Registered Office: WITT House, Brookwoods Industrial Estate, Burrwood Way, Holywell Green, Halifax HX4 9BH ENGLAND Company Registration Number: 400 66 40 PSB - UK Ltd. Witt House, Brookwoods Industrial Estate, Burrwood Way, Holywell Green, Halifax HX4 9BH ENGLAND Tel: +44 (0) 1422 378131 Fax: +44 (0) 1422 377321 Email: [email protected]Internet: www.psbuk.comMember of the WITT UK Group Our Ref: PSBUK1122/11Scott Wilson 6-8 Greencoat Place London SW1P 1PL 14 th March 2011 For the attention of Mr Tim Sharratt Re: Goodmans Field Car Park & Loading Bay Ventilation System Thank you for inviting us to submit our proposals for the ventilation of the above car park and loading bay. We are pleased to attach our proposals based on the use of an impulse system in the car park and loading bay. The attached system overview provides an outline of our proposed scheme and allows for design, supply, commissioni ng and system demonstration. We have also offered the option of electrical and mechanical installation and for the incorporation of fire detection and CO monitoring. If you have any questions in connection with the attached proposals, please do not hesitate to contact the undersigned. We hope we will have the opportunity to talk to you soon. Yours faithfully For and on behalf of PSB-UK Ltd R InghamRichard Ingham Internal Sales Manager Mob: 07968 754 106 E-mail [email protected]Your PSB-UK contact on this project is: Name:Steve Collins Mob: 07850 758 545
Re: Goodmans FieldCar Park & Loading Bay Ventilation System
Thank you for inviting us to submit our proposals for the ventilation of the above car park and loading bay.We are pleased to attach our proposals based on the use of an impulse system in the car park andloading bay.
The attached system overview provides an outline of our proposed scheme and allows for design, supply,commissioning and system demonstration. We have also offered the option of electrical and mechanicalinstallation and for the incorporation of fire detection and CO monitoring.
If you have any questions in connection with the attached proposals, please do not hesitate to contact theundersigned. We hope we will have the opportunity to talk to you soon.
Yours faithfullyFor and on behalf of PSB-UK Ltd
R Ingham Richard InghamInternal Sales ManagerMob: 07968 754 106E-mail [email protected]
Your PSB-UK contact on this project is:Name: Steve Collins
The car park & loading bay is on a single level with a single entry/exit ramp. The ramp along with fresh airinlet vent shown on the drawing will provide the fresh air inlet
Basis of System Design
A fully mechanical ventilation system compliant with Approved Documents B & F of the current BuildingRegulations and designed in accordance with British Standard BS7346: Part 7: 2006 is to be installed.The system is to be designed to provide smoke control in accordance with BS7346: Part 7: 2006 Clause11 in the event of fire.
The following drawing has been used in the preparation of the system design:
LDS Architects Drawing No: SK016
Car Park & Loading Bay Statistics
LevelAream2
Slab to Soffitm
Volumem3
Car Park & Loading Bay 10,064 4.5 45,288
Airflow Rates
The airflow rate is to be in accordance with current building regulations in force in England & Wales, i.e.,Building Regulations, Approved Documents B & F.
CO Control : Design flow for low level CO : 37.74m3 /sDesign flow for high level CO : 75.48m3 /s
Fire Condition : Design flow for Smoke : 125.80m3 /s
Fresh air will be drawn into the car park and loading bay as described above. Contaminated air will beextracted via four main extract fans mounted in parallel. The fans will be located in the plant room shownon the drawings (top left hand corner of the car park).
CO monitoring will be adopted to reduce energy consumption and to reduce the running costs for day today ventilation by varying the rate of ventilation according to the level of traffic movement.
Daily Ventilation Under “normal” ventilation conditions, air will be drawn through all parts of the car park and loading bay at arate equivalent to approximately 3 air changes per hour and selected impulse fans will operate at low speed.
CO pollution levels will be continually monitored. On detection of CO levels rising beyond 20ppm, additional
impulse fans will operate at low speed to mix and dilute the CO gases for extract via the main fans. Shouldthe CO level continue to rise to 30ppm, the air change rate will increase to 6 per hour.
The main extract fans will vary in speed according the exhaust pollution levels within the car park andloading bay, thereby providing the 3 to 6 air changes per hour.
Fire Condition A fully addressable fire detection system that would be installed using multi-criteria fire detector heads whichwould monitor both smoke and temperature.
On detection of fire, the main fans will operate at full speed increasing the airflow to at least 10 air changesper hour. Selected impulse fans will activate at high speed dependent on location of the fire.
Control System Control of the ventilation system will be via a master control panel located within a compartment separatedfrom the main body of the car park and loading bay. The control panel will incorporate all necessary starters,overloads and control functions necessary to ensure that the ventilation system responds appropriately tothe conditions within the car park and loading bay.
Control of the system will achieved using a programmable logic control system on to which the detailedcause and effect for the ventilation system will be mapped. All functions in relation to daily ventilation and firemodes will be controlled from this panel. A separate wall mounted CO Detection and Smoke Detectionpanels will be installed adjacent to the master control panel.
The panel will contain:• Idec PLC• single socket service outlet protected by a 10A MCB
• Fire override (Run to destruct) where inverters are used.
• Any system fault will be indicated on front of panel and by a 22mm sounder/beacon, which will alsoindicate any service requirement.
A fireman’s override switch will be installed to enable the attending fire service personnel to switch thesystem off if required. The fireman’s switch will be wired back to the main control panel.
The following table provides a summary of the system function under various environmental and fireconditions within the car park and loading bay.
Condition System Function Airflow RateAir Changes Per Hour
CO < 20ppmMain extract fans at low speed plusselected impulse fans at low speed 3
CO > 20ppmMain extract fans at low speed plusselected impulse fans at low speed 3
CO > 30ppmMain extract fans at mid speed plusselected impulse fans at low speed 6
Fire
Main extract fans at full speed plus
selected impulse fans at full speed. 10
Equipment Rating
All main extract fans are rated to withstand a temperature of 3000C for a period of at least 60 minutes andthe impulse fans 3000C for 120 minutes. All fans are tested in accordance with BS EN 12101-3 to verifycompliance with the time/temperature criteria stated.
The main fans have been selected on a nominal pressure drop, which will need to be confirmed at detaildesign stage.
Attenuation
We have received no information on sound criteria relevant to this project and, therefore, no attenuation hasbeen allowed for in our proposals.
A FansMain Extract Fans 04 piecesImpulse Fans 21 pieces
B Main Control PanelForm 1 main control panel with PLC logic and Fireman’s switchIncluding all the required controls for the system 01 pieces
C InstallationInstallation of fans & detectors
D CO monitoring systemDetectors, including all necessary fixing materials 22 pieces
E Fire detection systemMulti-criteria smoke detectors 100 pieces
F Detailed System DesignThe engineering design work will consist of the following
◊ Technical submission
◊ Impulse fan layout
◊ Main fan installation & builders work detail◊ Cause & Effect chart
◊ CO sensor layout◊ Smoke detection layout
◊ Control schematic & cabling selection
◊ Design of control system software
G CarriageDelivery – London
H CommissioningCommissioning will be undertaken in accordance with BS7346: Part 7: 2006 Clause 17 and willinclude:
Commissioning fan system Commissioning electrical panels Commissioning of the CO & Smoke detection systems (where applicable) Commissioning complete system
Approvals test employing cold smoke generation to demonstrate the performance of the systemwitnessed by the appropriate regulatory authorities, specifiers and client representatives andcompleted to their satisfaction.
J CablingThe following table provides information on the specification of cable used for theImpulse Ventilation System.
Item Cable Specification
Power cable to main fans Prysmian FP400 or equivalentPower cable to impulse fans Prysmian FP400 or equivalent
Signal cable to smoke detectors Prysmian FP200 or equivalentSignal cable to CO detectors PVC Screened
Please note that we have not included for enhanced cables as referred to inBS7346: Part 6: 2005 as we consider these excess to requirements.
The maximum cable length allowed for from the main control panel to the main extractfans is 20m
K Electrical SupplyThese proposals are based on the assumption that a power supply, meeting the requirements ofcurrent national and local Building Regulations, and terminating within the PSB main control panel.
Automatic change over is also included within PSB main control panel.
The following items are specifically excluded from our scope of supply in this tender:
Value Added Tax. Fire stopping. Ductwork/Plenum Attenuation Builders work, including holes for cabling, containment and sealing Where special soffit finishes are employed the fixing of fans and detectors may have
to be reconsidered and may involve additional cost. Offloading of main fans to plant room. Containment Maintenance programme Non-standard health & safety procedures Any item not specifically referred to in this tender as being included. Exhaust/Inlet Louvres Extract Fan and Ancillaries Support Steelwork Autochangeover Panel CFD Modelling Crane Hire
General Terms & ConditionsFinal terms and conditions are to be agreed. These proposals are based on standard PSB-UK Ltd Terms and Conditionsof sale (available on request, and on our web site).
The sum of 20% of the contract value will be charged on completion of detailed design work as detailed under equipmentoverview above.Payment of all approved applications will be due within a maximum period of 28 days, overdue payments will be subjectto interest charges equivalent to 5% above the bank rate ruling at the time of invoice.System warranty will be 12 months from practical completion or 15 months from installation, whichever is the sooner,and from first handover in phased installations.ValidityThis quotation is valid for acceptance up to 30 days from the date of this tender, unless withdrawn in writing and is nottransferable to a third party.This quotation is valid for completion of supply and installation work within 6 months of order placement.DeliveryEngineering and drawings, including the calculations of the electrical wiring will be available within 4 weeks of your firmorder enabling us to proceed.The supply, installation and commissioning of the equipment and system will be determined in conjunction withyourselves or other interested party to fit, wherever possible, into the build programme.DrawingsIt is a condition of this tender that full details of the building, in so far as that which affects the work undertaken by PSB-UK Ltd, are provided in AutoCAD Electronic format.No information contained within this tender should be used for construction purposes. PSB-UK Ltd will provideconstruction issue drawings on receipt of an order. To save time, the detailed design/drawing work can proceed on thereceipt of a letter of intent, but the drawings will only be released once an official order is received.Validation of the SystemCold smoke generation will be used at the time of commissioning to prove the air and smoke paths within the car park.Property RightsThe contents of this tender are exclusive to and remain the property of PSB-UK Ltd and must not be copied ordivulged to any other party without the express permission of PSB-UK Ltd.Tender Proposals
Please note that information contained in these proposals, such as fan and sensor quantities, are subject to confirmationat detail design stage and cannot be used for construction purposes.Electrical Power SupplyIt is assumed that a 110V electrical power supply will be provided free of charge for installation and commissioning work.It is also assumed that an essential power supply of adequate capacity will be provided to the PSB control panel.Working HoursThe tender is based on two attendances on site for installation. Only normal working hours are allowed for in this tender,these hours being Monday to Friday, 8.00am to 4.30pm. Working outside these hours can be arranged at extra cost ifrequired.Removal of RubbishAllowance is made for ensuring that all rubbish created by PSB will be deposited into skips. However, it is assumed thatsuitable skips and removal of the rubbish will be provided free of charge.Containment & Cabling Clarification
Please note that the cabling included within these proposals specifically excludes containment unless stated otherwise.Where containment is included, or is provided by others, it is based upon all fan cables being laid within cable trays.Should cables trays be inverted additional costs will be incurred due to the additional labour required, and we reserve theright to adjust our price accordingly.Similarly our quotation includes for the running of cables via the most practical and shortest routes. Should the installedcable trays take diverse routes to the locations of the respective equipment then additional costs will be incurred due tothe additional parts and labour required, and we reserve the right to adjust our price accordingly. Please note that we doNOT include for “clipping” cables directly to the soffit or walls.
