mechanical specification

MECHANICAL SERVICES DESIGN AND CONSTRUCT SPECIFICATION for CARRINGTON GATEWAY HOUSING 90 WEROMBI ROAD, GRASMERE

Prepared by: SHELMERDINES Consulting Engineers ABN: 40 003 331 879 55 Hume Street Crows Nest NSW 2065 Telephone: 9436 3021 Facsimile: 9439 8709 Email: [email protected] Architect: JACKSON TEECE ARCHITECTURE Lot 1, Pier 8-9, 23 Hickson Road WALSH BAY NSW 2000 Telephone: 9290 2722 Facsimile: 9290 1150 Tender Issue 20 May 2014 Job No. 6249MSP

SECTION M MECHANICAL SERVICES

TABLE OF CONTENTS M1 GENERAL ........................................... ................................................................................................... 1

M1.1 OUTLINE DESCRIPTION ............................................................................................................... 1 M1.2 DESIGN AND CONSTRUCTION RESPONSIBILITIES .................................................................. 1 M1.3 NOTICE TO TENDERERS ............................................................................................................. 2 M1.4 STANDARDS, RULES AND REGULATIONS ................................................................................ 2 M1.5 TENDER DOCUMENTS ................................................................................................................. 3 M1.6 SHOP DRAWINGS ......................................................................................................................... 3 M1.7 AS-INSTALLED DRAWINGS .......................................................................................................... 4 M1.8 OPERATING AND MAINTENANCE INSTRUCTIONS ................................................................... 4 M1.9 SETTING OUT ................................................................................................................................ 5 M1.10 INSTRUCTING PLANT OPERATORS ........................................................................................... 5 M1.11 MATERIALS AND WORKMANSHIP ............................................................................................... 5 M1.12 SAMPLES AND TECHNICAL SUBMISSIONS ............................................................................... 5 M1.13 ALTERNATIVES ............................................................................................................................. 5 M1.14 PERFORMANCE GUARANTEE ..................................................................................................... 6 M1.15 WARRANTY .................................................................................................................................... 6 M1.16 DEFECTS LIABILITY ...................................................................................................................... 6 M1.17 MAINTENANCE SERVICE CONTRACT ........................................................................................ 6 M1.18 INTERPRETATION ......................................................................................................................... 6 M1.19 PROTECTION OF PLANT AND MATERIALS ................................................................................ 6

M2 EXTENT OF WORK AND GENERAL REQUIREMENTS ........... .......................................................... 8

M2.1 EXTENT OF WORK ........................................................................................................................ 8 M2.2 WORKS BY OTHER TRADES ........................................................................................................ 9 M2.3 AIR CONDITIONING SYSTEM DESIGN CONDITIONS ................................................................ 9 M2.4 SYSTEM PERFORMANCE GUARANTEE ................................................................................... 11 M2.5 SYSTEM RESISTANCES ............................................................................................................. 11 M2.6 FIXINGS ........................................................................................................................................ 11 M2.7 BEARINGS AND LUBRICATION .................................................................................................. 11 M2.8 LABELS AND IDENTIFICATION .................................................................................................. 11 M2.9 NOISE AND VIBRATION .............................................................................................................. 12 M2.10 PAINTING ..................................................................................................................................... 12 M2.11 COORDINATION .......................................................................................................................... 13

M3 MAJOR EQUIPMENT ................................... ....................................................................................... 14

M3.1 GENERAL ..................................................................................................................................... 14 M3.2 QUALITY ....................................................................................................................................... 14 M3.3 AIR CONDITIONING EQUIPMENT .............................................................................................. 14 M3.4 CONDENSING UNITS .................................................................................................................. 15 M3.5 FAN COIL UNITS .......................................................................................................................... 15 M3.6 AIR CONDITIONING SYSTEMS .................................................................................................. 15 M3.7 AIR FILTERS ................................................................................................................................. 16

M4 DUCTWORK AND ACCESSORIES .......................... .......................................................................... 18

M4.1 STANDARD ................................................................................................................................... 18 M4.2 SAMPLES ..................................................................................................................................... 18 M4.3 CONTRACTOR'S SUBMISSIONS ................................................................................................ 18 M4.4 SHEET METAL ............................................................................................................................. 18 M4.5 STANDARDS OF SHEET METAL DUCTWORK CONSTRUCTION ........................................... 18 M4.6 SUPPORT BRACKETS ................................................................................................................ 19 M4.7 FLEXIBLE CONNECTIONS .......................................................................................................... 19 M4.8 INSTALLATION ............................................................................................................................. 19 M4.9 VOLUME CONTROL DAMPERS .................................................................................................. 20 M4.10 ACCESS PANELS ........................................................................................................................ 21 M4.11 FLEXIBLE SUPPLY AND RETURN AIR DUCTWORK ................................................................ 21 M4.12 AIR DISTRIBUTION DEVICES ..................................................................................................... 21 M4.13 DUCTWORK CLEANSING ........................................................................................................... 22


M5 REFRIGERATION ................................................................................................................................ 24

M5.1 GENERAL ..................................................................................................................................... 24 M5.2 QUALITY ....................................................................................................................................... 24 M5.3 PIPING .......................................................................................................................................... 24 M5.4 PIPES AND FITTINGS .................................................................................................................. 24 M5.5 PIPING INSTALLATION ............................................................................................................... 25 M5.6 COMPLETION ............................................................................................................................... 26

M6 INSULATION ........................................ ................................................................................................ 27

M6.1 EXTENT ........................................................................................................................................ 27 M6.2 INTERPRETATIONS .................................................................................................................... 27 M6.3 PRE-COMPLETION TESTS ......................................................................................................... 27 M6.4 DUCTWORK INSULATION MATERIALS ..................................................................................... 27 M6.5 MECHANICAL FIXING OF DUCTWORK INSULATION ............................................................... 28 M6.6 DUCTWORK INTERNAL INSULATION........................................................................................ 29 M6.7 PIPING INSULATION ................................................................................................................... 29

M7 ASSOCIATED ELECTRICAL WORKS ....................... ........................................................................ 31

M7.1 DESCRIPTION .............................................................................................................................. 31 M7.2 REGULATIONS ............................................................................................................................. 31 M7.3 BALANCE OF LOAD ..................................................................................................................... 31 M7.4 COLOUR CODE AND IDENTIFICATION ..................................................................................... 31 M7.5 EARTHING .................................................................................................................................... 32 M7.6 WIRING METHODS ...................................................................................................................... 32 M7.7 PVC INSULATED CABLES .......................................................................................................... 32 M7.8 CABLE TRAYS .............................................................................................................................. 32 M7.9 CONDUIT ...................................................................................................................................... 33 M7.10 CABLE TROUGHING ................................................................................................................... 33 M7.11 TESTING ....................................................................................................................................... 34

M8 AUTOMATIC CONTROLS ................................ ................................................................................... 35

M8.1 CROSS REFERENCES ................................................................................................................ 35 M8.2 STANDARD ................................................................................................................................... 35 M8.3 GENERAL ..................................................................................................................................... 35 M8.4 CONTROL EQUIPMENT .............................................................................................................. 35 M8.5 FUNCTIONS AND NORMAL OPERATING SEQUENCES .......................................................... 35

M9 COMPLETION ...................................................................................................................................... 37

M9.1 COMMISSIONING ........................................................................................................................ 37 M9.2 AIR BALANCING........................................................................................................................... 37 M9.3 COMPLETION TESTS .................................................................................................................. 37 M9.4 ACCEPTANCE TESTING ............................................................................................................. 37 M9.5 ROOM CONDITIONS ................................................................................................................... 37 M9.6 CLEANING .................................................................................................................................... 38 M9.7 MAINTENANCE ............................................................................................................................ 38 SCHEDULE OF PRICES ............................................................................................................................. 39 SCHEDULE OF TECHNICAL PARTICULARS ........................................................................................... 40

Revision Table

Revision Date Description

P1 17.04.2014 Preliminary Issue

A 20.05.2014 Tender Issue


Carrington Gateway Housing M.1 20 May 2014 Shelmerdines Consulting Engineers 6249MSP–Tender Issue

M1 GENERAL

M1.1 OUTLINE DESCRIPTION The work includes but is not limited to the following:

• Air conditioning of ILUs via air-cooled, reverse cycle, ducted, split units providing day/night zoned control arrangement

• Discharge Bathroom and Ensuite fan/heat/light unit to outside. Fan/heat/light unit by electrical trade.

• Discharge kitchen rangehoods to outside

• Laundries shall be naturally ventilated

The contract includes the provision of all materials, labour, cartage, freight, tools, plant, appliances and all other works necessary, though not specifically mentioned, to the true intent and meaning of this specification and the accompanying drawings, to the entire satisfaction of the Superintendent.

M1.2 DESIGN AND CONSTRUCTION RESPONSIBILITIES The Contractor shall assume full responsibility for the design, supply, installation and performance of the Mechanical Services in accordance with the criteria set out in this specification.

The design shall be carried out by a professionally qualified and suitably experienced design engineer. (Provide details of proposed Engineer with tender.)

The design and installation shall be in accordance with recognised good practices and shall conform to the minimum requirements of this specification, or if not covered by this specification, by the relevant sections of NATSPEC.

The Contractor’s design and construction responsibilities shall include, but not be limited to, the following:

• It shall be the Contractor’s responsibility to allow for all work in accordance with the statutory authorities and the Building Surveyor. The Contractor shall prepare and submit services drawings for approval, undertake any necessary negotiations and modify designs as requested in order to conform with regulatory requirements.

• The Contractor shall provide the other trade contractors with all information necessary for them to accurately assess and size each of the respective sub-systems. For example, electrical load information shall be provided by the mechanical contractor to the electrical contractor in order to allow the electrical contractor to size all the required submains and circuit protection.

• The design and performance of all systems shall be confirmed after the final design and selection of the components. This will include functional design, spatial allowances and servicing access requirements.

• The Contractor shall submit for approval all plant capacity calculations including thermal load calculations.

• The Contractor shall ensure the working pressure ratings for all pumps, pipework, valves, fittings, pressure vessels, air conditioning units, equipment, etc, are suitable for the proposed application.

• The final design shall incorporate the requirements of thermal expansion, anchorage and restraint.

• The design shall take into account acoustic requirements including any modifications to equipment to meet the noise criteria specified. This shall be based on all equipment running in normal mode.

• The location of all plant access requirements shall be identified on the shop drawings.

• The location of all sensors, detectors, thermostats, etc shall be identified on the shop drawings. It shall be the Contractor’s responsibility to assess the location of each sensing device and to confirm their most appropriate location, taking into account functional equipment and architectural requirements.



• The Contractor shall satisfy himself that the work within his Contract does not adversely affect other trade contractors.

• The Contractor shall undertake a physical review of all spaces in which mechanical plant, ducts, pipes, etc are to be installed to ensure that the intended equipment can be accommodated.

• The Contractor shall thoroughly co-ordinate the Mechanical Services work with the architectural design and building works and the work of all other Subcontractors.

The specification and drawings are intended to generally depict the overall approach and the general scope of work in a typical, generic or diagrammatic manner and do not purport to represent the entire work required.

Where information on equipment capacities, air flows, duct sizes, etc is stated, this information is to be regarded as indicative only. Such information is intended to indicate minimum sizes or capacities.

It is the Contractor’s responsibility to undertake the design of all aspects of the mechanical Services and should capacities, as assessed by the Contractor need to be higher than indicated, in order to achieve the design criteria, the required equipment shall be provided at no increase to the accepted contract sum.

M1.3 NOTICE TO TENDERERS Tenderers will be required to complete the Schedule of Prices and Schedule of Technical Data to allow the proper assessment of the tender submission.

M1.4 STANDARDS, RULES AND REGULATIONS The services installation covered by this contract, shall be complete with all equipment necessary for their satisfactory operation, control, maintenance and safety under all normal conditions of service. The design and installation shall comply in every aspect with the Regulations and By-Laws of all Authorities have jurisdiction, including the Building Code of Australia, any relevant fire safety engineering report, any relevant Australian Standard and any relevant condition of the Development Consent.

In particular the design is to comply with the following:

- The BASIX report

- Australian Standards:

∗ Mechanical ventilation and air conditioning: To AS 1668.1 and AS 1668.2, as required by the Building Code of Australia.

∗ Microbial control: To AS/NZS 3666.1.

∗ Electrical work: To AS 3000.

∗ Degree of protection: To AS 1939.

∗ Water supply: To AS 3500.1.

∗ Plumbing and drainage: To AS/NZS 3500.2.2.

- Building Code of Australia:

∗ Section E, Part E2.2.

∗ Section F, Clause NSW F4.5 (b), F4.12

∗ Section J, Parts J3.5, J5.2, J5.3, J5.4, J5.5.

∗ The locations of all time switches, temperature sensors, outside air dampers, diffusers and similar control devices will be designed to enable accessibility in accordance with NSW Clause J8–2 of the BCA 2007.



- Camden Council Development Consent No. 1185/2012:

∗ Section 6.0

(1) Residential Air Conditioning Units – The operation of the approved air conditioning units must operate at all times so:

a) as to be inaudible in a habitable room during the hours of 10.00pm to 7.00am on weekdays and 10.00pm to 8.00am on weekends and public holidays; and

b) as to emit a sound pressure level when measured at the boundary of any other residential property, at a time other than those specified in a) above, which exceeds the background (LA90, 15 minutes) by more than 5dB(A). The source noise level must be measured as a LAeq 15 minute.

c) as not to discharge ant condensate or moisture onto the ground surface of the premises or into stormwater drainage system in contravention of the requirements of the Protection of the Environment Operations Act, 1997.

(3) Plant Noise Restriction – The level of total continuous noise emanating from operation of all the plant or processes in all buildings (LAeq)(measured for at least 15 minutes), the above premises must not exceed the relevant criteria contained within Councils “Environmental Noise Policy” when measured at any point on the boundary.

The Contractor shall obtain and fill in all notices required by the various authorities when necessary and pay all fees in connection therewith and shall submit for approval all necessary drawings and obtain all consents required to permit execution of the works.

The Contractor shall provide all necessary design and installation certification to the Building Code of Australia, to enable occupancy of the Building prior to practical completion.

Carry out all works strictly in accordance with the requirements of any properly constituted Authority having jurisdiction over the works, except where this Specification lays down standards and methods of work over and above such requirements.

Submit all drawings, details, notices and obtain approvals where required by the various Authorities and pay all fees in connection therewith.

M1.5 TENDER DOCUMENTS Diagrammatic Drawings The drawings as scheduled are issued as a guide only and shall be considered to be diagrammatic and approximate. The drawings and specification are intended to be mutually explanatory and complete, but all work called for by one, even if not by the other, shall be fully executed. Should the documents be in conflict, the Building Contractor will be deemed to have included for the larger quantity and/or the more expensive components(s), as applicable.

M1.6 SHOP DRAWINGS Requirement The Mechanical Subcontractor shall be responsible for the preparation of all necessary co-ordinated manufacturing and installation shop drawings covering the services included under this contract. The Mechanical Subcontractor shall confirm final installation dimensions by site measurement, to ensure satisfactory set out and co-ordination with the structure and new or existing services.

Shop drawings shall be prepared electronically in a format compatible with AutoCAD 2004.

All shop drawings shall be submitted in paper print form. Shop drawings shall be submitted to the Superintendents Representative. Manufacture and/or installation as applicable shall not be commenced prior to the Mechanical Consultant's review of the drawings. The Mechanical Consultant shall not be regarded as the Mechanical Subcontractor's checking agents. Review of shop drawings will be given in principle only and without prejudice to the responsibility of the Mechanical Subcontractor for the proper co-ordination, installation and operation of the services.

The preparation of shop drawings shall be scheduled to enable a review to be gained and for the Mechanical Subcontractor to comply with his programme for installation of the services. Delays caused by late submission, incorrectness or inadequacy of shop drawings will not be recognised



as a reason for variations to the subcontract time or contract sum. Allow a minimum of 2 weeks for approval of shop drawings.

Copies of shop drawings shall be submitted to the appropriate authorities as necessary for their approval.

M1.7 AS-INSTALLED DRAWINGS Requirement On completion of the works, and two weeks prior to the issue of the Notice of Practical Completion, the Contractor shall supply one (1) set of paper print drawings for checking by the Mechanical Consultant. Three (3) set of approved paper print drawings and one (1) set of drawing files on computer compact disc compatible with Autocad 2004 showing the complete services installation, as-installed, shall be included in the Operating and Maintenance Manuals.

In order to achieve accurate drawings, all relevant information relating to the contract works shall be entered onto drawing prints immediately it has been carried out. The "as-installed" drawings shall appear "as new". No previous approval stamps, hand written notes or erase markings shall be evident. New drawings shall be provided if necessary. The preparation of the drawings shall proceed during the installation of the works as each section is completed. To ensure these requirements, the Consulting Engineer shall be allowed to inspect the drawings on request.

The information shown on prints and final records shall be actually physically measured from permanent building boundaries or other permanent features and accurate distances shall be shown where deemed necessary by the Architect.

M1.8 OPERATING AND MAINTENANCE INSTRUCTIONS Requirement Provide comprehensive service manuals in the form of loose leaf hard back folios incorporating:

a) Index of contents.

b) Definition of terms.

c) Outline description of engineering services, including approved drawings of all services.

d) Commissioning information including air balancing readings for air conditioning and ventilation systems.

e) Manufacturers' service manuals.

f) Manufacturers' spare parts lists.

g) Manufacturers' spares ordering instructions.

h) Operational routines.

i) As-installed mechanical services drawings.

j) As-installed line diagrams (mechanical and electrical) including a comprehensive wiring diagram of each control system.

k) Schedules of electrical equipment including full technical data, performance characteristics and construction details of the equipment and components as well as dimensions, operating loads etc.

l) Schedules of mechanical equipment and fittings including technical data and construction details of the equipment and components as well as dimensions, operating loads etc.

m) Details of the planned preventive maintenance procedures.

n) Details of emergency measures including a fault finding guide to assist the maintenance engineer in the rectification of minor operation breakdowns.

o) Users handbook.

p) Name of firm, postal address and telephone number (including after-hours telephone number) of specialist service contractors.

Copies Provide three (3) copies of Service Manuals.



Prototype copy Provide a prototype copy direct to the consultant for approval 2 weeks prior for practical completion. Refer also to Preliminaries.

M1.9 SETTING OUT The routes shown on the drawings indicate the approximate position of plant, machinery, equipment, fittings, switchboards, outlets and accessories included in the Works and also the general run of the services to same; the exact location of same shall be to the approval and/or direction of the Superintendent.

The works shall be set out in adherence with the following directions:

• Adequate space shall be provided for access to all plant, machinery and equipment to facilitate operation, overhaul, repair and removal of same without dismantling an extensive amount of any other part of the Works.

• Services run in false ceilings, in roof spaces and under ground floors shall be arranged adjacent to and horizontally parallel with each other and with adequate spacing of at least 50 mm between pipes and/or insulation. Clearances between pipes and electric cables shall be not less than that prescribed by the SAA Wiring Rules.

M1.10 INSTRUCTING PLANT OPERATORS Instruct plant operators and/or maintenance personnel and/or such other persons as may be nominated by the Architect in the safe and proper operation, care and maintenance of the plant and demonstrate the operation of any special purpose plant requiring a skilled or certified operator.

M1.11 MATERIALS AND WORKMANSHIP Unless indicated otherwise the whole of the material used in this work shall be new, of first quality and of approved manufacture and type. All materials shall be to the approval of the Superintendent.

The whole of the workmanship shall be first class, neat and substantial and to the entire satisfaction of the Superintendent.

The installation throughout shall comply in every respect with the various codes published by the Standards Association of Australia together with any additional requirements which may be specified herein.

Supply approved certified fire rating methods for all services through fire rated elements.

M1.12 SAMPLES AND TECHNICAL SUBMISSIONS The Contractor shall submit samples of selected equipment and fittings to be used in the works for approval by the Architect.

Samples of the following equipment shall be submitted for approval:

• All equipment fixing and support brackets

• Air grilles

• Remote control stations (RCS)

• Temperature sensors

• Technical details of the following equipment shall be submitted for review and approval.

• Air conditioning systems and controls.

• Exhaust and supply fans.

M1.13 ALTERNATIVES Generally, Tenderers shall adhere to the types of plant and equipment detailed in the drawings and specification. Where these requirements preclude Tenderers from offering plant of their standard manufacture, alternatives may be submitted for approval.

Unless such alternatives are accepted in writing by the Superintendent, the Subcontractor shall comply with the detailed requirements of the specification.



M1.14 PERFORMANCE GUARANTEE By accepting the contract, the Subcontractor will be deemed to have guaranteed the performance of the installation under normal working conditions for a period of twelve (12) months from the date of practical completion of the works.

Should the installation or any part thereof fail to fulfil the requirements of this specification, performance of the relevant equipment will be corrected by the Subcontractor at his own expense or the equipment will be liable for rejection.

The Subcontractor shall be responsible for the replacement of any portion of the installations so rejected and for all costs incurred thereby, including the costs of any associated works of other trades. The guarantee period for the replaced portion shall then be extended to cover twelve (12) months trouble free performance.

M1.15 WARRANTY Provide for all plant, equipment and materials supplied under this Subcontract twelve (12) months warranty against faulty manufacture, workmanship and/or materials. Rectify and/or replace any portions of the installation which fail under warranty.

Warranty Period Commence as from the date of practical completion or replacement, as applicable. Extend the period in respect of replaced portions only.

M1.16 DEFECTS LIABILITY Rectify all defects in the work due to faulty materials and/or workmanship for a period of twelve (12) months after all work is completed and handed over. Make good such defects immediately on receipt by the Mechanical Subcontractor of advice from the Architect.

Extend by a further 12 months the period to cover any defects discovered during the Defects Liability period which are due to default or negligence of the Mechanical Subcontractor, in the performance or observance of any of his obligations to enable such defects to be made good and to allow the whole work after being made good to be proved satisfactory.

M1.17 MAINTENANCE SERVICE CONTRACT Carry out regular preventative maintenance during the warranty and defects liability period, on a three monthly basis. Carry out maintenance routines to ensure proper operation of the equipment in accordance with the manufacturer's requirements and good practice. Provide all minor miscellaneous materials required in carrying out the works.

M1.18 INTERPRETATION Unless the context otherwise requires, the following definitions apply:

• Supply: “Supply”, “furnish” and similar expressions mean “supply only”.

• Provide: “Provide” and similar expressions mean “supply and install”.

• Approved: “Approved”, “reviewed”, “directed”, rejected”, ”endorsed” and similar expressions mean “approved (reviewed, directed, rejected, endorsed) in writing by the contract administrator”.

• Give notice: “Give notice”, ”submit”, “advise”, “inform” and similar expressions mean “give notice (submit, advise, inform) in writing to the contract administrator”.

• Obtain: “Obtain”, “seek” and similar expressions mean “obtain (seek) in writing from the contract administrator”.

• Proprietary: “Proprietary” mean identifiable by naming manufacturer, supplier, installer, trade name, brand name, catalogue or reference number.

• Samples: Includes samples, prototypes and sample panels.

M1.19 PROTECTION OF PLANT AND MATERIALS The Subcontractor shall be entirely responsible for all apparatus, equipment and appurtenances furnished by him or his Subcontractors in connection with the works.

Special care shall be taken to protect all such goods in a suitable manner.



The protection shall include covers to prevent moisture, grit plaster or other foreign substances from entering the working parts of plant and equipment. Seal and protect all open ends of ductwork, piping and conduit (as applicable) while in storage and during the course of installation and protect adequately all electrical and control equipment.

All materials, goods and equipment forming part of this Contract must be complete, intact and in new order when the Proprietor takes over the responsibility for the works and it shall be the liability of the Subcontractor to safeguard such materials, goods and equipment until then.



M2 EXTENT OF WORK AND GENERAL REQUIREMENTS

M2.1 EXTENT OF WORK Carry out the design, coordination, supply, delivery, installation, testing and commissioning of the complete mechanical services installation complying with the detailed requirements specified herein and generally as shown on the drawings. The complete installation shall meet all requirements of the governing authorities and shall conform with all appropriate current Australian Standards.

Works include but shall not be limited to the following:

1) The nineteen (19) ILU’s shall be air conditioned via inverter driven, air-cooled, reverse cycle, ducted, split units providing day/night zoned control arrangement. The systems shall provide separate zone control of the living and bedroom areas. Each system shall comprise air cooled condensing unit and above ceiling mounted ducted fan coil units. The units shall be located in roof spaces with conditioned air delivered via insulated sheetmetal and flexible ductwork and wall mounted linear bar grilles. Return shall be via wall mounted linear bar grilles.

2) Bathrooms and Ensuites shall be exhausted via ceiling mounted fan/heat/light units discharging to eaves mounted discharge grilles via insulated flexible ductwork. Fan/heat/light unit to be installed by electrical trade.

3) Ranghoods shall be discharge to eaves mounted discharge grilles via semi flexible ductwork. Ranghoods by building trade.

4) Laundries shall be naturally ventilated

5) Refrigerant and condensate piping systems for the above.

6) All necessary drains, bleed-offs and overflows from the equipment and drain trays piped to discharge to drain points.

7) Sheet metal apparatus casings to form the mixing plenums for the air conditioning units complete with filter holding frames, filter access panels, etc. to make the system complete for operation.

8) All sheet metal ductwork for air conditioning and ventilation systems complete with all outlets and grilles, volume controls, filters, flexible connections, flexible ductwork, flashing collars, door grilles, hangers, fittings and the like to form complete air distribution systems.

9) Acoustic lining and external and internal insulation of ductwork and plenums as shown on the drawings.

10) Insulation to refrigeration and condensate drain pipework as specified.

11) Painting of all portions of the installation exposed to view.

12) Provision of detailed drawings of all plinths, kerbs, drain points, penetrations, access panels, eye bolts and the like and any other items required to be provided by other trade subcontractors on behalf of the Mechanical Subcontractor.

13) Over flashing of all roof and wall penetrations. Under flashing will be provided under another section of this contact.

14) Labelling of the complete installation as specified.

15) Control panels and all electrical equipment and wiring required for the proper operation and control of the complete mechanical services installation.

Mechanical Subcontractor to wire between:

• Isolating switches & condensing units.

• Air conditioning units and remote control stations.

• Air conditioning units and condensing units.

16) Electric/electronic control systems fitted with all controls and safety devices necessary for completely automatic unattended and safe operation.



17) Provision of twelve (12) months operational maintenance.

18) Testing and commissioning of all equipment installed under this contract.

19) Provision of as-installed drawings, completed tests reports, equipment data and operating and maintenance instructions at practical completion.

20) Instruction and training of Owners representative in the operation of all mechanical systems.

21) All ancillary items necessary to fully commission all the mechanical service plant associated with this contract.

M2.2 WORKS BY OTHER TRADES The following works will be carried out by other trade subcontractors with respect to the mechanical services works:

Works by Building Contractor: • Building envelope complying with BASIX and Section J of the Building Code of Australia,

including thermal performance of roof, walls and glazing.

• All cutting, patching and making good of the building structure, trusses, roofs and ceilings for the installation of ductwork, outlets, pipework and conduits etc.

• Bulkheads and ceiling access panels for ductwork and equipment.

• Building in of conduits, pipes and brackets. Positioning of these items shall be done by the Mechanical Subcontractor.

• Framing and underflashing of roof penetrations.

• Kitchen rangehoods suitable for ducted discharge

Works by Hydraulic Subcontractor • Tundish drains and drain points as indicated on the drawings.

Works by Electrical Subcontractor • Supply, termination and connection of 240V power supplies to the condensing units. The

supplies shall terminate with isolating switches, (water proofed where exposed) adjacent to the equipment

• Bathroom and Ensuite Fan/Heat/Light units, suitable for ducted discharge, and all associated power & controls

• The Mechanical Trade shall liaise with the Electrical Trade to determine the type and size of submains, power requirements, etc for all mechanical services equipment.

M2.3 AIR CONDITIONING SYSTEM DESIGN CONDITIONS

Air conditioning heating & cooling capacities shall be calculated via the “Carrier Method” as detailed in the AIRAH Application Manual DA09, or via software based on this method, such as ACADS-BSG Camel software. Calculations shall be submitted for review along with proposed air conditioning unit selections.

The mechanical ventilation and air conditioning systems installed under this contract shall comply with the following design criteria.

Air conditioning Design Conditions:

Summer: Inside 23.0oC DB ± 1.0oC

Outside 36.5oC DB / 22.7oC WB

Winter: Inside 21.0oC DB ± 1.0oC

Outside 1.1oC DB

Internal Loads:

Lighting 5 W/m2

Equipment 500 W in Living Area



Occupancy Living /Dining – 4 people Bedroom 1 – 2 people Bedroom 2 – 1 person Bedroom 3 – 1 person 3 Bedroom Unit – 8 people max. Partition Loads Where ILU’s are adjacent each other, assume adjacent ILU’s

are unoccupied at the time of peak cooling load & therefore treated as unconditioned spaces.

All equipment shall be selected on the calculated capacity plus the following minimum safety factors.

− Cooling – 10%

− Heating – 30%

− All fan system air volumes based on system pressure characteristics – 10%

Ventilation ILU’s The ILU’s shall be mechanically ventilated with outside air via

the air conditioning systems in accordance with AS1668 to satisfy window closed acoustic requirements in accordance with the acoustic report and The Department of Planning’s Development near Rail Corridors and Busy Roads – Interim Guideline.

Bathroom or Toilet exhaust Fan/Heat/Light unit (by electrical trade) Laundry exhaust Naturally ventilated Cook Top exhaust Discharge to outside (Rangehoods by others)

Building Fabric Glazing:

Type Single

Shading Coefficient TBC (To comply with BASIX)

U Value (GLASS) TBC(To comply with BASIX)

External Walls: TBC(To comply with BASIX)

External Shading: TBC(To comply with BASIX)

Floors TBC(To comply with BASIX)

Design All ductwork shall be designed to the following limits:

Rigid sheetmetal duct: < 6.0m/s and < 0.8 Pa/m

Flexible duct: < 4.0m/s

Diffusers, Registers and Grilles Diffusers, registers and grilles shall be sealed tight to ductwork, etc and shall be properly adjusted for air flow rate and air distribution pattern. Air movement within the occupied space shall nowhere be less than 0.20 m/sec nor more than 0.32 m/sec. Particular care shall be taken to ensure that air does not wash the ceiling and thereby cause smudging. No spot welding marks shall show on the surface of component items. All materials and methods used for these items shall be compatible with the ceiling system and final fixing and adjustment is accurate and true with the finished ceiling.



Noise Criteria Air conditioning and ventilation plant shall be designed and installed to not exceed the following maximum levels:

Bedrooms: 35 dBA max.

Living/Dining/Study/Kitchen: 40 dBA max.

Toilet areas: 45 dBA max.

Boundaries: To Council requirements (Refer Section M1.4)

M2.4 SYSTEM PERFORMANCE GUARANTEE By accepting the contract, the Mechanical Subcontractor will be deemed to have guaranteed that the installed mechanical services installation will meet the plant performance requirements as detailed in this specification, when operating within the design references stated and that the systems installed will automatically maintain specified conditions throughout the air conditioned areas under all conditions of summer, winter and between seasons loading.

M2.5 SYSTEM RESISTANCES Requirement The capacity of plant, particularly fans shall be as specified when operating against the actual installed system resistances. The system resistances stated in this specification are given as a guide only. Provide proper matching of all plant performances with the final systems resistance resulting from the use of his plant, and ductwork reticulations.

M2.6 FIXINGS Provide fixings necessary for attaching equipment, conduit, ducting, brackets, and similar items to floors, ceilings and walls of the approved adjustable metal-expansion type installed in pre-drilled holes. Wooden plugs and explosion set fixings will not be allowed.

M2.7 BEARINGS AND LUBRICATION Provide all bearings and methods of lubrication of approved type in each instance, and suitable for continuous operation.

Provide ready accessibility and protection against the entry of dust to all lubricators.

Check all bearings during tests and make any necessary adjustments prior to handing over.

M2.8 LABELS AND IDENTIFICATION Clearly label all items of plant equipment, mechanical services switchboard, miscellaneous equipment and services by means of approved type labels, identification tags, stencilling and colour code paint finishing.

Provide schedule of the sizes of all labels and nameplates, and the lettering and wording thereon.

Match all identification lettering and all markings to those shown on the as-installed drawings. Show the locations and sizes of labels and wording, where applicable, on the respective shop drawings.

Identify items of plant and equipment by means of 75 mm high black stencilled block lettering on background colour panels of appropriate size.

Colour-band and identify ductwork and pipework generally in accordance with AS 1345.

Accompany colour bandings with directional arrows where applicable. Provide 75mm long arrows for pipes of 50 mm diameter and under, and 150 mm long arrows on larger pipes and ductwork.

Provide labels of the laminated Traffolyte type with polished white surfaces, bevelled edges and black engraved block type lettering, and secured by an approved surface adhesive and screw fixed.

Identify each valve by means of punched lettered and numbered 25 mm diameter brass tag, secured to the handwheel by a brass chain link.



M2.9 NOISE AND VIBRATION General Provide control of the noise output and vibration from the installed plant.

Install and adjust equipment and plant in accordance with the specification and the manufacturer's recommendations. Install, balance and adjust all air, refrigeration and water systems in such a way as to avoid noise generation at dampers and valves due to incorrect balancing procedure, or incorrect installation or adjustment of splitter dampers, guide vanes and the like.

Noise Measurement If noise from the plant is obviously excessive due to noisy bearings or scraping of rotating parts in guards or housings or other similar malfunctions, then repair or replace the equipment without first carrying out noise measurements.

Carry out noise measurement only if excessive noise is evident. If such measurements show that noise from items of equipment exceeds the sound power levels specified, or alternatively if no sound power level is specified and the noise exceeds the manufacturer's catalogue data, then the cost of noise measurement shall be the Mechanical Subcontractor's responsibility, at no extra cost to the Principal.

Carry out noise measurements at the completion of the installation and after the system has been balanced. Make noise measurements with a sound level meter and octave band filter set of approved manufacture.

Calibrate the meter prior to and after noise measurements.

Make noise measurements no closer than one (1) metre from any air outlet or intake or wall, and at a height of at least one (1) metre from the floor.

Vibration The following minimum precautions shall be taken to prevent the generation and transmission of vibration to the building structure.

Machinery Machinery shall be statically and dynamically balanced and shall be isolated from the building structure as required.

Select vibration isolators with due regard to the weight and speed of the equipment to be isolated with isolating efficiencies as specified for the particular equipment or in any case, not less than 98%. Select springs to have a length when loaded approximately equal to their diameter.

Connections Provide sufficient flexibility in the connection of electrical cables, piping and ductwork to vibrating machinery to prevent transmission of vibration.

Piping Provide sufficient flexibility in piping where connected to vibrating machinery. Provide effective isolation from the building structure where necessary to prevent the transmission of vibration.

Ductwork Design and construct all ductwork and fittings to prevent any excessive generation of air noise, vibration of fittings, or drumming of ductwork.

Particular Requirements The following list summarises the vibration isolation requirements for the equipment in the proposal.

• Condensing Units – Waffle pads.

• Ducted Air Conditioning Units – Spring mounts with neoprene cups, 25mm static defection.

• Ductwork connected to fans or fan coil units – 100mm minimum length flexible connection.

M2.10 PAINTING General Prior to painting, clean-down all surfaces to remove all grease and rust from the surface.

Apply one (1) coat of approved rust-inhibiting primer to concealed ungalvanised ferrous surfaces prior to installation. Etch prime galvanised surfaces before paint finishing.



Paint internally in black bitumastic paint sheet metal ductwork connecting directly to outside air.

Touch up all damaged paintwork and joints after installation.

Finish in matt black all ductwork interiors and volume control dampers exposed to view behind the diffusers, registers, grilles, etc.

Extent Except where otherwise specified 3 coat finish all exposed parts of the installation. Unless specified otherwise surfaces in underfloor void and in roof void are not to be painted. Exposed surfaces include:

• Surfaces exposed to staff and public view

• Surfaces external to the building

M2.11 COORDINATION For the duration of this contract the Mechanical Trade shall be responsible for the co-ordination of his design and the mechanical services installation with other trades, designers and the Contractor. Under no circumstances will deficiency in the co-ordination with others give rise to any Contract variations or claims.



M3 MAJOR EQUIPMENT

M3.1 GENERAL Cross References Comply with the General Requirements section.

Related sections Refer to the following sections: Control Panels, Mechanical Insulation, Refrigeration and Ductwork.

M3.2 QUALITY Pre-Completion Tests Standards Heat pumps: To AS/NZS 3823.1.1

Split air conditioners: To AS 1861.2.

M3.3 AIR CONDITIONING EQUIPMENT General The air conditioning units shall be Daikin, Mitsubishi Electric or equal approved manufacture operating with R407C or R410A refrigerant and comply with the minimum energy performance standard (MEPS) levels.

All air conditioning systems shall have an energy efficiency ratio complying with the Building Code of Australia Section J, Table J5.4b, when tested in accordance with AS/NZS 3823.1.2 at test condition T1.

Operating conditions Provide equipment which operates within an ambient temperature range of 0o to 45oC, without excessive head pressure, unstable operation or icing.

Equipment enclosures Outdoor location: Provide enclosures, materials and finishes which are corrosion-resistant, and weatherproof if necessary.

Construction: Assembled and reinforced to prevent flexing and drumming. Provide for removal of major components.

Access: Provide access for inspection and maintenance.

Access panels: Readily removable with positive re-useable fasteners and soft gaskets which provide an airtight seal.

Insulation: Insulate enclosures to prevent external surface condensation under operational conditions.

Condensate trays General: Provide a tray under each cooling coil section, extending downstream to collect water carry over, and under components on which condensation can occur.

Material: Corrosion-resistant.

Insulation: Insulate trays to prevent condensation internally and on external surfaces of the unit enclosure, under operational conditions.

Reverse cycle units: If reverse cycle outdoor units do not have drain connections, location condensate trays below units.

Condensate drains: Connect condensate trays to nearest drain points by means of trapped minimum DN 20 drain lines.

Hermetic compressors Refrigeration service: Provide facilities for access to suction and discharge sides of refrigeration circuits.

Installation of condensers Clearance: Provide clearance around units for air flow and maintenance access.



M3.4 CONDENSING UNITS General General: Provide packaged condensing units consisting of refrigerant condensers, compressors and associated piping and electrical connections, mounted within the condenser enclosure.

Multiple compressor units: Provide separate control and electrical circuits for each refrigerant circuit.

Pressure cut-outs: Provide a manual reset high pressure and an auto reset low pressure cut-out for each compressor.

Motor protection: Provide short circuit protection by means of high rupture coefficient (HRC) fuses or circuit breaker and a contactor (with manual reset thermal overload) for each compressor and each 1 phase motor.

Short cycle timer function: to limit compressor starts.

M3.5 FAN COIL UNITS General Provide units consisting of coils, piping, supply air fan, filter, accessories and electrical connections, mount with an insulated enclosure.

Ceiling mounted multi–flow units shall be complete with facia panel and integrated condensate drain pump.

M3.6 AIR CONDITIONING SYSTEMS General The air conditioning systems shall be a Daikin, Mitsubishi Electric or equal approved manufacture.

Outdoor units shall contain an inverter controlled scroll compressor suitable for R410a refrigerant.

The system operating temperature range capability shall be:

• Cooling: -5°C DB to 43°C DB

• Heating: -12°C WB to 15°C WB

Heat Pump System The system shall be air cooled, split multi system air conditioner consisting of outdoor units as noted in the equipment schedule.

PACKAGED OUTDOOR UNIT The unit shall be factory assembled and tested. The cabinet housing shall be weatherproof rust resistant steel construction with an acrylic paint finish. Condenser air will discharge vertically upwards with air inlets positioned front and rear.

The outdoor unit shall feature the following:

• The sound level shall not be greater than 57/58 dB(A) when measured 1 metre from unit and 1.5 metres above ground level.

Compressor – Inverter The compressor shall be a high efficiency hermetic scroll design, suitable for inverter control. Capacity load variations from 16% to 100% shall be achieved by compressor speed changing to match cooling and heating demands.

The inverter linear control shall be stepless.

Heat Exchange Coils The condenser coil shall be constructed from refrigerant quality copper tubing mechanically expanded into aluminium fins.

Refrigeration System The refrigeration circuit shall include accumulators, sub-cool heat exchanger, service access, isolating and solenoid valves.

An oil recovery system shall be provided to maintain optimum system performance with long pipe runs.



R410a Refrigeration System A refrigerant composition sensing circuit shall be included to sense the refrigerant blend, composition and system control.

INDOOR UNIT The nominated indoor units shall provide continuous refrigerant control by electronic expansion valve. The variable refrigerant flow rate will match room cooling and heating requirements.

The supply fan shall be a forward curve direct driven by a single phase induction motor.

The control address for each indoor unit shall be individual/group control as noted.

Remote controls shall be used as noted to provide individual control and be capable of simultaneous operation and control of up to 10 indoor units if required.

Indoor units are to be individually remote controlled.

Ceiling cassette units shall be complete with integral condensate pump with minimum lift of 750 mm.

Internal Refrigeration System Standard: To AS 1677.

Piping: Copper pipe to AS/NZS 1571.

Insulation: Elastomeric foam.

Reverse cycle units: Provide:

• effective outdoor coil defrost facility; and

• refrigerant reversing valve.

Local Control Local remote control stations (RCS) shall be provided for each air conditioning unit.

M3.7 AIR FILTERS General Dry media disposable deep vee type filters shall be Email, Australian Air Filters or equal approved fixed panel type, comprising elements of 25mm, 50mm and 100mm thickness and with sizes and capacities as scheduled.

Filter media shall be bonded to a welded wire grid mesh with not less than 96% free area.

Media shall be mounted in a rigid, high wet-strength beverage board, with supporting grid front and rear. The frame shall be chemically bonded to the filter media.

Minimum Performance Rating – F4

Minimum Efficiency AS1324 No. 1 Dust – 20%

Average Efficiency AS1324 No. 1 Dust – 27%

Average Arrestance ASW1324 No. 4 Dust – 85%

Dust Holding Capacity – 175 grams (50mm), 275 grams (100mm)

Filters shall be slide mounted or provided with separate mounting frame with stainless steel clips and sealing gasket. Filter frames shall be constructed of galvanised steel of minimum thickness 1.6mm.

Filter Labelling Provide a 75 x 75 Traffolyte label beside each filter engraved with the following information:

1. Filter number

2. Associated Fan No.

3. Total Airflow.

4. Outside Airflow.

5. Filter Classification.



6. Filter Efficiency.

7. Clean Resistance

8. Dirty Resistance



M4 DUCTWORK AND ACCESSORIES

M4.1 STANDARD Ductwork AS 4254.

M4.2 SAMPLES Air grilles Submit a sample of each type of air grille.

M4.3 CONTRACTOR'S SUBMISSIONS Product data Submit type test data as follows:

• Air diffusion equipment: Acoustic performance to BS 4773:2.

Closure For positions where dampers cannot be installed to close in the direction of the air flow, submit proposed installation details.

Access Panels Submit proposed alternative sizes, if any.

Sheet metal plenums If using proprietary ribbed interlocking panel systems, submit details of construction.

M4.4 SHEET METAL Material Zinc-coated steel sheet, coating class G2/Z275.

Fasteners Rivets Expanding solid end type, aluminium base alloy, minimum size as follows:

• For sheet metal to sheet metal: 3 mm.

• For sheet metal to supports, brackets and rolled steel angles: 4.8 mm.

Self tapping screws Bright zinc-plated.

Self drilling and tapping screws Bright zinc-plated. Use only if base material into which they screw is thicker than 1.5 mm, and they are unlikely to be removed or replaced.

Bolts, nuts, washers and drop rods: Zinc-plated steel, service condition number 2. Provide washers under nuts and bolt heads.

M4.5 STANDARDS OF SHEET METAL DUCTWORK CONSTRUCTION Sheet metal ductwork shall be constructed in cold rolled mild steel hot dip galvanised.

The ductwork and duct fittings construction standards shall match those of the existing ductwork on site or shall be in accordance with AS4254.

Standard full size sheets shall be used for making ductwork and any patched ductwork will be rejected. Formed ductwork shall be free from waves or buckles and each panel shall be cross broken for rigidity. All ductwork shall be machine made or formed to ensure a neat and accurate finished product. Longitudinal seams shall be Pittsburgh lockseam type for 1mm thickness and lighter and knock up seams for heavier gauges.

Where trouser pieces cannot be used for branch connections, spigots cut into the side of the main duct may be used. Under no circumstances will it be permissible when cutting in a spigot to cut the longitudinal joint. Where the size of branch duct does not allow direct connection to the main duct without interference with the longitudinal seam, a more suitably shaped spigot shall be used with a transformation piece.



Where angle iron duct flanges and stiffeners are required they shall be fitted to the four sides of the duct and be purpose made for the job with two sides running out to the full extremity of the flange and welded. Alternatively, flanges may be mitred at the corners and welded. Flanges bent and cut around corners will not be permitted.

During construction, all open ends of ducts shall be sealed to prevent the ingress of dust and Mechanical Trade Subcontractor's waste and in the case of large horizontal openings, to prevent accidents.

All mechanical ventilation systems air intakes, air discharges, grilles, etc, shall be complete with bird wire/vermin proof mesh grilles to limit the ingress of vermin, where appropriate.

Where ductwork and pipework penetrate walls exposed to weather, penetrations shall be sealed, waterproofed and flanged with angle trim.

M4.6 SUPPORT BRACKETS All rectangular ductwork shall be supported to approval at 1500 mm to 3600 mm intervals, as appropriate to size and construction. Supports on horizontal runs shall comprise angle iron slings under the ducts, with MS suspension rods carried from brackets secured to the structure above.

Alternatively, duct joint or stiffening angles may be used as supports.

Suspension rods shall be screwed to facilitate proper levelling. Approved galvanised strap hangers may be used for ductwork up to 750 mm dimension, provided they are in the form of one piece cradles.

Flexible ductwork shall be supported clear of the ceiling on independent supports at not more than 1 metre spacings.

M4.7 FLEXIBLE CONNECTIONS General Isolate fans and conditioner casings from ductwork, using airtight flexible connections.

Materials Heavy duty, waterproof, woven denier polyester.

Length Provide sufficient slack to ensure free movement and vibration isolation under operating and static conditions.

Alignment Align openings of connected equipment.

Fixing Fix to attachments using zinc-coated steel strip. Seal joints. Do not paint flexible material.

Maintenance: Arrange to permit easy removal and replacement without disturbing ductwork or plant.

Restriction: Do not protrude connections or frames into the airstream where this would be detrimental to the air flow.

Where exposed to weather flexible connections shall be covered with a galvanised sheetmetal shroud.

M4.8 INSTALLATION Arrangement Arrange ductwork neatly. Provide access to ductwork components which require inspection, entry, maintenance and repairs. Where possible arrange duct runs adjacent and parallel to each other and to building elements.

Spacing Provide minimum clear spacing, additional to duct insulation, as follows:

• 25 mm between adjacent ducts.

• 25 mm between duct flanges or upper surfaces of ducts, and undersides of beams and slabs.

• 50 mm between ducts and electric cables.



• 150 mm between ducts and ground, below suspended floors.

Cleaning During installation progressively remove construction debris and foreign material from inside ducts.

M4.9 VOLUME CONTROL DAMPERS General Provide dampers which are free of rattles, fluttering or slack movement, and capable of adjustment over the necessary range without excessive self-generated noise or the need for special tools.

Face dimensions: Duct size.

Connections: Mating angle flanged cross joints.

Frames: 1.6 mm minimum thickness zinc-coated steel or 2 mm minimum thickness aluminium folded to form channel sections at least 150 mm wide and welded at corners.

Blades Material: Zinc-coated steel, aluminium or stainless steel.

Form: No sharp edges. Sufficiently rigid to eliminate movement when locked.

Minimum thickness: • Steel:

- Single thickness blades: 1.6 mm.

- Double thickness blades: 1.2 mm.

• Aluminium:

- Single thickness blades: 2.4 mm.

- Double thickness blades: 1.8 mm.

Maximum length: 1200 mm. If necessary for the duty provide intermediate mullions.

Minimum size of single blade dampers: • For single thickness blades: 300 mm long x 300 mm wide, or 300 mm diameter.

• For single thickness blades with 6 mm minimum edge breaks: 1.2 m long x 175 mm wide.

• For double thickness blades: 1.2 m long x 300 mm wide.

Minimum size of multi-blade dampers: • For single thickness blades with 6 mm minimum edge breaks: 1.2 m long x 175 mm wide.

Bearings Type: Oil impregnated sintered bronze ball bearings or engineering plastic sleeve bearings. If the operating temperature is > 50ºC, do not use nylon. Motorised dampers shall have ball bearings.

Lubrication: Provide access for lubrication.

Housings: Rivet to damper frames.

Spindles Material: Bright zinc-plated steel.

Construction: Securely fix to damper blades with a minimum of two screws or rivets.

Minimum diameter:

• Blade lengths ≤ 600 mm: 10 mm.

• Blade lengths > 600, ≤ 1200 mm: 12 mm.

Linkages: Fix securely to blades so that the blades rotate equally and close tightly without slip.

Damper adjustment: Provide for adjusting the damper and locking it in position. Locate in an accessible position. Label the open and closed positions clearly and permanently.



M4.10 ACCESS PANELS Sizes Access panels: Minimum clear opening:

• Personnel access: 450 x 600 mm.

• Hand access: 200 x 300 mm.

• Filter 650 x 500 (Bullock Model APO)

Construction Type: Double panel, deep formed, zinc-coated steel construction, insulated to match the duct, or filled with at least 25 mm mineral wool insulation.

Cold bridging: Minimise.

Frames: Provide rigid matching galvanised steel frames securely attached to the duct. Do not protrude any part of the panel or frame into the airstream.

Seals: Silicone rubber or soft neoprene gaskets mechanically fixed to either the panel or the frame to ensure an airtight seal when latched in the closed position. For fire rated seals, use woven ceramic fibre material.

Latches: Wedge type sash latches.

Number of latches:

• For personnel access: 4.

• For hand access: 2.

M4.11 FLEXIBLE SUPPLY AND RETURN AIR DUCTWORK Materials Internal sleeve: Perforated flexible reinforced aluminium

Insulation: Polyester R1.0

Outer Sleeve: Flexible reinforced aluminium vapour barrier.

Rating Rating: 4 zero

Installation Requirement: Provide clamp fixings to secure flexible ductwork to duct and grille spigots.

Dampers: Provide butterfly dampers in duct take off spigots.

Spigot Type: Bellmouthed

Performance Requirement: Provide minimum attenuation performance as follows:

Frequency (Hz)

63 125 250 500 1K 2K 4K 8K

Attenuation (dB) 20 25 18 15 20 25 12 8

M4.12 AIR DISTRIBUTION DEVICES General Diffusers, registers, grilles, etc shall be of the type, sizes, numbers and positions as shown on the drawings.

The Mechanical Subcontractor shall co-ordinate with the Builder and his Subcontractor to determine the most suitable method of installation and support.

All ductwork interiors and volume control dampers exposed to view behind the diffusers, registers, grilles, etc, shall be finished in matt black paint.

The type of finish and colour of all diffusers, registers, grilles, etc, shall be selected by the Architect.



All duct mounted diffusers shall be complete with integral opposed blade volume control dampers operable through the respective diffuser face. Diffusers on flexible ducts shall not have integral dampers. Butterfly dampers shall be fitted in the duct take off.

All supply, return and exhaust grilles shall be complete with insulated plenum box complete with side or top entry collar for flexible ductwork connection.

Supply Air – Linear Bar Grilles Air conditioning supply air grilles shall be equal to Air Grilles Model LBF 15 complete with vertical deflection blades (matt black) mounted behind the grille face. The grille frame shall be reverse flange or frameless type and the assembly shall be provided with an insulated plenum box.

Unused section of the linear bar grille shall be blanked off with sheet metal lining painted matt black.

Return Air Grilles Return air grilles shall be Linear Bar Grilles Air Grilles model LBF 15 (vertical) or Half Chevron type (horizontal) as shown on the drawings. Return air grilles shall be fitted with internally insulated plenum boxes.

Bathroom/Ensuite/Rangehood Eaves Mounted Discharge Grilles Eaves mounted discharge grilles shall be Air Grilles RA45 Half Chevron type or equal approved.

All discharge grilles shall be complete with full size cushion head plenum boxes and vermin proof mesh.

Eaves Mounted Outside Air Intake Grilles Eaves mounted intake grilles shall be Air Grilles RA45 Half Chevron type or equal approved.

All discharge grilles shall be complete with full size cushion head plenum boxes and vermin proof mesh.

Plenum Boxes Plenum boxes shall be fitted to the neck of all grilles, registers and diffuser and sized and located as shown on the drawings and incorporating provision for connection of flexible ducts.

Galvanised steel plenums shall be constructed as for low pressure steel ductwork, insulated internally with minimum 25mm thick internal duct insulation. All joints must be sealed air tight.

Internal surfaces of plenums visible through the grille face shall be painted matt black.

Installation Protection: Leave protective wrappings, in place until final mounting.

Mounting General: Provide a matching escutcheon to close gaps between an outlet and its surrounds. Provide grilles with flanges to cover penetrations and irregularities in surrounds.

Appearance: Install square.

Fixing Visibility: Use concealed fixings.

Accessibility: Use fixings which allow removal without damage to surrounds or outlets.

Gaskets: Provide foam type gaskets under outlet flanges or flanged supports.

Plenum boxes: Provide internally insulated plenum boxes to grilles, registers and diffusers etc. connected to flexible ductwork.

Flexible duct connections: Provide round or oval spigots on plenum boxes.

Internal insulation:

• Insulation type: Semi-rigid mineral wool, 25 mm minimum thickness.

• Surface facing type: Factory applied perforated aluminium foil laminate.

M4.13 DUCTWORK CLEANSING During construction, all open duct ends including ductwork in storage, plenums, equipment, etc. shall be sealed to prevent the ingress of dust in accordance with AS 3666.

Failure to comply with the requirement shall result in the cleansing of all contaminated ductwork and equipment at the Contractor’s expense to the approval of the Mechanical Consultant.



Duct cleansing shall be performed by an approved specialist cleansing company.



M5 REFRIGERATION

M5.1 GENERAL Cross References Comply with the General Requirements section.

Related Sections Refer to the following sections: Packaged Equipment

Standards General General: To AS 1677 and SAA HB40.

Pressure vessels: To AS 1210 or AS 2971.

M5.2 QUALITY Pre-Completion Tests Site Testing of Piping General: Test completed piping system.

Preparation for testing: Isolate items of equipment not designed to withstand the test pressure and secure pipes and fittings in position to prevent movement during the tests.

Pressure/Leak Tests Test medium: Dry nitrogen.

Test criteria: No loss of pressure over a 24 hour test period after taking account of changes in ambient temperature.

M5.3 PIPING Pressure Piping Standard To AS 4041.

M5.4 PIPES AND FITTINGS Pipes Standard: To AS/NZS 1571.

Temper designation: H temper. 0 temper may be used for pipes < DN 25 or for pulled bends or flared joints.

Pipe wall thickness:

• Pipes ≤ DN 50: To AS 1432 Type B.

• Pipes > DN 50: 1.6 mm, minimum.

Bends Pulled bends: Form bends without flattening the cross section or wrinkling the inside radius.

• Pipes < DN 18:

- Minimum inside radius: 3 pipe diameters.

- Minimum included angle: 90o.

Pipe fittings Copper alloy fittings: To AS 3688, dezincification resistant.

Flared fittings: To SAE J533. Provide flare coupling nuts designed for high pressure refrigeration work.

Preformed fittings: Preformed refrigerant capillary line tees, bushes, couplings and elbows. Wherever possible make reductions at elbows, tees, line devices or equipment connections with reducing fittings; otherwise provide reducing bushes or reducing couplings.

Compression fittings: Flareless twin ferrule, torque free, mechanical grip fittings which can be gauged using a precision ground and hardened metal gap inspection gauge.



Brazed joints General Provide preformed capillary fittings or form capillary unions by expanding one pipe end. Prevent flux and brazing alloy from entering pipes. Use dry nitrogen to purge air from pipes before brazing. During brazing, maintain a flow of dry nitrogen through pipes to prevent oxidation.

M5.5 PIPING INSTALLATION General Refrigerant charging Provide for charging and withdrawal of refrigerant.

Oil circulation Ensure positive oil return to the compressor. Prevent oil draining back into the head of the compressor during the off cycle.

Accessibility Gauges Locate thermometers, pressure gauges and similar instruments so that they are easily read after installation.

Supports Support systems Saddles: Do not provide saddle type supports for pipes ≥ DN 25.

Dissimilar metals: If pipe and support materials are dissimilar, provide industrial grade electrically non-conductive material securely bonded to the pipe to separate them. Provide fixings of electrolytically compatible material.

Uninsulated pipes: Clamp piping supports directly to pipes.

Insulated pipes:

• Spacers: Provide spacers at least as thick as the insulation between piping supports and pipes. Extend either side of the support by at least 20 mm.

• Spacer material: Rigid insulation material of sufficient strength to support the piping, and suitable for the temperature application.

• Vapour barriers: For cold pipes apply aluminium foil tape over the circumference of the spacer to form a vapour barrier.

• Metal sheathing: Provide a 0.55 mm thick zinc-coated steel band between the aluminium foil tape and the support, for the full width of the spacer.

Pipe support spacing table

Nominal pipe size, DN Maximum spacing (m) Horizontal Vertical 10 1 2 ≥ 15, ≤ 20 1.5 2.5 25 2 3 32 2.5 3

Hanger size table

Outside diameter of pipe of Sheathing

Minimum hanger diameter (mm) Light series Heavy series

<20 6 6 ≥ 20, <35 10 10 ≥ 35, <65 12 12



Flexibility Anchorage Provide pipe anchors and pipe guides which accommodate expansion and contraction, and minimise the transmission of vibration and noise to building structures. Locate anchors and guides at equal distances on each side of expansion devices. Securely fix anchors to bare pipe. Arrange piping to move in lateral and linear directions (e.g. at bends) while not deviating from necessary gradients.

Marking Refrigerant Identify the type of refrigerant at the charging point and on indicator panels.

M5.6 COMPLETION Charging Dehydration General: Dehydrate the refrigeration gas system before charging with refrigerant gas.

Method: Use a high-vacuum pump, connected to both high and low pressure sides of the system with valves open and controls connected. Measure the pressure with calibrated electronic or similar gauges. Do not use wet-bulb determination.

Pressure to be achieved:

• For systems with a suction temperature ≤ 0°C: 27 Pa.

• For systems with a suction temperature > 0°C: 53 Pa.

Vacuum test: Maintain vacuum for at least 24 hours, after taking account of changes in ambient temperature.

Systems with a suction line ≥ DN 50: After dehydration, charge the system with dry nitrogen to the system test pressures, then dehydrate again using the above method.

Charging On completion of dehydration, charge the system with refrigerant and oil and test for leaks using an electronic gas detector.

Maintenance Leaks Rectify the source of the loss and retest for leaks using an electronic gas detector, and replace lost refrigerant.



M6 INSULATION

M6.1 EXTENT Insulation to air conditioning ductwork and piping shall comply with BCA requirements in particular Part J5, specification J5.2 and J5.4 and the relevant Australian Standards in particular AS/NZS4859.1.

External Insulation • As required to meet thermal and compliance requirements.

• All ductwork shown hatched on the drawing

Internal Insulation • As required to sheet acoustic, thermal and compliance requirements

• All ductwork shown cross hatched on the drawings

• All plenums shown cross hatched on the drawings.

Pipework Insulation • Refrigerant suction and liquid pipework

• Condensate drains

M6.2 INTERPRETATIONS Definitions Mineral wool: Entangled matt of fibrous product derived from molten rock or furnace slag.

Glasswool: Entangled matt of fibrous product derived from molten glass.

M6.3 PRE-COMPLETION TESTS Tensile Strength of Paper: To ASTM D 828, or AS 1301.P404s.

Water Vapour Transmission Characteristics of Paper: To AS 1301.419s Condition B, or ASTM E 96 Procedure E.

Early Fire Hazard Indices: To AS 1530.3.

Aluminium Foil Laminate Tape Physical properties: To SMACNA Fibrous Glass Duct Construction Standard.

M6.4 DUCTWORK INSULATION MATERIALS Mineral wool and glasswool Type: Resin bonded to form batt, board or blanket.

Standard: To AS 3742.

Physical properties: • Maximum thermal conductivity: 0.036 W/m.K at 20ºC.

• Alkalinity: Ph 7 - 9.

• Moisture absorption: Non-hygroscopic.

Flexible type: Blanket form.

Semi-rigid mineral wool and glasswool Type: Batt or board form with a maximum mean deflection of 6 mm for 50 mm thick material and 20 mm for 25 mm thick material, tested as follows:

• Freely support a 900 x 1500 mm test piece on its longer sides.

• Allow the test piece to stand for 10 minutes and measure the vertical deflection.

• Turn the test piece over and repeat the test.

• Average the results.



Minimum absorption coefficients table Insulation Absorption coefficients (nominal) to AS 1045 at 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz

Perforated foil faced:

- 25 mm thick

0.08

0.24

0.68

0.96

1.01

- 50 mm thick 0.26 0.66 1.09 1.09 1.05

Perforated metal faced:

- 50 mm thick

0.20

0.73

1.00

0.99

0.89

Adhesives General: Use adhesives which are suitable for bonding facing to the insulation. Apply in an even coat.

Early fire hazard indices: • Spread-of-flame index: 0.

• Smoke-developed index: 0.

Aluminium foil laminate Physical characteristics:

• Tensile strength (minimum):

- Machine direction: 14.5 kN/m.

- Lateral direction: 9.8 kN/m.

Aluminium foil laminate tape Adhesive: Non toxic, high tack synthetic pressure sensitive type.

Liner: Silicone coated paper.

Backing: Aluminium foil laminate.

Minimum width: 75 mm.

Physical properties: • Tensile strength: 4.8 kN/m (average minimum).

• Shear adhesion: To Table 3.2.

• Peel adhesion at 180°: 0.68 kN/m (average minimum).

Water vapour permeance (maximum): • Creased: 2.26 ng/N.s.

• Uncreased: 1.13 ng/N.s.

M6.5 MECHANICAL FIXING OF DUCTWORK INSULATION Fixing Pins General: Provide a fixing system which

• is corrosion resistant;

• does not damage insulation;

• sustains a 25 kg tensile dead load test perpendicular to the duct wall;

• is the correct length for the insulation thickness; and

• has a head diameter of at least 20 mm.

Speed clips: Use bevel edged metal type with a minimum diameter of 20 mm. Secure speed clips flush to the face of the insulation.

Insulation Overlap: Provide an overlap of at least 300 mm where insulation changes from the inside of the duct to the outside.



Vapour Barriers: Use vapour barriers which are free from perforations and leaks, continuous, and sealed continuously at penetrations. Place vapour barriers on the side of the insulation which will be warm during cooling mode operation.

Application of Tapes: Ensure surfaces are dry and free of dust and grease before applying tapes.

M6.6 DUCTWORK INTERNAL INSULATION System Description Insulation type: Semi-rigid mineral wool or glasswool.

Surface facing: Factory applied perforated aluminium foil laminate.

Application: Cover parts of ducts designated to be insulated, using individual pieces of insulation for each side of the duct. Where this is not possible, butt join edges of adjacent pieces.

Joins in Insulation General: Cover joints using 63 mm wide aluminium foil laminate tape, centrally located.

Longitudinal joins: Locate behind corner angles or cover strips.

Fixing Method: Select from the following:

• Corner angle and end nosing method:

- Corners: Overlap adjacent sides at corners. Hold insulation in position using zinc-coated steel corner angles. Fix corner angles under the turn back of the end nosing. For corner angles longer than 1.6 m provide additional fixing at 1.6 m maximum centres.

- Corner angles:

� Ducts with faces < 300 mm: 25 x 25 x 0.55 mm, minimum. � Other ducts: 40 x 40 x 0.55 mm, minimum.

- End nosings: At ends of ducts, hold insulation in position using U-shaped zinc-coated steel end nosings, with edges crimped towards the surface. Rivet end nosings to ducts.

� Size: 0.55 mm thick with a minimum 50 mm turn back over the insulation.

- Butt joints: Square cut and butt tightly together edges of adjacent pieces of insulation. Cover with 50 x 0.55 mm zinc-coated steel strip. Rivet cover strips under corner angles or under turn-back of end nosings. For cover strips longer than 1.6 m, provide additional fixing at 1.6 m maximum centres.

- Fixing pins: For ducts with faces ≥ 300 mm, fix the insulation at 300 mm maximum centres with at least one row per duct face.

Facing: 0.55 mm thick perforated zinc-coated steel sheet with perforations of 2.5 mm diameter providing 10% open area.

Installation: Space supports at 600 mm maximum centres with the lowest at 150 mm above the floor and with section flanges on the facing side turning down. Fix supports to sheet metal housings using rivets with heads on the outside and to masonry housings using expanding masonry anchors. Overlap facing 25 mm minimum at all joints and fix to supports using rivets at 150 mm maximum centres. Trim edges at openings with Z sections.

Perimeter: Trim with 40 x 40 x 0.55 mm angles riveted to facing at 300 mm maximum centres.

M6.7 PIPING INSULATION General: Do not apply insulation to piping joints until piping pressure testing is complete. Before installing insulation, ensure that surfaces are clean and dry.

Supports: Do not apply insulation at supports until the spacers, vapour barrier (if any) and metal sheathing (if any) have been installed.

Cold Piping General: Insulate piping carrying fluids at temperatures below ambient including cold refrigerant and condensate piping, and associated valves and fittings.

Metal sheathing: Provide metal sheathing to piping insulation exposed to view, including in plant rooms, and where exposed to weather.



Material Type: Chemically blown closed cell nitrile rubber in tubular sections with a smooth natural finish and vapour barrier properties..

Standard: To ASTM C 534.

Physical Properties: • Maximum thermal conductivity: 0.04 W/m.K at 0ºC.

• Moisture absorption: Non-hygroscopic.

• Water vapour permeability: 0.065 ng/Pa.s.m (maximum).

• Early fire hazard indices:

- Spread-of-flame index: 0.

- Smoke-developed index: 3 (maximum).

Installation General: If practicable, do not slit. If slit, and for valves, fittings and large diameter pipes, fix using adhesive at joints. Adhere to the pipe at end joints, for a distance of 25 mm, to compartmentalise each section.

Timing: Do not install before pressure testing at joints, fittings and valves. Do not adhere butt joints until after pressure testing.



M7 ASSOCIATED ELECTRICAL WORKS

M7.1 DESCRIPTION Supply, deliver, install, test and commission all electrical works associated with the Mechanical Services contract. The installation shall be complete in all respects and shall incorporate the following:

• All power cabling between each new item of mechanical services equipment and the respective isolating switch, control panel, etc.

• All necessary electrical control wiring as detailed under “Automatic Controls”. All works shall be carried out generally as shown on the accompanying drawings and shall comply with the relevant clauses of this specification. The complete installation shall meet all requirements of the Governing Authorities.

M7.2 REGULATIONS Requirement: The complete electrical installation shall comply with the requirements of Australian Standard AS3000 Parts 1 & 2 and the local Supply Authority.

M7.3 BALANCE OF LOAD Requirement: As far as is possible, the load shall be balanced between the individual phases of supply.

M7.4 COLOUR CODE AND IDENTIFICATION Requirement: The following colour code shall be used throughout the installation.

Busbars and cabling within switchboards and all submains cores and polyphase subcircuits shall be coloured red, white and blue in accordance with the Supply Authority's phase rotation.

Circuits and subcircuits for power shall be coloured as follows:

Multiphase circuit active conductors red, white, blue

Single phase circuit active conductors red

Neutral conductors black

Earth conductors green yellow

Cable identification within switchboards

Active conductors red, white blue

240V Neutral conductor black

Voltmeter, Ammeter wiring red, white, blue and black

240V control (isolator controlled) grey

240V control (non-isolator controlled) orange

ELV AC active brown/red

ELV AC common brown/white

ELV devices brown

ELV DC positive blue/red

ELV DC negative blue/white

Earth green/yellow

No departure from the colour code specified will be permitted without the written approval of the Mechanical Consultant.

Control wiring shall be colour coded as appropriate to the installation and in a manner designed to clearly identify the individual types of conductors (eg. active, common, signal).



For systems having twelve (12) or more control circuits, the control wiring shall be numbered where joining switchboard terminal strips. In addition, control wiring to be terminated in control panels or switchboard provided by other Trade Contractors shall be numbered at their origin and termination. The numbering shall be by means of crimp-on plastic ferrules with engraved or moulded numbers or other approved means. All terminal strips shall be numbered for each wiring connection.

Numbers on the ferrules and terminal strips shall correspond with the identification marking on circuit diagrams forming part of the as-installed drawings.

M7.5 EARTHING Requirement: Supply and install a complete system of Multiple-Earth-neutral (MEN) earthing to earth effectively the main switchboards, distribution boards, conduits, cables, ducts, fixed and general purpose outlets, metal flushplates and lighting fittings and otherwise as required by the SAA Wiring Rules and Integral Energy.

Earth continuity shall be maintained throughout the installation and test certificates of earth continuity and resistance, measured at each switchboard and at each item of plant and equipment shall be supplied to the Mechanical Consultant prior to handing over the works.

The size of earth conductors shall not be less than those required by the SAA Wiring Rules and as determined by the full current carrying capacity of the submains cables and the subcircuit concerned. Earthwires shall be run within the conduits.

M7.6 WIRING METHODS Except where otherwise specified, cabling shall comprise PVC insulated cables enclosed in rigid PVC conduit which shall be concealed by enclosure in concrete slabs and walls, chasing into masonry wall, running in false ceiling spaces, etc.

In plantrooms - Cabling shall be installed in cable troughing or rigid PVC conduit.

In roof space or ceiling space generally - PVC Insulated cables in cable troughing or rigid PVC conduit or cable tray.

Low voltage control cable - Low voltage control cable shall be segregated and shielded from line voltage power and control circuits.

Dropping on walls and columns in occupied areas PVC Insulated conductors in PVC conduit concealed by enclosure within the building fabric or where exposed in screwed galvanised steel.

Essential cabling - MIMS Cabling installed on cable tray.

M7.7 PVC INSULATED CABLES PVC Insulated and PVC Insulated and sheathed cables shall be 0.6/1.0 kV grade in accordance with AS 3147. Insulation shall be V75 grade with stranded copper conductors.

Cables shall be brought to site in their original packages with their labels intact otherwise they shall be liable for rejection. All wiring in which kinks or abrasions occur will be condemned and shall be replaced by the Subcontractor at his own expense.

M7.8 CABLE TRAYS Cable trays shall be perforated metal in standard Admiralty pattern and of Cablemakers or approved equal manufacture. All trays shall have a cold rolled galvanised finish and shall be machine press formed, with both edges returned for stiffening. Tray shall be formed in 2.5 metre lengths and shall be of the following minimum gauges:

Width of tray Thickness of Material

75, 100, 150 mm 1.0 mm

225 mm 1.2 mm

300 mm 1.6 mm

The tray width selected with each application shall allow 20% spare space for future cables.



Trays shall be secured to the structure to approval and shall be installed with sufficient clearance to permit installation of cable clips and other cable fixings. Supports shall be evenly spaced to ensure that tray is true and straight. Spacing of supports shall be within the manufacturer's recommendations for the loading concerned and in any case not less than two (2) supports shall be provided per length of tray.

Supports shall be of substantial fabricated hot-dip galvanised steel construction.

The complete installation shall be free of any distortion or bowing.

M7.9 CONDUIT General Unless otherwise indicated, conduit shall be of the rigid orange coloured PVC type. The use of corrugated rigid conduit will not be accepted.

Except where installed in plant areas, all conduit shall be concealed by enclosure in concrete slabs and walls, chasing into masonry walls, enclosure with stud partitions, etc.

Conduit shall be installed on the draw-in principle.

Surface run conduit shall be installed true and straight and aligned to perpendicular and lateral building elements. Elbows and tees shall not be used unless specifically approved by the Subcontractor.

All conduit joints shall be free from burrs and rough edges and adequate precautions shall be taken at all times to prevent entry of moisture or foreign matter into the conduit system.

The use of flexible conduit shall be kept to a practical minimum. The use of corrugated conduit will not be accepted.

Conduits shall be securely fixed to wall boxes by means of conduit clamps.

PVC Conduit PVC conduit shall comprise light duty UPVC conduit (unless otherwise noted) in compliance with AS 2053. The conduit shall be of minimum size 20 mm diameter and shall be complete with moulded PVC conduit fittings and wall boxes used in conjunction with the conduit shall be of the same manufacture and material as the conduit.

Screwed Steel Conduit All screwed steel conduit shall be of minimum size 20 mm diameter. All conduit and fittings shall be galvanised to meet the requirements of medium protection as set down in AS 2053.7–1991. Joints shall be painted with an approved paint to protect against corrosion. Steel conduits shall be electrically and mechanically continuous.

Flexible Conduit All flexible conduit shall be corrosion resistant and fully weatherproof and of Sealflex manufacture. Positive type screwed fittings shall be used at all terminations of flexible conduits.

M7.10 CABLE TROUGHING General Cabling troughing shall be of approved manufacture and shall be free from burrs and sharp edges.

The troughing shall be complete with clip-on type covers, formed true and straight and returned not less than 10 mm over the sides of the troughing.

Cable troughing shall be fixed to walls or supported in an approved manner at minimum 1,200 mm centres. Each length of troughing shall have at least two (2) fixings or supports.

Cable troughing shall be installed in such a manner that the demountable covers are accessible.

Retaining clips shall be installed to retain the wiring at intervals not exceeding 1,000 mm in all locations except where cable troughing is run horizontally with covers uppermost.

Plastic Troughing Plastic troughing shall be UPVC. The troughing and covers shall be robustly constructed from heavy gauge materials to avoid sagging between supports and to avoid warping. All associated fittings shall be of similar material to the troughing.



Metal Troughing Metal troughing shall be of approved design and construction. The troughing and covers shall be of galvanised sheet steel or aluminium or minimum 0.8 mm thickness and shall be free from burrs and sharp edges.

M7.11 TESTING The Project Manager may carry out tests of the electrical section of this contract at any time during the progress of the works. These tests may include, but not be limited to, inspection of the motor control centres at the manufacturer's works, one (1) and two (2) MV Mega injection tests of the installation and other tests deemed necessary by the Project Manager.

The Subcontractor shall provide all facilities, equipment and personnel if necessary for testing.



M8 AUTOMATIC CONTROLS

M8.1 CROSS REFERENCES General Comply with the General Requirements section.

Related sections Refer to the following sections: Wiring and Accessories

M8.2 STANDARD General To AS1668.1, AS1044

M8.3 GENERAL General Requirement: Supply, delivery, installation, testing and commissioning of all manual and automatic controls required for the proper operation and control of the mechanical services installation for the proposed building, generally as shown on the drawings and as specified.

Engineering: Provide selection of equipment and carry out detailed engineering of the systems suitable for the application.

Diagrams: Provide detailed control diagrams for each system to suit the particular manufacturer's equipment, for approval before commencing installation of the controls.

Installation: No instrument to be located where they will interfere with the operation or removal of equipment. Conduits and piping to be run so as to avoid interference with access to any equipment.

Commissioning: Adjust and calibrate for sequence of operation of controlling devices in accordance with the conditions to be maintained as specified. Make any further changes and adjustments to the equipment furnished under this contract that may be necessary to ensure continuous satisfactory automatic control and operation of the air conditioning plant.

Instruction: Provide a skilled serviceman, without additional charge, to instruct the operating personnel in the operation of the controls system at arranged times during commissioning or during the maintenance period.

Checking: Make four (4) service visits at three monthly intervals during the defects liability period to check on the system operation and calibration.

Forward a detailed report after each visit.

Components: Electronic type with electric components where necessary or appropriate.

M8.4 CONTROL EQUIPMENT General Requirement: Provide a complete control system including all necessary thermostats, relays, contactors, switches, control valves, damper motors and other accessories necessary to perform all control functions.

Fire Integrity: To achieve fire integrity, select control equipment to conform to the requirements of the authorities.

Room Temperature Sensors Type: two wire temperature sensitive resistance type.

Construction: Removable blank cover with no exposed control knobs or dials.

Mounting: Mount securely on matching terminal block approximately 1500 above floor.

M8.5 FUNCTIONS AND NORMAL OPERATING SEQUENCES General Requirement: Provide the operating functions, sequencing and interlocking of the various electrical systems are described in the following subclauses.



AIR CONDITIONING SYSTEMS The apartment air conditioning system shall be controlled by integral microprocessor temperature sensor and remote control station as supplied as standard by the manufacturer. The controller shall be hard wired wall mounted control stations for each indoor fan coil unit and provide the following functions:

− On/Off

− Temperature adjustment

− Fan/cool/auto/heat mode selection

− High/medium/low/auto fan speed selection

− On/off 1 – 12 hour countdown timer

− Return air duct temperature sensor.

− Option to select either controller temperature sensor or duct temperature sensor.

− Day/Night zone change over.

Day/Night Zone Air Conditioning Day zone control shall be provided to serve living/dining areas while night zone control shall be provided to serve bedrooms only.

Motorised dampers shall be stroked to maintain airflow rates as indicated on the drawing such that percentage of conditioned air is leaked into living areas while bedroom zone is in operation.



M9 COMPLETION

M9.1 COMMISSIONING General: When the installation is complete, commission the installation by putting it into working order and operating it for at least the designated running period. Make the adjustments necessary to achieve the designated performance under continuous operating service conditions, including balancing, setting the controls, checking the operation of overload and safety devices, and correcting malfunctions.

M9.2 AIR BALANCING General: Balance air handling systems to give flow rates within +10, -0% of designated air quantities, subject to the following:

• Fans: Minimise air resistance at fans, and adjust fans to run at lowest fan speeds and power consumption.

Procedure General: Commence air balancing when air handling systems installation is complete. Clean the air handling units before starting.

Multiple systems: If there are inter-related air handling systems, operate all systems concurrently.

Filter resistance: For measuring air quantities under 'simulated dirty filters' condition, simulate a resistance across filter banks equal to the means of the initial and final resistance of the filter bank.

Dampers: Mark final position of dampers when balancing is complete.

Reports: Include the following on the air balance data sheets:

• Static pressure differentials across filters and fans.

• Air quantities at air outlets after balancing.

• Fan capacity, blade pitch, and fan speed. Show the final operating point on the fan characteristic curve.

M9.3 COMPLETION TESTS Heating and Cooling Performance Tests General: Test performance of air conditioning and heating systems, during the maintenance period, at or near winter and summer design conditions.

Performance: Record dry-bulb and wet-bulb temperatures, as follows:

• Air flows entering and leaving equipment.

• In areas containing thermostats

Motor-driven equipment performance tests: Test for performance. Adjust thermal overloads for actual load.

M9.4 ACCEPTANCE TESTING General Requirement: At the completion of air balancing, commissioning and completion tests, provide copy of all test results to be used for acceptance testing.

Procedure: Prove accuracy of test results in the presence of the Mechanical Consultant by retesting air quantities, temperatures etc. selected at random by the Mechanical Consultant.

Controls: Demonstrate correct operation of heating and cooling controls by manually altering setpoints.

M9.5 ROOM CONDITIONS At the completion of the acceptance testing the Contractor shall provide thermohydrographs to record the conditions in each air conditioned space. The graphs for each area shall be of 24 hour 7 day duration. Graphs shall be clearly marked and submitted for approval. Should any corrective action be necessary a new graph shall be recorded until such time as conditions are satisfactory.



The Contractor shall allow in his tender to obtain and submit a further set of the above temperature graphs for approval at a time to be advised but following full occupancy and during the defects liability period. Similarly, any necessary corrective action shall be made and new graphs recorded until such time as conditions are satisfactory.

M9.6 CLEANING General: At practical completion, clean the following:

• Switchgear and contactors, and other electrical contacts. Adjust as necessary.

• Air filters. Replace if the resistance exceeds the mean of the initial and final resistances of the filter bank.

M9.7 MAINTENANCE Regular maintenance: Make service visits and carry out the following procedures, as applicable:

• Service items of equipment in accordance with manufacturers instructions

• Level 1, 2, 3 and 4 maintenance routines to AS 1851.6.

• Maintain air handling and water systems.

• Check equipment items for operation, calibration, performance compliance, temperature and energy consumption, and record values.

• Check air handling and water systems for temperature, pressure, flow and leakage. Repair leaks where they have occurred.

• Check water drainage systems for unobstructed flow.

• Check drives and couplings.

• Check motors and machinery for excessive operating temperature, bearing noise and excessive vibration. Record current draw of motors.

• Check anti-vibration supports, brackets and clamps, holding down bolts and flexible connections, for deterioration and for freedom of movement of assembly.

• Check condition of insulation, and repair.

• Lubricate equipment.

• Check electrical and control systems (refer controls section of the specification).

• Record readings of thermometers, gauges, meters, current draw of motors and heaters, sample readings, control set points and controlled space conditions.

• Check refrigeration systems for temperature, pressure and gas tightness.

• Replace faulty or damaged parts and expendable components.

End of maintenance period service General: Immediately before the end of the maintenance period, carry out the following service tasks, as applicable:

• Clean cooling coil surfaces.

• Remove external scale and corrosion, prepare and repaint the affected surfaces.

Notice: Give sufficient notice so that a final inspection can be held simultaneously with the service.



CARRINGTON GATEWAY HOUSING - 90 WEROMBI ROAD, GRASM ERE

MECHANICAL SERVICES

SCHEDULE OF PRICES

The following schedules are to be completed and returned with the Tender Form and will be used in the assessment of tenderers and administration of the Contract.

ITEMISED LUMP SUM PRICE FIXED PRICE

1. Air conditioning systems $

2. Ventilation systems $

3. Commissioning and testing $

4. Painting $

5. Operating and maintenance manuals $

6. Twelve months service and maintenance $

7. Items not included in the above $

TOTAL OF ITEMS 1-7 ABOVE

$

GST

$

TOTAL (Incl GST)

$

Company: ..................................................................................................................................

Signature: .................................................................................................................................

Witness: ........................................................................... Date: ..............................................



CARRINGTON GATEWAY HOUSING - 90 WEROMBI ROAD, GRASM ERE

MECHANICAL SERVICES

SCHEDULE OF TECHNICAL PARTICULARS

The following schedule is to be completed and returned with the Tender Form and will be used in the assessment of tenders:

1 MECHANICAL SERVICES SUBCONTRACTOR Company:

Contract Engineer:

2 AIR CONDITIONING UNITS Reference No: AC–1 AC–2 AC–3 AC–4 Make: Model: Reference No: AC–5 AC–6 AC–7 AC–8 Make: Model: Reference No: AC–9 AC–10 AC–11 AC–12 Make: Model: Reference No: AC–13 AC–14 AC–15 AC–16 Make: Model: Reference No: AC–17 AC–18 AC-19 Make: Model: 5 AIR FILTERS Reference No: Make: Model:

7 SUBCONTRACTORS FOR Ductwork: Pipework: Electrical: Commissioning & Testing:

Company: ..................................................................................................................................

Signature: ...............................................................................................................................…

Witness: ........................................................................... Date: ............................................…

mechanical specification

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