Building Log Book - Beaman Technical Services · Chartered Institution of Building Services...

Do not remove from: The Facilities Office Building Log Book

Keynsham Town Hall & Civic Centre Page 1/83 Prepared by: Mike Beaman 08/05/2014

© 2006 CIBSE

Facilities manager to complete green italic sections

Building Log Book

Keynsham Town Hall & Civic Centre

15-17 Temple Street Keynsham

Bristol BS31 1HF

Facilities manager responsible for log-book: Name Signed: …………………….

Emergency contact details

This building log book was prepared by Mike Beaman – Technical Author BALFOUR BEATTY ENG. SERVICES Stratton House, 39 Cater Road Bishopsworth, Bristol BS13 7UH [email protected] Tel: 0117 983 2000

Log book version: 001 Dated: 08/05/14

This building log book is analogous to a car handbook, providing the facilities manager with easily understood information about how the building is intended to work. It also allows ongoing building energy performance and major alterations to be recorded. Please ensure that this log book is kept up-to-date and in a readily accessible (designated) position, e.g. in the main building operations room. It contains important information for anyone carrying out work on the building and its services. This log book is to be kept at all times in: Room name/no. and location in that room Electronic master is kept at: Server/PC directory name and file name



© 2006 CIBSE

Contents (Not more than one page) 1 Building history 2 Purpose and responsibilities 3 Links to other key documents 4 Main contacts 5 Commissioning, handover and compliance 6 Overall building design 7 Summary of areas and occupancy 8 Summary of main building services plant 9 Overview of controls/BMS 10 Occupant information 11 Metering, monitoring and targeting strategy 12 Building performance records 13 Maintenance review 14 Results of in-use investigations Appendix: relevant compliance and tests certificates Following the guidance and using this template should result in a ‘good practice’ building log book. If any part of the template is omitted then log book author will need to ensure that it will still meet the requirements of Building Control. This template is based on the best knowledge available at the time of publication. However no responsibility of any kind for any injury, death, loss, damage or delay however caused resulting from the use of this template can be accepted by the Chartered Institution of Building Services Engineers, the template authors or others involved in its publication. For further information about building log books, including the CIBSE guidance on the use of the template, contact CIBSE. Telephone: 020 8675 5211 or visit www.cibse.org Template © 2006 Chartered Institution of Building Services Engineers, 222 Balham High Road, London SW12 9BS Registered Charity number 278104



© 2006 CIBSE

1 Building history (Not more than one page) The log book should be reviewed annually as part of the organisation’s quality assurance system and an entry should be made for each review. Where the log book has been updated then the changed pages should be recorded.

Review date

Description of annual log book review and updates made

Pages updated or added

Facilities manager’s signature

Date

Include handover, updates and annual reviews



© 2006 CIBSE

2 Purpose and responsibilities (Not more than one page)

Purpose of a building log book This log book is an easily accessible focal point of current information for all those working in the building. It has four main functions: Summary of the building: it is a summary of all the key information about the building, including

the original design, commissioning and handover details, and information on its management and performance. In being a summary, it does not wholly duplicate or replace the O&M manuals. The log book is necessary for compliance with Building Regulations Part L2.

Key reference point: it is the single document in which key building energy information is logged. It may be regarded as the hub document linking many other relevant documents. The log book should provide key references to the detail held in less accessible O&M manuals, BMS manuals and commissioning records. It should therefore be kept in a readily accessible (designated) position in the main building operations room and should not be removed without the approval of the facilities manager.

Source of information/training: it provides a key source of information for anyone involved in the daily management or operation of the building and to anyone carrying out work on the building and its services. It will be relevant to new staff and external contractors/consultants and may play a role in staff training and induction.

Dynamic document: it is a place to log changes to the building and its operation. It is also used to log building energy performance and continual fine-tuning commissioning. It is essential that it is kept up-to-date. Alterations should only be made with the approval of the facilities manager and should be signed and dated by that person.

Further guidance on using building log books is given in the Carbon Trust’s Good Practice Guide GPG 348: Building log books — a user’s guide, available from www.thecarbontrust.co.uk. This building log book was prepared by Mike Beaman – Technical Author BALFOUR BEATTY ENG. SERVICES Stratton House, 39 Cater Road Bishopsworth, Bristol BS13 7UH [email protected] Tel: 0117 983 2000

Facilities manager responsible for log-book: Name Emergency contact details Signed: [signature] Date: [date]

Key responsibilities of facilities manager: — to ensure that the log book is correct and up-to-date at building handover and when passing it on to a

successor — to ensure that the log book is kept up to date on an ongoing basis including any changes to the building

fabric, services, operation or management — to ensure that building maintenance and energy performance are logged — to ensure that all those working in the building are made aware of the information contained in the log

book — to ensure that the log book is kept in its designated location at all times.



© 2006 CIBSE

3 Links to other key documents (Not more than one page) Document (where applicable)

Location

Emergency procedures

Facilities Office

Health and safety file

Facilities Office

Hazard register

Facilities Office

Fire safety manual

Facilities Office

Mechanical services O&M manual

Facilities Office

Electrical services O&M manual Facilities Office

Asset register

Facilities Office

Record drawings

Facilities Office

Equipment log books

In plantroom with equipment

Location could be a physical place or an electronic location on a server or web page.



© 2006 CIBSE

4 Main contacts

Emergency contact name 1 Address Address Post code Tel. no. and e-mail

Emergency contact name 2 Address Address Post code Tel. no. and e-mail

Electricity emergency contact:

Gas emergency contact name

Client contact: Mr D. Quilter - Manager BATH & N.E SOMERSET COUNCIL Northgate Hosue Upper Borough Walls Bath Somerset BA1 1RG Tel: 01225 477 739 Email: [email protected]

Architect contact: Mr A. Spall - Architect AEDAS 1st Floor, Clifton Heights Triangle West Bristol BS8 1EJ Tel: 0117 9299 146 Email: [email protected]

M&E Services Design contact: Mr S. Rushford – Consultant Design MAX FORDHAM CONSULTING ENGINEERS 42-43 Gloucester Crescent London NW1 7PE Tel: 020 7267 5161 Email: [email protected]

Quantity surveyor contact: Ms J. O’Siochain – QS DAVIES LANGDON 3rd Floor, Portwell Place Portwall Lane Bristol BS1 6NA Tel: 0117 927 7832 [email protected]

Principal contractor contact: Mr K.Kerai – Operation Manager WILLMOTT DIXON 68 Macrae Road Eden Office Park Pill, Bristol BS20 0EB Tel: 0117 934 9214 Email: [email protected]

Services contractor contact: Mr Tim Giles – Contracts Manager BALFOUR BEATTY ENG. SERVICES Stratton House, 39 Cater Road Bishopsworth, Bristol TF3 3AZ Tel: 117 983 2000 Email: [email protected]

Commissioning company contact:



© 2006 CIBSE

Main Contacts: Continued

Structural engineer contact: Mr J. King – Structural Engineer HYDROCK GROUP 7 Barossa Place Bristol Avon BS1 6SU Tel: 0117 945 9225 Email: [email protected]

Landscape architect contact: Mr Oliver Smith – landscape Designer GILLESPIES The Coach House Bagley Croft Hinksey Hill Oxford OX1 5BS Tel: 01865 326 789 Email: [email protected]

CDM coordinator contact: Mr Nick Knight – CDM Corordinator CAPITA SYMONDS LIMITED Quays Office Park Conference Avenue Portishead, Bristol BS20 7LZ Tel: 01275 840 789 Email: [email protected]

O&M and log book author: Mr Mike Beaman – Technical Author BALFOUR BEATTY ENG. SERVICES Stratton House, 39 Cater Road Bishopsworth, Bristol TF3 3AZ Tel: 117 983 2000 Email: [email protected]

Facilities management contact: Client to confirm

Maintenance contractor: Client to confirm



© 2006 CIBSE

5 Commissioning, handover and compliance Part L requires the building services systems be commissioned so that the system(s) and their controls are left in working order and can operate efficiently. Use CIBSE Commissioning Code M to develop a commissioning plan and ensure that the systems operate correctly. Commissioning overview CIBSE Commissioning Code Followed? (Yes/No) Certificate included in appendix? (Yes/No) Code M: Commissioning management YES Code A: Air distribution systems YES Code B: Boilers - Code C: Automatic controls YES Code L: Lighting YES Code R: Refrigerating systems YES Code W: Water distribution systems YES

Commissioning results

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Comments/problems? Where the answer is NO, indicate any commissioning problems or significant changes that have been made to the designs during (or as a result of) installation/commissioning, or any value engineering exercises, including any significant commissioning failures and remedial work that took place.

Power

Lighting

Security Systems

PV Installations

Boiler Plant

Heating Systems

Cooling Systems

Ventilation

Domestic - CWS

Domestic - HWS

Above Grd Drainage

Controls (BMS)



© 2006 CIBSE

Air infiltration Air infiltration test carried out consisted of the following: See APPENDIX for the Report on Envelope Air Tightness Testing by ……………………….Limited Air Permeability Test Result Target = 3.0 M3 per hour per M2 @ 50Pa Air Permeability Test Result: Room Ref: ……… = ……. M3 per hour per M2 @ 50Pa Test Date: ……………… Test Standard: EN13829 to Regulation ATTMA TS1 Insulation continuity Not required under the contract. Handover

Handover took place on: ………………………………………………… End of defects liability period: …………………………………………… The handover procedure was managed by:……………………………. The documents handed over are listed in section 3



© 2006 CIBSE

6 Overall building design General description of the building The new Town Hall and Civic Centre is located in the centre of Keynsham and is the primary element of the £33m regeneration scheme for Keynsham town centre providing a new civic centre, council offices, retail facilities & restaurants on the site of the old town hall which was demolished as part of these works. The Civic Centre building on Temple Street is a 2,000m2 (total internal floor area), two storey steel frame construction with curtain external walls with metal clad finish and fenestration panels. The screed finish concrete floors are cast in situ on permanent metal formwork. Internal walls are metal stud with double skin plasterboard to each side. Raised floors are installed to general floor areas to accommodate services distribution. The Civic Centre roof is a mono pitch roof construction with a proprietary waterproofing membrane covering. Mechanical plant items are located externally on the roof well plant area. The new Town Hall building, located between the civic centre and the existing multi-storey car park is two three storey blocks linked at 1st , 2nd and 3rd floor level. The building is a steel frame construction with external curtain laminated ply walls with metal clad finish and double glazed fenestration panels. The screed finish concrete floors are cast in situ on permanent metal formwork. Internal walls are metal stud with double skin plasterboard to each side. Raised floors are installed to the office floor areas to accommodate services distribution. The Town Hall roof is a dual pitch timber roof construction with a proprietary waterproofing membrane covering. Mechanical plant items are located externally on the roof deck area of the link block. The Civic Centre provides the following accommodation: Ground Floor Entrance Foyer & Library First Floor Assembly room, flexible space & WCs Roof Mechanical Plant & photovoltaic (PV) panels

The Town Hall building provides the following accommodation: Ground Floor Entrance Foyer, “back of house” and retail units First Floor Office areas, meeting rooms & toilets Second Floor Office areas & toilets Third Floor Office areas & toilets Link Roof Mechanical Plant & photovoltaic (PV) panels

The principal contractor for the project was Willmott Dixon, with the services installation undertaken by Balfour Beatty Engineering Services as a design & build contract.



© 2006 CIBSE

Client requirements The initial commissioning set points at completion were as follows:

External Design Temperature (Winter) - Heating -4oC 100% Sat External Design Temperature (Winter) - AHUs -4oC 100% Sat

External Design Temperature (Summer) 28oC / 20oCwb External Design Temperature (Summer) Chillers 35oC db

CHW flow/return (Town Hall) 10oC/16oC CHW buffer vessel temp (Town Hall) 15.0oC mid 12.0oC min CHW flow/return (Civic Centre) 12oC/18oC

LTHW heating Flow /return temp 80.0/60.0oC LTHW heating (Underfloor) Flow /return temp 50.0/30.0oC

Domestic hot water temp (stored) 60.0oC Domestic hot water distribution temp (min) 55.0oC Controlled tap outlets max temp 43.0oC Controlled shower outlets max temp 43.0oC

The heating load for the development is designed to be a maximum of 450kW (300kW offices and 150kW Civic Centre). The cold water pipework is insulated to limit the cold water temperature to 20oC maximum. The mains cold water service is insulated to limit the incoming mains water temperature to no more than 2oC above the incoming temperature at the outlet. Boosted cold water system is designed to operate at between 0.5Bar to 1.5Bar. A 225kW photovoltaic array of 1,250m2 has been installed on the Town Hall Offices roof area and a 50kW photovoltaic array of 275m2 has been installed on the Civic Centre. These systems are designed to be part of a range of measures incorporated into the design of the new development to limit energy use..



© 2006 CIBSE

Client requirements Continued Internal Design Temperatures:

Area: Winter oC Summer oC Notes: Offices/Library 20oC 24oC ± 2oC 8.0L/s per person FA Meeting Rooms 20oC 24oC ± 2oC 8.0L/s per person FA Assembly Room 20oC 24oC ± 2oC 8.0L/s per person FA Flex Spaces 20oC Uncontrolled 8.0L/s per person FA Cellular Offices 20oC 24oC ± 2oC 8.0L/s per person FA Core areas 18oC Uncontrolled 3.0L/s per m2 Circulation 18oC Uncontrolled 3.0L/s per m2 Toilets 18oC Uncontrolled 10AC/hr Mechanical Cleaners - - 6AC/hr Mechanical Reception 20oC Plant Areas (Internal) 10oC - Server Room 21oC ± 2oC 21oC ± 2oC Kitchenettes - - 8AC/hr Mechanical

Continued



© 2006 CIBSE

Client requirements Continued The project design lighting levels are: Room Designation: Average Lux: Open Plan Offices 500 Meeting Rooms 400 Post Room 300 Server & Hub Rooms 500 Toilets & Changing 150 Circulation 150 Stairs 150 Electrical Plantrooms 500 Mechanical Plantrooms 300 Stores 150 Entrance 300 Flex Space 500 Staff Rooms 400 Meeting Rooms 400 Assembly Room 400 Continued



© 2006 CIBSE

Conceptual design This information summarises the design for the building engineering elements of the Keynsham Town Hall development. The Town Hall Office building comprises of the following facilities: Ground Floor Entrance foyer “ back of House” & retail units First Floor Office areas, meeting rooms & toilets Second Floor Office areas & toilets Third Floor Office areas & toilets Roof Mechanical plant & PV array

The Civic Centre building comprises of the following facilities: Ground Floor Entrance foyer & library First Floor Assembly room, flexible spaces & toilets Roof Mechanical plant & PV array

General Engineering Services: The design of the new buildings has been to reduce the energy consumption as a priority. All services from the lighting system to the main mechanical plant has been designed and specified to utilise energy efficient components. Heat recovery systems have been utilised wherever possible. Additionally, and very importantly, the methods of control for all services promote energy efficiency. The design methodology for system commissioning has helped to ensure that all systems are set to operate in an efficient manner on project completion. BREEAM: As part of the design process a BREEAM assessment adapted for this type of building, with the aim to achieving an EXCELLENT rating was utilised to assist in forming the final design solution. The BREEAM post construction completion assessment is included elsewhere.



© 2006 CIBSE

Conceptual design Continued Building Envelope Performance: The Building Envelope is designed to comply with the Building Regulations Approved Document L2A (2006) including a 30 percent target improvement as indicated below:- Target U-Value (Area Weighted)

Walls 0.20W/m2.K Roof 0.15W/m2.K Floor 0.15W/m2.K Window / Glazing 1.40W/m2.K Curtain Wall (Civic Centre) 1.80W/m2.K

Roof Windows (Civic Centre) 1.40W/m2.K Building Exposure: Building exposure is as CIBSE recommendations. Cooling Allowance: The cooling allowances have been considered as CIBSE recommendations: Occupancy General 75W (Sensible) 55W (Latent) Humidity: Not controlled in any area, fortuitous de-humidification only. Infiltration Rates: Infiltration rates throughout the building have been utilised from CIBSE recommendations – generally 0.25 ACH-1 Continued



© 2006 CIBSE

Conceptual design Continued MECHANICAL SERVICES: The mechanical and public health works comprised of the provision of the following:

Incoming gas supply from site boundary A separate gas supply to the defined retail unit Natural gas distribution system

Roof mounted packaged chillers LTHW heating plant Heating/cooling distribution systems Ventilation systems Automatic control system

Incoming mains cold water from site boundary Domestic hot & cold water services Sanitaryware and above ground drainage system Rainwater collection & discharge system Dry risers

Mains Cold Water The installation of a complete mains cold water pipework distribution system has been carried out as part of these works and includes: From the existing 3” water main on Temple Street a new MDPE mains cold water service has been laid below ground (by others), this new main is metered at the NE corner of the site boundary and is routed to serve the Town Hall Office lower ground floor water plantroom, the Civic Centre and a metered connection to each retail unit as indicated on the record drawings. Directly within the site boundary, a new external check meter, located directly after the existing water authority meter with radio pulse outputs to the BMS has been provided to monitor the site mains water supply for major leak detection. A second busnet output water meter is installed where the mains water enters the lower ground floor water plantroom for building leak detection monitoring. The MCWS services rises in the ground floor of the Civic Centre where it is fitted with a stop tap, double check valve, dosing point and drain cock at floor level. The mains cold water then rises to the first floor plantroom of the Civic Centre and connects to an incoming water meter and is fitted with an in-line water conditioning unit. The mains cold water distribution pipework is routed within the first floor plantroom to serve the pressurisation unit and the hot water heater. The mains cold water service distributes horizontally within the floor and ceiling voids as indicated on the record drawings to serve the associated cold water outlets and local electric hot water heaters within the Civic Centre. Continued



© 2006 CIBSE

Conceptual design Continued Potable Boosted Cold Water: The 54mm mains water supply serves the 5,000 litres nominal capacity GRP sectional potable cold water break tank (WST01) located in the lower ground floor water plantroom. A 54mm tank cold feed from the potable cold water break tank feeds a water booster set (BS01) located adjacent to the cold water break tank. This booster set serves the boosted cold water service (BCWS) to all the cold water outlets throughout the Town Hall office building and provides the cold water feed (pre-heated via the LTHW buffer vessel) to the gas fired fully condensing, unvented, direct hot water generator located in the ground floor plantroom (boiler room). The booster set is self-contained and complete with a control panel, pressure vessel, pumps, controls and pipework header assembly. Within the lower ground floor water plantroom the boosted cold water service passes through the Culligan HE90 duplex water softener unit, which is fitted with a (normally closed) 28mm bypass. Hot Water Service Town Hall Offices: A gas fired fully condensing, unvented, direct hot water generator is located in the ground floor plantroom and generates the domestic hot water service (DHWS) to serve the hot water outlets throughout the building. A 42mm boosted (softened) cold water service is connected, via a water meter, and via an indirect pre-heater coil within the LTHW buffer vessel to the gas fired direct hot water generator. This arrangement utilises heat recovery from the heat pump units to pre-heat the cold feed to minimise gas use. The hot water generator is locally controlled and maintains a domestic hot water outlet temperature of 60oC. The domestic hot water service is circulated by a line mounted secondary circulation pump (P09). The domestic hot water circulation is balanced by use of lockshield regulating valves. These valves are commissioned and set to maintain the minimum return circulation temperature within the criteria defined in ACOP L8. The DHWS pipework is routed, via the floor voids, service risers and ceiling voids, as indicated on the record drawings to serve the associated hot water outlets. Local instantaneous electric water heaters have been installed to some areas such as tea points as indicated on the drawings. All designated hot water outlets are temperature limited by thermostatic hot water blending valves to a maximum of 43oC to taps and 43oC for the showers. Continued



© 2006 CIBSE

Conceptual design Hot Water Service Continued Civic Centre: A gas fired fully condensing, unvented, direct hot water generator is located in the first floor plantroom and generates the domestic hot water service (DHWS) to serve the hot water outlets throughout the building. A 42mm mains cold water service is connected, via an incoming main water meter to the gas fired direct hot water generator. The hot water generator is locally controlled and maintains a domestic hot water outlet temperature of 60oC. The domestic hot water service is circulated by a line mounted secondary circulation pump (P ?). The domestic hot water circulation is balanced by use of lockshield regulating valves. These valves are commissioned and set to maintain the minimum return circulation temperature within the criteria defined in ACOP L8. The DHWS pipework is routed, via the floor voids, service risers and ceiling voids, as indicated on the record drawings to serve the associated hot water outlets. Local instantaneous electric water heaters have been installed to some areas such as WCs and Kitchenette as indicated on the drawings. All designated hot water outlets are temperature limited by thermostatic hot water blending valves to a maximum of 43oC to taps. Above Ground Drainage The above ground soil, waste and vent installation has been designed and installed in accordance with BS 5572, BS EN 12056: parts 1,2,4 & 5, BS 8000 part 13, Approved Document H, Building Regulations and Local Authority requirements. All above ground soil, waste and overflow pipework is based upon the single stack principles, vented to atmosphere and has been installed generally in solvent welded HDPe pipework – Geberit to BS 4514 and BS 5255. The system design incorporates all necessary soil and vent pipework, and as indicated on the “as fitted” drawings, including rodding access points. Soil branches to WC pans are in HDP with white flex connections. Waste traps for basins and showers are 75mm deep seal bottle type and for sinks the installed traps are 75mm deep seal two piece tubular type for ease of cleaning out. Anti-syphon traps have been installed where indicated on the drawings. Where soil pipes pass through fire compartment walls or floors, intumescent fire stop collars have been installed. Overflows from appliances and sanitaryware include where applicable tundishes, viewing panels and pipework routed to discharge points fully in accordance with Building Control Officers’ requirements. Continued



© 2006 CIBSE

Conceptual design Continued Rainwater Collection & Discharge The above ground rainwater installation has been designed and installed in accordance with BS EN 12056, Approved Document H, Building Regulations and Local Authority requirements. All above ground rainwater pipework is based upon the gravity rainwater system principles, vented to atmosphere and has been installed generally in solvent welded HDPe pipework – Geberit. The system design incorporates all necessary rainwater outlets and pipework, all as indicated on the “as fitted” drawings, including rodding access points. Where rainwater pipes pass through fire compartment walls or floors, intumescent fire stop collars have been installed. Natural Gas Service The gas installation is compliant with the current British Standards for gas installations including all current IGE UP/2 Regulations, the Gas Safety Regulation No 1178. In addition the installation complies with CP331 Part 3 together with complying with Code of Practice Guidelines IM/11, 2 & 5. Where gas pipework runs through a riser, service void or enclosed space then the void is ventilated to outside to ensure and gas escape cannot build up. Town Hall Offices: The underground, external yellow MDPE gas service converts to 50mm dia steel pipe at the entry point in the ground floor plantroom. The incoming natural gas service is fitted with an isolation valve, solenoid safety valve (interfaced with the fire alarm & boiler room safety systems) and gas meter with remote monitoring and data logging facilities. The gas meter is located in the gas meter cupboard and is ventilated to outside. The meter is accessed from outside for reading by the utility company. The gas service distributes at high level within the ground floor plantroom to serve the three gas boilers and the gas fired hot water generator. Civic Centre: The underground, external yellow MDPE gas service converts to 50mm dia steel pipe at the entry point in the ground floor meter chamber. The incoming natural gas service within the ground floor meter chamber is fitted with an isolation valve, solenoid safety valve (interfaced with the fire alarm & the boiler safety systems) and a gas meter with remote monitoring and data logging facilities. The gas meter chamber and is ventilated to outside by high and low level louvred doors. The meter is accessed from outside for reading by the utility company. The gas service distributes at high level “as pipe in pipe” within the ground floor ceiling void before rising into the first floor plantroom to serve the two gas wall mounted boilers and the gas fired hot water generator. Continued



© 2006 CIBSE

Conceptual design Continued Boiler Plant The town Hall offices are served by two heat sources that are designed to provide the most efficient use of energy in delivery. The primary heat source is provided by the two heat pump units (HP01 & HP02). These heat pumps are water/water packaged units manufactured by Climavent UK Limited and located externally on the link roof plant area. In addition three floor standing, condensing, fully modulating, pre-mix, gas fired boilers located in the ground floor plantroom provide the “top up” heating as the LTHW load increases beyond the output of the heat pump units. The Civic Centre heating requirements are served by the gas fired boiler plant installed in the first floor plantroom. LTHW Heating Distribution The space heating to the Town Hall office building is provided mainly by LTHW underfloor heating circuits and LTHW perimeter trench heating elements. The heater batteries in the air handling units (AHU01 & 02) located on the ground floor of the Town Hall Offices provide tempered fresh air to the spaces served by the air handling units. The LTHW CT circuit air heater coil is designed to operate at 45oC flow and 40oC return. The space heating to the Civic Centre is provided mainly by LTHW perimeter trench heating elements. There are radiators in the stairwells and the ground floor changing area The heater batteries in the heat recovery air handling units (CC-AHU01 & CC-AHU02) located on the Civic Centre roof plant area provide air conditioned air (temperature adjustable in the BMS), to the Assembly Room on the first floor. The LTHW air heater coils are designed to operate at 80oC flow and 60oC return. All the installed heating emitters are sized to offset the heat losses due to fabric, air infiltration and ventilation heat losses. The perimeter heat emitters are served by a weather compensated variable temperature (VT) circuit by adjusting flow temperature of the boiler to ensure maximum efficiency of the condensing boiler plant. The LTHW heating system serving the building is zoned to provide control over specific sections of the building largely based on geographical zones. The zoning of the building also facilitates the usage and flexible operational requirements of the spaces, including out of hours usage for designated spaces. The LTHW heating circuits and sub circuits are fitted with differential pressure control valves (DPCV) manufactured by Hattersley Valves Limited. These valves limit the differential pressure that each control valve is exposed to ensuring that control characteristics are maintained and noise generation is minimised. The LTHW installation has been provided with local thermal heat meters to monitor and log, via the BMS the energy consumption. Continued



© 2006 CIBSE

Conceptual design Continued Chiller Plant Town Hall Offices: One air cooled “free cooling” water/air chiller and two water/water heat pump units have been installed externally on the link roof level plant area. The heat pumps primary function is to provide chilled water to satisfy the requirements of the year round cooling load imposed by the server room equipment. The heat extracted is transferred to the heating buffer vessel . In the event that there is no heating demand the “free cooling” chiller unit (CH01) will operate to satisfy the cooling load requirements. This unit operates as a “free cooling” unit whenever the outside temperature is below 9oC and as a normal closed cycle refrigeration chiller above this. Civic Centre: Two air cooled water/air chiller units have been installed externally on the roof level plant area to provide the cooling requirements for the Civic Centre Building. The chillers operate if either of the roof mounted AHUs is calling for cooling or if the chilled water stored in the buffer vessel, located in the first floor plantroom, is above 15oC. Chilled Water Distribution Town Hall Offices: The chilled water (CHW) system comprises of flow and return pipework circuits connecting the external, roof mounted packaged chiller and heat pump units to the chilled water buffer vessel located in the ground floor plantroom. Pumped circuits distribute the chilled water from the buffer vessel to the connected cooling systems. Two pumped circuits are connected from the buffer vessel and serve:

Pump set P07 – server room rack cooling equipment Pump set P08 – radiant cooling ceiling panels

Civic Centre: The chilled water (CHW) system comprises of a primary flow and return pipework circuit connecting the external, roof mounted packaged chiller units with integral pump sets, to the chilled water buffer vessel located in the first floor plantroom. A secondary pumped (CC-P01) circuit distributes the chilled water from the buffer vessel to the connected cooling system. The secondary pumped circuit connected from the buffer vessel serves:

Pump set CC-P01 – radiant cooling ceiling panels A two port valve assembly is installed to each radiant cooling panel controlled via the BMS from a local zone/room sensor. Cooling to the room is enabled by the users operating the local push ON, push OFF switch. When activated the cooling valve is enabled for a pre-set time period (fully adjustable in the BMS- one hour at commissioning). Condensate sensors are attached to the radiant cooling panels and close the valve in the event of moisture formation. All main chilled water circuits, branches and final terminal connections are fitted with flow measurement and flow regulation devices. Automatic flow regulation valves have been utilised throughout. Continued



© 2006 CIBSE

Conceptual design Continued Ventilation Systems The Town Hall Offices are predominantly naturally ventilated through perimeter ventilation openings. The natural ventilation openings are configured architecturally into vertical “strips”. These are further split into high level automatic opening vents activated via the BMS and a lower manually openable section. The automatic high level openings operate to control internal temperature and CO2 levels. The BMS also monitors summertime external temperatures and opens these for automated night time cooling during the summer months to minimise chiller operation. Mechanical ventilation has been installed to the following areas:

Server Room Local supply (SF01) and Extract (EF01 Confidential room Local extracts (EF02, 03 & 04) Kitchenette Local extract (EF17) Copy & Hub rooms Extract distribution System (EF18) Toilet extract Extract distribution System (EF19) Work space plenum Extract distribution System (EF20) Toilet extract Extract distribution System (EF21) Hub rooms Extract distribution System (EF22) Hub rooms Extract distribution System (EF22)

Two heat recovery air handling units are located at high level in the ground floor Refuse Store. These units serve the ground floor showers, post room and the police lockers /drying room on the first floor. The Civic Centre fresh air supply for the main flexible space is ducted into the building via below ground ducts from the pedestrianized market Street. The fresh air inlet is incorporated into a street bench with a weather louvre and protective mesh. The flexible spaces are naturally ventilated through perimeter ventilation grilles set within the floor. The automatic high level rooflight openings operate to control internal temperature and CO2 levels. The BMS also monitors summertime external temperatures and opens these for automated night time cooling during the summer months to minimise chiller operation. Axial supply fans located in the below floor plenums will operate to provide additional ventilation rate if the space temperature or CO2 levels indicate that the natural ventilation rate is insufficient. Mechanical ventilation has been installed to the following areas:

Kitchenette & WC Local extract (CC-EF01) Hub room Local extract (CC-EF02) Cleaners store Local extract (CC-EF04) Toilet Supply/extract Local distribution system (CC-AHU01)

Each of the two assembly rooms is serviced by its own dedicated air handling unit located externally on the Civic hall roof plant area. Continued



© 2006 CIBSE

Conceptual design Continued Automatic Control System The automatic control systems and control panels have been designed, supplied and installed by the controls specialist BUILDING AUTOMATION SOLUTIONS Limited. The system installed under these works to Keynsham Town Hall and Civic Centre, Keynsham is a ……………………………… based system. Individual motor control centres (MCCs) have been provided as follows:

MCC 1 – MCC 2

Continued



© 2006 CIBSE

Conceptual design Continued ELECTRICAL SERVICES: The electrical services works undertaken by Balfour Beatty Engineering Services comprised of the provision of the following to both the Civic Centre and the Town Hall Offices:

New incoming LV utility power supply Photovoltaic (PV) energy generation system General LV power sub distribution Uninterruptible power supply (UPS) system General Lighting installation Emergency lighting system External lighting Staff paging Public address & sound amplification Assisted alarm/call systems Aerial installation Security & access control systems Structured cabling installation Fire alarm system Lightning protection & earthing

There are four main electrical plant locations within the development. The lower ground floor plantroom next to the substation on Bath Hill houses two distribution network operator’s (DNO) cut-outs & CT chambers along with the main LV panel (MDP/0/01). One DNO cut-out and CT chamber serves the main LV panel (MDP/0/01) via a 185mm2 2x4x1c SWA/LSF/Cu cable. This main LV panel (MDP/0/01) in turn feeds the main Town Hall Office LV switchpanel (MDP/0/02) located in the ground floor plantroom via a 150mm2 2x4x1c SWA/LSF/Cu buried, ducted sub-cable. The second DNO cut-out and CT chamber feeds the main Civic Centre LV switchpanel (MDP/C0/01) located in the ground floor plantroom of the Civic Centre. This switchpanel is fed via a 150mm2 2x4x1c SWA/LSF/Cu buried, ducted sub-cable.

Incoming LV Supply The electrical power requirements for the the Town Hall Offices and the Civic Centre is metered and taken at 415V, 3 phase 50Hz AC from the new distribution network operator (DNO); ( kVA) substation located on the lower ground floor off Bath Hill - Western Power Distribution (Midlands) Tel: 0845 724 0240 The system characteristics are: Voltage: 400V/230V Frequency: 50Hz Phases: 3 Phase & neutral Demand: kVA Earthing: TN-C-S Fault: 45kA at Point of Supply Continued



© 2006 CIBSE

Conceptual design Continued Main LV Panels The main LV panel (MDP/0/01) is located in the lower ground floor LV Switchroom adjacent to the new HV/LV Substation. This panel is fed from the 275kVA DNO Cut-out & CT chamber located in the lower ground floor plantroom via a 150mm2 1x4x1c SWA/LSF/Cu buried, ducted sub-cable. The main LV panel is compliant with BS EN 61439-2, extendable at each end and having internal separation to form 4, Type 2, sheet steel cubicle, stationary type to IP31 with a paint finish to BS381C RAL 9001. The main LV panel is equipped with a main incoming isolator (1,000A) and three phase MCCBs of appropriate ratings to feed the outgoing sub-mains and final circuit distribution boards and isolators supplying large fixed loads. This main LV panel (MDP/0/01) in turn feeds the main Town Hall Office LV switchpanel (MDP/0/02) located in the ground floor plantroom via a 150mm2 2x4x1c SWA/LSF/Cu buried, ducted sub-cable. The main LV panel (MDP/0/01)is fitted with integral 200 kVA power factor correction. The de-tuned power factor correction in 25kVAr stages, is actively switched to maintain a PFC of 0.98 on the incoming supply. Transient voltage/surge protection has also been installed to this main LV panel. The main LV panel (MDP/0/02) is located in the ground floor plantroom of the Town Hall Offices. This panel is fed from the main LV panel (MDP/0/01). The panel is equipped with a main incoming isolator (630A) and three phase MCCBs of appropriate ratings to feed the outgoing sub-mains and final circuit distribution boards and isolators supplying large fixed loads. This panel serves the Town Hall Offices power requirements, the primary power supply to the evacuation lifts, all installed essential services panels and the mechanical panels (MCCP1 & MCCP3). Panel (MDP/0/01) has an “essential” services section which is fed directly from the live side of the incoming MCCB with a normally closed (n/c) buscoupler to separate the “essential” services section from “non-essential” services. The “essential” services section can be fed via a plug in facility for a future standby generator. The evacuation lifts are fed from the “essential” services section. In the event of a panel failure a secondary supply is connected to each evacuation lift from the Car Park main LV panelboard. The associated changeover devices are located within the lift shaft. The main LV panel (MDP/C/01) is located in the ground floor LV Switchroom of the Civic Centre, accessed through the Hub Room. This panel is fed from the 100kVA DNO Cut-out & CT chamber located in the lower ground floor plantroom. The main LV panel is equipped with a main incoming isolator (250A) and three phase MCCBs of appropriate ratings to feed the outgoing sub-mains and final circuit distribution boards and isolators supplying large fixed loads. This panel serves the Civic Centre power requirements, the primary power supply to the evacuation lift, all installed essential services panels and the first floor plantroom located mechanical panel (MCCP1). The main LV panel (MDP/C/01) is fitted with integral 75 kVA power factor correction. The de-tuned power factor correction in 25kVAr stages, is actively switched to maintain a PFC of 0.98 on the incoming supply. Transient voltage/surge protection has also been installed to this main LV panel. The main LV panels incorporate metering for monitoring the incoming supply. Continued



© 2006 CIBSE

Conceptual design Continued Photovoltaic Installations The photovoltaic (PV) installed on the roof of the Town Hall Offices building and the Civic Centre has been designed to produce electricity. Each PV system is designed to reduce the amount of electricity drawn from the National Grid and therefore reduce the carbon footprint of the building. The panels receive energy from the light generated by the sun and convert this into a DC electrical current. This electricity is then converted into an AC current (the standard type of electricity used in the UK). This means that a reduced amount of electricity will be bought from the National Grid. If however the system produces more electricity than the building requires at any one time this will be safely fed back into the National Grid. The Town hall Offices PV system output is approx. 225kW from the 1,250M2 array and the Civic Centre PV system output is approx..50kW from a 275M2 . Distribution Town Hall Offices: Distribution comprises of the main LV switchboard, outgoing sub-mains cables to rising bus bar end feed units, load centres (including fire alarm panels, distribution boards, motor control centres and single items of large plant) and associated containment. From the main LV panel (MDP/0/02), sub-main cables are routed via the electrical risers and distribute to serve the 3 No. riser 400A busbars, with interconnecting sub-main cables connecting to the associated final distribution boards and mechanical plant. Local distribution boards are generally located in the electrical riser shafts, plantrooms or store rooms. These local distribution boards provide small power, lighting and local equipment feeds. All non-essential wiring is in CU/XPLE/SWA/LSF copper cored cable to BS5467 installed on cable tray generally complete with separate protective conductors. All essential life safety equipment is wired in BS 7629-1 fire rated FP200 cable with red colour outer sheath. The power for open plan office areas is supplied via a clean earth power plug-in 63A busbar distribution system within the raised floor void and utilising unfused tap-offs. Civic Centre: From the main LV panel (MDP/C/01), SWA sub-main cables are routed via the high and low level containment system to serve the distribution boards and connected electrical panels. Local distribution boards are located in the switchroom, plantroom and store room. These local distribution boards provide small power, lighting and local equipment feeds. A regular series of cast-in floor boxes with both power and data outlets have been provided to the flexible spaces on the ground and first floors and the assembly room on the first floor. All main and sub distribution switchboards incorporate energy metering on the incoming and outgoing circuits as indicated on the record drawings. Pulsed outputs from all meters are terminated in a separate compartment on each switch panel. These outputs are interfaced with the BMS controls system. Continued



© 2006 CIBSE

Conceptual design Continued

General Lighting Luminaires have been installed in the positions as shown on the record drawings. The lighting system is limited to all interior spaces that require artificial lighting for visual tasks. The lighting system has been designed, supplied and installed to provide a comfortable operational working environment for the staff and visitors. Control of the lighting has been installed to provide luminance levels suitable for the activities taking place within the space. Lamp types have been selected for their efficacy, colour rendition and longevity to ensure an efficient lighting solution with a reasonably predictable maintenance regime for usual operation conditions. The lighting installation to the main areas is served by separately metered lighting distribution boards and via combined lighting and power distribution boards in the core areas. External Lighting The external lighting provides safe circulation of pedestrian, vehicular and cyclist traffic into, out from, and around the external area of the building. For all external lighting that has been installed under these works, account has been taken regarding the efficacy and the anti-light pollution requirements of the BREEAM assessment criteria along with the requirements of the Building Regulations. External luminaires have been installed under these works to serve the following areas:

Café Terrace Footpaths Park Street Market Street Car Park Access

A TP&N distribution board (DBLG-E1)has been installed in the lower ground switchroom served from the maim LV panel (MDP/0/01) to supply the external lighting. The external lighting is controlled via a single photocell and time clock. Continued



© 2006 CIBSE

Conceptual design Continued Lighting Controls Lighting control has been installed to the Town Hall Office areas and the Civic Centre to maximise the energy benefits through occupancy, daylight linking and time control. Override switches are provided to each occupied space. Emergency Lighting The emergency lighting installation has been designed to achieve a minimum illuminance on escape routes for 3 hours in the event of mains failure in accordance with BS5266, BS EN 1838 & BS EN 50172. The emergency lighting system generally comprises of self-contained, maintained (stay on), emergency versions of the specified normal luminaires complete with integral emergency battery/inverter conversion packs along with strategically positioned emergency exit signs. Emergency lighting levels are 1.0 lux average for defined escape routes and 0.5 Lux average (anti-panic) to open plan areas. A min of 15lux is provided in emergency to areas of high risk tasks to ensure processes can be completed or shut down in a safe and suitable manner. Local non-maintained (comes on) luminaires provide the illumination to the exit signs which are not internally illuminated. The emergency lighting installed is a self-test addressable type linked to the lighting control system (DALI) and provides for reporting, monitoring and assessing of emergency luminaires including fault, mains healthy etc. General Power & Distribution Town Hall Offices: The power for open plan office areas is supplied via a clean earth power plug-in 63A busbar distribution system (Legrand – Electrak range) within the raised floor void and utilising unfused tap-offs. Power to each connected desk is delivered via a purpose made desk power module consisting of four 5A individually fused single socket outlets. The desk power module is connected to the underfloor busbar via a 32A fused tap off. A separate busbar power track (yellow sockets) is installed below the raised floor with tap off sockets wired to individual raised floor single socket outlets arranged over a regular grid to provide power for the open plan office floor mounted lights. Power supplies have been provided terminated with switched or unswitched fuse connection units/isolators for the following items of equipment:

Fire alarm panels Structured and security system cabinets Security systems Mechanical services power supplies CCTV cameras Wi-Fi hubs AV fixed equipment Lifts

Continued



© 2006 CIBSE

Conceptual design General Power & Distribution Continued Civic Centre: A regular series of floor boxes with both power and data outlets have been installed to the ground floor open plan areas. All small power requirements for the reception desk are provided by BS 1363 two desk mounted 13A switched twin socket outlets.Switched socket outlets have been installed as indicated on the record drawings to serve fixed equipment. The power for the first floor flexible space is supplied via a power plug-in 63A busbar distribution system within the raised floor void and utilising unfused tap-offs. Power supplies have been provided terminated with switched or unswitched fuse connection units/isolators for the following items of equipment:

Fire alarm panels Structured and security system cabinets Security systems Mechanical services power supplies CCTV cameras Wi-Fi hubs AV fixed equipment External features Lifts

Fire Detection & Alarm System The fire alarm system is an open analogue addressable system and has been installed by the specialist installer; GBE Fire & Security to meet the requirements of BS5839 and BS9999. The system is fully automatic and compliant with category of protection L1. The system provides early detection of a fire condition with the use of heat and smoke sensors integrated with sounders and alarm push buttons (fully resettable type with key operation). Beacons have been installed in designated areas and areas of high ambient noise to provide visual alarm indication. The fire alarm system is interfaced with the following systems:

Natural gas safety shut-off valves Door controls Mechanical plant Server Room Fire Suppression System

Continued



© 2006 CIBSE

Conceptual design Fire Detection & Alarm System Continued An override key switch has been provided adjacent to the main fire alarm panel located at main entrance by reception. This override key switch isolates the interfaced systems to facilitate fire alarm testing. Repeater panels are located at Civic Centre entrance and on each floor to allow speedy checking of alerts. Control relay units used for interfacing include voltage free changeover contacts suitable to switch 230V AC circuits. These units are labelled indicating the voltage present and the location and means of isolation. An inert gas fire suppression system (1x INERGEN) has been installed in the IT room to provide additional fire protection to the server room. Access Control System An access control system has been designed, provided and installed under these works by GBE FIRE & SECURITY Tel: 01452 397 600 to provide restricted access to various parts of the building and external areas. An electronic proximity card access system (SALTO System) has been installed to all doors designated as access controlled. The installed system is compliant with existing Bath & North East Somerset (BANES) council schemes. All access controlled doors on fire escape routes automatically release upon activation of the fire alarm system – EVACUATION MODE. Security Video Surveillance System A CCTV system has been installed to the Town Hall Offices building and the Civic Centre. Cameras have been installed to provide comprehensive coverage of the perimeter of the buildings, the entrance and exit doors, main stairs and the key circulation areas of each building. External CCTV cameras incorporating high-resolution colour fully functional pan/tilt/zoom have been positioned around the perimeter of the building monitoring the external areas. The system uses video signals from various types of indoor/outdoor CCD colour cameras installed at different locations, processes them for viewing and controlling at workstations/monitors at the associated Reception Desk and records to digital video recorders. A security systems PC is located securely and has the ability to review and create CD/DVD’s of footage from the network video recorders. An interface has been provided to connect the alarm system to the digital video recorder. On activation of an external alarm device the camera viewing the zone will be displayed on the monitor in Security. All cameras are wired in CAT 6 cabling. Continued



© 2006 CIBSE

Conceptual design Continued Intruder Alarm An intruder alarm system has been installed to both the Town Hall Offices building and the Civic Centre by GBE FIRE & SECURITY in accordance with BS EN 50131. The intruder detection systems installed both utilise confirmed alarm technology in accordance with the current ACPO security systems policy. The system is designed to be easily expandable in the future. Internal sealed rechargeable batteries provide a minimum of 24 hours standby power in the event of a mains failure and are located in the main intruder control panel Independent secondary verification of intruder presence is provided by each system to minimise false alarms. The main system functions are:

Keypad operation – up to 30 user codes LCD display – programmable Programmable zone & isolation facilities Date and clock display Remote keypad interfacing Download modem Paging and SMS text facility “Duress” access code

The control panel indicates the following conditions:

Tamper Alarm Full Alarm Set/Unset Personal Attack Alarm “Duress” access remote signalling

The intruder alarm is connected via a BT “Redcare” monitored telephone line with radio back up to an alarm receiving centre. The security alarm system is interfaced with the CCTV installation so as when a door or window contact is broken and sets off the intruder alarm the CCTV camera local to that area will automatically pan and show/record all activity. Continued



© 2006 CIBSE

Conceptual design Continued Structured cabling Installation The new development has been provided with a complete CAT 6 structured cabling and containment system (SCS). The main system equipment is housed in the server room and distributes via a dedicated riser to the cable basket containment system installed within the floor void on each floor level to serve the sub-floor boxes and subsequently the desk mounted outlet modules, floor boxes or via wall mounted data outlets. The installed RJ45 outlets are twin units wired to 258A specification, shuttered and can be used for data or voice applications. The installed data cabinets comply with the following requirements:

47U openrack cabinets 800mm wide x 1000mm deep with all round access 13A fused power supply All patch & cables are Connectix Patch panels start at position 6U from the top Each 24 Port Patch panel is separated by a 1U gap All data ports are numbered and labelled

Within the ground server room IP/data connections have been provided to connect the CCTV monitor and equipment so it can be accessed remotely. An IP/data connection has been provided in the roof for connection of the satellite, Digital and DAB radio/TV signals over the CAT 6 cable system. Static IP data connections have been provided for CCTV and BMS for offsite monitoring and interrogation at the Council monitoring station.

The diverse routing of the dual redundant fibre optic backbone provides increased network security whilst the use of 8 core OM4 fibres provides future proofing and flexibility. The Class E, Category 6 structured cabling system installed will support all protocols defined in current editions, and amendments, of BS EN50173-1:2007 (including IEEE802.3ab Gigabit Ethernet), and is fully backward compatible.

Continued



© 2006 CIBSE

Conceptual design Continued TV/Radio Aerial Installation A master antennae TV/Radio distribution system has been installed under these works. This equipment serves the various TV outlets around Town hall Offices and the Civic Centre building, including all aerials/dishes, multi-switches, signal amplifiers decoders and wiring. Town Hall Offices: TV outlets are provided in the ground floor ( No), first floor ( No), second floor ( No) and the third floor ( No) to serve plasma TV screens (by others). Civic Centre: TV outlets are provided in the ground floor ( No) and the first floor ( No), to serve plasma TV screens (by others). The TVs installed in the public areas are capable of broadcasting BBC1, BBC2, ITV, CH4, CH5 and AM/FM radio stations. To view the available channels go to www.satcodx2.com/0282/eng/ BBESL Eng. to CONFIRM THIS? Disabled Refuge Alarm A disabled refuge call system has been installed to each disabled refuge location in the Town Hall Office building. A disabled refuge call system has been installed to each disabled refuge location in the Civic Centre. A master control panel (8 way) is located in the reception of the main entrance of each building and comprises of the following:

Handset telephone Function indicators Line cards Battery back up Self indicating button for each remote

An internal remote, flush, hands free disabled refuge intercom outstations have been installed at each floor location at each stairway as indicated on the record drawings. These units provide communication from the disabled refuge area with the panel at the base of the stair and main panel at the associated reception desk to provide reassurance/instruction and assistance as necessary. The enabled systems only become active in the event of a fire alarm – EVACUATION MODE. Continued



© 2006 CIBSE

Conceptual design Continued Disabled WC Call Assistance Alarm A call alarm has been installed to each accessible toilet. Each installation comprises of the following elements:

Surface mounted ceiling pull switch and reassurance light in each accessible toilet and

shower

Flush mounted reset unit with reset push and reassurance lamp.

Overdoor lamp and tone unit. Each system is fitted with a low voltage/ extra low voltage power unit located above the false ceiling. A repeat audible alarm facility is provided on the main panel located at the main reception for all the accessible areas. The panel has the facility to mute but the flashing alert remains on until the unit is locally attended and reset. The accessible areas call alarm has battery backup power supply so that it continues to operate in the event of a mains failure. Induction Loop Installation Audio frequency induction loop (AFIL) hearing enhancement systems have been installed to improve audibility levels for the hard of hearing. The AFIL systems installed include:

Reception areas Cross Counter Induction Loop System Meeting Rooms Room Induction Loop System Performance Spaces Room Induction Loop System

Each cross counter induction loop system comprises of an induction loop amplifier, a microphone and a below desk mounted induction loop. A room induction loop system comprises of an induction loop amplifier, a 100V – 0dB public address system interface and a high level induction loop contained in a conduit. This system is powered by 230V single phase AC supply. A hearing aid wearer wishing to utilise the system must first switch their ear piece to “T” (transducer), then they must be located within the area covered by the induction loop system. Continued



© 2006 CIBSE

Conceptual design Continued Earthing & Bonding The earthing installation carried out under these works has been completed in compliance with the requirements of BS7671, BS7430, the Electrical association document ref: EA41-24 and the general requirements of the IEE Wiring Regulations. The general earthing system at the point of entry to the meter installation is TN-C-S type. The earthing and bonding consists of LV system earthing, equipotential bonding of incoming services. The supplementary bonding has been carried out in compliance with the requirements of BS 7671:2008 and BS7430. Dual earth terminations have been provided in all socket outlets and each distribution board in full compliance with BS7671: Regulation 607. Separate CPCs have been installed throughout all new cable containment systems. All newly installed sub-main cable armour has been used as the CPC and where required an additional spare CPC has been installed to ensure Wiring Regulation compliance. Earth disconnection test points have been provided at the main earth bar in the electrical switchroom. The main earthing terminal bar is located adjacent to the main LV panel in the lower ground floor switchroom. A clean earth system has been used throughout the building to link back to the Server Room. An insulated clean earth bar has been installed in the Server Room and each Hub Room. The clean earth bar (EB:06) is connected directly to the main earth bar(EB:02), located adjacent to the main LV panel (MDP/0/02) and to the local earth termination point. Lightning Protection The lightning protection system is a class 4 system as detailed on the record drawings and is installed in compliance with BS EN 62305-2. The purpose of the lightning protection system is to ensure the safety of the occupants and to minimise the effects of a lightning strike to the building by safely conducting the discharge to earth without side flashing. The installation was subject to risk assessment in accordance with BE EN 62395-2 prior to design, installation and commissioning. The air termination network is formed by 25mm x 3mm PVC coated copper conductor tapes and suitable termination/connections to metal the earth grid formed by linking the roof perimeter. On the roof areas all metal supports, equipment, handrails, flues and roof mounted plant are bonded to the roof earth grid to provide a proven continuous path. The vertical steel cladding rails have been utilised as down conductors with bonds top and bottom. 25x3mm PVC coated copper conductor tapes have been bonded to the steel cladding rails at high level. The system is earthed through mechanical connection to the reinforced concrete pile foundations. Earth termination points have been installed around the perimeter of the building. The earth terminations have been formed with copper tape links to …? No 1500mm long earth rods. Continued



© 2006 CIBSE

Conceptual design Continued Mechanical Services & Equipment Power Supplies Power supplies are provided to and terminated at the mechanical services control panels located in the Town Hall ground floor plantroom and the Civic centre first floor plantroom. The main supplies to the extract fans, local water heaters etc are derived from the associated local distribution boards.



© 2006 CIBSE

Special design features The special design features utilised include: The building envelope U values are designed with a 30% improvement to the requirements of the Building Regulations Approved Document L2A (2006). Central heating plant which incorporates chiller heat pump recovery (to the LTHW pre heat buffer vessel) three high efficiency gas fired boilers provides the heating to the building for local heating. Domestic hot water generation is by high efficiency gas fired condensing hot water generators supplied with conditioned water to limit limescale formation . All plant is controlled via the control (BMS) system with a central monitoring facility. Lighting is controlled to maximise daylight and automatically switch off lighting in unoccupied areas by use of presence detectors. Lamp types have been selected for efficacy, colour rendition and longevity to ensure efficient and economic use and associated maintenance costs. Heat recovery via the plate heat exchanger on the main air handling units. Variable speed drives are installed to fan and pump motors. Daylight control to external lighting with timed control. Metering strategy adopted throughout the buildings. BMS monitoring throughout for energy saving. The buildings have a high thermal mass and good insulation levels to maximise the time lag of solar gain, delay the transmission of heat to the internal areas and thus minimise cooling load and cost. Use of free cooling via natural ventilation and/or mechanical ventilation when available.



© 2006 CIBSE

Design assessment Where appropriate, insert a summary description of the Part L2 design assessment of carbon emissions method or whole building method.



© 2006 CIBSE

Key interactions The key interactions include: Presence detectors ensure that the lighting in unoccupied areas is switched OFF. A “dead-band” is set in areas where comfort cooling is installed to ensure that the heating is OFF before the comfort cooling system is energised ON.



© 2006 CIBSE

Benefits and limitations of the design A summary of the main benefits of the design regarding operability, flexibility and energy efficiencies:

Artificial lighting is provided throughout the building through the use of high frequency fluorescent luminaires. Automatic lighting control in the form of localised presence detectors has been provided where practical. These will turn ON the lights automatically as you enter the room and then leave the lights ON for a prescribed period once you leave prior to switching off automatically.

The underfloor heating in each room is independently controlled by wall mounted thermostats.

Thermostatic radiator valves (TRVs) are installed where radiators are provided in refurbished areas.

The external lighting is controlled by daylight sensing photocells to ensure that the lights are

not energised during daylight hours and an integral timeclock to switch off lighting out of hours when not required.

Localised extract ventilation systems (e.g. toilets) are generally controlled via PIR sensors to

ensure that they only run when the space is in use.

Variable speed pumps and fans have been installed to assist the commissioning process and ensure that the final volumes can be adjusted to closely match the design values.

Plate heat exchangers have been provided on the air handling unit to recover some heat

energy from the return air and help temper the incoming fresh air supply.

The building is fitted with opening windows which are utilised for cooling by natural ventilation.

Cooling plant incorporates heat recovery to the LTHW system to minimise gas use by boilers.

Free cooling available via air cooled chiller unit when external conditions are suitable to minimise power usage by refrigeration plant.

Photovoltaic systems installed to the Town Hall Offices and the Civic Centre to minimise

electrical power drawn from the grid. Electrical power generated at times of low energy use can be fed into the grid and creates a “positive” energy use.



© 2006 CIBSE

Benefits and limitations of the design Main Benefits of the Design:

The primary heating plant is centrally contained in plant areas thereby reducing the maintenance burden on the staff.

The local modular gas fired boilers provide robust, resilient and efficient source of heating for the building.

Underfloor trench heating is ideally suited to a public access environment as it is concealed from view.

The hot water high efficiency gas fired hot water generators installed significantly increase the output. As a consequence the storage vessels are smaller and standing losses are minimised.

Where possible the services have been prefabricated in a factory and delivered to site as a packaged unit (e.g. plant areas). The main advantage this offers is greater control over the quality and coordination of the installation.

Standardisation of plant and system components.

High level of control and remote monitoring through the Building Management System (BMS Controls).

Twin compartment cold water storage tank enables the tank to be services/cleaned without disrupting the water supply.

The installed meters provide an accurate indication of how the building uses water and energy, (space heating, domestic hot water, AHU heating etc.).



© 2006 CIBSE

Benefits and limitations of the design Main Limitations of the Design:

The mechanical ventilation systems are not provided with any humidification plant therefore internal humidity levels are likely to fluctuate, but within the accepted range of 30 to 60%.

Increasing the occupancy density beyond the design value (refer to the room data sheets) and during some community events may result in local overheating problems and a reduction in air quality.



© 2006 CIBSE

Key ‘dos and don’ts’ DO: Keep heat generating equipment away from thermostat positions. Ensure thermostats are free of obstruction (e.g. furniture). Adjust plant operating hours via the BMS to minimise energy costs. Check the BMS regularly for alarms and log the energy consumption. Monitor the

energy consumption for irregularities and investigate any anomalies. The mechanical and electrical systems have been designed and commissioned to

achieve the control set points stated in the engineering services specification. Try to avoid any further adjustment of regulating valves, control dampers, speed settings on fans/pumps etc as this is likely to unbalance the system and lead to a reduction in performance.

Carry out routine planned preventative maintenance (PPM) of the installed systems and

service the plant and equipment in accordance with the manufacturer’s recommendations. This will optimise the performance of the systems and reduce the risk of problems occurring in the future.

Leave the mechanical control panels in AUTO mode. Use internal shades to limit solar gain and sunlight glare. Check lighting controls operation from time to time to ensure the system is functioning

properly. Only manually switch on lights that you need switch OFF when finished. Report failed lamps, faulty or inoperable equipment. Switch off and unplug electrical equipment when not needed. Enable energy saving features on PCs, printers, etc. Ensure heating thermostats and thermostatic radiator valves or AC controls are set

correctly.



© 2006 CIBSE

Key ‘dos and don’ts’

DO NOT: Wedge doors open. Alter or erect new partitioning without due consideration of the supply and extract air

delivery systems. Block radiators (where fitted), floor heating grilles or ventilation grilles with furniture or

files as this may result in a lack of heating/cooling and ventilation. Overheat/overcool your space as this is wasteful, increasing running costs, causing

higher than necessary emissions of CO2. Use thermostatic radiator valves or room sensors as ON/OFF valves for the heating

system (underfloor heating or radiators). Adjust the operation set point on the BMS unless it is necessary to do so. Always check

any adjustments proposed with the appropriate specialist. Operate plant beyond necessary operating hours - Even half an hour of energy saved

will add up over a year!!



© 2006 CIBSE

7 Summary of areas and occupancy Occupancy and activities The total number of occupants in the building is ……….. (based on core hours of use) The table below indicates the usage pattern used in the services design of the building. Occupancy and activities

Main occupied areas Weekday hours

Saturday hours

Sunday hours

Total hours/week

Flextime (Yes/No?)

Late working sometimes (Yes/No?)

No. of occupants

Insert a summary of the main activities in each different zone of the building. Insert a summary of the likely occupancy patterns including numbers of people and occupancy periods.



© 2006 CIBSE

Floor areas The total floor area of the Town Hall building is …………m2 (based on gross floor area)

% of total area by servicing system Total %

Total area (m2)

Area type Untreated (%)

Naturally ventilated

(%)

Mechanically ventilated

(%)

Mixed mode (%)

Heating and cooling only (%)

Full air conditioning with humidity

control (%)

Reception Server/hub rooms Office areas Circulation/stairs Toilets Plant areas Retail Units Total % 100%

Total area (m2)

Tenancies Retail Unit #1

Separately managed and special areas Floor plans Refer to the Health & Safety File for the architectural drawings

Do not remove from: The Facilities Office

Building Log Book - Beaman Technical Services · Chartered Institution of Building Services...

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