also serve adjacent office areas.

i. For office applications, the discharge temperature of supply air in heating mode shall be 85 deg F.

j. All terminal units shall include reheat coils, including those serving only interior zones.

2.2. Construction

a. Air terminal units shall be constructed of minimum 22 gage galvanized steel.

b. Plenum/attenuation sections shall be provided with minimum 5ft length of 1” thick

insulations with the units. Fiber-free insulation shall be provided as well.

c. Provide duct access panels adequately sized for inspection and cleaning of coil in ductwork upstream and downstream of coil. Where necessary, detail or specify multiple access panels for larger size reheat coils.

2.3. Access

Page 49: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 49 Revised August 2011

a. Locate air terminal units in accessible areas (ceiling grid). If a terminal unit needs to be

located over hard gypsum ceiling, a 24”x”24 minimum access panel shall be provided for access. Coordinate location of access panel with architect.

2.4. Accessories

a. Both exterior and interior zones shall be provided with minimum 2- row reheat coils.

Please see mechanical wet-side guidelines for requirements reheat coils.

2.5. Related Documents • Installation Details • Control Diagrams & Sequences • Specifications:

23 37 00 Air Outlets and Inlets

1. Diffusers, Registers, and Grilles 1.1. Selection & Sizing

a. Approved manufacturers:

• Price • Titus • Krueger • Approved equal

b. No opposed blade dampers allowed, request to use such due to justified constraints

shall be submitted to FMS for review.

1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Fabric Air Distribution Devices

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

Page 50: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 50 Revised August 2011

3. HVAC Gravity Ventilators 3.1. Selection & Sizing

a. Hooded aluminum, roof mounted gravity relief/intake ventilators, complete with all

accessories required for installation of ventilators.

b. Provide all required accessories for proper operation of ventilators per code and in accordance with design intent and sequence of operation.

c. Hood shall be low silhouette type.

d. The unit shall be of bolted and welded construction utilizing corrosion resistant fasteners. The aluminum hood shall be constructed of minimum 14 gauge marine alloy aluminum, bolted to a minimum 8 gauge aluminum support structure. The aluminum base shall have continuously welded curb cap corners for maximum leak protection. Bird screen constructed of 1/2" mesh shall be mounted across intake/relief opening.

e. Units shall be provided with bird screen and anti-condensate coating.

f. Provide gravity type back-draft or relief dampers at relief or exhaust ventilators. Gravity

relief dampers shall fully open at 0.01” static pressure.

g. Intake ventilators shall be provided with normally closed, motorized dampers that are interlocked with fan to open upon fan activation unless fan is provided with such a damper.

h. Acceptable manufacturers:

i. Loren Cook, ii. Greenheck iii. Approved equal.

3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Ventilation Hoods

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

Page 51: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 51 Revised August 2011

• Installation Details • Control Diagrams & Sequences • Specifications:

5. Commercial Kitchen Hoods

5.1. Selection & Sizing

a. Kitchen ventilation systems shall comply with the current CMC requirements, and all

applicable amendments.

b. The kitchen ventilation system shall be capable of maintaining the kitchen temperature above 68 degree F during heating and below 80 degree F during cooling.

c. The kitchen ventilation system shall operate at a lower speed to deliver less air, only

the amount necessary to maintain the room temperature, in order to conserve energy when the kitchen hood exhaust fan are off.

d. Locate control switches for HVAC equipment so to prevent unauthorized use.

e. Provide U.L. listed stainless steel kitchen hood of the 100% exhaust type. Short circuit

hood where make up air is introduced directly into the hood are not allow.

f. Provide a state fire marshal approved fire protection system inside kitchen hood.

g. Acceptable manufacturer:

i. Gaylord ii. Approved equal.

5.2. Construction 5.3. Access 5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Fume Hoods 6.1. Selection & Sizing

a. Exhaust fans must remove a fixed air quantity from each hood, unless lab design

suggest a variable volume application.

b. Hoods that have doors must have individual bypasses for air volume and face velocity regulation.

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USC Mechanical Standard Guideline 52 Revised August 2011

c. Exhaust system may consist of an individual fan for each hood, yet mani-folded systems shall be considered when installing multiple hoods.

d. Determine if there is a need for off-hour operation of hood exhaust system, and design

the system accordingly to allow for ramp down of systems during unoccupied modes.

e. Locate exhaust fans near the point of discharge to atmosphere so ducts will be under negative pressure and any leakage will be into duct.

f. Locate discharge openings with respect to fresh air intakes to avoid re-circulation.

g. Exhaust ducts for fume hoods and fans must be of non-corrosive construction. Motor

shall be explosion proof. In all cases, follow the hood manufacturer recommendations for exhaust fan sizing and system design.

h. Provide fire rated enclosure or fire wrap around fume hood duct, as required by

applicable codes.

i. Hoods shall be provided with sash velocity sensors and related alarms to locally notify hood user when face velocity is outside of acceptable thresholds.

j. Fume hood assembly, in its entirety shall be UL listed, and the material selection shall

meet appropriate

k. Fume hood shall be specified to account for all dry and wet utilities required, so as to avoid any field modifications to cabinet / enclosure.

6.2. Construction 6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 40 00 HVAC AIR CLEANING DEVICES 23 41 00 Particulate Air Filtration

1. Panel Air Filters 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

Page 53: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 53 Revised August 2011

2. Renewable-Media Air Filters

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Washable Air Filters

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Extended Surface Filters

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

5. High-Efficiency Particulate Filtration

5.1. Selection & Sizing 5.2. Construction 5.3. Access 5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Ultra-Low Penetration Filtration

6.1. Selection & Sizing 6.2. Construction 6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details

Page 54: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 54 Revised August 2011

• Control Diagrams & Sequences • Specifications:

7. Super Ultra-Low Penetration Filtration

7.1. Selection & Sizing 7.2. Construction 7.3. Access 7.4. Accessories 7.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 42 00 Gas-Phase Air Filtration

1. Activated-Carbon Air Filtration

2. Chemically-Impregnated Adsorption Air Filtration

3. Catalytic-Adsorption Air Filtration 23 43 00 Electronic Air Cleaners

1. Washable Electronic Air Cleaners

2. Agglomerator Electronic Air Cleaners

3. Self-Contained Electronic Air Cleaners

23 50 00 CENTRAL HEATING EQUIPMENT 23 51 00 Breechings, Chimneys, and Stacks

1. Draft Control Devices 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Fabricated Breechings and Accessories

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

Page 55: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 55 Revised August 2011

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Fabricated Stacks

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Gas Vents

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

5. Insulated Sectional Chimneys

5.1. Selection & Sizing 5.2. Construction 5.3. Access 5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Flue-Gas Filtration Equipment

6.1. Selection & Sizing 6.2. Construction 6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 52 00 Heating Boilers

1. Electric Boilers 1.1. Selection & Sizing

Page 56: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 56 Revised August 2011

1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Condensing Boilers

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Pulse Combustion Boilers

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Cast-Iron Boilers

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

5. Water-Tube Boilers

5.1. Selection & Sizing

a. Hot water boilers shall be used on projects where steam requirements are minimal or

this utility is not available.

b. Design engineer shall specify the efficiency and the method of calculation. System design measures shall be taken to avoid thermal shock and condensation of combustion gases in non-condensing boilers

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USC Mechanical Standard Guideline 57 Revised August 2011

c. Acceptable manufacturers:

i. Parker, ii. Cleaver-Brooks, iii. Approved equal.

d. Provide “low fire hold aquastat” to keep burner at low fire position until the water in the

boiler reaches 212°F (to prevent thermal shock to tube sheets). Once water reaches 212°F, burner modulating control shall be released to normal function.

e. Provide a microprocessor based boiler management control system with remote communications package and software package to interface with a 3rd party facility management system. Boiler management control system and remote communications package shall be capable of providing the 3rd party facility management system a 4-20 mA signal indicating the burner rate of fire (0-100%) updated once every 5 seconds (minimum).

f. A reverse return system / strategy shall be employed wherever possible, so pressure drops through piping system and each piece of equipment / circuit is relatively balanced.

g. Air separators and expansion tanks shall be provided on all hot water heating systems

regardless of piping arrangement.

h. Provide Low Nox hot water boilers which must meet minimum state and local efficiency and emission standards.

5.2. Construction

a. Systems air separator shall be located in the piping on the suction side of the pump.

b. The piping system shall be provided with manual air vents at all high points and drain

valves shall be provided at low points of the system

c. Proper provisions shall be made for expansion of pipes using expansion loops, swing joints, offsets, etc. (as may be required).

5.3. Access 5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Fire-Tube Boilers

6.1. Selection & Sizing 6.2. Construction

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USC Mechanical Standard Guideline 58 Revised August 2011

6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 53 00 Heating Boiler Feedwater Equipment

1. Boiler Feedwater Pumps 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Deaerators

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Furnaces

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Electric -Resistance Furnaces

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

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USC Mechanical Standard Guideline 59 Revised August 2011

5. Fuel-Fired Furnaces

5.1. Selection & Sizing 5.2. Construction 5.3. Access 5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 55 00 Fuel-Fired Heaters

1. Fuel-Fired Duct Heaters

2. Gas-Fired Radiant Heaters

3. Fuel-Fired Unit Heaters 23 56 00 Solar Energy Heating Equipment

1. Heating Solar Collectors

2. Heating Solar Vacuum-Tube Collectors

3. Packaged Solar Heating Equipment

23 57 00 Heat Exchangers for HVAC

A. SHELL AND TUBE TYPE HEAT EXCHANGERS  

i. Heat exchanger: Multi‐pass, U‐tube; steel shell, 125 psi W.P.; ASME Stamp label steam in shell, water in the tubes; copper tube 5/8 inch outer diameter or larger, 125 psi W.P.; removable tube bundle; cast iron divided head with matching flange and with non‐asbestos gaskets. Attached metal name plate stating pressure rating and size of exchanger. 

ii. Shell of Heat Exchanger:  The shell of the heat exchanger will have a 3/4 inch NPT vacuum breaker installed in the designated connection.  

iii. Tubes: number of tubes per pass, number of passes and total exchange surface.  

iv. Capacity and Computations:  Do not select the unit from manufacturer’s catalog ratings.  Calculate the required size of the unit to produce the output shown after deducting for scale formation of tube surfaces, using a fouling factor of 0.0005.  

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USC Mechanical Standard Guideline 60 Revised August 2011

v. Temperature range: The temperature range for operation will be a maximum of 180 degrees F.  Applications that allow for a sliding temperature scale will be 180 degrees at 32 degrees outside air temperature and 120 degrees F at 65 degrees F outside air. These systems will also shut off at temperature about 65 degrees F outside air. The circulation pumps on these systems will run for a minimum of 10 minutes after the steam has been shut down to eliminate the possibility the temperature of the exchanger exceeding the 180 degrees F.  

1. Steam-to-Steam Heat Exchangers 1.1. Selection & Sizing

a. Heat exchanger: Multi-pass, U-tube; steel shell, 125 psi W.P b. Copper tube 5/8 inch outer diameter or larger, 125 psi W.P.; removable tube bundle;

cast iron divided head with matching flange and with non-asbestos gaskets.

c. Attached metal name plate stating pressure rating and size of exchanger.

d. The shell of the heat exchanger shall have a 3/4 inch NPT vacuum breaker installed in the designated connection.

e. Equipment schedule shall designate umber of tubes per pass, number of passes and

total exchange surface.

f. Calculate the required size of the unit to produce the output shown after deducting for scale formation of tube surfaces, using a fouling factor of 0.0005.

1.2. Construction

g. Gage shall be three inch minimum and placed in such a manner that they are easily visible from the service area.

h. Hx i.

1.3. Access

j. Frame for support of the heat exchanger and associated equipment will be built in

such a manner as to not interfere with the service of the equipment and be structurally sound. Steel will be galvanized or painted to protect it from corrosion.

1.4. Accessories

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USC Mechanical Standard Guideline 61 Revised August 2011

k. All Steam traps shall be piped with unions to allow removal and installation in such a manner to allow ease of removal.

l. All shut-off and isolation valves shall be gate valves.

m. Steam relief valves at 125 PSI, size of the heat exchanger with the vents piped to the outside of the building above the roof line away from over-hangs and air intakes.

n. Hot water relief will 75 PSI, size of the heat exchanger and piped to a sanitary drain.

1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Steam-to-Water Heat Exchangers

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Liquid-to-Liquid Heat Exchangers

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Direct Geoexchange Heat Exchangers

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 60 00 CENTRAL COOLING EQUIPMENT

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USC Mechanical Standard Guideline 62 Revised August 2011

23 61 00 Refrigerant Compressors

1. Centrifugal Refrigerant Compressors

2. Reciprocating Refrigerant Compressors

3. Scroll Refrigerant Compressors

4. Rotary-Screw Refrigerant Compressors 23 62 00 Packaged Compressor and Condenser Units

1. Packaged Air-Cooled Refrigerant Compressor and Condenser Units 1.1. Selection & Sizing

a. Unless specific conditions are identified, air cooled package chillers shall not be used

for the purpose of building HVAC central chilled water equipment. Justification to deviate from this guideline and not utilize packaged water chiller equipment shall be submitted to University FMS for review and approval.

b. Approved manufacturers: • Trane • Approved equal

1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Packaged Water-Cooled Refrigerant Compressor and Condenser Units

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 63 00 Refrigerant Condensers

1. Air-Cooled Refrigerant Condensers 1.1. Selection & Sizing

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USC Mechanical Standard Guideline 63 Revised August 2011

1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Water-Cooled Refrigerant Condensers

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Evaporative Refrigerant Condensers

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 64 00 Packaged Water Chillers

1. Absorption Water Chillers 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Centrifugal Water Chillers

2.1. Selection & Sizing

a. Approved manufacturers:

• Trane • Approved equal

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USC Mechanical Standard Guideline 64 Revised August 2011

b. Use water cooled centrifugal chillers above 300 tons and water cooled screw/scroll chillers below 300 tons. If due to budget or other project considerations, an air cooled option is being considered, approval from FMS is required.

c. Chiller efficiency and scheduled selection shall be based on chiller load profile according to its intended use, lead, lag, or standby and the overall chiller plant APLV (Application part load values). If the APLV is not known, then the Engineer shall use the IPLV (Integrated Part Load Value) to evaluate the plant. Fixed and variable speed drives shall be considered. Specify that the engineering design consultant shall analyze the chiller bids and make a recommendation to the prior to the Mechanical Contractor committing to any chiller manufacturer.

d. Chillers shall be sized so that when one unit is out, the remaining units shall provide at

least 70% of the anticipated block load.

e. Consider primary/secondary pumping or variable speed primary pumping where there are three of more chillers

f. Provide an expansion tank and air separator on all chilled water systems. The air

separator shall be located in the piping on the suction side of the pump. If building chillers to be connected onto and supplement the campus, expansion tank shall be piped and means shall be provided so it can be divorced from system when chiller is not in stand-alone mode, in which case system expansion is addressed centrally.

g. On primary/secondary piping arrangements, locate the de-coupler loop upstream of

the takeoff to the first set of secondary pumps. De-coupler loop length is to be minimized, but no less than 6 equivalent piping diameters. Locate a temperature sensor in the middle of the de-coupler pipe connected to the maximum pressure drop through de-coupler pipe at maximum flow is not to exceed 1.5ft head (total).

h. Pump control systems from controls vendor different to the base building automation

system provider.

i. Chiller selection and design shall allow for a primary variable operation for chillers that are intended to be connected onto and become part of systems that make-up and supplement the campus central loop / utility.

j. Chiller starters shall be unit mounted on the chiller by the manufacturer whenever

possible. Consider using chillers with variable frequency drives for increased operating efficiency.

k. Chiller selection and design shall allow for an 18 – 20 (degree F) temperature drop across the evaporator for chillers that are intended to be connected into and become part of systems that make-up and supplement the campus central loop / utility.

l. Provide an expansion tank and air separator on all chilled water systems. The air

separator shall be located in the piping on the suction side of the pump.

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USC Mechanical Standard Guideline 65 Revised August 2011

m. Low point piping, valves, and appropriate drains shall be provided directly off chiller equipment or in piping directly adjacent to tube points of connection, so as to allow for drainage of this system.

n. The piping system shall be provide with manual air vent at all high points and drain

valves at all low points of the system.

o. Provide 5-years labor and parts warranty

p. Appropriate structural and architectural building systems shall be accounted for and put in place, so as to allow for future removal and potential replacement of package water chiller equipment. At minimum, means for the disassembly of the largest equipment components shall be accounted for, along with consideration for the rigging of such equipment.

q. Design of refrigeration room shall adhere to local code and ASHRAE (or other

appropriate) industry guideline, in regards to providing means and systems for proper ventilation and space pressurization control during normal and purge operating modes.

r. Refrigerant detection approved manufacturers:

• Vulcan • Sherlock

s. Refrigerant detection system shall be specified for the anticipated refrigerant to be

utilized in the

t. Refrigerant detection control panels and system related accessories shall be installed in accordance with local code and appropriate ASHRAE (or other appropriate) industry guidelines.

u. Refrigerant detection systems shall be integrated and tied into building fire alarm system, as dictated by appropriate code sections.

2.2. Construction

a. Only Flanges or mechanical couplings are allowed within inlet pipe headers to

individual evaporator and condenser bundles. No control or monitoring accessories and related instrumentation shall be allowed in sections of pipe downstream of local system isolation valves.

b. All final piping connections to chiller barrels shall be done so with braided stainless steel connections, any other means shall be submitted for approval (no rubberized products will be allowed).

c. Connections from rupture disk to refrigerant relief piping shall be flexible metal type (no

rubberized products allowed).

d. Refrigerant relief piping shall be hard piped (rigid) out to the atmosphere and terminated at code appropriate location.

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USC Mechanical Standard Guideline 66 Revised August 2011

e. Installation and termination of electrical conduits and wiring shall be installed so as to

not hinder and interfere with the serviceability of machine, by infringing upon regions around machine that require access clearances.

f. Refrigerant detection systems (and all related accessories) shall be properly installed

through a coordinated effort with a combination of the project Electrical (Division 26) , Controls/ Low Voltage, and Fire Alarm contractors.

2.3. Access

a. Manufacturer’s guidelines for minimum clearances to be strictly adhered to.

b. Piping shall be installed in such a way so connections to individual heads can be easily removed / broken down and replaced (as needed).

c. Adequate space above and adjacent to large equipment components (compressors, drives, etc) shall be accounted for, so as to allow for the clearances needed to erect and utilize rigging equipment, and the means of removing these components for future service or replacement.

d. Provisions shall be made so as to allow for temporary removal / breakdown of inlet

piping on the head / water box of machine, for access of evaporator and condenser tubes.

e. Enough clearance shall be provided (at least one end of machine), so that access to

tube sheets and the ability to achieve full tube pull (on both the condenser and evaporator sides) can be accomplished.

2.4. Accessories

a. Interactive control interface shall be provided and installed adjacent to machine, and

shall have the capability of monitoring and maintain full local control / operation of machine operation, along with diagnostic capabilities.

b. Appropriate control modules shall be provided so specific control and monitoring points can be hardwired directly from equipment to Building Automation System. Coordinate with USC FMS for identification of the specific points required.

2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Reciprocating Water Chillers

3.1. Selection & Sizing

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USC Mechanical Standard Guideline 67 Revised August 2011

a. NOT ALLOWED FOR CENTRAL BUILDING SYSTEM HVAC PURPOSES

3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Scroll Water Chillers

4.1. Selection & Sizing

a. Use water cooled centrifugal chillers above 300 tons and water cooled screw/scroll

chillers below 300 tons. If due to budget or other project considerations, an air cooled option is being considered, approval from FMS is required.

b. These types of chillers are not acceptable if intent is to connect onto and supplement the campus central chilled water loop / utility.

c. See requirements listed under “Centrifugal Water Chillers” and apply as appropriate.

4.2. Construction

a. See requirements listed under “Centrifugal Water Chillers” and apply as appropriate.

4.3. Access

a. See requirements listed under “Centrifugal Water Chillers” and apply as appropriate.

4.4. Accessories

a. See requirements listed under “Centrifugal Water Chillers” and apply as appropriate.

4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

5. Rotary-Screw Water Chillers

5.1. Selection & Sizing

a. Use water cooled centrifugal chillers above 300 tons and water cooled screw/scroll

chillers below 300 tons. If due to budget or other project considerations, an air cooled option is being considered, approval from FMS is required.

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USC Mechanical Standard Guideline 68 Revised August 2011

b. These types of chillers are not acceptable if intent is to connect onto and supplement the campus central chilled water loop / utility.

c. See requirements listed under “Centrifugal Water Chillers” and apply as appropriate.

5.2. Construction

a. See requirements listed under “Centrifugal Water Chillers” and apply as appropriate.

5.3. Access

a. See requirements listed under “Centrifugal Water Chillers” and apply as appropriate.

5.4. Accessories

a. See requirements listed under “Centrifugal Water Chillers” and apply as appropriate.

5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications

23 65 00 Cooling Towers

1. Forced-Draft Cooling Towers 1.1. Selection & Sizing

a. Approved manufacturers:

• Baltimore Air Coil • Evapco • Marley • Approved equal

b. Based on trend data gathered locally by USC weather station and FMS operations

staff, design wet bulbs in the vicinity of the UPC and HSC campuses have been found to be as high as 76 (degrees F). Where this contradicts with industry guidelines, this shall be used as the a minimum basis for selection of these systems.

c. Tower construction options shall be analyzed including stainless, galvanized, or fiberglass. Any wetted sections of the tower shall be stainless steel

d. Each fan section, that makes up a modular cooling tower system, shall be provided

with a Variable Frequency Drive, where the criteria for providing such is met per criteria found elsewhere within this guideline.

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USC Mechanical Standard Guideline 69 Revised August 2011

e. The piping arrangement for the cooling towers shall be designed such that flow to and from the tower is hydraulically balanced. This is to ensure equal flow distribution to and from each tower cell.

f. Provide an adequately sized equalizer line with valves to permit each lower basin to be

isolated for cleaning.

g. Condenser water pumps shall be dedicated to each chiller that make-up the chilled water plant. Manual cross over valves shall be provided so as to allow each pump to serve as a backup to other system pumps, and support any chiller in overall system..

h. A sweeper system including pumps, filtration, piping and nozzles shall be engineered

and furnished by the tower manufacture for the specific application.

i. Coordination of cooling tower basin sweeper / filter system and the proposed pipe distribution / placement of nozzles within the cooling tower basin, shall be done so along with the manufacturer representatives of both systems. Please submit proposed shop drawings of proposed basin pipe distribution for review by FMS.

j. Specify electronic basin level control and capability for monitoring, instead of traditional local float control.

k. Provide water meter to measure makeup water usage and tower drainage / bleed-off

to / from the cooling tower.

l. Tower shall be supplied with a vibration cut out switch, and tied into local fan control equipment. Provisions shall be provided so this point is monitored by BMS.

m. Internal and External walkways and service platforms to ensure proper maintenance

access.

n. Tower manufacturer shall provide sound level data for analysis by an acoustical engineer. The design team must present the analysis must to FMS for review prior to design being completed.

o. The design team must present screening strategy, and address any line of sight issues

anticipated with proposed location and final anticipated installed height.

1.2. Construction

a. Appropriate internal or external ladders and guard rail factory manufactured

accessories shall be specified along with these systems.

1.3. Access 1.4. Accessories 1.5. Related Documents

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USC Mechanical Standard Guideline 70 Revised August 2011

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Natural-Draft Cooling Towers

2.1. Selection & Sizing

a. Approved manufacturers:

• Baltimore Air Coil • Evapco • Marley • Approved equal

b. Based on trend data gathered locally by USC weather station and FMS operations

staff, design wet bulbs in the vicinity of the UPC and HSC campuses have been found to be as high as 76 (degrees F). Where this contradicts with industry guidelines, this shall be used as the a minimum basis for selection of these systems.

c. Tower construction options shall be analyzed including stainless, galvanized, or fiberglass. Any wetted sections of the tower shall be stainless steel

d. Each fan section, that makes up a modular cooling tower system, shall be provided

with a Variable Frequency Drive, where the criteria for providing such is met per criteria found elsewhere within this guideline.

e. The piping arrangement for the cooling towers shall be designed such that flow to and

from the tower is hydraulically balanced. This is to ensure equal flow distribution to and from each tower cell.

f. Provide an adequately sized equalizer line with valves to permit each lower basin to be

isolated for cleaning.

g. Condenser water pumps shall be dedicated to each chiller that make-up the chilled water plant. Manual cross over valves shall be provided so as to allow each pump to serve as a backup to other system pumps, and support any chiller in overall system..

h. A sweeper system including pumps, filtration, piping and nozzles shall be engineered

and furnished by the tower manufacture for the specific application.

i. Coordination of cooling tower basin sweeper / filter system and the proposed pipe distribution / placement of nozzles within the cooling tower basin, shall be done so along with the manufacturer representatives of both systems. Please submit proposed shop drawings of proposed basin pipe distribution for review by FMS.

j. Specify electronic basin level control and capability for monitoring, instead of traditional local float control.

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USC Mechanical Standard Guideline 71 Revised August 2011

k. Provide water meter to measure makeup water usage and tower drainage / bleed-off to / from the cooling tower.

l. Tower shall be supplied with a vibration cut out switch, and tied into local fan control

equipment. Provisions shall be provided so this point is monitored by BMS.

m. Internal and External walkways and service platforms to ensure proper maintenance access.

n. Tower manufacturer shall provide sound level data for analysis by an acoustical engineer. The design team must present the analysis must to FMS for review prior to design being completed.

o. The design team must present screening strategy, and address any line of sight issues

anticipated with proposed location and final anticipated installed height.

2.2. Construction

b. Appropriate internal or external ladders and guard rail factory manufactured

accessories shall be specified along with these systems.

2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Field-Erected Cooling Towers

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Liquid Coolers

4.1. Selection & Sizing

a. NOT ALLOWED FOR CENTRAL BUILDING SYSTEM HVAC PURPOSE

4.2. Construction 4.3. Access

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USC Mechanical Standard Guideline 72 Revised August 2011

4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 70 00 CENTRAL HVAC EQUIPMENT

23 71 00 Thermal Storage

1. Thermal Heat Storage 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Chilled-Water Thermal Storage 2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Ice Storage 3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 72 00 Air-to-Air Energy Recovery Equipment

1. Heat-Wheel Air-to-Air Energy-Recovery Equipment 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences

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USC Mechanical Standard Guideline 73 Revised August 2011

• Specifications:

2. Heat-Pipe Air-to-Air Energy-Recovery Equipment 2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Fixed-Plate Air-to-Air Energy-Recovery Equipment

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Packaged Air-to-Air Energy-Recovery Units

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 73 00 Indoor Central-Station Air-Handling Units

1. Modular Indoor Central-Station Air-Handling Units 1.1. Selection & Sizing

a. Not allowed for institutional buildings, please refer to “Custom Indoor Central Station

Air Handling Units” for requirements associated with acceptable air handlers.

1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

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USC Mechanical Standard Guideline 74 Revised August 2011

2. Custom Indoor Central-Station Air-Handling Units

2.1. Selection & Sizing

a. The following parameters are to be used when connecting to the UPC (University Park

Campus) chilled water loop which utilizes a TES storage tank. Please see mechanical wet-side guidelines for requirements.

b. For large AHU’s, the unit shall be configured in a blow-thru design, with the fan upstream of the cooling coil to trap fan heat and reduce over-dehumidification and the added loads associated with over-dehumidification.

c. Air handling units shall be specified to maintain a maximum of 450 FPM (feet per

minute) air velocity across cooling coils, in or to allow for growth and avoid carry over of condensate.

d. Air handling units that require 50 GPM or more chilled water, shall have a pressure

independent control valve with integral flow limiting capabilities.

• Approved manufacturer i. Delta P. ii. Approved equal

2.2. Construction

a. Cooling and heating coils shall be of aluminum fin and copper tube construction.

Aluminum material stock shall be coated with a polyester product before the fabrication of coil fins.

b. Provide double pitched stainless steel insulated condensate drain pans for cooling

coils.

2.3. Access

a. In mechanical rooms, locate air-handling units so that clearances at access doors are maintained.

b. If air-handling units are located over a ceiling, access shall be provided to all motors, fans, filters, and electrical / controls accessories.

c. Air-handlings units shall be provided with access panels to all motors, fans, filters,

electrical and controls accessories / panels.

2.4. Accessories

a. For air-handling units, 90% high efficiency filters shall be upstream of cooling and heating coils.

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USC Mechanical Standard Guideline 75 Revised August 2011

b. Air handling units shall be specified with gasketted integral filter frames that allow for front loading of filters, as oppose to side loading.

c. Air-handling units shall be connected to the campus EMS system for monitoring. Coordinate with campus controls vendor (Honeywell/ Mark Spangler (714) 562-3163) for tenant improvements to existing University campus buildings.

2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Indoor Indirect Fuel-Fired Heating and Ventilating Units

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Indoor, Direct Gas-Fired Heating and Ventilating Units

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 74 00 Packaged Outdoor HVAC Equipment

1. Packaged, Outdoor, Central-Station Air-Handling Units 1.1. Selection & Sizing

a. Not allowed for institutional buildings, please refer to “Custom Indoor Central Station

Air Handling Units” for requirements associated with acceptable air handlers.

1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

Page 76: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 76 Revised August 2011

2. Packaged, Outdoor, Heating-Only Makeup-Air Units

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Packaged, Outdoor, Heating and Cooling Makeup Air-Conditioners

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 75 00 Custom-Packaged Outdoor HVAC Equipment

1. Custom-Packaged, Outdoor, Central-Station Air-Handling Units

1.1. Selection & Sizing

a. Not allowed for institutional buildings, please refer to “Custom Indoor Central Station

Air Handling Units” for requirements associated with acceptable air handlers.

b. Proper construction requirements shall be included for “Custom Central Station Air Handling Units” that are to be located outdoors.

1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Custom-Packaged, Outdoor, Heating and Ventilating Makeup-Air Units

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details

Page 77: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 77 Revised August 2011

• Control Diagrams & Sequences • Specifications:

3. Custom-Packaged, Outdoor, Heating and Cooling Makeup Air-Conditioners

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 76 00 Evaporative Air-Cooling Equipment

1. Direct Evaporative Air Coolers

2. Indirect Evaporative Air Coolers

3. Combined Direct and Indirect Evaporative Air Coolers

23 80 00 DECENTRALIZED HVAC EQUIPMENT 23 81 00 Decentralized Unitary HVAC Equipment

1. Packaged Terminal Air-Conditioners 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Room Air-Conditioners

2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Self-Contained Air-Conditioners

3.1. Selection & Sizing 3.2. Construction

Page 78: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 78 Revised August 2011

3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Computer-Room Air-Conditioners

4.1. Selection & Sizing

a. Units shall be located to optimize air distribution in the server room and to create an

appropriate “hot aisle / cold aisle” configuration (as appropriate and space allows).

b. Please contact USC CCD project manager to confirm end user equipment heat loads and quantities.

c. Please account for 15% growth (heat load ) when determining the cooling capacity

4.2. Construction 4.3. Access 4.4. Accessories

a. For raised floor applications, provide seismic floor stand and turning vane for down-

flow units. Provide duct collar on top of the unit for connection to return air plenum.

b. For non-raised floor applications and no overheard air distribution, provide plenum with grille for up-flow units

c. Units shall be provided with steam humidifier and electrical reheat unless otherwise

told.

d. Provide factory furnished condensate pump if necessary. Please confirm if power to pump is integral or separate from AC unit.

e. Provide advanced graphic microprocessor.

f. Units shall be connected to the campus EMS system for monitoring. Coordinate with

campus controls vendor (Honeywell/ Mark Spangler) (714) 562-3163

4.5. Related Documents • Installation Details • Control Diagrams & Sequences • Specifications:

5. Split-System Air-Conditioners

5.1. Selection & Sizing

Page 79: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 79 Revised August 2011

a. Cooling system must be available year-round (24 hours operation) for telephone

rooms, elevator equipment rooms, and electrical rooms with transformers.

b. DX systems are acceptable, if chilled water not available. If building connected onto central campus chilled water utility, it shall be assumed chilled water is not available 24 hours a day / 7 days a week.

c. Based on level of temperature control required, and the importance of equipment to be

housed, consideration shall be given as to whether chilled water is more appropriate than DX type systems.

d. Any areas requiring humidity control shall defer to requirements for “Computer Room

Air Conditioners”.

e. Provide head pressure controls to allow for stable unit operation at low load conditions.

f. If spaces and equipment housed within is critical in nature, these systems shall be connected onto the stand-by leg of the emergency generator (as available).

g. Acceptable manufacturers:

• Carrier • Trane • York • Approved equal

5.2. Construction 5.3. Access 5.4. Accessories 5.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Air-Source Unitary Heat Pumps

6.1. Selection & Sizing 6.2. Construction 6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

7. Water-Source Unitary Heat Pumps

7.1. Selection & Sizing

Page 80: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 80 Revised August 2011

a. These systems are not allowed for campus buildings, and shall not be considered

acceptable central HVAC strategy.

7.2. Construction 7.3. Access 7.4. Accessories 7.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 82 00 Convection Heating and Cooling Units

1. Valance Heating and Cooling Units 1.1. Selection & Sizing 1.2. Construction 1.3. Access 1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

2. Air Coils

2.1. Selection & Sizing

a. Cooling Coil Criteria (for buildings connected onto campus central chilled water utility)

• Re-circulating System – Variable Volume VAV System Design

i. Minimum cooling coil depth in rows: 8 ii. Maximum finned area coil face velocity: 400 FPM iii. Minimum fins per inch: 12 FPI iv. Maximum fins per inch: 12 FPI v. Maximum air pressure drop: 0.75” vi. Design inlet water temperature: 45°F vii. Design leaving water temperature: 65°F viii. Minimum chilled water temperature differential: 15 °F (65-50) ix. Maximum supply air temperature leaving the coil 55°F x. Minimum water pressure drop at 15°F temperature differential: 7’ xi. Maximum water pressure drop at 15°F temperature differential: 12’ xii. Coil circuiting: typically one-half to 2/3 circuiting will provide the

desired conditions

• Re-circulating System – Constant Volume (CAV) System Design

Page 81: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 81 Revised August 2011

i. Minimum cooling coil depth in rows: 8 ii. Maximum finned area coil face velocity: 300 FPM iii. Minimum fins per inch: 12 FPI iv. Maximum fins per inch: 12 FPI v. Maximum air pressure drop: 0.65” vi. Design inlet water temperature: 45°F vii. Design leaving water temperature: 65°F viii. Maximum supply air temperature leaving the coil 55°F ix. Minimum chilled water temperature differential: 15°F (65-50) x. Minimum water pressure drop at 15°F temperature differential: 7’ xi. Maximum water pressure drop at 15°F temperature differential: 12’ xii. Coil circuiting: typically one-half to 2/3 circuiting will provide the

desired conditions

• Greater than 50% OSA – VAV System Design

i. Minimum cooling coil depth in rows: 10 ii. Maximum finned area coil face velocity: 300 FPM iii. Minimum fins per inch: 12 FPI iv. Maximum fins per inch: 12 FPI v. Maximum air pressure drop: 0.75” vi. Design inlet water temperature: 45°F vii. Design leaving water temperature: 65°F viii. Maximum supply air temperature leaving the coil 55°F ix. Minimum chilled water temperature differential: 15°F (65-50) x. Minimum water pressure drop at 15°F temperature differential: 7’ xi. Maximum water pressure drop at 15°F temperature differential: 12’ xii. Coil circuiting: typically one-half to 2/3 circuiting will provide the

desired conditions

• Greater than 50% OSA – CAV System Design

xiii. Minimum cooling coil depth in rows: 10 xiv. Maximum finned area coil face velocity: 300 FPM xv. Minimum fins per inch: 12 FPI xvi. Maximum fins per inch: 12 FPI xvii. Maximum air pressure drop: 0.75” xviii. Design inlet water temperature: 45°F xix. Design leaving water temperature: 65°F xx. Maximum supply air temperature leaving the coil 55°F xxi. Minimum chilled water temperature differential: 15°F (65-50) xxii. Minimum water pressure drop at 15°F temperature differential: 7’ xxiii. Maximum water pressure drop at 15°F temperature differential: 12’ xxiv. Coil circuiting: typically one-half to 2/3 circuiting will provide the

desired conditions

b. Heating Coil Criteria

Page 82: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 82 Revised August 2011

c. Coils for centralized and de-centralized HVAC systems shall be provided with flow limiting devices for water balance of these individual circuits. • Flow limiting devices can be incorporated into circuit control valves or shall

otherwise be of pressure independent type.

2.2. Construction

a. Where applicable, cooling coils for centralized HVAC systems shall be constructed of aluminum fins and copper tubes with stainless steel casings

b. Where applicable, cooling coils for de-centralized HVAC systems shall be constructed of aluminum fins and copper tubes with stainless steel casings

2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications

3. Fan Coil Units

3.1. Selection & Sizing

a. Locate fan coil units in accessible areas (ceiling grid). If a fan coil unit needs to be

located over hard gypsum ceiling, a 24”x24”minimum access panel shall be provided for access. Coordinate location of access panel with architect.

b. The cooling leaving air temperature shall be designed for 55°F leaving air temperature from the unit.

c. To reduce the dehumidification load at the fan coil units, and improve overall system

chilled water temperature differential, provide a fresh air fan(s) equipped with heating and cooling coils. The fresh air fan cooling and heating coils shall be selected per the design criteria described elsewhere in this document, and designed to maintain 55°F fresh air supply temperature to the inlet of the fan coil units. Please review with USC Engineering Services prior to design.

d. Maximum fan coil size using this criteria is 2,000 CFM. Above 2,500 CFM, utilize the AHU cooling coil design criteria, which is more stringent.

e. It is preferable that the fan coil meet all cooling and heating loads at the design criteria

described in this document operate at medium fan speed setting maximum. If there are only low and high fan speed options, the selection of the coils shall be made with low fan speed.

f. Direct drive shall typically be used for nominal CFM selections of up to 1200 CFM (3

Tons).Some manufacturers may have direct drive fan coils in larger selections.

Page 83: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 83 Revised August 2011

3.2. Construction

a. Fan coils shall be blow thru, with the coil located downstream of the fan to trap fan

heat.

b. The fan coils shall be direct drive, if offered as a standard product size.

c. Please see mechanical wet-side guidelines for requirements for the cooling and/or heating coils.

3.3. Access

a. Fan coil units shall be provided with access panels to all motors, fans, filters, and

controls.

3.4. Accessories

a. For fan coil units, 30% efficient throwaway filters shall be upstream of cooling and heating coils.

b. Fan coil units shall be connected to the campus EMS system for monitoring. Coordinate with campus controls vendor (Honeywell/ Mark Spangler (714) 562-3163 for requirements.

c. Fan coil units shall be provided with flow limiting devices for water balance.

3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

4. Unit Ventilators

4.1. Selection & Sizing 4.2. Construction 4.3. Access 4.4. Accessories 4.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

5. Induction Units

5.1. Selection & Sizing 5.2. Construction 5.3. Access 5.4. Accessories 5.5. Related Documents

Page 84: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 84 Revised August 2011

• Installation Details • Control Diagrams & Sequences • Specifications:

6. Radiators

6.1. Selection & Sizing 6.2. Construction 6.3. Access 6.4. Accessories 6.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

7. Convectors

7.1. Selection & Sizing 7.2. Construction 7.3. Access 7.4. Accessories 7.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

8. Finned-Tube Radiation Heaters

8.1. Selection & Sizing 8.2. Construction 8.3. Access 8.4. Accessories 8.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

9. Unit Heaters

9.1. Selection & Sizing 9.2. Construction 9.3. Access 9.4. Accessories 9.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 83 00 Radiant Heating Units

1. Radiant-Heating Electric Cables

Page 85: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 85 Revised August 2011

2. Radiant-Heating Hydronic Piping

3. Radiant-Heating Electric Panels

4. Electric Radiant Heaters 23 84 00 Humidity Control Equipment

1. Humidifiers 1.1. Selection & Sizing

a. Do not use humidifiers except where specifically required to meet narrow relative

humidity space conditions, as dictated by proposed space function.

b. Where possible, place the space humidity sensor in return duct if serving multiple

spaces, otherwise provisions for multiple space sensors that can be referenced for overall control, can be provided.

c. Where possible, provide humidification in the main supply duct or within the air

handling units.

d. Provide a controlling high limit humidity sensor in supply duct to over ride the signal to the humidifier valve and limit supply air humidity at its duct location to a maximum 80% RH. Locate a high limit humidity switch in the event the supply air humidity exceeds 90% RH.

e. Individual space humidifiers are discouraged unless not practical to provide central

humidification systems.

f. Locate humidifiers a minimum of 15 feet upstream of final filters.

g. Acceptable Manufacturer:

i. Armstrong, ii. Dristeam iii. Approved equal.

1.2. Construction 1.3. Access

a. Provide Plexiglas view ports in AHU/ductwork at humidifiers to observe operation.

1.4. Accessories 1.5. Related Documents

• Installation Details • Control Diagrams & Sequences

Page 86: Mechanical_StandardGuidelines Specs References

USC Mechanical Standard Guideline 86 Revised August 2011

• Specifications:

2. Dehumidifiers 2.1. Selection & Sizing 2.2. Construction 2.3. Access 2.4. Accessories 2.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

3. Indoor Pool and Ice-Rink Dehumidification Units

3.1. Selection & Sizing 3.2. Construction 3.3. Access 3.4. Accessories 3.5. Related Documents

• Installation Details • Control Diagrams & Sequences • Specifications:

23 90 00 Unassigned