Particular Description Of Engineering Services For

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PARTICULAR DESCRIPTION OF ENGINEERING SERVICES FOR CRANWELL HOUSE REDEVELOPMENT BATH QED Engineers Ltd The Mill House Tarnock Axbridge Somerset BS26 2SN Tel: 01934 751100 Fax: 01934 751111 Job No: QD2500\B\descserv04 (Stage D) Date: 16th January 2012 PARTICULAR DESCRIPTION OF ENGINEERING SERVICES FOR CRANWELL HOUSE REDEVELOPMENT BATH Contents Section A - Preliminaries Section N - Furniture/Equipment Section R - Disposal Systems Section S - Piped Supply Systems Section T - Mechanical Heating Systems Section U - Ventilation/Air Conditioning Systems Section V - Electricity Supply/Power/Lighting Systems Section W - Communications/Security/Control Systems Appendices - Appendix 1 - Schedule of External Luminaires QED Engineers Ltd The Mill House Tarnock Axbridge Somerset BS26 2SN Tel: 01934 751100 Fax: 01934 751111 Job No: QD2500\B\descserv04 (Stage D) Date: 16th January 2012 QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 1 ----------------------------------------------------------------------------------------------------------------- SECTION A - PRELIMINARIES/GENERAL INTRODUCTION This document has been compiled using the QED Standard Specification. The document identifies the level of specification for the building services, & follows the model of the National Engineering Specification [NES] Standard Clauses, to identify the basis of the “Brief” for the services installations. The redevelopment works consist of two main elements, the refurbishment of the existing 2-storey Georgian House, and the erection of a new-build extension which is to be erected to the rear of the existing house. Assumptions have been made in the completion of this stage of the design development, which may be subject to change as the brief/design is developed. The services as outlined within this document are those required, or considered to be required, to satisfy the appropriate Regulations, and those reviewed with the Project Architects, Messrs Feilden Clegg Bradley Studios. It is generally accepted that due to age and physical deterioration, none of the existing engineering services within the main building are suitable for retention/re-use. Appropriate energy efficient systems shall be incorporated, but which shall be sympathetic to the nature of the existing building, landscape, and ecology. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 2 ----------------------------------------------------------------------------------------------------------------- SECTION N - FURNITURE/EQUIPMENT N20 SPECIAL PURPOSE FIXTURES/FURNISHINGS/EQUIPMENT Fixtures & Fittings: Fixtures & fittings, included fixed items of furniture and sanitary ware generally will be supplied as part of the architectural package, within both the existing property being refurbished, and the new-build extension, which is to be erected to the rear of the existing house. Where services are to be terminated into apparatus (e.g. sinks, taps, whiteboards, etc) which are incorporated within, or fixed upon, the fixtures & fittings, the methods of connection to the apparatus shall be as described under the appropriate service connecting to the particular item of apparatus. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 3 ----------------------------------------------------------------------------------------------------------------- SECTION R - DISPOSAL SYSTEMS R11 FOUL DRAINAGE ABOVE GROUND Complete single stack soil and waste system to BS EN 12056 shall be installed to all items of sanitary ware. All stacks shall be in UPVC and branches shall be UPVC or MUPVC. The system shall include for all overflows etc. All sanitary systems shall be completely internal to the building envelope/s, care being taken to avoid exposed service pipe runs. This latter criterion shall be expressly pursued within the existing listed building, to obviate conflict with the present finishes. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 4 ----------------------------------------------------------------------------------------------------------------- SECTION S - PIPED SUPPLY SYSTEMS S10 COLD WATER An upgraded mains water service shall be provided to serve the building. The new service shall be connected to the Wessex Water main infrastructure currently serving the local environs to the Site. The underground pipework shall be in MDPe, and shall be installed strictly in accordance with the requirements of Wessex Water. The mains service shall be used to serve directly all drinking water positions within the building. The internal pipework shall be installed in copper to BS EN 1057-R250. A separate branch from the mains cold water make-up service shall be installed to serve a storage cistern designated for all kitchen and ablution supplies. The cistern shall be a two section, externally insulated unit complying in all respects with the “Water Supply (Water Fittings) Regulations 1999”. From the cistern, a boosted cold water service shall serve all water outlets in the kitchen and toilet areas. The booster shall incorporate duplicate inverter driven pumps and fully automated controls. The boosted cold water service shall also serve the hot water generators. The boosted service connection to the hot water generators, shall be complete with a magnetic water conditioner, to mitigate against mineral scaling of the hot water systems. S11 HOT WATER The water systems shall be fully compliant with “Approved Code of Practice and guidance 2000”, C.I.B.S.E. „TM 13‟, and BREEAM „HEA 12‟. The hot water shall be generated in proprietary stainless steel, fast recovery, tank-in-tank calorifiers, served by the LTHW system. The system may be regularly sterilized by boosting the water temperature to eradicate legionellae bacteria. All hot water services shall be installed in copper pipe to BS EN 1057-R250, to serve all outlets. Local blending valves shall control the hot water outlet temperature on taps to not more than 43oC, except in the kitchen areas where 65C shall be employed. The hot water secondary return shall commence from adjacent to each blending valve. The flow for the hot water secondary return/s shall be controlled by use of regulating valves all as „Oventrop Aquastrom T Plus‟ capable of providing:Hydraulic balancing/regulation – identifiable with visible markings Adjustable thermostatic regulation suitable for locking on setting Automatic pasteurisation between pre-set temperatures Isolation QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 5 ----------------------------------------------------------------------------------------------------------------Temperature measurement Drain-down S32 NATURAL GAS A new underground gas service shall be provided from the present local infrastructure. All new underground pipework shall be in MDPe. The meter shall be located at the south end of the Site/building, in a position to be agreed, with suitable landscaping/screening of the meter housing. All above ground gas services shall be installed in copper pipe to BS EN 1057 R250, to serve the gas-fired plant including boilers and/or hot water generators. The gas service shall incorporate an electronic solenoid valve, linked to shut down the gas service in the event of activation of the building‟s fire-alarm system. S34 SERVICE DUCT TO NEW BUILDING A new below ground services duct is proposed between the existing Georgian House, and the new extension. The new services would emanate from the basement plantroom within the Georgian House, with services routed from the basement of the existing building, rising within the Caretakers Office to high level on the ground floor and then routed horizontally via the ceiling void within the Orangery before dropping to low level into a new below ground services duct within the corner of the Orangery, and hence routed within a sealed below ground services duct to the new extension. The new duct and services route would accommodate the heating mains, water mains, electricity supply, telephones/data cabling, fire alarm & ancillary cabling serving the new extension. Where the services enter/exit the existing building, the services shall be installed under licence, during the summer months of the hibernation roost period for the bats, and all service entry/exit points shall be sealed to ensure stable air conditions and avoid draughts/sudden changes in air temperature within the basement. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 6 ----------------------------------------------------------------------------------------------------------------SECTION T - MECHANICAL HEATING SYSTEMS T31 LOW TEMPERATURE HOT WATER HEATING The basic option considered for the heating systems, is a system being generally as follows:- GAS-FIRED BOILERS SERVING BOTH BUILDINGS Gas-fired condensing boilers, located in the basement area of the existing building would be the primary heat source/generation plant. This plant would also serve as the heating source for the new building, the heat being distributed via an underground duct which serves to link the two buildings. The flue/s to the boilers would rise to roof level via an existing builderswork shaft. The LTHW heating system would comprise of packaged gas-fired condensing boilers with fully insulated casing, and including not less than fully modulating burner/s (down to 16%), variable speed inverter driven pumps, expansion vessel, auto top-up, and fully insulated concentric flue/s. The boilers would serve a system of LTHW radiators to the existing building and underfloor heating to the new building. The boilers would also serve the DHW generating plant. The distribution pipework would be installed in copper pipework to BS EN 806 Parts 1 to 5. All L.T.H.W. pipework installed in concealed areas, and in the boiler room, would be insulated with foil faced mineral wool insulation. Pipework installed in exposed areas would be finished with two coats of paint to match the colour of the local decorations. All radiators would be fitted with automatic thermostatic control values, in addition to the circuit being weather compensated. Manifolds to underfloor heating zones would be served from the 45oC LTHW installation. From each manifold sufficient individual circuits to serve the various zones would be provided. Each circuit/zone would be complete with its own two port control valve and temperature sensor. The underfloor heating would be complete with all screeds, thermal insulation, pipeclips/spacers, membranes, sensors, control valves, bypasses etc to form a complete installation, including local temperature control for each individual space. The L.T.H.W. system would have fully automated control/s to facilitate independent operation of the heating and DHW systems, to both buildings, together with weather compensation for maximum efficiency. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 7 ----------------------------------------------------------------------------------------------------------------SECTION U - VENTILATION/AIR CONDITIONING/SYSTEMS U10 VENTILATION Most areas of both the existing and new buildings shall employ natural ventilation. Mechanical toilet ventilation systems would be provided to achieve not less than 10 No. air changes per hour to the toilet zones and other sanitary areas. A mechanical ventilation system, serving a proprietary canopy over cooking ranges would also be included as part of the ventilation systems. Where suitable, heat-reclaim, possibly in the form of plate heat exchange or run_around coils, would be employed. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 8 ----------------------------------------------------------------------------------------------------------------- SECTION V - ELECTRICITY SUPPLY/POWER/LIGHTING SYSTEMS V20 LV DISTRIBUTION The redevelopment would be provided with a new low voltage distribution system, which would include the provision of a new low voltage switchboard serving the development, the electrical loading of which will be up-rated to serve the electrical loading of the building services to the existing house, and new two-storey extension. A new electricity supply, to replace the existing utility company electricity supply would be established to serve the new electrical distribution systems within the buildings. The new supply shall be rated to suit the total loading of the buildings, including those areas of the new 2-storey building. The original electricity supply & meter shall be removed as part of the works for the new metered supply. The new Utility Company supply shall be provided by Western Power Distribution, and comprise of a low voltage metered supply of 400 volts, 3-phase, 50Hz, rated at 215KVA, this being the estimated total load for the development as a whole, including some 10% notional spare capacity for future growth/loadings within the building/s. The new supply shall be established to terminate within a new LV Switchroom, which shall be erected within the existing basement of Cranwell House, which will be established as part of the refurbishment works for the existing Georgian property. The Supply Authorities new LV cabling shall be routed underground, and within ducts, entering the existing basement of the building passing through the external wall of the building to terminate at the new electricity meter and cut-out located within the electrical meter room which will form part of the basement Plantroom within the building. The new main distribution panel, ref MLV1, serving the development shall be a floor mounted, cubicle type switch-panel constructed to BS EN60439-1, to Form 4a, type 2 separation. The switchboard shall be provided with a non-auto moulded case circuit breaker (MCCB) to isolate the incoming Utility Company electricity supply serving the building. MLV2, serving the new extension shall be similarly constructed. Protection to outgoing sub-main distribution from each of the LV Switchboards shall be via moulded case circuit breakers (MCCB‟s). Each outgoing way from the LV switchboards serving lighting/power/mechanical plant loads, etc, shall be separately metered, for energy usage, in accordance with local building regulations. Sub-mains cabling to distribution boards and mechanical plant, etc, within the building shall generally be via XLPE/SWA/LSF type armoured cables installed on galvanised cable tray/ladder racking. Sub-mains distribution serving switchboard MLV2 located within the new 2-storey extension, shall be via a PVC/SWA/LSF type armoured cable installed in a cable trench between the two buildings. Distribution boards shall be MCB type and complete with hinged, lockable cover doors and integral switch disconnector. Each area/floor within each building shall be separately served via a dedicated local distribution board, which shall serve the requirements of the lighting & local power circuits within each area of the building/s. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 9 ----------------------------------------------------------------------------------------------------------------V21 GENERAL LIGHTING The lighting installations within the areas of the building being fitted-out shall be designed to CIBSE Codes for Lighting 2002 & 2004 to provide the following illumination levels:Area Classroom Areas Circulation Areas Toilets Plant Areas/Store Rooms Stairs Office Areas Target Illuminance 400 – 450 lux average 200 lux average 200 lux average 200 lux average 100 lux on tread 300 lux average In class rooms, office areas, etc, where computer screens are regularly used the lighting design shall comply with the CIBSE Lighting Guide 7, sections 3.3, 4.6, 4.7, 4.8 and 4.9. The lighting installation within classrooms, etc shall generally comprise suspended linear fluorescent up/down lights luminaires. The housing of the luminaires would be welded sheet steel with white powder-coat finish, and low glare lens/diffuser panel. Fittings shall be supported via lightweight wire suspensions/pendants, and upward light shall be via a toughened polycarbonate lens to the rear of the fitting. The luminaires shall generally be suspended 1500/1800mm long x 150mm wide, high frequency fluorescent low energy (T5) type, with surface fixed fluorescent, high frequency, low energy compact fluorescent fittings provided to store rooms, toilet areas, and the like. Final circuit distribution to the lighting in the existing house shall be via a concealed wiring system comprising 6242B twin & earth low smoke & fume (LSF) cables, concealed within the building fabric (e.g. floor/ceiling voids between joists), with cable drops to switches protected via high impact concealed plastic conduits. The system shall be designed incorporating switching to not less than part L1E of the Building Regulations. Within class rooms, offices, and the like, the provision of automatic switching, incorporating presence detection & automatic daylight linking would be encouraged. In the new building circuits would be wired in single core cables in galvanised conduit/trunking installed as a flush installation. Final connection to luminaires shall be via plug-in connectors and heat resistant flexible cord from ceiling roses mounted adjacent to the luminaire, or concealed in voids. Luminaries in Plantrooms would be mounted directly on, or adjacent to conduit boxes, with final connection via heat resistant, flexible cables from a fixed terminal block.All luminaries provided to plasterboard ceilings would be complete with pattress plates and fixing springs suitable for the ceiling. Wiring shall be carried out in a loop-in system for circuits above plasterboard ceilings. It shall be ensured that all control gear, lighting control equipment, emergency lighting equipment and suchlike associated with luminaires shall be installed in accordance with manufacturer‟s instructions and in such a way that it can be accessed either directly or via the cut-out for the luminaire in plasterboard ceilings. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 10 ----------------------------------------------------------------------------------------------------------------V22 GENERAL LV POWER Final circuits shall be wired from local distribution boards serving each of the individual class room, and office area, etc. Distribution boards serving general purpose power outlets within all areas shall be composite type, serving both lighting & power final circuits, including power to the core areas for portable equipment and water heaters, etc. Circuits serving cleaners sockets, and water heaters, etc, shall be wired on a ring main basis with RCD protection. The general LV power installations shall consist of switched and unswitched socket outlets, switched fused connection units, double pole switches and local isolators for supply of fixed and portable equipment. Final circuits within the existing Georgian House shall be wired in LSF insulated twin and earth (6242/B) cables installed within the floor and/or ceiling voids as a concealed installation. In the new building circuits would be wired in single core cables in galvanised conduit/trunking installed as a flush installation. Cabling and protective device shall generally comply with the following parameters:      20A MCB‟s - 4.0mm2 Conductors 32A MCB‟s - 2.5mm2 Conductors - Ring Circuits 32A MCB‟s - 6.0mm2 Conductors - Radial Circuits 45A MCB‟s/Fuses - 10mm2 Conductors 63A MCB‟s/Fuses - 16mm2/25mm2 Conductors 80A MCB‟s/Fuses - 25mm2/35mm2 Conductors All cables shall be LSF insulated, except where serving outside equipment, e.g. external lighting, where outer insulation shall be PVC. All accessories shall generally be flush fixed, as manufactured by MEM Delta Electrical Ltd, or equal and approved, and shall be finished in white plastic, including socket, spurs, fan isolators, telephone outlets and such like, to match the general lighting switches. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 11 ----------------------------------------------------------------------------------------------------------------V40 EMERGENCY LIGHTING Emergency lighting would be provided throughout the building comprising three hour duration, sustained emergency luminaires. Emergency luminaires to all class rooms, offices & general areas shall be incorporated into the spine of selected general luminaires serving the individual areas, and operate via a battery & inverter to illuminate the lamp of the general luminaires. New maintained illuminated exit signs would be provided to all corridor & exit routes within each of the buildings. The emergency lighting system shall be provided to meet the requirements of BS 5266, and the local Building Control Officer. V41 EXTERNAL LIGHTING External lighting would be provided to illuminate the car park, driveway, and footpaths within the development. Additional supplies for 2 No sets of electric gates, to the lower & upper entrances/driveways shall also be provided, together with electronic keypads, and buried sensing loops on the exit routes on the approaches to the gates. The external lighting would generally be automatically switched via contactors serving the various circuits which would be controlled via a master time clock to switch on/off the lighting to suit the operational hours of the School. The external lighting shall be overridden via a photocell to hold off the lighting until dusk, and then switched off via the time clock. A simple override control would be provided, in a location to be agreed, to extend the operating hours of the timed controls notionally between 1 to 4 hours for extended evening occupancy/use of the school outside the normal operational hours of the school. The external lighting installation would comprise 900mm low level bollard lighting to the front & rear driveways and main pedestrian footpath around the western side of the main Georgian House. Elsewhere, and particularly around the new extension and courtyard to the rear of the main Georgian House where it has been established that bat colonies roost within part of the existing Georgian building, the main pedestrian routes/footpaths would be illuminated utilising low energy LED lights mounted within the pathways to provide low level illumination directly onto the pathways and entrances together with brick-lights recessed within the risers of external steps, to illuminate the steps. It has considered that the use of low energy LED lights mounted within the pathways to provide low level illumination directly onto the pathways around the new extension and courtyard to the rear of the main Georgian House would not cause any direct disturbance to the bat colonies that roost within part of the existing Georgian building, nor interfere with direct flight paths of the bats to/from their roosts. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 12 ----------------------------------------------------------------------------------------------------------------External lighting to the bin store and subsidiary areas shall be controlled via local PIR switching, for energy conservation, and to avoid disturbance to the flight paths of the bats entering and/or exiting to/from their roosts. The external lighting would generally be designed to comply with the CIBSE Code of Practice Lighting Guide No 6 for Exterior Lighting but with illuminance values selected to suit the requirements of the site to ensure minimum disturbance to nesting bats. In particular, the following illuminace values have been calculated/selected for the following areas for the low level bollard lighting to comply with the site‟s particular requirements:Main driveways – (Bollards 15m apart) – 6.6 Lux average / 0.6 Lux minimum Pedestrian Pathway – (Bollards 10m apart) – 8.4 Lux average / 1.5 Lux minimum Ref BB brick lights – 50 Lux on treads average / 0.6 Lux minimum on risers Ref CC LED lights – 2.5 Lux average on path / 0.5 Lux minimum at ground level. The lighting types have been selected to ensure all light emissions are downward onto the ground from the low level bollards, or horizontally across at ground level from the LED ground lights, to ensure minimum disturbance to the fight paths of bats. Lighting to the steps in and around the rear of the Georgian House shall be controlled via presence detection, to minimise the impact of any lighting in the areas of the bat roosts. Selected/alternate fittings of the LED lighting to the pathways and/or footways to the new extension and external courtyard to the main Georgian House would be provided with battery back-up, via a small inverter, to provide escape lighting to the escape pathways from the building. The existing external luminaires on the external elevations of the main Georgian House would be removed, and the existing stonework made good. In respect of the main floodlight to the front of the property which serves the car park & front steps, this would be replaced by a new, energy efficient floodlight. Details of proposed external luminaires are included under Appendix 1 of this report. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 13 ----------------------------------------------------------------------------------------------------------------- SECTION W - COMMUNICATIONS/SECURITY/CONTROL SYSTEMS W10 TELECOMMUNICATIONS New structured wiring installations would be provided to the Client‟s requirements. Full wiring pathways would be installed throughout the ceiling voids of the buildings, emanating from the main comms/IT room in each building, to serve outlets either within multi-compartment trunkings, or hard-wired into individual outlets mounted on walls or within the desk furniture, as appropriate. Within classrooms wiring would be provided on perimeter walls, to serve White Boards, etc, with the power and data wiring dropping/emanating from the ceiling void wiring pathways, to wall mounted outlets. W40 SECURITY SYSTEMS New security installations comprising access control to selected doorways, intruder detection system for each building, and monitored video entry/phone with remote gate/lock release to each of the 2 No entrance gates from Weston Park East. W50 FIRE DETECTION AND ALARM A new fire alarm and detection system would be provided to serve all parts of the buildings, to category L1, including automatic sensors, manual call points, electronic sounders, loop isolators and interface units as required to serve all areas within the building, and new extension. The fire alarm system would also be interfaced with mechanical control systems to automatically operate ventilation plant and fire dampers provided to the building, under fire conditions, and to shut-off the solenoid valve on the building‟s gas service. Where required, the fire alarm system would be utilised to provide class change alerts, utilising a different electronic tone, and interconnected to the school‟s class change system. The new fire alarm and detection system would be provided to the building in accordance with BS 5839-1:2002 + A2:2008, and all other relevant parts, and the requirements of the local Fire Prevention Officer/Building Control. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 14 ----------------------------------------------------------------------------------------------------------------W52 LIGHTNING PROTECTION The existing building and new extension would be assessed to check if a lightning protection system is required to be provided to the building. Where required the system would be provided in accordance with BS EN 62305- Part 1:2006, including the relevant sections/clauses of parts 2, 3 & 4 of the standard. The Contractor would be required to select a Specialist from an approved list of nationally recognised steeplejacks and/or earthing specialists. Any proposed lightning protection system would be required to utilise the metallic components of the building wherever possible, or provide direct down conductors to achieve the required impedances and ensure an economic solution. The air termination network of the new building would be bonded to the structural steelwork of the building, and interconnect to the earthing arrangement using grey PVC sheathed 25mm x 3mm aluminium lightning conductor tape secured to the building structure using proprietary fixings. Tapes on the existing building would be surface fixed and concealed wherever possible, i.e. behind rainwater down pipes. W51 EARTHING AND BONDING Within all areas of the buildings a new secondary earthing system to all new mechanical and electrical installations, etc, would be provided in accordance with the current I.E.E. Wiring Regulations (BS 7671, 2008), including all amendments. The new installations within each building would emanate from the main earthing bar installed adjacent to the new distribution boards within the Main House ref. MLV/1, and within the new extension, adjacent to MLV/2. Each earth bar would consist of a 600mm long x 25mm x 6mm hard drawn copper bar, mounted on 2No. insulated supports, to provide a minimum of 30mm clearance at the rear of the bar. Main equipotential bonding would be carried out, within each building via LSF insulated, stranded copper conductor cables, which shall be sized as the current I.E.E. Wiring Regulations (BS 7671, 2008). All connections shall be via tinned copper compression lugs and proprietary earth clamps. W60 CONTROLS Controls wiring, & associated electrical installations, shall be provided in full compliance with the current IEE Wiring Regulations (BS 767, 2008), including all amendments. The installations shall include for every mains voltage circuit to be provided with a means of isolation from each of the live supply conductors, to each item of plant. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 15 ----------------------------------------------------------------------------------------------------------------The means of isolation shall include isolation in respect of mechanical maintenance, emergency switching and load isolation switches. The isolation device shall be positioned to be readily operated in the event of an emergency and shall be positioned within 2000mm maximum of the equipment for which it provides isolation. A radial system of cabling shall be routed from the mechanical services control panels, BMS Panels, and/or local distribution boards to the individual loads. The wiring requirements shall be coordinated with the mechanical contractor for details of the power wiring requirements to each individual item of plant. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 16 ----------------------------------------------------------------------------------------------------------------- APPENDIX No 1 Appendix 1 – Schedule of External Luminaires This schedule should be read in conjunction with the description for the external lighting installations as detailed on under Clause V41 on page 11 of this Description of Services, and the detailed lighting layout as shown on drawing No QD2500/PLAN/E001. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 17 ----------------------------------------------------------------------------------------------------------------QP120 SCHEDULE OF LUMINAIRES Ref: AA (Driveways & Main Pedestrian Pathway) Description 940mm high ground mounted bollard with 50 watt Sodium lamp, with die-cast aluminium body, finished grey, with 45o internal reflector with polycarbonate sleeve & gear tray, Manufacturer Thorn Lighting Ltd - Tel: 02920 452233 Or equal and approved Reference. - Thorn Chartor – SAP Code 96011222 Lamp: - 50 watt Sodium HSE Ref: BB (Step Lighting) Description Recessed rectangular wall light with 26 watt TC-D compact fluorescent lamp, die cast aluminium body with 45o optical grille, finished black, sealed to IP65. Light to be inset into centre of riser on alternate steps. Manufacturer Thorn Lighting Ltd - Tel: 02920 452233 Or equal and approved Reference. - Thorn Jalon H – SAP Code 96002659 Lamp: - 1 x 26W TC-D Compact Fluorescent. QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 18 ----------------------------------------------------------------------------------------------------------------QP120 SCHEDULE OF LUMINAIRES - (Cont’d) Ref: CC (Pathway Lighting) Description Ground mounted recessed LED floodlight with die cast aluminium body, with aluminium housing complete with single 180o window domed cover. Note: Emergency battery back-up to selected fittings on fire escape pathways, and principle exit routes provided via static inverter with 500 V/A rating, located in switchroom adjacent to external lighting board. Manufacturer Bega Lighting Limited Or equal and approved Reference - Bega – Ground Recessed LED –Code Ref 8673 Lamp: - 3.0 Watt LED Ref DD (Courtyard Lighting) Description Ground mounted recessed LED floodlight with die cast aluminium body, with aluminium housing complete with twin 60o windows within domed cover. Note: Emergency battery back-up to selected fittings on principle exit route provided via static inverter with 500 V/A rating, located in switchroom adjacent to external lighting board. Manufacturer Bega Lighting Limited Or equal and approved Reference - Bega – Ground Recessed LED –Code Ref 8674 Lamp: - 3.0 Watt LED QED Engineers Ltd DESCRIPTION OF ENGINEERING SERVICES CRANWELL HOUSE REDEVELOPMENT, BATH Page No 19 ----------------------------------------------------------------------------------------------------------------QP120 SCHEDULE OF LUMINAIRES - (Cont’d) Ref: FF (Entrance Floodlighting – Existing building) Description Surface mounted area floodlight with integral control gear, and street optics, fixed on building exterior, to illuminate steps & carpark (To replace existing area floodight). Manufacturer Thorn Lighting Limited - Tel: 01222 452233 Or equal and approved Reference - Thorn –Areaflood – SAP Code 96255838 Lamp: - 150 Watt HST – High Pressure Sodium