Bankhead Depot Phase 2 Office Accomodation
12 July 2011
Table of Contents
Title
Page
P
Building fabric sundries
4
P31
Holes, chases, covers and supports for services
6
P32
Services painting systems
8
S
Piped supply systems
11
S10
Hot and cold water supply systems
13
S32
Natural gas supply systems
19
T
Mechanical heating, cooling and refrigeration
22
T10
Heating systems
24
T20
Gas and oil fired boilers
27
T30
Heat emitters
29
T41
Variable refrigerant flow systems
31
T50
Chilled water systems
34
T60
Central refrigeration plant
36
U
Ventilation and air conditioning systems
38
U10
Ventilation systems
40
U30
Air conditioning systems
43
U41
Fan coil units
46
U60
Local air conditioning systems
48
U80
Air ductwork and ancillaries
52
U81
Air handling units
57
U82
Fans
60
U87
Silencers and acoustic treatment
62
U88
Air terminal devices
64
Y
General engineering services
67
Y10
Pipelines
69
Y11
Pipeline ancillaries
76
Y12
Mechanical cleaning and chemical treatment
85
Y20
Pumps
87
Y24
Trace heating tapes
90
Y30
Mechanical thermal insulation
92
Y32
Mechanical plant and equipment identification
98
Y35
Flues and chimneys
101
Y40
Mechanical engineering services control and management
103
systems
Y50
Mechanical commissioning
123
P
Building fabric sundries
P31
Holes, chases, covers and supports for services
P31 Holes, chases, covers and supports for services
To be read with Preliminaries/General conditions
PRODUCTS
EXECUTION
610
COORDINATION Locations and dimensions of holes and chases for services: Submit
details to Contract Administrator.
650
HOLES, RECESSES AND CHASES IN MASONRY
•
Locations: To maintain integrity of strength, stability and sound resistance of construction.
•
Sizes: Minimum needed to accommodate services.
- Holes (maximum): 300 x 300 mm.
•
Walls of hollow or cellular blocks: Do not chase.
•
Walls of other materials:
- Vertical chases: No deeper than one third of single leaf thickness, excluding finishes.
- Horizontal or raking chases: No longer than 1 m. No deeper than one sixth of the single
leaf thickness, excluding finishes.
•
Chases and recesses: Do not set back to back. Offset by a clear distance at least equal to
the wall thickness.
•
Cutting: Do not cut until mortar is fully set. Cut carefully and neatly. Avoid spalling, cracking
and other damage to surrounding structure.
670
NOTCHES AND HOLES IN STRUCTURAL TIMBER
•
General: Avoid if possible.
•
Sizes: Minimum needed to accommodate services.
•
Position: Do not locate near knots or other defects.
•
Notches and holes in same joist: Minimum 100 mm apart horizontally.
•
Notches in joists: Locate at top. Form by sawing down to a drilled hole.
- Depth (maximum): 0.125 x joist depth.
- Distance from supports: Between 0.07 and 0.25 x span.
•
Holes in joists: Locate on neutral axis.
- Diameter (maximum): 0.25 x joist depth.
- Centres (minimum): 3 x diameter of largest hole.
- Distance from supports: Between 0.25 and 0.4 of span.
•
Notches in roof rafters, struts and truss members: Not permitted.
•
Holes in struts and columns: Locate on neutral axis.
- Diameter (maximum): 0.25 x minimum width of member.
- Centres (minimum): 3 x diameter of largest hole.
- Distance from ends: Between 0.25 and 0.4 of span.
690
INSTALLING PIPE SLEEVES
•
Sleeves: Fit to pipes passing through building fabric.
•
Material: Match pipeline.
•
Size: One or two sizes larger than pipe to allow clearance.
•
Finish: Install sleeves flush with building finish. In areas where floors are washed down,
install protruding 100 mm above floor finish.
•
Masking plates: Fit at visible penetrations, including through false ceilings of occupied
rooms.
P32
Services painting systems
P32 Services painting systems
To be read with Preliminaries/General conditions
130
METAL SURFACE COATING To all unprotected metal service supports and pipework
susceptible to corrosion
•
Surface: Steel.
•
Initial coats: Contractor's choice.
- Number of coats: 1
- Colour: To be selected from manufacturers' standard range .
•
Finishing coats: Contractor's choice.
- Number of coats: 1
- Colour: To be selected from manufacturers' standard range .
- Finish: Not applicable.
SYSTEM PERFORMANCE
210
DESIGN
•
General: Complete the design of the coating systems in accordance with BS 6150.
•
Proposals: Submit schedules, drawings and manufacturer's literature.
220
DESIGN LIFE OF METAL SURFACE COATINGS
•
Design life (assuming reasonable wear and tear, and regular maintenance): 7 years
•
Environment category in accordance with BS 6150: Interior mild.
- Chemical and liquid resistance: Not applicable.
EXECUTION
610
PREPARATION GENERALLY
•
Standard: In accordance with BS 6150.
•
Substrates: Sufficiently dry and sound in depth to suit coating.
•
Efflorescence: Remove.
•
Dirt, grease and oil: Remove.
- Give notice if surfaces and/ or substrates have been contaminated.
•
Joints, cracks, holes and other depressions:
- Fill with stoppers and/ or fillers. Work well in and finish off flush with surface.
- Provide smooth finish.
•
Water based stoppers and fillers:
- Apply before priming unless recommended otherwise by manufacturer.
- If applied after priming: Patch prime.
•
Oil based stoppers and fillers: Apply after priming.
•
Surface irregularities: Finish smooth.
•
Dust, particles and residues from abrasion: Remove.
•
'Wet paint' signs and barriers: Locate where necessary.
635
SERVICE EQUIPMENT, FIXTURES AND FITTINGS
•
Preparation:
- Items to be removed: Grilles, coverplates and other surface mounted fixtures. and Plant
labels and/ or signage.
- Surfaces to be cleaned: None.
- Surfaces not to be coated: Radiator valves and stop valves and Hinges .
645
PREPARING PREVIOUSLY COATED SURFACES
•
Standard: In accordance with BS 6150, clause 11.5 and tables 19 and 20.
•
Removing coatings: Do not damage substrate and adjacent surfaces or adversely affect
subsequent coatings.
•
Existing coatings on ironmongery:
- Remove old coating marks. Clean and polish.
- Do not remove hinges.
- Refix ironmongery on completion.
•
Loose, flaking or otherwise defective areas: Carefully remove to leave a firm surface.
•
Alkali affected coatings: Completely remove.
•
Problematic substrates: Give notice of the following:
- Coatings suspected of containing lead.
- Substrates suspected of containing asbestos.
- Significant rot, corrosion or other degraded substrates.
•
Retained coatings: Remove dirt, grease and contaminants.
•
Gloss coated surfaces: Form a key for subsequent coat.
•
Partly removed coatings:
- Additional preparatory coats: Apply to restore original film thicknesses.
- Junctions: Make surfaces flush.
•
Completely stripped surfaces: Prepare as for uncoated surfaces.
655
PREPARING PREVIOUSLY COATED STEEL
•
Existing defective coatings including primers: Remove to leave a firm edge and clean
bright metal.
•
Sound coatings: Form a key for subsequent coat.
•
Corrosion and loose scale: Remove to leave bare metal.
•
Residual rust: Remove.
•
Remaining areas: Degrease.
•
Bare areas: Re-prime as soon as possible.
665
PREPARING UNCOATED STEEL - MANUAL CLEANING
•
Oil and grease: Remove.
•
Corrosion, loose scale, welding slag and spatter: Remove.
•
Residual rust: Treat using a proprietary removal solution.
•
Primer: Apply as soon as possible.
680
PREPARING UNCOATED ALUMINIUM OR COPPER OR LEAD
•
Surface corrosion: Remove and provide suitable surface for coating.
760
APPLYING COATINGS GENERALLY
•
Conditions: Maintain suitable temperature, humidity and air quality during application and
drying.
•
Surfaces: Clean and dry at time of application.
•
Thinning and intermixing of coatings: Not permitted unless recommended by manufacturer.
•
Overpainting: Do not paint over intumescent strips or silicone mastics.
•
Priming coats:
- Thickness: To suit surface porosity.
- Application: As soon as possible on same day as preparation is completed.
•
Finish:
- Even, smooth and of uniform colour.
- Free from brush marks, sags, runs and other defects.
- Cut in neatly.
770
COATING CONCEALED METAL SURFACES
•
General: Apply additional coatings to surfaces that will be concealed when fixed in place.
S
Piped supply systems
S10
Hot and cold water supply systems
S10 Hot and cold water supply systems
To be read with Preliminaries/ General conditions
GENERAL
110
INCOMING WATER SUPPLY
•
Water company: as existing.
•
Volume flow rate: as existing
•
Position of incoming mains water supply: to tank room in Phase 3
130
PUMPED COLD WATER SUPPLY SYSTEM To Phase 2
•
Type: Flooded suction or suction lift to directly pressurize hot and cold water systems .
•
Water meters: Required.
•
Pressure booster sets: As section Y20.
•
Pumps: as schedule.
•
Storage tank or cistern: as schedule.
- Accessories: as schedule.
•
Water treatment: Not required.
•
Pipelines:
- Below ground: As section Y10.
- Above ground: As section Y10.
•
Pipeline ancillaries: As section Y11.
•
Thermal insulation:
- Pipelines: As section Y30.
- Tanks: As section Y30.
•
Vibration isolation: Submit design and cost proposals.
•
Sanitary appliances: As contract drawings 00/01M(53)001/2 .
•
Drinking water outlets: all basins/sinks.
•
Flush control devices: Required.
•
Water coolers: Not required.
•
Controls: As section Y40.
•
Accessories: Trace heating, as section Y24.
•
Completion:
- Cleaning and chemical treatment: Flushing, as section Y12 .
- Plant and equipment identification: As section Y32.
- Commissioning: Commissioning of cold water supply systems, as section Y50 .
140
INSTANTANEOUS HOT WATER SUPPLY SYSTEM ACV boilers as existing
•
Instantaneous water heater: Gas fired .
•
Pumps: as schedule.
•
Pipelines: As section Y10.
•
Pipeline ancillaries: As section Y11.
•
Thermal insulation:
- Pipelines: As section Y30.
•
Sanitary appliances: as schedule.
•
Controls: As section Y40.
•
Completion:
- Cleaning and chemical treatment: Flushing, as section Y12 .
- Plant and equipment identification: As section Y32.
- Commissioning: Commissioning of hot water supply systems, as section Y50 .
SYSTEM PERFORMANCE
210
DESIGN AND DETAILING
•
Design: Complete the design and detailing of the hot and cold water supply.
•
Standard: To BS 6700 or BS EN 806-2 and in accordance with HSE publication 'The
control of legionella bacteria in water systems. Approved code of practice and guidance'.
•
Proposals: Submit drawings, technical information, calculations and manufacturer's
literature.
220
COLD WATER SUPPLY
•
Incoming mains water supply:
- Site factors: as existing.
•
Type of system: Pumped from a break cistern or storage provision.
•
Design parameters: In accordance with CIPHE Plumbing engineering services design
guide.
•
Daily consumption: 20,000l/day.
•
Storage capacity: as schedule.
230
INSTANTANEOUS HOT WATER SUPPLY
•
Type: Gas fired.
•
Water supply: Boosted.
240
CENTRALIZED HOT WATER STORAGE SYSTEM
•
System design: Design the system to meet the following requirements:
•
Storage capacity: as exisitng.
- Type of building: Office and With canteen.
- Number of people: approx 330.
•
Primary heat source: Capable of raising temperature of water from 10°C to 60°C within one
hour.
•
Temperature range of stored hot water: 80-90°C.
•
Water supply: Boosted.
250
PIPELINE SIZES
•
Sizing: Calculate sizes to meet simultaneous demand for the building in accordance with
BS 6700 Appendix D or BS EN 806-3. Submit proposals.
•
Performance:
- Water velocity (maximum): 1.3 m/s for hot water and 2.0 m/s for cold water.
- Filling time (maximum) for cold water storage cistern: Submit proposals.
255
DRAW OFF REQUIREMENTS
•
Baths (G¾):
- Type of supply: n/a.
- Discharge rate (design): 0.3 L/s.
•
Baths (G1):
- Type of supply: n/a.
- Discharge rate (design): 0.6 L/s.
•
Bidets:
- Type of supply: n/a.
- Discharge rate (design): 0.2 L/s.
•
Dish-washing machines:
- Type of supply: Boosted cold.
- Discharge rate (design): 0.15 L/s.
•
Handbasins (pillar or mixer taps):
- Type of supply: Hot and cold.
- Discharge rate (design): 0.1 L/s.
•
Handbasin (spray or spray mixer taps):
- Type of supply: Hot and cold.
- Discharge rate (minimum): 0.05 L/s.
•
Kitchen sinks (G½):
- Type of supply: Hot and cold.
- Discharge rate (design): 0.2 L/s.
•
Kitchen sinks (G¾):
- Type of supply: n/a.
- Discharge rate (design): 0.3 L/s.
•
Kitchen sinks (G1):
- Type of supply: n/a.
- Discharge rate (design): 0.6 L/s.
•
Shower heads:
- Type of supply: Hot and cold.
- Discharge rate (minimum): 0.2 L/s.
•
Urinal cisterns (each position served):
- Type of supply: Cold from cistern.
- Discharge rate (design): 0.004 L/s.
•
Urinal flushing valve:
- Type of supply: Boosted cold.
- Discharge rate (design): 0.3 L/s.
•
Washbasins (pillar or mixer taps):
- Type of supply: n/a.
- Discharge rate (design): 0.15 L/s.
•
Washing machines:
- Type of supply: Boosted cold.
- Discharge rate (design): 0.2 L/s.
•
WC cisterns (to fill in 2 minutes):
- Type of supply: Boosted cold.
- Discharge rate (design): 0.13 L/s.
•
WC flushing troughs:
- Type of supply: n/a.
- Discharge rate (design): 0.15 L/s.
•
WC pressure flushing valves:
- Type of supply: Boosted cold.
- Discharge rate (design): 1.5 L/s.
260
COMBUSTION AIR SUPPLY TO GAS APPLIANCES
•
Size: Submit proposals.
•
Location: Submit proposals.
PRODUCTS
310
DEZINCIFICATION
•
Fittings, pipelines and equipment located below ground or in concealed or inaccessible
locations: Resistant to dezincification, e.g. gunmetal.
320
WATER METERS in tank room
•
Standard: To BS EN 14154-1.
•
Type: In-line meters.
•
Manufacturer: Contractor's choice .
- Product reference: Contractor's choice.
•
Size: Submit proposals.
•
Pressure class: Submit proposals.
•
Temperature class: Submit proposals.
•
Metrological class: B.
•
Connections: Submit proposals.
•
Indicating device: Type 2 - digital.
•
Features: Pulsed output for remote monitoring.
•
Accessories: To BS EN 14154-2.
360
INSTANTANEOUS WATER HEATERS, ELECTRIC Staff kitchens
•
Standard: To BS EN 60335-2-35, BEAB approved.
•
Manufacturer: as schedule.
- Product reference: as schedule.
•
Type: Single point - mains supply.
•
Rating: as schedule.
•
Flow rate: as schedule.
•
Control: as schedule.
•
Outlets: as schedule.
•
Casing finish: as schedule.
•
Accessories: as schedule.
480
FLUSH CONTROL DEVICES urinals
•
Manufacturer: as schedule.
- Product reference: as schedule.
•
Flush rate: Programmable with option for 1-4 flushes/ hour and 12 or 24 hours selectable .
•
Water supply valve: as schedule.
•
Sensor unit:
- Material: as schedule.
•
Movement detector: as schedule.
•
Power supply: as schedule.
EXECUTION
620
INSTALLATION GENERALLY
•
Installation: To BS 6700.
•
Performance: Free from leaks and the audible effects of expansion, vibration and water
hammer.
•
Fixing of equipment, components and accessories: Fix securely, parallel or perpendicular
to the structure of the building.
•
Preparation: Immediately before installing tanks and cisterns on a floor or platform, clear
the surface completely of debris and projections.
•
Corrosion resistance: In locations where moisture is present or may occur, avoid contact
between dissimilar metals by use of suitable washers, gaskets, and the like.
630
INSTALLING WATER METERS
•
Standards: To BS EN 14154-2.
•
Interconnection to Building Management and Monitoring System (BMMS): Required.
650
INSTALLING GAS FIRED WATER HEATERS
•
Installation: In accordance with BS 5546.
680
BALANCED FLUE TERMINAL
•
Opening in external wall: Submit proposals.
•
Flue guard: Submit proposals.
COMPLETION
910
HYDRAULIC PRESSURE TESTING OF HOT AND COLD WATER SUPPLY SYSTEMS
•
Standard: To BS 6700.
•
Notice (minimum): 24 h.
•
Pressure: 1.5 times working pressure.
•
Duration of test: 1 h.
980
DOCUMENTATION
•
Manufacturers' operating and maintenance instructions: Submit for equipment and
controls.
•
System operating and maintenance instructions: Submit for the system as a whole giving
optimum settings for controls.
•
Record drawings: Submit drawings showing the location of circuits and operating controls.
990
OPERATING TOOLS
•
Tools: Supply tools for operation, maintenance and cleaning purposes.
•
Keys: Supply keys for valves and vents.
995
MAINTENANCE
•
Servicing and maintenance: Undertake.
- Duration: Until 12 months after Practical Completion.
S32
Natural gas supply systems
S32 Natural gas supply systems
To be read with Preliminaries/ General conditions
GENERAL
110
INCOMING GAS SUPPLY
•
Gas transporter: as existing.
•
Gas supplier: as existing.
•
Volume flow rate: as existing.
•
Position of meter: as existing.
120
NATURAL GAS SUPPLY SYSTEM to plantroom and kitchen
•
Metering: Secondary gas meter.
•
Gas pipelines: Low pressure supply.
•
Gas valves: Submit design and cost proposals.
•
Gas equipment: Safety and control devices .
•
Gas outlets: Submit design and cost proposals .
•
Completion:
- Plant and equipment identification: As section Y32
SYSTEM PERFORMANCE
210
DESIGN
•
Design: Complete the design of the gas supply system.
•
Proposals: Submit drawings, technical information, calculations and manufacturers'
literature.
220
PIPELINE SIZES
•
Sizing: Calculate sizes of gas pipes for the equipment proposed.
•
Equipment gas consumption: In accordance with CIPHE Design Guide .
PRODUCTS
310
SECONDARY GAS METERS as indicated on contract drawings
•
Standard:
- Gas meters: To BS EN 1359.
- Unions and adaptors: To BS 746.
- Low pressure meters: In accordance with IGE/GM/6.
- Electrical connections: In accordance with IGE/GM/7.
•
Manufacturer: as specified.
- Product reference: Submit proposals.
•
Accessories: Pulsed output for BMS monitoring.
•
Housing type: Submit proposals.
330
LOW PRESSURE GAS SUPPLY PIPELINES generally
•
Standards: To BS EN 1775 and in accordance with IGE/UP/2.
•
Materials: Contractor's choice.
•
Jointing method: Contractor's choice.
340
GAS SOLENOID VALVES Provisional sum to allow for new valve if required
•
Manufacturer: Contractor's choice
- Product reference: Contractor's choice
•
Type: Contractor's choice.
•
Mounting: Contractor's choice
•
Speed of opening: Contractor's choice.
•
Connections: Manufacturer's standard.
•
Pressure rating to BS EN 1333: Contractor's choice.
•
Solenoid supply voltage: Contractor's choice.
•
Actuation method: Contractor's choice
•
Reset: Contractor's choice.
•
Accessories: Contractor's choice.
350
MECHANICAL SAFETY VALVES as required
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Type: Contractor's choice
•
Accessories: Contractor's choice.
400
SAFETY AND CONTROL DEVICES
•
Standard: To BS EN 13611.
410
BALL VALVES, MANUALLY OPERATED generally.
•
Standard: To BS EN 331.
•
Type: Lever operated.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Submit proposals.
•
Connections: Contractor's choice.
EXECUTION
620
INSTALLATION GENERALLY
•
Installation: In accordance with IGE/UP/10.
625
GAS SAFE REGISTRATION REQUIREMENTS
•
Type of service: All services.
•
Type of gas: Natural gas.
•
Area of work:
- Catering;
- Cooker; and
- Gas boilers.
630
INSTALLING GAS METERS
•
Secondary gas meters:
- Low pressure:In accordance with BS 6400-1.
- Medium pressure: In accordance with BS 6400-2.
- Non-domestic: In accordance with IGE/GM/8.
650
INSTALLING GAS PIPELINES
•
Installation: In accordance with BS EN 1775.
COMPLETION
920
SMALL LOW PRESSURE COMMERCIAL AND INDUSTRIAL GAS INSTALLATIONS
•
Soundness testing and purging: In accordance with IGE/UP/1A.
925
SMALL NATURAL GAS INSTALLATIONS
•
Tightness testing and direct purging: In accordance with IGE/UP/1B.
930
COMMERCIAL AND INDUSTRIAL GAS INSTALLATIONS
•
Soundness testing and purging: In accordance with IGE/UP/1.
•
Testing, purging and commissioning pipelines: In accordance with BS EN 1775 and BS EN
15001-2.
•
Commissioning gas fired plant: In accordance with IGE/UP/4
940
PRESSURE TESTING OF NATURAL GAS SUPPLY SYSTEMS
•
Notice (minimum): 24 h.
•
Pressure: 1.5 times working pressure.
•
Duration of test: 1 h.
960
DOCUMENTATION
•
Manufacturers' operating and maintenance instructions: Submit for equipment and
controls.
•
System operating and maintenance instructions: Submit for the systems as a whole giving
optimum settings for controls.
•
Record drawings: Submit drawings showing the location of circuits and operating controls.
970
OPERATING TOOLS
•
Tools: Supply tools for operation, maintenance and cleaning purposes.
•
Valve keys: Supply keys for valves and meter housing.
- Quantity: 1 of each type.
980
MAINTENANCE
•
Servicing and maintenance: Undertake.
- Duration: Until 12 months after Practical Completion.
T
Mechanical heating, cooling and refrigeration
T10
Heating systems
T10 Heating systems
To be read with Preliminaries/ General conditions.
GENERAL
110
LOW TEMPERATURE HOT WATER HEATING SYSTEM Within Phase 2 Office block
•
Type: Two pipe.
•
Heat source: Gas fired boiler, as section T20.
- Flues and chimneys: Use existing.
•
Pressurization units: Not required.
•
Feed and expansion tanks: Not required.
•
Pumps: as existing.
•
Pipelines: materials to match existing.
•
Pipelines ancillaries: As section Y11.
•
Thermal insulation: As section Y30.
•
Vibration isolation: Flexible hoses, as section Y31 and Isolation hangers, as section Y31 .
•
Heat emitters:
- Air curtains, as section T30;
- Air handling units, as section U81;
- Fan coil units, as section U41; and
- Heating coils, as section U84 .
•
Controls: As section Y40.
•
Accessories: Trace heating, as section Y24.
•
Completion:
- Cleaning and chemical treatment: Flushing and chemical treatment, as section Y12 .
- Plant and equipment identification: Mechanical plant and equipment identification, as
section Y32.
- Commissioning: Commissioning of heating systems, as section Y50 and Performance
testing, as section Y50.
SYSTEM PERFORMANCE
220
BASIC DESIGN TEMPERATURES
•
Design temperatures: 21°C.
•
External air temperature: -4°C.
250
SYSTEM OPERATING PARAMETERS
•
Design flow temperature: Maximum 82°C.
•
Temperature difference across primary heating circuit: 11°C.
•
Temperature difference across primary hot water circuit: Maximum 11°C.
•
Water velocity: Maximum 1.5 m/s.
EXECUTION
610
STRIPPING OUT
•
Extent of stripping out: As detailed in the contract drawings.
620
INSTALLING WATER BASED HEATING SYSTEMS
•
Standard: To BS EN 14336.
COMPLETION
905
HYDRAULIC PRESSURE TESTING OF LOW TEMPERATURE HOT WATER HEATING
SYSTEMS
•
Testing: In accordance with BS EN 14336, Appendix B .
•
Notice (minimum): 24 h
•
Pressure: 2 times working pressure.
•
Duration of test: 1 h..
910
DOCUMENTATION
•
Operation and maintenance instructions: Submit.
•
Record drawings: Submit.
920
OPERATING TOOLS
•
Tools: Supply tools for operation, maintenance and cleaning purposes.
•
Keys: Supply keys for valves and vents.
930
MAINTENANCE
•
Servicing and maintenance: Undertake.
- Duration: Until 12 months after Practical Completion.
T20
Gas and oil fired boilers
T20 Gas and oil fired boilers
PRODUCTS
310
GAS FIRED BOILERS As existing DHW boiler, the boiler plant requires to be connected
and commission
•
Standard: as existing.
•
Manufacturer: as existing.
- Product reference: as existing.
•
Output (kW): as existing.
•
Seasonal efficiency (gross calorific value (minimum)): as existing.
•
Thermal performance testing: To BS 845-1.
•
NOx emissions (maximum): as existing.
•
Safety: To BS 5978.
•
Electrical safety and performance: To BS 5986.
•
Number of modules: as existing.
•
Operating pressure: as existing.
•
Test pressure: as existing.
•
Operating temperature: as existing.
•
Heat exchanger: as existing.
•
Fuel: as existing.
•
Burner: as existing.
•
Burner control: as existing.
•
Electrical supply type: as existing.
•
Casing material: as existing.
•
Mounting: as existing.
•
Integral controls: as existing.
•
Accessories: as existing.
400
AIR SUPPLY TO APPLIANCES
•
Standards: To BS 5440-2 and BS 6644.
•
Sizes Submit proposals.
•
Location: Submit proposals.
EXECUTION
610
INSTALLING BOILERS
•
Standards:
- Gas fired boilers: To BS 6798 and BS 6644.
- Oil fired boilers: In accordance with BS 5410.
•
Fixing of equipment, components and accessories: Fix securely on purpose-made bases
or supports.
•
Preparation: Immediately before installation of lagging and casing, pressure test joints.
- Results: Submit.
•
Space around the boiler: Adequate:
- to ensure sufficient air circulation for draught diverter operation;
- to ensure sufficient air for combustion and cooling; and
- for maintenance and servicing.
•
Location: Minimum 75 mm from combustible material.
•
Access: Provide for inspection and servicing of boilers and ancillary equipment.
T30
Heat emitters
T30 Heat emitters
To be read with Preliminaries/ General conditions.
PRODUCTS
310
AIR CURTAINS Above entrance door to building as shown within the contract drawings
•
Method for testing and rating: To BS 4856-1,-2,-3 and -4.
•
Type: Water.
•
Requirements: As Air curtain schedule.
320
FAN CONVECTORS Office Spaces
•
Standards: To BS EN 442-1, -2 and -3.
•
Requirements: As Fan convector schedule.
340
NATURAL CONVECTORS Anti-condensation loop in canopy above building entrance
•
Standards: To BS EN 442-1, -2 and -3.
•
Requirements: Submit proposals.
•
Third party certification to RADMAC scheme: Not required.
350
RADIATORS Drying Room
•
Standards: To BS EN 442-1, -2 and -3.
•
Requirements: As Radiator schedule.
•
Third party certification to RADMAC scheme: Not required.
380
TRENCH HEATING Office 0/133.
•
Standards: To BS EN 442-1, -2 and -3.
•
Requirements: As Trench heating schedule .
EXECUTION
610
INSTALLATION GENERALLY
•
Fixing: Securely and parallel or perpendicular to the structure of the building.
•
Stud walls: Fix to studs and/ or noggins.
•
Isolating valve: Provide on flow pipelines.
•
Regulating valve: Provide on return pipelines.
620
INSTALLING UNIT HEATERS AND AIR CURTAINS
•
Suspension: Fix high level supports.
T41
Variable refrigerant flow systems
T41 Variable refrigerant flow systems
To be read with Preliminaries/ General conditions
GENERAL
110
VARIABLE REFRIGERANT FLOW SYSTEM All as indicated on drawing 00-M(54)001
•
Compressor: Submit design and cost proposals.
•
System: Two pipe cooling and heating .
•
Pipelines: Refrigerant pipework and fittings.
•
Pipeline ancillaries: As section Y11.
•
Pumps: Submit design and cost proposals .
•
Thermal insulation: As section Y30.
•
Outlets: Indoor units .
•
Controls: Room sensor control, as section Y40 and Timeclock control, as section Y40.
•
Accessories: Gas detection and alarm systems, as section W57.
•
Completion:
- Cleaning and chemical treatment: Flushing, as section Y12 .
- Plant and equipment identification: Mechanical plant and equipment identification, as
section Y32.
- Commisioning: Commissioning of refrigerating systems, as section Y50.
SYSTEM PERFORMANCE
210
DESIGN
•
Design: Complete the design of the variable refrigerant flow system.
•
Proposals: Submit drawings, technical information, calculations and manufacturers'
literature.
PRODUCTS
330
INDOOR UNITS as detailed in contract drawings
•
Standards: To BS EN 378-1 and -2.
•
Type: 4-way cassette and Floor low level .
•
Manufacturer: as specified in schedules.
- Product reference: as specified in schedules.
•
Output cooling: as specified in schedules.
•
Output heating: as specified in schedules.
•
Accessories: as specified in schedules.
340
REFRIGERANT PIPEWORK AND FITTINGS
•
Standard: To BS EN 378-2.
•
Pipelines: Manufacturer's standard.
EXECUTION
620
INSTALLATION GENERALLY
•
Standards: To BS EN 378-3 and -4.
•
Fixing of equipment, components and accessories: Fix securely on purpose-made bases
or supports.
•
External units: Protect from high winds. Prevent snow from blocking air flow.
•
Access: Provide for inspection and servicing of heat pumps and ancillary equipment.
•
Refrigerant lines: Short and straight.
•
Location of outdoor units: Away from windows and adjacent buildings.
COMPLETION
910
DOCUMENTATION
•
Operation and maintenance instructions: Submit.
•
Record drawings: Submit.
920
MAINTENANCE
•
Servicing and maintenance: Undertake.
- Duration: Until 12 months after Practical Completion.
T50
Chilled water systems
T50 Chilled water systems
To be read with Preliminaries/ General conditions.
GENERAL
110
CHILLED WATER SYSTEM Existing external air cooled chillers serving the fan coil units
•
System: Two pipe.
- Pipeline circuits: Constant flow .
•
Cooling source: Air cooled liquid chiller, as section T60.
•
Pressurization units: As section Y20.
•
Pumps: as section Y20.
•
Pipelines: Refrigerant pipework and fittings, as section T60.
•
Pipelines ancillaries: As section Y11.
•
Thermal insulation: As section Y30.
•
Vibration insolation: as existing.
•
Emitters: Air handling units, as section U81 and Fan coil units, as section U41 .
•
Controls: As section Y40.
•
Accessories: Trace heating, as section Y24.
•
Completion:
- Cleaning and chemical treatment: Flushing and chemical treatment as section Y12 .
- Plant and equipment identification: As section Y32.
- Commissioning: Commissioning of chilled water systems, as section Y50 and
Performance testing, as section Y50.
SYSTEM PERFORMANCE
250
SYSTEM OPERATING PARAMETERS
•
Design flow temperature: 6 ºC.
•
Temperature difference across water circuit: Maximum 6ºC.
•
Water velocity: Maximum 1.5 m/s.
EXECUTION
610
STRIPPING OUT
•
Extent of stripping out: all as illustrated within the contract drawings .
COMPLETION
905
HYDRAULIC PRESSURE TESTING OF CHILLED WATER SYSTEMS
•
Testing: In accordance with HVCA TR/6.
•
Notice (minimum): 24 h.
•
Pressure: 2 times working pressure.
•
Duration of test: 1 h.
910
DOCUMENTATION
•
Operation and maintenance instructions: Submit.
•
Record drawings: Submit.
T60
Central refrigeration plant
T60 Central refrigeration plant
To be read with Preliminaries/ General conditions.
PRODUCTS
320
SAFETY AND ENVIRONMENTAL REQUIREMENTS
•
Standard: To BS EN 378-1, -2, -3 and -4.
•
Leak detection: submit proposals.
330
AIR COOLED LIQUID CHILLERS
•
Standards: To BS EN 14511-1, -2, -3 and -4.
•
Type: Semi-hermetic twin screw.
•
Manufacturer: McQuay existing units to be refurbished .
- Product reference: ALS LN 213.2.
•
Output: 775kW.
•
Refrigerant: R134a.
•
Chilled water entering temperature: 12°C.
•
Chilled water leaving temperature: 6°C.
•
Design ambient temperature: 26°C.
•
Evaporator fouling factor: 0.0440 m²·K/kW.
•
Energy efficiency ratio (EER): as existing.
•
Sound pressure level: as existing.
•
Electrical supply type: as existing.
•
Number of refrigerant circuits: as existing.
•
Compressor start: as existing.
•
Refrigerant circuit accessories: as existing.
•
Evaporators: as existing.
•
Evaporator accessories: as existing.
•
Condenser coils: Internally enhanced, seamless copper tubes mechanically expanded into
aluminium alloy fins with full height collars. Integral subcooler circuit.
•
Condenser fans: as existing.
•
Condenser fan discharge: Vertical.
•
Warning indication: as existing.
•
Accessories: as existing.
430
REFRIGERANT PIPEWORK AND FITTINGS
•
Standard: To BS EN 378-2.
•
Pipelines: To BS EN 12735-1.
EXECUTION
610
INSTALLATION GENERALLY
•
Fixing of equipment and components: Fix on purpose made bases or supports.
•
Pressure testing of joints: Immediately before installation of lagging and casing.
- Results: Submit.
620
INSTALLING CHILLERS
•
Location: Provide adequate space around chillers: For air circulation across the condenser
heat transfer surface and For maintenance and servicing.
•
Access: Provide for inspection and servicing of chiller and ancillary equipment.
640
INSTALLING REFRIGERANT PIPEWORK
•
Standards: To BS EN 378-3 and -4.
•
Refrigerant lines: Short and straight.
U
Ventilation and air conditioning systems
U10
Ventilation systems
U10 Ventilation systems
To be read with Preliminaries/ General conditions
GENERAL
140
MECHANICAL EXTRACT VENTILATION SYSTEM Dining area general extract and unit
fan first floor kitchen
•
Room extract air terminal devices: Grilles, as section U88 and Ventilated ceilings, as
section U88.
•
Air ductwork and ancillaries: Sheet metal ductwork and fittings, circular, as section U80
and Sheet metal ductwork and fittings, rectangular, as section U80 .
- Accessories:
- Dampers, fire and smoke, metal ductwork, as section U80;
- Flexible ductwork, as section U80; and
- Pressure control flaps, as section U80.
•
Thermal insulation on extract air ductwork: Ductwork carrying warm air, as section Y30 .
•
Vibration isolation mountings: to match existing support system .
•
Heat recovery: Not required.
•
Acoustic treatment: as existing.
•
Extract fans: as existing.
•
External exhaust air terminals: as existing.
•
Controls: As section Y40.
•
Completion:
- Identification of ductwork and equipment: As section Y32.
- Testing and commissioning: Ductwork pressure testing, as section U80 and Air
distribution system commissioning, as section Y50 .
150
TOILET EXTRACT VENTILATION SYSTEM Generally
•
Room extract air terminal devices: Grilles, as section U88. .
•
Air ductwork and ancillaries: Sheet metal ductwork and fittings, circular, as section U80
and Sheet metal ductwork and fittings, rectangular, as section U80 .
- Accessories: Dampers, fire and smoke, metal ductwork, as section U80 and Dampers,
pressure, as section U80.
•
Thermal insulation on extract air ductwork: Ductwork carrying warm air, as section Y30 .
•
Vibration isolation mountings: to match existing support system .
•
Acoustic treatment: as existing.
•
Extract fans: as existing.
•
External exhaust air terminals: as existing.
•
Controls: As section Y40.
•
Completion:
- Identification of ductwork and equipment: As section Y32.
- Testing and commissioning: Ductwork pressure testing, as section U80 and Air
distribution system commissioning, as section Y50 .
160
KITCHEN EXTRACT VENTILATION SYSTEM
•
Room extract air terminal devices: to be designed by the kitchen installation specialist .
•
Air ductwork and ancillaries: to be designed by the kitchen installation specialist .
- Accessories: to be designed by the kitchen installation specialist .
•
Thermal insulation on extract air ductwork: to be designed by the kitchen installation
specialist.
•
Vibration isolation mountings: to be designed by the kitchen installation specialist .
•
Acoustic treatment: to be designed by the kitchen installation specialist .
•
Extract fans: to be installed under this contract as detailled in schedule V08 .
•
External exhaust air terminals: as existing.
•
Controls: As section Y40.
•
Completion:
- Identification of ductwork and equipment: As section Y32.
- Testing and commissioning: Ductwork pressure testing, as section U80 and
Performance testing, as section Y50.
PRODUCTS
330
ROOF STACK TERMINALS
•
Manufacturer: Vent-Axia.
- Product reference: roof termination set.
•
Free area: submit proposals.
•
Type: to match extract fan.
•
Size: to match extract fan.
•
Location: Flat roof.
•
Colour: to match roof colour.
•
Appearance: standard.
•
Accessories: bird / insect mesh internally.
EXECUTION
630
INSTALLING DUCTWORK ON AIR HANDLING UNITS
•
Air discharge: Connect ductwork to allow air to straighten as it leaves the air handling unit.
COMPLETION
930
DOCUMENTATION
•
Operation and maintenance instructions: Submit.
•
Record drawings: Submit.
U30
Air conditioning systems
U30 Air conditioning systems
To be read with Preliminaries/ General conditions
GENERAL
110
CENTRALIZED ALL-AIR CONDITIONING SYSTEM Existing AHU plant to be retained,
alterations to ductwork only to be completed under this phase of works
•
Type of system: Single duct, constant volume .
•
External air intake terminals: as existing.
•
Air filters: replace with like for like.
- Accessories: Not required.
•
Heat recovery: as existing.
•
Humidifiers: Not required.
•
De-humidifiers: Not required.
•
Air handling units: As section U81.
•
Silencers and acoustic treatment: as existing.
•
Air ductwork and ancillaries:
- Sheet metal ductwork and fittings, circular, as section U80;
- Sheet metal ductwork and fittings, flat oval, as section U80; and
- Sheet metal ductwork and fittings, rectangular, as section U80 .
- Accessories: as existing.
•
Thermal insulation on supply air ductwork: Ductwork carrying chilled air, as section Y30
and Ductwork carrying warm air, as section Y30 .
•
Vibration isolation mountings: as existing.
•
Reheaters: as existing.
•
Cooling coils: as existing.
•
VAV terminal units: Not required.
•
Room supply air terminal devices:
- Diffusers, as section U88;
- Grilles, as section U88; and
- Ventilated ceilings, as section U88 .
•
Controls: As section Y40.
•
Completion:
- Identification of ductwork and equipment: As section Y32.
- Testing and commissioning:
- Ductwork pressure testing, as section U80;
- Air distribution system commissioning, as section Y50; and
- Performance testing, as section Y50 .
130
FAN COIL UNIT AIR CONDITIONING SYSTEM within offices as detailed in contract
drawings
•
Type of system: Four-pipe.
•
External air intake terminals: Not required.
•
Air filters: In air handling units, as section U81 .
- Accessories: Submit design and cost proposals.
•
Heat recovery: Not required.
•
Humidifiers: Not required.
•
De-humidifiers: Not required.
•
Air handling units: As section U81.
•
Silencers and acoustic treatment: Not required.
•
Air ductwork and ancillaries: Sheet metal ductwork and fittings, circular, as section U80 .
- Accessories: Flexible ductwork, as section U80.
•
Thermal insulation on supply air ductwork: Ductwork carrying chilled air, as section Y30 .
•
Vibration isolation mountings: Not required.
•
Reheaters: Low temperature hot water heating coils, as section U84 .
•
Cooling coils: Chilled water, as section U84 .
•
Room supply air terminals: Air transfer grilles, as section U88 and Diffusers, as section
U88.
•
Controls: As section Y40.
•
Completion:
- Identification of ductwork and equipment: As section Y32.
- Testing and commissioning: Performance testing, as section Y50.
240
DUCTWORK DESIGN
•
Ductwork classification to HVCA DW/144: Submit proposals.
•
Air velocity: As CIBSE Guide B.
•
Air leakage testing: Low pressure ductwork, no ductwork .
•
Ductwork cleaning: To HVCA TR/19.
EXECUTION
610
STRIPPING OUT
•
Extent of stripping out: as detailed within contract drawings .
620
INSTALLING DUCTWORK ON AIR HANDLING UNITS
•
Air discharge: Connect ductwork to allow air to straighten as it leaves the air handling unit.
COMPLETION
930
DOCUMENTATION
•
Operation and maintenance instructions: Submit.
•
Record drawings: Submit.
940
SPARES AND CONSUMABLES
•
Supply the following spares:
- Filters: 2 of each type.
950
MAINTENANCE
•
Servicing and maintenance: Undertake.
- Duration: Until 12 months after Practical Completion.
U41
Fan coil units
U41 Fan coil units
To be read with Preliminaries/ General conditions.
PRODUCTS
310
FAN COIL UNITS all as detailed within the contract drawings and schedules, used
throughout the Phase 2 Office building
•
Performance: To BS 4856.
•
Manufacturer: Ability.
- Product reference: as product schedules.
•
Water temperature:
- Heating flow: 82 ° C.
- Heating return: 71 ° C.
- Chilled water flow: 6 ° C.
- Chilled water return: 12 ° C.
•
Primary air supply :
- Volume: As Fan coil schedule.
- Dry bulb: As Fan coil schedule.
- Wet bulb: As Fan coil schedule.
•
Fan speed: Low.
•
Noise levels: Submit proposals.
•
Electrical supply type: Single phase .
•
Casings: Manufacturer's standard.
•
Mounting: Horizontal.
•
Finish: Manufacturer's standard.
•
Ductwork connections: as detailed within contract drawings .
•
Access: Provide access to filter, fan and motor, valves and controls.
•
Drip tray:
- Position: Under coil, and under control valve where fitted.
- Material: Corrosion resistant.
- Condensation: Insulate external faces to prevent.
•
Controls: as detailed in contract documents.
•
Accessories: as required to complete installation.
EXECUTION
610
FAN COIL UNIT DRAIN LINE
•
Drain connections: Connect drainline flush with bottom of drip tray.
•
Drain line material: plastic.
U60
Local air conditioning systems
U60 Local air conditioning systems
To be read with Preliminaries/ General conditions
GENERAL
120
LOCAL EXTRACT SYSTEM as detailed on ventilation drawings
•
System manufacturer: as schedules.
•
Room extract air terminal devices: Grilles.
•
Air ductwork and ancillaries: Submit design and cost proposals.
- Accessories: Dampers, fire and smoke, metal ductwork, as section U80 and Flexible
ductwork, as section U80
•
Thermal insulation on extract air ductwork: Not required.
•
Vibration isolation mountings: Not required.
•
Silencers and acoustic treatment: Not required.
•
Extract fans: as schedules.
•
External louvres: as schedules.
•
Controls: as schedules.
•
Completion:
- Identification of plant and equipment: As section Y32.
- Testing and commissioning: Performance testing, as section Y50.
SYSTEM PERFORMANCE
210
DESIGN
•
Design: Complete the design of the local air conditioning system.
•
Proposals: Submit drawings, technical information, calculations and manufacturers'
literature.
240
DUCTWORK DESIGN
•
Ductwork classification to HVCA DW/144: Submit proposals.
•
Air velocity: As CIBSE Guide B.
•
Air leakage testing: Submit proposals.
•
Ductwork cleaning: Submit proposals.
PRODUCTS
320
SPLIT COIL ROOM AIR CONDITIONING UNITS Conference room and Comms Room
•
Standards: To BS EN 14511-2, BS EN 14511-3, BS EN 14511-4, BS EN 15218, BS EN
378-1, BS EN 378-2 and BS EN 60335-2-40.
•
Manufacturer as schedules.
- Product reference as schedules.
•
Mounting: as contract drawings.
•
Refrigerant: As Local air conditioning unit schedule .
•
Number of circuits: As Local air conditioning unit schedule .
•
Air volume: As Local air conditioning unit schedule .
•
Resistance: As Local air conditioning unit schedule
•
Cooling load:
- Sensible: As Local air conditioning unit schedule .
- Latent: As Local air conditioning unit schedule .
- Total: As Local air conditioning unit schedule .
•
Heating load: As Local air conditioning unit schedule .
•
Humidification Not required.
•
Electrical supply: as schedules.
•
Heater battery: Electric.
•
Casing finish: as schedules.
•
Access: To filter, fan and motor.
•
Filters: as schedules.
•
Grille: as schedules
•
Insulation: Thermal and acoustic.
•
Controls: as schedules.
•
Condensate drainage: Manufacturer's standard.
330
SPLIT COIL REMOTE AIR COOLED CONDENSING UNITS. external units as shown on
contract drawing 00M(54)001
•
Standards: To BS EN 378-1, BS EN 378-2 and BS EN 60335-2-40.
•
Manufacturer as schedules.
- Product reference as schedules.
•
Duty: As Local air conditioning unit schedule .
•
External noise level: as schedules.
•
Electrical supply: as schedules.
•
Arrangement: One unit serves a single room units.
•
Casing: Weatherproof.
- Material: as schedules.
- Finish: as schedules.
•
Mounting: as schedules.
•
Refrigerant pipeline: Manufacturer's standard.
•
Pipeline insulation: Manufacturer's standard.
360
REFRIGERANT PIPELINES AND FITTINGS
•
Standard: To BS EN 378-2.
•
Pipelines: Manufacturer's standard.
EXECUTION
620
INSTALLING LOCAL AIR CONDITIONING REFRIGERATION
•
Standard: To BS EN 378-3.
COMPLETION
930
DOCUMENTATION
•
Operation and maintenance instructions: Submit.
•
Record drawings: Submit.
U80
Air ductwork and ancillaries
U80 Air ductwork and ancillaries
To be read with Preliminaries/ General conditions
PRODUCTS
305
DAMPERS, FIRE AND SMOKE, METAL DUCTWORK generally.
•
Standard: To BS EN 1366-2.
•
Type: Folding curtain blades out of air stream.
•
Manufacturer: Contractor's choice .
- Product reference: Contractor's choice.
•
Material: contractors lchoice.
•
Accessories: External visual indication of fire damper blade position .
•
Fusible links fusing temperature: 72°C.
307
DAMPERS, FIRE AND SMOKE, INTUMESCENT generallly.
•
Standard: To BS ISO 10294-5.
•
Type: Intumescent.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
310
DAMPERS, NON-RETURN generally.
•
Standard: To BS EN 1751.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Leakage through closed blades: Class 0.
•
Casing leakage: A.
•
Pressure: Negative.
•
Material: Galvanized sheet steel frame and aluminium blades. .
330
DAMPERS, SHUT OFF generally.
•
Standard: To BS EN 1751.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Leakage through closed blades: 1.
•
Casing leakage: A.
•
Pressure: Negative.
•
Setting: 100%.
•
Material: Galvanized sheet steel .
•
Control method: Pneumatic.
340
FLEXIBLE DUCTWORK generally
•
Standard: To HVCA DW/144.
•
Manufacturer: Contractor's choice .
- Product reference: Contractor's choice.
•
Material: Aluminium and polyester laminate encapsulating high tensile steel wire helix .
350
GUARDS, BIRD
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Black PVC coated 12 mm square mesh steel wire. Wire gauge at least 1 mm.
360
GUARDS, INSECT
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Black PVC coated 3.15 mm square mesh steel wire. Wire gauge at least 1 mm.
380
ACCESS DOORS generally.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Submit proposals.
FABRICATION
520
FIRE RATED AND SMOKE EXTRACT DUCTWORK AND FITTINGS generally.
•
Standard: To HVCA DW/144.
•
Fire resistance to BS 476-24: generally.
- Stability: 60 minutes.
- Integrity: 60 minutes.
- Insulation: 60 minutes.
•
Method of protection: Using fire dampers.
- Material: Stainless steel.
- Accessories: External visual indication of fire damper blade position .
- Fusible links fusing temperature: 72°C.
•
Accessories:
- Materials: Compatible with ductwork.
- Finish: Match ductwork.
550
SHEET METAL DUCTWORK AND FITTINGS, CIRCULAR generally
•
Standards: To HVCA DW/144, BS EN 1506 and BS EN 12237.
•
Classification to DW/144: Class A.
•
Air leakage testing: Required.
•
Special installations: Not applicable.
•
Material: Zinc coated steel.
•
Construction: Spirally wound .
•
Regulating dampers:
- Balancing type: Opposed blade .
- Operation: Manual.
- Material: To match ductwork.
•
Flexible joint connections: Fit on fan inlets and outlets and at building expansion joints.
•
Hangers and supports
- Strength requirements: To BS EN 12236.
•
Access openings:
- Function:
- Inspection;
- Cleaning; and
- Maintenance.
- Sizes: As DW 144 Appendix D.
560
SHEET METAL DUCTWORK AND FITTINGS, RECTANGULAR generally
•
Standards: To HVCA DW/144 and BS EN 1505.
•
Classification to DW/144: Class A.
•
Air leakage testing: Required.
•
Special installations: Not applicable.
•
Material: Zinc coated steel.
•
Regulating dampers:
- Balancing type: Opposed blade .
- Operation: Manual.
- Material: To match ductwork.
•
Flexible joint connections: Fit on fan inlets and outlets and at building expansion joints.
•
Hangers and supports
- Strength requirements: To BS EN 12236.
•
Access openings:
- Function:
- Inspection;
- Cleaning; and
- Maintenance.
- Sizes: As DW 144 Appendix D.
EXECUTION
610
GENERAL
•
Cut edges on ductwork, flanges and supports: Smooth and burr free.
640
INSTALLATION OF SHEET METAL DUCTWORK
•
Standard: To HVCA DW/144.
- Other requirements: Proprietary ductwork support system.
•
Installing flexible joint connections: Minimize pressure drop.
650
SUPPORT OF AIR TERMINALS UNITS IN CEILING GRIDS
•
Standard: To HVCA DW/144.
•
Special supports: n/a.
•
Position: Agree final position of air terminals before installation .
670
DUCTWORK SUPPORT FOR VAPOUR SEAL CONTINUITY
•
Method of support: vapour barrier between support and duct .
690
DRAINAGE OF DUCTWORK
•
Ductwork: Install to drain entrained moisture
•
Joints: Lap to minimize moisture leakage.
700
TEST HOLES
•
Location: In accordance with CIBSE Commissioning Code Series A and HVCA DW/144.
740
INSTALLING CONTROL EQUIPMENT
•
General: Fit sensors, damper motors and other control equipment.
750
INSTRUMENT CONNECTIONS
•
General: Connect instruments.
760
ACCESS TO DAMPERS FOR RESETTING AND MAINTENANCE
•
Location: Provide access to damper mechanisms on fire dampers; smoke dampers;
combined smoke and fire dampers; and volume control dampers through access doors,
false ceilings etc. Where more than one fire damper is installed in a frame provide access
to all fire dampers.
•
Fire links: Provide access so that they can be replaced.
790
DUCTWORK CLEANLINESS generally
•
Cleaning: In accordance with HVCA TR/19.
•
Level of protection: PD1.
COMPLETION
960
FIRE DAMPER SPARES
•
Fusible links: Supply spares.
- Quantity: 4.
U81
Air handling units
U81 Air handling units
To be read with Preliminaries/ General conditions
PRODUCTS
310
AIR HANDLING UNITS as existing require only servicing and commissioning under this
contract
•
Standard: To BS EN 13053.
•
Manufacturer: McQuay.
- Product reference: ESA.
•
Duty: as exisitng.
•
Environment: Internal.
•
Construction: Double skin.
•
Arrangement: as existing.
•
Method of support: as existing.
•
Components: as existing.
•
Positions for maintenance access: as existing.
•
Direction of airflow: as existing.
330
PRIMARY FILTERS to be checked and replaced if required
•
Standards: To BS EN 779 and Eurovent 4/9.
•
Class of filter: as existing.
•
Filter type: as existing.
•
Flammability: Non-flammable.
•
Access: as existing.
340
SECONDARY FILTERS to be checked and replaced if required
•
Standards: To BS EN 779 and Eurovent 4/9.
•
Class of filter: as existing.
•
Type of filter: Bag.
•
Flammability: Non-flammable.
•
Access: as existing.
360
PREHEATERS as existing
•
Medium: Low temperature hot water .
•
Materials: Manufacturer's standard.
370
COOLING COILS as existing
•
Medium: Chilled water .
•
Materials: Manufacturer's standard.
•
Airflow: Evenly distributed over face area of coil.
•
Air velocity: Ensure it is below level at which moisture carryover occurs.
•
Condensate drain lines: Trap to prevent flooding.
- Size: At least that of the drain pan connection.
380
REHEATER as existing
•
Medium: Low temperature hot water .
•
Materials: Manufacturer's standard.
390
FANS as existing
•
Performance: In accordance with BS 6583.
•
Type of fan: as existing.
•
Motor mounting: as existing.
•
Blow through units: Arrange section to allow uniform velocity profile downstream.
•
Accessories: as existing.
405
ATTENUATOR as existing.
•
Performance requirements: To BS EN ISO 7235 and BS EN ISO 11691.
- Insertion loss: as existing.
•
Lining material: Inert, fire proof, inorganic and non-hygroscopic.
•
Splitters: as existing.
COMPLETION
910
PRE-COMMISSIONING OF COILS
•
Preparation:
- Remove protective covering.
- Check frost protection and drain if heat is not available in freezing conditions.
- Straighten fins.
•
Cleaning and chemical treatment: Use chemicals compatible with the materials in the coils.
920
AIR LEAKAGE TESTING
•
Testing: In accordance with HEVAC Guide to air handling unit leakage testing.
930
TESTING
•
Test location: on site.
•
Tests:
- Component air pressure drops;
- Fan and motor speeds; and
- Fan running to check rotation and vibration .
•
Test results: Submit.
U82
Fans
U82 Fans
To be read with Preliminaries/ General conditions
PRODUCTS
320
CENTRIFUGAL FANS Kitchen canopy extract
•
Performance: To BS 848-1.
- Inlet and outlet arrangement: D.
•
Application: Extract.
•
Manufacturer: Nuaire.
- Product reference: SQF45-3ESBC.
•
Duty:
- Air volume: As Fan schedule.
- Resistance: As Fan schedule.
- Fan speed: As Fan schedule.
- External static resistance: As Fan schedule.
- Sound power level spectrum: Manufacturer's standard.
•
Mechanical safety: To BS 848-5.
•
Electrical safety: To BS EN 60335-2-80.
•
Dimensions: To BS 848-4.
•
Operating conditions:
- Environment: Condensation.
- Air density: 1.20 kg/m3.
•
Operation: Single.
•
Variable air volume method: Variable speed drive.
•
Motor and drive: Match fan.
•
Casing: Single inlet single width .
•
Inspection doors: Fit airtight doors in scroll and cover.
•
Mounting: contractors choice.
•
Material Manufacturer's standard.
•
Anti-vibration mountings: Manufacturer's standard.
•
Flexible duct connections: Manufacturer's standard.
•
Accessories: Speed controller.
370
CONSTRUCTION AND HANDLING
•
Casings: Rigid, so there is no drumming under operating conditions.
•
Lifting: Provide lifting eyebolts or similar facilities on fans or sections heavier than 20 kg.
EXECUTION
610
INSTALLATION
•
Fixing: Use fixing points provided. Do not strain the fan structure when bolts are tightened.
•
Orientation: Mount impeller shaft horizontally.
•
Alignment: Install fan to allow optimum air flow path.
U87
Silencers and acoustic treatment
U87 Silencers and acoustic treatment
To be read with Preliminaries/ General conditions
PRODUCTS
330
AIR TRANSFER AND CROSS TALK ATTENUATORS Ground floor as illustrated on
contract drawings
•
Manufacturer: Trox.
- Product reference: as contract schedules.
•
Performance requirements: To BS EN ISO 7235 and BS EN ISO 11691.
- Insertion loss: See Silencer schedule.
- Air flow: See Silencer schedule.
- Permissible pressure loss: See Silencer schedule .
•
Casing material: Metal.
•
Lining material: Inert, fire proof, inorganic and non- hygroscopic.
•
Duct connections: Manufacturer's standard.
EXECUTION
610
ACOUSTIC LININGS
•
Access: Where personnel access is provided, protect acoustic linings to prevent damage.
U88
Air terminal devices
U88 Air terminal devices
To be read with Preliminaries/ General conditions
PRODUCTS
330
DIFFUSERS generally
•
Performance:
- Mixed flow applications: To BS EN 12238.
- Sound power levels: To BS EN ISO 5135.
•
Application: Supply and extract.
•
Manufacturer: Trox.
- Product reference: as contract schedules.
•
Duty: As Grille and diffuser schedule .
•
Core velocity (maximum): As Grille and diffuser schedule .
•
Sound power levels: As Grille and diffuser schedule.
•
Diffuser: Multi-core.
•
Shape: Rectangular.
•
Arrangement: As contract schedules.
•
Position: Ceiling.
•
Material: manufacturers standard.
- Finish: Epoxy resin powder/ hardener coating .
360
DIFFUSERS, LINEAR generally
•
Performance:
- Mixed flow applications: To BS EN 12238.
- Sound power levels: To BS EN ISO 5135.
•
Application: Supply and extract.
•
Manufacturer: Trox.
- Product reference: as detailed in contract schedules.
•
Duty: As Grille and diffuser schedule .
•
Core velocity (maximum): As Grille and diffuser schedule .
•
Sound power levels: As Grille and diffuser schedule.
•
Diffuser: Slot.
•
Arrangement: as grille and diffuser schedule.
•
Position: Ceiling and walls .
•
Material: Aluminium.
- Finish: Epoxy resin powder/ hardener coating .
390
GRILLES Generally
•
Performance:
- Mixed flow applications: To BS EN 12238.
- Displacement flow applications: To BS EN 12239.
- Sound power levels: To BS EN ISO 5135.
•
Application: Extract.
•
Manufacturer: trox.
- Product reference: as detailed in contract schedules.
•
Duty: As Grille and diffuser schedule .
•
Core velocity (maximum): As Grille and diffuser schedule .
•
Sound power levels: As Grille and diffuser schedule.
•
Shape: Square.
•
Grille type: Eggcrate.
•
Position: Ceiling.
•
Material: Aluminium.
- Finish: Manufacturers standard.
410
PLENUM BOXES, CEILING OR WALL MOUNTED generally
•
Duty: As Grille and diffuser schedule .
•
Configuration: Single plenum box or a series of plenum boxes butted together to form a
continuous length.
•
Construction: Sturdy and rigid with circular inlet spigots of 65 mm minimum length.
•
Fixing: Incorporate means for fixing to, or suspending from, building or other construction.
430
VENTILATED CEILINGS generally
•
Manufacturer: all as detailed in contract drawings.
- Product reference: n/a.
•
Duty: as illustrated in contract drawings .
•
Core velocity (maximum): As Grille and diffuser schedule .
•
Sound power levels: As Grille and diffuser schedule.
•
Application: Supply and extract.
•
Air distribution: Mixed flow.
EXECUTION
610
INSTALLATION
•
General: Do not distort air terminal devices. Fix securely.
•
Air leakage: Prevent. Seal joints with self adhesive foam strip or equivalent.
•
Appearance: Finish visible edge joints neatly. Do not leave sharp edges and protruding
screws.
620
FIXING CIRCULAR AND RECTANGULAR DIFFUSERS
•
Method: Flange screw.
640
FIXING LINEAR AND SLOT DIFFUSERS
•
Method: Bracket from plenum box.
660
FIXING GRILLES
•
Method: Visible, flange screw fixing.
670
OPERATION
•
General: Fit so that moving parts operate correctly and removable cores can be taken out
and replaced.
•
High level and ceiling applications: On removable cores, provide safety wires with quick
release ends.
680
BLANKING PLATES
•
Location: Where needed to restrict projection of air flow from section of grille or diffuser.
COMPLETION
910
SPARES
•
Loose keys: Supply for adjusting each size and type of grille, and for operating
accessories.
- Quantity: 5.
Y
General engineering services
Y10
Pipelines
Y10 Pipelines
To be read with Preliminaries/ General conditions.
GENERAL
110
STEEL PIPELINES
- FOR CHILLED WATER SYSTEMS;
- FOR LOW TEMPERATURE HOT WATER HEATING SYSTEMS;
- FOR NATURAL GAS SUPPLY SYSTEMS; and
- FOR SPRINKLER SYSTEMS
•
Thickness series for tubes to BS EN 10255: Medium .
•
Quality for tubes to BS EN 10216-1 or BS EN 10217-1: TR1.
•
Finish: Varnish.
•
Jointing method:
- Permanently concealed: Welded class 1.
- Accessible: Screwed up to and including 50 mm or Welded and flanged 65 mm and
over.
120
COPPER PIPELINES water services
•
Standard: To BS EN 1057
- Grade: R220.
Finish: Plain.
•
Jointing method:
- Permanently concealed: Brazed.
- Accessible: Compression up to 54 mm and Brazed.
136
PLASTICS CONDENSATE DRAINAGE PIPELINES Fan coil units require extension to
existing condensate pipework determined by final location of unit.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Pipe and fittings: to match existing.
- Classification to BS 7291-1: Class S
- Classification to BS EN ISO 15875-1 or BS EN ISO 15877-1: Class 1.
- Colour: Contractor's choice.
•
Jointing method: To suit tube.
PRODUCTS
310
STEEL TUBES
•
< 150 mm: To BS EN 10255.
•
150 mm and above: To BS EN 10216-1 and BS EN 10217-1.
320
JOINTING MATERIALS FOR STEEL TUBES
•
Jointing compound: To BS 6956-5.
•
PTFE tape: To BS EN 751-3.
•
Flange jointing rings: To BS EN 1514-4.
•
Elastomeric gaskets: To BS EN 681-1.
•
Welding rods:
- Gas welding: To BS EN 12536.
- Arc welding: To BS EN ISO 636.
330
FITTINGS FOR STEEL TUBES
•
Malleable: To BS 143 and BS 1256.
•
Flanged: To BS EN 1092-1.
•
Welded: To BS EN 10253-1 and BS EN 10253-2.
•
Mechanical couplings: Manufacturer's standard.
340
COPPER TUBES
•
Standard: To BS EN 1057.
- Buried R220.
- Above ground R250.
350
JOINTING MATERIALS FOR COPPER TUBES
•
Solder for capillary fittings: To BS EN ISO 9453.
•
Lead free solder for capillary fittings: To BS EN ISO 9453.
•
Brazing filling: To BS EN 1044.
•
Flange jointing rings: To BS EN 1514-4.
360
FITTINGS FOR COPPER TUBES
•
Capillary: To BS EN 1254-1.
•
Compression: To BS EN 1254-2.
•
Flanges: To BS EN 1092-3.
•
Press fittings: To manufacturer's standard.
375
CROSS LINKED POLYETHYLENE (PE-X) TUBES
•
Standard:
- Pipe: BS 7291-3.
- Fittings: BS 7291-3.
379
CHLORINATED POLYVINYLCHLORIDE (PVC-C) TUBES
•
Standard:
- Pipe: To BS EN ISO15877-2.
- Fittings: To BS EN ISO 15877-3.
381
UNPLASTICIZED POLYVINYLCHLORIDE (PVC-U) TUBES
•
Standard:
- Pipe: To BS EN 1452-2.
- Fittings: To BS EN 1452-3.
385
JOINTING MATERIALS FOR PLASTICS TUBES
•
Standards:
- Compression: To BS EN 1254-3.
- Electrofusion: To BS EN 12201-3.
- Socket and spigot: To BS EN 12201-3.
- Solvent cement: To BS EN 1452-3.
- Elastomeric ring seal: To BS EN 1452-3.
EXECUTION
605
PIPELINES INSTALLATION GENERALLY
•
Installation: In accordance with the latest edition of HVCA TR/20.
•
Appearance: Install exposed pipe runs parallel with other pipe or service runs and building
structure, taking account of gradients for draining or venting. Set vertical pipes plumb, or
follow building line.
•
Gradients: Install with gradients to allow drainage and air release.
•
Air venting: Provide vents at high points.
•
Draining: Provide drains at low points.
•
Pipeline expansion and contraction: Arrange supports and fixings to accommodate pipeline
movement caused by the thermal changes. Allow for movement at branch connections.
•
Pipeline support: Arrange supports and accessories for equipment, appliances and
ancillary fitments in pipelines, so that no undue strain is imposed upon pipes.
•
Dirt, insects and rodents: Prevent ingress.
610
SPACING OF PIPELINES
•
Minimum clearance between insulated pipelines and:
- Wall finish: 25 mm.
- Ceiling finish or soffit: 100 mm.
- Floor finish: 150 mm.
- Electrical services: 150 mm.
- Adjacent services: 100 mm.
- Uninsulated pipeline: 75 mm.
- Another insulated pipeline: 25 mm.
•
Minimum clearance between uninsulated pipelines and:
- Wall finish: 25 mm.
- Ceiling finish or soffit: 100 mm.
- Floor finish: 150 mm.
- Electrical services: 150 mm.
- Adjacent services: 150 mm.
- Another uninsulated pipeline: 25 mm.
620
PIPELINE SUPPORTS Generally
•
Type: Submit proposals.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
- Material: Steel.
621
PIPELINE SUPPORT BRACKETS
•
Type: Submit proposals.
•
Finish: Match pipeline supports.
625
PIPELINE FITTINGS
•
Reductions and enlargements:
- On horizontal pipeline runs: Eccentric.
- On vertical pipeline runs: Concentric.
•
Bushes: Use only at radiators.
•
Square tees: Provide at vent and drain points.
•
Square elbows: Do not use.
•
Fabricated junctions and fittings: Same material as the main pipeline.
•
Demountable joints: Regularly spaced along pipeline runs and at items of equipment.
630
PIPELINE SLEEVES
•
Sleeves: Fit to pipes passing through building fabric.
•
Material: Match pipeline.
•
Size: One or two sizes larger than pipe to allow clearance.
•
Finish: Install sleeves flush with building finish. In areas where floors are washed down,
install protruding 100 mm above floor finish.
•
Masking plates: Fit at visible penetrations, including through false ceilings of occupied
rooms.
635
DISSIMILAR METALS
•
Electrolytic corrosion: Prevent.
640
ANCHORS GENERALLY
•
Design: To resist axial stress transmitted by flexure of horizontal and vertical pipe runs,
and loading on vertical pipes.
•
Fixings: Provide associated backing plates, nuts, washers and bolts for attachment to, or
building into building structure.
•
Building structure: Suitable for transmitted stress.
645
ANCHORS FOR STEEL PIPES
•
Anchor: Two slip on flanges welded to pipes, bolted together through a mild steel channel
section.
•
Fixing: Bolted to building structure.
•
Pipe restraints: Mild steel overstraps or heavy U-bolts welded to pipes.
650
ANCHORS FOR COPPER PIPES
•
Anchor: Two flanges fixed to copper female adaptors.
•
Anchor fixing: Bolted to building structure .
•
Pipe restraints: Saddle clamps.
655
ANCHORS FOR PVC PIPES
•
Anchor: PVC coated overstraps or clamps, with polypropylene strip between pipe and mild
steel section.
•
Anchor fixing: Bolted to building structure .
660
SLIDE GUIDES
•
Expansion and contraction: Direct movement from pipe anchor points towards loops,
bellows or flexible inserts.
•
Thrust: Linear relative to the axis of pipe.
•
Friction: Apply a friction reducing material between metal faces subjected to movement.
665
WELDING STEEL PIPEWORK GENERALLY
•
Standard: In accordance with HVCA TR/5.
•
Welder identification: Mark each weld to identify operative .
•
Non-destructive testing method: Submit proposals.
•
Completed welds: Wire brush and protect from corrosion.
670
FLANGED JOINTS IN STEEL PIPES
•
Preparation:
- Flange mating faces: Parallel.
- Flange peripheries: Flush with each other.
- Bolt holes: Align correctly.
•
Welded flanges: Weld neck and bore of 'slip on' flanges. Butt weld neck of welding neck
flanges.
•
Screwed flanges: Apply jointing materials. Screw on flange. Expand tube into flange.
•
Making and sealing: Insert jointing between flange mating faces. Tighten joint equally all
round.
675
SCREWED JOINTS IN STEEL PIPES
•
Preparation of plain ends: Cut square. Ream out bore. Screw, taper thread.
•
Making and sealing: Coat male pipe threads with jointing compound and hemp, or PTFE
tape on small sizes. Immediately after connect with female end of socket or fitting, and
tighten. Remove coating intruding into pipe. Leave joint clean.
680
MECHANICAL JOINTS IN GROOVED STEEL AND STAINLESS STEEL PIPES
•
Preparation: Cut ends square, free of bumps, dents and score marks within manufacturer's
tolerances. Form groove and assemble.
•
Making and sealing: Thoroughly lubricate gasket, externally and internally. Stretch over
pipe end and bring pipe ends together. Slide gasket into central position over both pipe
ends. Position joint half housings over gasket and insert bolts, nuts and electrical continuity
clip if required. Tighten bolts. Check alignment of joint and pipework.
690
BRAZED JOINTS IN COPPER AND COPPER ALLOY PIPES
•
Preparation, marking and sealing: In accordance with BS EN 14324.
•
Brazing alloy filler: Silver.
700
CAPILLARY JOINTS IN COPPER PIPES
•
Standard: To BS EN 1254-1.
•
Preparation: Cut square and deburr. Clean plain ends using fine steel wool.
•
Making and sealing: Do not use excess flux. Make joint. Clean off traces of flux when
completed.
710
COMPRESSION JOINTS IN COPPER PIPES
•
Standard: To BS EN 1254-2.
•
Preparation: Cut square and deburr.
•
Making and sealing:
- Type A: Compress ring onto the wall of the tube.
- Type B: Compress the formed portion of the tube against the formed end of the fitting.
715
MECHANICAL JOINTS IN GROOVED COPPER PIPES
•
Preparation: Cut ends square, free of bumps, dents and score marks within manufacturer's
tolerances. Form groove and assemble.
•
Making and sealing: Thoroughly lubricate gasket, externally and internally. Stretch over
pipe end and bring pipe ends together. Slide gasket into central position over both pipe
ends. Position joint half housings over gasket and insert bolts, nuts and electrical continuity
clip if required. Tighten bolts. Check alignment of joint and pipework.
745
JOINTS IN PVC PIPES
•
Type: Solvent welded generally, and ring seal at expansion joints.
•
Preparation: Cut plain ends square and deburr. Clean plain ends using solvent cleaner.
750
FUSION JOINTS IN POLYETHYLENE PIPES
•
Preparation: Cut plain ends square. Form pipe ends for socket type joints.
755
MECHANICAL FITTINGS FOR POLYETHYLENE PIPES
•
Preparation: Cut plain ends square. Check wall thickness and pressure rating of fitting.
COMPLETION
910
GENERAL INSPECTION AND TESTING
•
Inspection of joints: Cut out, cut open and inspect.
- Number of joints: 2 .
•
Safety precautions: In accordance with HSE GS4.
Y11
Pipeline ancillaries
Y11 Pipeline ancillaries
To be read with Preliminaries/ General conditions.
GENERAL
110
PIPELINE ANCILLARIES FOR INCOMING MAINS WATER SUPPLY
•
Water supply: Potable water.
•
Accessories: Not required.
120
PIPELINE ANCILLARIES FOR HOT AND COLD WATER SUPPLY
•
Float valves: Diaphragm type, plastics and Floats for ball valves .
•
Isolating valves: Ball valves, copper alloy and Gate valves, copper alloy .
•
Check valves: Swing type.
•
Regulating valves: Double regulating.
•
Mixing valves: Thermostatic mixing valves.
•
Draining devices: Draining taps.
•
Expansion devices: Submit proposals.
•
Vibration isolation: Submit proposals.
•
Gauges: Temperature.
•
Accessories:
- Backflow prevention devices;
- Heat meter;
- Pipeline strainers; and
- Tundishes.
130
PIPELINE ANCILLARIES FOR HEATING SYSTEMS
•
Isolating valves: Ball valves, cast iron or steel and Gate valves, cast iron .
•
Check valves: Swing type.
•
Regulating valves: Double regulating.
•
Radiator valves: not required.
•
Draining and venting devices: Automatic air vents and Draining taps .
•
Expansion devices: Submit proposals.
•
Vibration isolation: Submit proposals.
•
De-aerators: Not required.
•
Separators: Not required.
•
Gauges: Pressure and altitude and Temperature.
•
Accessories:
- Heat meter;
- Pipeline strainers;
- Safety valves; and
- Tundishes.
140
PIPELINE ANCILLARIES FOR CHILLED WATER AND CONDENSER WATER SYSTEMS
•
Isolating valves: Ball valves, cast iron or steel and Gate valves, cast iron .
•
Check valves: Swing type.
•
Regulating valves: Double regulating.
•
Draining and venting devices: Air bottles and Draining taps .
•
Expansion devices: Submit proposals.
•
Vibration isolation: Submit proposals.
•
De-aerators: Submit proposals.
•
Separators: Combined air and dirt separators.
•
Gauges: Pressure and altitude and Temperature.
•
Accessories:
- Heat meter;
- Pipeline strainers; and
- Test points.
150
PIPELINE ANCILLARIES FOR HEAT PUMP SYSTEMS
•
Isolating valves: Submit proposals.
•
Check valves: Swing type and Submit proposals .
•
Draining devices: Draining taps.
•
Gauges: Submit proposals.
•
Accessories: Submit proposals.
PRODUCTS
302
CONNECTIONS FOR ANCILLARIES
•
Capillary: To BS EN 1254-1.
•
Compression for copper tubes: To BS EN 1254-2.
•
Compression for plastics pipes: To BS EN 1254-3.
•
Flanged for cast iron: To BS EN 1092-2.
•
Flanged for copper alloy: To BS EN 1092-3.
•
Threaded:
- Where pressure-tight joints are made on the threads: To BS 21 or BS EN 10226-1.
- Where pressure-tight joints are not made on the threads: To BS EN ISO 228-1
305
WATER SUPPLY - DRAW OFF TAPS AND STOP VALVES Generally
•
Standard: To BS 1010.
•
Type: Straight pattern.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Dezincification resistant brass (DZR) copper alloy.
•
Connections: Union.
309
WATER SUPPLY - STOP VALVES FOR POTABLE WATER Generally
•
Standard: To BS EN 1213.
•
Type: Straight.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Copper alloy.
•
Connections: Compression.
319
FLOAT OPERATED VALVES, DIAPHRAGM TYPE, PLASTICS BODY In any new cold
water cistern fitted
•
Standards: To BS 1212-3.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Seat: High pressure.
•
Connections: Side entry.
331
ISOLATING VALVES - BALL VALVES, CAST IRON OR STEEL Generally.
•
Standard: To BS ISO 7121.
•
Type: Full bore.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Carbon steel.
•
Connections: to suit pipe size.
•
Options: Handwheel.
333
ISOLATING VALVES - BALL VALVES, COPPER ALLOY at alll appliances/draw offs to
allow access for maintenance
•
Manufacturer: Contractor's choice .
- Product reference: Contractor's choice.
•
Material: Brass copper alloy .
•
Connections: Compression .
•
Finish: Chrome plated.
339
ISOLATING VALVES - GATE VALVES, CAST IRON generally
•
Standard: To BS EN 1171.
•
Type: Non-rising stem.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Iron type: Malleable.
•
Connections: Flanged.
341
ISOLATING VALVES - GATE VALVES, COPPER ALLOY Generally
•
Standard: To BS 5154 or BS EN 12288.
•
Type: Solid or split wedge.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Series: A.
•
Material: Copper alloy.
•
Connections: Compression.
•
Stem: Inside screw non-rising stem.
•
Options: Handwheel.
•
Accessories: Metallic renewable seat/ disk rings.
343
ISOLATING VALVES - GLOBE VALVES, CARBON STEEL generally
•
Standard: To BS EN 13709.
•
Type: Straight.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Connections: Flanged.
347
ISOLATING VALVES - GLOBE VALVES, COPPER ALLOY Generally
•
Standard: To BS 5154 or BS EN 12288.
•
Type: Straight.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Series: A.
•
Connections: Flanged.
•
Stem: Inside screw non-rising stem .
•
Options: Handwheel.
•
Accessories: Metallic renewable seat/ disk rings.
357
CHECK VALVES, SWING TYPE generally
•
Standard: To BS 5154 or BS EN 12288.
•
Type: Horizontal.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice
•
Series: A.
•
Material: Copper alloy.
•
Connections: Threaded or flanged to suit pipe.
365
REGULATING VALVES - DOUBLE Generally
•
Standard: To BS 7350.
•
Type: Globe.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: to suit pipework.
•
Connections: to suit pipework.
375
THERMOSTATIC MIXING VALVES At basins and sinks as detailed in contract drawings
•
Standard: To BS EN 1111.
•
Type: Without flow control device.
•
Manufacturer: Reliance Water Controls.
- Product reference: Submit proposals.
401
DRAINING AND VENTING DEVICES - AUTOMATIC AIR VENTS At all system high points
•
Type: Vertical inlet.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Gunmetal.
•
Connections: Threaded.
403
DRAINING AND VENTING DEVICES - DRAINING TAPS At all system low points
•
Standard: To BS 2879.
•
Type: 1.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Bronze.
•
Connections: Threaded.
415
EXPANSION DEVICES - EXPANSION COMPENSATORS, LATERAL as required
•
Standards: In accordance with BS 6129-1 and to BS ISO 15348.
•
Type: contractors choice.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material:
- Bellows: Stainless steel 1.4571 (316 Ti), to BS EN 10088-1
- Inner sleeve: Stainless steel 1.4541 (321), to BS EN 10088-1
- Tie bars: Gr 8.8, to BS EN ISO 898-1, zinc plated
•
Connections: Flanged
421
VIBRATION ISOLATION - FLEXIBLE HOSES to fan coil units
•
Type: Stainless steel braided pre-lagged .
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Ethylene propylene diene monomer (EPDM) rubber hose with stainless steel
braid.
•
Connections:
- Rubber cored: to suit application .
- Stainless steel: to suit application.
439
COMBINED AIR AND DIRT SEPARATORS Plantroom
•
Type: Vertical housing with internal large surface area mechanism to remove microbubbles
via coalescence effect.
•
Manufacturer: tbc.
- Product reference: tbc.
•
Material: Carbon steel.
•
Connections: tbc.
451
GAUGES, PRESSURE AND ALTITUDE generally
•
Standard:
- Bourdon: To BS EN 837-1.
- Diaphragm: To BS EN 837-3.
•
Diameter: 63 mm.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Case: Stainless steel.
•
Connections: 'Ring' pattern siphon and gauge cock .
453
GAUGES, TEMPERATURE Generally.
•
Standard: To BS EN 13190.
•
Type: Mercury in steel.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Diameter: 63.
•
Case: Brass.
•
Connections: Straight stem.
•
Integral accessories: 100 mm immersion length pocket.
465
ACCESSORIES - BACKFLOW PREVENTION DEVICES Domestic hot water cylinder.
•
Standards:
- Anti-pollution check valves: To BS EN 13959.
- Check valves: To BS 6282-1.
- Combined check and anti-vacuum valves: To BS 6282-4.
- Hose union: To BS EN 14454.
- In-line anti-vacuum valves: To BS EN 14451.
- Terminal anti-vacuum valves: To BS 6282-2.
•
Type: EA.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Copper alloy.
•
Connections: Threaded.
466
HEAT METERS Where illustrated on contract drawings
•
Standard: To BS EN 1434-1.
•
Manufacturer: Switch2.
- Product reference: TBC.
•
Type: In line.
•
Display: Fixed with link to BMS.
•
Orientation: Horizontal.
•
Temperature sensors: Immersion.
•
Temperature range: 2-30° C and 10-130°C.
•
Flow rate:
- Nominal: refer to schedule.
- Maximum: refer to schedule.
•
Connection type: Contractor's choice.
- Size: refer to schedule.
•
Environmental class: C.
•
Enclosure:
- Ingress protection to BS EN 60529: IP65.
•
Pulsed output: Required.
•
Power supply: Mains 230 V.
•
Communication interfaces: M-BUS.
•
Accessories: None.
467
ACCESSORIES - PIPELINE STRAINERS generally
•
Type: Y pattern.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: Dezincification resistant brass (DZR) .
•
Connections: to suit pipe work.
•
Integral accessories: Plugged connections for drain, air vent and differential pressure
monitoring.
469
ACCESSORIES - SAFETY VALVES Calorifier
•
Standard: To BS EN ISO 4126-1.
•
Type: to manufacturers standard.
•
Manufacturer: ACV.
- Product reference: manufacturers standard.
•
Material: manufacturers standard.
•
Connections: to suit pipe work.
473
ACCESSORIES - TUNDISHES Calorifier
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Material: contractors choice.
•
Connections: Diameter to suit drain line.
FABRICATION
510
CONTRACTOR FABRICATED ANCILLARIES
•
Proposals: Submit.
•
Content: Include the following:
- Overall dimensions.
- Shop fabrication drawings.
520
EXPANSION LOOPS, COPPER GENERALLY
•
Standard: To BS EN 1057.
•
Type: Formed bends from single pipe length.
530
EXPANSION LOOPS, STEEL GENERALLY
•
Standard: To BS EN 10255.
•
Type: Formed bends from single pipe length.
EXECUTION
610
INSTALLATION OF VALVES GENERALLY
•
Installation: In accordance with BS 6683.
•
Location: As contract drawings.
•
Isolation and regulation valves: Provide at equipment and on subcircuits.
•
Access: Locate valves so they can be readily operated and maintained. Locate next to
equipment which is to be isolated.
•
Connection to pipework: Fit with joints that suit the pipe material.
615
INSTALLATION OF VALVE STUFFING BOXES
•
Adjustment: Carry out at normal plant operating temperature and pressure. Do not impair
valve action, e.g. by over-tightening.
620
INSTALLATION OF DOUBLE REGULATING VALVES
•
Locations: Provide10 diameters of straight pipe upstream of valve and 5 diameters
downstream.
660
INSTALLATION OF VENT COCKS
•
Discharge pipes: Provide at outlets of ventcocks.
665
INSTALLATION OF DISCHARGE CONNECTIONS
•
Safety and relief valves: Terminate at a safe discharge point.
•
Vent cocks: Terminate 150 mm above floor level.
•
Air bottles: Terminate with air cock or needle valve in a convenient position.
•
Automatic air vents: Terminate over a suitable gully or drain line in a visible location.
675
INSTALLATION OF EXPANSION COMPENSATORS
•
Location: Submit proposals.
•
Anchors and guides: Locate to contain movement and resist maximum imposed loads.
677
INSTALLATION OF FLEXIBLE HOSES
•
Location: Close to the source of vibration.
685
INSTALLATION OF COMBINED AIR AND DIRT SEPARATORS
•
Locations: Fit with dirt drain at lowest point for removing dirt that sinks.
690
INSTALLATION OF EXPANSION LOOPS
•
Location: Submit proposals.
•
Stress: Minimize.
695
INSTALLATION OF CONTROL COMPONENTS
•
Locations: As contract drawings.
•
Insulation: Submit details of proposed insulation method where control components are on
insulated pipelines.
•
Supports: Do not strain components.
•
Access: Adequate for operation and maintenance.
COMPLETION
910
VALVE TESTS
•
Standard: To BS EN 12266-1.
920
KEYS
•
Tee handled short shank keys: Supply for valve spindle shanks.
- Number: 5.
•
Lever pattern keys: Supply for drain cocks.
- Number: 5.
930
HOSE UNIONS
•
Spares: Supply for drain cocks.
- Number: 5.
Y12
Mechanical cleaning and chemical treatment
Y12 Mechanical cleaning and chemical treatment
To be read with Preliminaries/ General conditions.
EXECUTION
610
GENERALLY
•
Water analysis: Analyse water samples before treatment.
•
Preliminary checks: Before cleaning or chemical treatment, complete pressure tests.
•
Disposal of waste: Neutralize waste products and dispose to drain.
620
FLUSHING OF HOT AND COLD WATER SYSTEMS
•
Standard: To BS 6700.
•
Installation checks: Thoroughly inspect pipework.
•
Drainage: Provide adequate drainage, preferably direct to manhole.
630
FLUSHING OF HEATING AND CHILLED WATER SYSTEMS
•
Flushing: In accordance with BSRIA AG 1/2001.1.
•
Installation checks: Thoroughly inspect pipework.
•
Drainage: Provide adequate drainage, preferably direct to manhole.
640
PURGING GAS PIPEWORK
•
Standards: To IGE/UP/1 and IGE/UP/1A.
650
WATER TREATMENT FOR HOT AND COLD WATER SYSTEMS
•
Standard: To BS 6700.
•
Samples for analysis: Provide after flushing.
660
WATER TREATMENT FOR HEATING SYSTEMS
•
Treatment: In accordance with BSRIA AG 2/93.
•
Chemicals:
- Corrosion inhibitors: Submit proposals.
- pH control: Submit proposals.
- Scale inhibitors: Submit proposals.
670
WATER TREATMENT FOR CHILLED WATER SYSTEMS
•
Treatment: In accordance with BSRIA AG 2/93.
•
Chemicals:
- Corrosion inhibitors: Submit proposals.
- pH control: Submit proposals.
- Scale inhibitors: Submit proposals.
COMPLETION
910
WATER QUALITY TESTS
•
Standard: To BS 6700.
•
Samples: Submit samples for bacteriological analysis.
•
Water temperature: Record the temperature of the water at each sampling point, at the
time of taking the sample.
•
Test results: Submit.
Y20
Pumps
Y20 Pumps
To be read with Preliminaries/ General conditions
PRODUCTS
310
PUMP SELECTION
•
General: Select pump at or near the most efficient part of the performance curve for
required duty.
320
PUMPS GENERALLY
General safety standard: To BS EN 809.
•
Electrical safety: To BS EN 60335-2-51.
•
Dynamic balance: To BS ISO 2953.
•
Test standards: To BS EN ISO 9906 and in accordance with BS EN ISO 5198.
•
Belts and pulleys: To BS 3790.
•
Rotodynamic pumps: To BS EN 1151-1 and -2.
•
Connections:
- Flanged, copper alloy and composite: To BS EN 1092-3.
- Flanged, cast iron: To BS EN 1092-2.
- Threaded: To BS 21 or BS EN 10226-1.
330
CANNED ROTOR PUMPS FOR HOT WATER SUPPLY SYSTEMS
•
Arrangement: Single.
•
Manufacturer: see pump schedule.
- Product reference: see pump schedule.
•
Impeller: Submit proposals.
•
Housing: Submit proposals.
•
Flow rate: As Pump schedule.
•
System resistance: As Pump schedule.
•
Electrical supply: Single phase .
•
Speed control: Variable.
•
Accessories: Matching flanges.
•
Connections: see pump schedule.
420
PRESSURE BOOSTER SETS Tank Room
•
Manufacturer: Submit proposals.
- Product reference: Submit proposals.
•
Flow rate: Submit proposals.
•
Maximum draw: Submit proposals.
•
Working head: Submit proposals.
•
Electrical supply type: Three phase.
•
Operation: Duty and standby.
•
Pumps:
- Type: Submit proposals.
- Number: Submit proposals.
•
Control panel mounting: Submit proposals.
•
Accessories: Submit proposals.
EXECUTION
610
INSTALLATION OF PUMPS GENERALLY
•
Pipeline connections: Arrange to prevent transmission of pipeline forces to pump casing.
•
Pressure gauge tappings: Provide in flow and return pipeline connections and in common
suction and delivery pipeline.
•
Brackets: Support pipeline mounted pumps on purpose made brackets lined with vibration
absorbent material.
•
Alignment: Align and balance to minimize vibration.
•
Belt tension: Correctly tension drive belts.
•
Access: Provide adequate space for service and maintenance.
•
Identification plate: Engrave showing
- manufacturer's name and address;
- serial number;
- duty and maximum head;
- speed; and
- electrical loading.
COMPLETION
920
COMMISSIONING
•
In-line pumps: Change impeller if necessary.
•
Belt driven pumps: Change belt and pulley if necessary.
•
Test certificates and performance curves: Submit.
Y24
Trace heating tapes
Y24 Trace heating tapes
Refer to section Preliminaries/ General conditions
PRODUCTS
330
TRACE HEATING TAPE FOR PIPELINES generally where specified or in areas subject to
freezing.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Application: Frost protection.
•
Pipe material: Submit proposals.
•
Tape: Contractor's choice.
•
Electrical voltage: Contractor's choice.
•
Accessories: Submit proposals.
EXECUTION
620
INSTALLING ELECTRIC SURFACE HEATING ON METAL SURFACES
•
Installation: In accordance with BS 6351-3.
Y30
Mechanical thermal insulation
Y30 Mechanical thermal insulation
To be read with Preliminaries/ General conditions.
GENERAL
110
INSULATION TO CONTROL HEAT LOSS FOR HOT WATER PIPELINES Generally
•
Standard: To BS 5422, section 8.
•
Insulation materials: Mineral fibre pipe section, thermal conductivity 0.038 W/m·K .
•
Insulation thickness to BS 5422 (minimum): Copper and steel pipelines, low emissivity,
table 17.
- Temperature of contents: 60°C.
•
Protection: Sheet aluminium casing in plantroom, foil faced within roof space and pipe
boxes.
•
Accessories to be insulated: Insulation for valves and flanges and Insulation at load
bearing pipeline supports.
120
INSULATION TO CONTROL CONDENSATION FOR COLD WATER PIPELINES Generall
y
•
Standard: To BS 5422, section 7.
•
Insulation materials: Mineral fibre pipe section, thermal conductivity 0.034 W/m·K .
•
Insulation thickness to BS 5422 (minimum): Copper pipelines, low emissivity, table 9 .
- Temperature of contents: 10°C.
•
Vapour barrier: Required.
•
Protection: Sheet aluminium casing in plantroom, foil faced within roof space and pipe
boxes.
•
Accessories to be insulated: Insulation for valves and flanges and Insulation at load
bearing pipeline supports.
130
INSULATION TO CONTROL HEAT LOSS FOR LOW TEMPERATURE HOT WATER
HEATING PIPELINES Generally
•
Standard: To BS 5422, section 8.
•
Insulation materials: Mineral fibre pipe section, thermal conductivity 0.040 W/m·K .
•
Insulation thickness to BS 5422 (minimum): Copper and steel pipes, low emissivity, table
15.
- Temperature of contents: 75°C.
•
Protection: Sheet aluminium casing in plantroom, foil faced within roof space and pipe
boxes.
•
Accessories to be insulated: Insulation for valves and flanges and Insulation at load
bearing pipeline supports.
140
INSULATION TO CONTROL CONDENSATION FOR CHILLED WATER PIPELINES Gene
rally
•
Standard: To BS 5422, section 7.
•
Insulation materials: Mineral fibre pipe section, thermal conductivity 0.033 W/m·K .
•
Insulation thickness to BS 5422 (minimum): Steel pipelines, low emissivity, table 8 .
- Temperature of contents: 5°C.
•
Vapour barrier: Required.
•
Protection: Sheet aluminium casing in plantroom, foil faced within roof space and pipe
boxes.
•
Accessories to be insulated: Insulation for valves and flanges and Insulation at load
bearing pipeline supports.
145
INSULATION TO CONTROL HEAT GAIN FOR CHILLED WATER PIPELINES Generally
•
Standard: To BS 5422, section 7.
•
Insulation materials: Mineral fibre pipe section, thermal conductivity 0.033 W/m·K .
•
Insulation thickness to BS 5422 (minimum): Low emissivity, table 10 .
- Temperature of contents: 5°C.
•
Vapour barrier: Required.
•
Protection: Sheet aluminium casing in plantroom, foil faced within roof space and pipe
boxes.
•
Accessories to be insulated: Insulation for valves and flanges and Insulation at load
bearing pipeline supports.
150
INSULATION TO PROTECT AGAINST FREEZING FOR PIPELINES In unheated and
external areas
•
Standard: To BS 5422, section 11.
•
Insulation materials: Mineral fibre pipe section, thermal conductivity 0.033 W/m·K .
•
Insulation thickness to BS 5422 (minimum): Selected domestic cold water systems (8 hour
period), table 31 .
- Specified conditions: 1.
•
Protection: Sheet aluminium casing in plantroom, foil faced within roof space and pipe
boxes.
•
Accessories to be insulated: Insulation for valves and flanges and Insulation at load
bearing pipeline supports.
160
INSULATION FOR CONDENSATION CONTROL ON DUCTWORK CARRYING CHILLED
AIR Generally
•
Standard: To BS 5422, section 8.
•
Insulation materials: Mineral fibre slabs, thermal conductivity 0.034 W/m·K at 10°C.
•
Insulation thickness to BS 5422 (minimum): Table 12.
- Minimum air temperature inside duct: 10°C.
- Emissivity: Medium.
•
Vapour barrier: Required.
•
Protection: foil faced aluminium wrap.
•
Accessories to be insulated: dampers.
165
INSULATION TO CONTROL HEAT TRANSFER FOR CHILLED AND DUAL PURPOSE
DUCTWORK
•
Standard: To BS 5422, section 8.
•
Insulation materials: As Mechanical thermal insulation schedule.
•
Insulation thickness to BS 5422 (minimum): Table 14.
- Emissivity: High.
•
Protection: submit proposals.
•
Accessories to be insulated: valves.
170
INSULATION TO CONTROL HEAT LOSS FOR DUCTWORK CARRYING WARM AIR Ge
nerally
•
Standard: To BS 5422, section 8.
•
Insulation materials: Mineral fibre slabs, thermal conductivity 0.035 W/m·K.
•
Insulation thickness to BS 5422 (minimum): Table 13.
- Emissivity: Medium.
•
Protection: foil faced aluminium wrap.
•
Accessories to be insulated: dampers.
185
INSULATION TO CONTROL CONDENSATION FOR WATER STORAGE TANKS In tank
room
•
Standard: To BS 5422, clause 7.
•
Insulation materials: tank manufacturers standard.
•
Insulation thickness to BS 5422 (minimum): manufacturers standard.
- Temperature of contents: 10°C.
•
Protection: manufacturers standard.
•
Accessories to be insulated: Cover plates and Removable access covers.
PRODUCTS
330
MINERAL FIBRE PIPE SECTION INSULATION GENERALLY
•
Standard: To BS 3958-4.
•
Manufacturer: Contractor's choice .
- Product reference: Contractor's choice.
•
Recycled content: Submit porposals.
•
Finish: Aluminium foil faced .
340
MINERAL FIBRE SLABS INSULATION GENERALLY
•
Standard: To BS 3958-5.
•
Manufacturer: Contractor's choice .
- Product reference: Contractor's choice.
•
Form: Rigid slabs.
•
Recycled content: Submit porposals.
•
Finish: Aluminium foil faced.
360
PHENOLIC FOAM INSULATION GENERALLY
•
Standard: To BS EN 13166.
•
Manufacturer: Contractor's choice .
- Product reference: Contractor's choice.
•
Form: Pipe section.
•
Finish: Aluminium .
380
VAPOUR BARRIER PERMEANCE
•
Standard: To BS 5422, clause 5.6.
420
SELF ADHESIVE CLADDING AND JACKETING GENERALLY
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Finish: Manufacturer's standard.
425
SHEET ALUMINIUM CASING PROTECTION within plantroom
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Finish: Manufacturer's standard.
480
INSULATION FOR VALVES AND FLANGES generally
•
Insulation materials: As Mechanical thermal insulation schedule.
- Finish: Submit proposals.
- Form: Submit proposals.
495
INSULATION AT LOADBEARING PIPELINE SUPPORTS
•
Hot pipelines up to 120°C: 300 mm length of high density phenolic foam.
•
Hot pipelines above120°C: 300 mm length of calcium silicate.
•
Cold pipelines: 300 mm length of high density phenolic foam.
EXECUTION
610
INSTALLATION GENERALLY
•
Standard: In accordance wtih BS 5790.
•
Timing: Insulate after installed system has been fully tested and joints proved sound.
•
Insulation: Do not enclose adjacent units together.
•
Clearance: Maintain between pipes.
•
Finish: Neatly finish joints, corners, edges and overlaps.
625
INSTALLATION OF FOIL FACED MINERAL FIBRE INSULATION ON PIPELINES
•
Joints: Close butt, seal with 50 mm wide class O tape on both longitudinal and
circumferential joints.
•
At fittings: Mitre. Secure with tape.
•
Vapour seal: Tape exposed insulation membrane. Seal vapour barrier at pipe support with
class O tape.
640
INSTALLATION OF PHENOLIC FOAM INSULATION ON PIPELINES
•
Joints: Close butt, seal with 50 mm wide class '0' tape on both longitudinal and
circumferential joints.
•
At fittings: Mitre. Secure with tape.
•
Vapour seal: Tape exposed insulation membrane. Seal vapour barrier at pipe support with
class '0' tape.
660
INSTALLATION OF FOIL FACED MINERAL FIBRE INSULATION ON DUCTWORK
•
Fixing to underside of ducting: Self adhesive stick pins. Further support with 0.7-1.0 x 50
mm mesh galvanized wire netting.
•
Joints, pin penetrations, cut outs for test holes and supports: Seal with 100 mm wide class
'0' foil tape.
665
INSTALLATION OF FOIL FACED MINERAL FIBRE LAMELLA INSULATION ON
DUCTWORK
•
Fixing to underside of ducting: Self adhesive stick pins.
•
Joints, pin penetrations, cut outs for test holes and supports: Seal using 100 mm wide
class 'O' foil tape.
715
INSTALLATION OF SELF ADHESIVE CLADDING AND JACKETING
•
Application: Cover insulation with self adhesive cladding and jacketing with 50 mm
overlaps.
720
INSTALLATION OF SHEET ALUMINIUM PROTECTION
•
Application: Form sheet to fit circumference of insulation with 50 mm longitudinal and
circumferential overlaps. Secure overlaps with self tapping screws or rivets. Seal joints with
grey sealant.
•
Expansion: Make provision.
740
INSTALLATION AT VALVES AND FLANGES
•
Application: Do not obstruct removal of nuts and bolts, or operation of valves.
750
INSTALLATION AT LOADBEARING PIPELINES SUPPORTS
•
Application: Close butt to insulation.
•
Joints: Seal with 100 mm wide class 'O' foil tape.
•
Sleeve: Provide sheet metal protection sleeve.
755
INSTALLATION AT NON-LOADBEARING PIPELINES SUPPORTS
•
Insulation: Carry through pipe support.
770
INSULATION CARRIED THROUGH DUCTWORK SUPPORTS
•
High density phenolic foam: Close butt to insulation.
•
Sleeve: Provide sheet metal protective sleeve.
800
INSTALLING VAPOUR BARRIERS
•
Integrity: Maintain throughout.
Y32
Mechanical plant and equipment identification
Y32 Mechanical plant and equipment identification
To be read with Preliminaries/ General conditions.
PRODUCTS
310
PLANT AND EQUIPMENT IDENTIFICATION LABELS
•
Standard: To BS 1710.
•
Type: Metal plates.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Information: Purpose and reference number.
320
VALVE IDENTIFICATION LABELS
•
Standard: To BS 1710.
•
Type: Metal plates.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Information: Purpose and reference number.
•
Colours: Basic and safety colour identification of associated system.
330
VALVE CHARTS AND SCHEMATICS
•
Type: Plastic encapsulated.
EXECUTION
610
IDENTIFYING PIPEWORK
•
Standards: To BS 1710.
•
Identification type: Adhesive colour bands and Painting .
•
Application of basic identification colour: Coloured bands as BS 1710 clause 3.3 .
•
Safety colour identification: On or next to the colour bands.
•
Information:
- Chemical symbol for gases;
- Colour bands as BS 1710 appendix D; and
- Name of contents in full.
•
Direction of flow: Indication arrow and the word FLOW or the letter F and Indication arrow
and the word RETURN or the letter R.
620
IDENTIFYING DUCTWORK
•
Standard: To HVCA DW/144 appendix B.
•
Identification type: Self-adhesive plastics or transfers.
•
Direction of flow: Equilateral triangle, 150 mm length of side, with one apex pointing in the
direction of flow.
•
Information: Space served by the duct and associated plant.
630
INSTALLING PLANT AND EQUIPMENT IDENTIFICATION
•
Fixing: Fix with adhesive to equipment .
•
Location: On equipment.
640
INSTALLING VALVE IDENTIFICATION
•
Fixing: Secure with metal chain.
650
INSTALLING VALVE CHARTS AND SCHEMATICS
•
Fixing: Plug and screw to wall.
•
Location: Boiler house .
Y35
Flues and chimneys
Y35 Flues and chimneys
To be read with Preliminaries/ General conditions
PRODUCTS
310
METAL FLUES AND CHIMNEYS DHW boilers.
•
Standard: To BS 4076 or BS EN 1856-1.
•
Manufacturer: Contractor's choice.
- Product reference: Submit proposals.
•
Construction: Submit proposals.
•
Insulation: Required.
•
Material and finish: Submit proposals.
-
Colour: Self finish .
•
Fittings: Submit proposals .
EXECUTION
610
INSTALLING FLUES AND CHIMNEYS
•
Joints and bends: Minimize number.
•
Slope (maximum): 30° from the vertical.
•
Joints: Install with sockets uppermost, fully supported and fixed securely with brackets
supplied for the purpose. Do not locate joints within the depth of floors.
•
Seals: Seal joints to provide a gas-tight installation.
•
Expansion and contraction: Accommodate thermal movement.
•
Fire safety: Locate a safe distance from combustible materials.
•
Roof junction: Weatherproof. Fit terminal and flashings, collars, and the like.
COMPLETION
910
TESTING FLUES AND CHIMNEYS
•
Standard: To BS EN 1859.
•
Results: Submit.
920
ANALYSIS OF FLUE GASES
•
Results: Submit.
Y40
Mechanical engineering services control and
management systems
Y40 Mechanical engineering services control and management
systems
To be read with Preliminaries/ General conditions.
GENERAL
110
MECHANICAL ENGINEERING SERVICES SYSTEMS CENTRAL CONTROL AND
MONITORING SYSTEM Generally
•
Description: This Phase of the building is to be controlled via its own BMS system which at
a later date is to be connected to the wider system governing the whole building. A
seperate control point specification will be produced which overrides this section .
•
Link to building monitoring and management system: As section Y41.
•
Systems to be controlled:
- Water supply systems:
- Cold water, as section S10;
- Pumped water, as section S10; and
- Instantaneous hot water, as section S10.
- Fuel supply systems: Natural gas supply system, as section S32 .
- Steam and condensate systems: Not applicable.
- Heating systems: Low temperature hot water, as section T10.
- Cooling systems Variable refrigerant flow system, as section T41 and Chilled water
system, as section T50.
- Ventilation systems:
- Mechanical supply, as section U10;
- Mechanical extract, as section U10;
- Toilet extract, as section U10; and
- Kitchen extract, as section U10.
- Air conditioning systems:
- Centralized all-air, as section U30;
- Fan coil, as section U30;
- Local, as section U60; and
- Local underfloor, as section U60 .
•
System control strategies:
- Water supply system;
- Heating system;
- Cooling system;
- Mechanical ventilation system;
- Mechanical extract system;
- Constant volume air conditioning system; and
- Fan coil unit air conditioning system .
•
Data logging:
- Actuator;
- Motorized valve;
- Sensor; and
- Thermostat.
•
Monitoring:
- Cooling plant;
- Fan;
- Heating plant; and
- Pump.
•
Equipment:
- Control panel;
- Actuators;
- Alarms; and
- Motorized valves .
- Sensors:
- Flow in duct;
- Air temperature; and
- Water temperature.
120
LOCAL WATER SUPPLY SYSTEMS CONTROLS Toilet Blocks
•
Systems to be controlled:
- Cold water, as section S10;
- Pumped water, as section S10;
- Instantaneous hot water, as section S10; and
- Direct hot water storage, as section S10 .
•
Description: Each toilet block is fitted with water supply shut off valves linked to the lighting
circuit PIR sensors to ensure water is supplied to the block only when occupied, this will
aid water reduction and reduce the risk of leaks and damage from taps which have been
left on..
•
Control strategies: Water supply system.
•
Data logging:
- Actuator;
- Motorized valve; and
- Sensor.
•
Monitoring: Submit design and cost proposals.
•
Equipment: Submit design and cost proposals .
- Sensors: Submit design and cost proposals .
130
LOCAL HEATING SYSTEMS CONTROLS Generally
•
Systems to be controlled: Low temperature hot water, as section T10.
•
Description: As existing sysetm.
•
Control strategies: Heating system.
•
Data logging:
- Actuator;
- Motorized valve;
- Sensor; and
- Thermostat.
•
Monitoring: Heating plant and Pump.
•
Equipment:
- Control panel;
- Actuators; and
- Motorized valves .
- Sensors: Water temperature.
140
LOCAL COOLING SYSTEMS CONTROLS Generally
•
Systems to be controlled: Variable refrigerant flow system, as section T41 .
•
Description: manufacturers controls to be used and linked to BMS .
•
Control strategies: Cooling system.
•
Data logging: Thermostat.
•
Monitoring: Cooling plant.
•
Equipment: Control panel.
- Sensors: Submit design and cost proposals .
160
LOCAL AIR CONDITIONING SYSTEMS CONTROLS Offices
•
Systems to be controlled: Fan coil, as section U30.
•
Description: Local controls per fan coil and all linked to BMS .
•
Control strategies: Fan coil unit air conditioning system .
•
Data logging:
- Actuator;
- Motorized valve;
- Sensor; and
- Thermostat.
•
Monitoring:
- Cooling plant;
- Fan; and
- Heating plant.
•
Equipment: Control panel and Actuators.
- Sensors: Air temperature.
170
ELECTRICAL CONNECTIONS Generally to all plant
•
Power supplies to plant and equipment: as electrical Engineers design .
175
ELECTRICAL CONNECTIONS BETWEEN CONTROL DEVICES AND PLANT AND
EQUIPMENT Generally
•
Equipment interconnectivity: Wired.
•
Electrical connection cable: As Specialist's recommendations.
- Containment: as electrical Engineers designs.
•
Rewireable installations: as electrical Engineers design.
•
Concealed installations: as electrical Engineers design.
SYSTEM PERFORMANCE
210
DESIGN
•
Design: Complete the design of the mechanical engineering services controls and
monitoring system.
•
Proposals: Submit mode of operation statements, point schedules, control logic diagrams,
network topology schematics, panel diagrams and fascia drawings, method statements for
testing and commissioning, method statements for witness testing and graphics.
215
WATER SUPPLY SYSTEMS CONTROL STRATEGY LOCAL WATER SUPPLY SYSTEM
CONTROLS
•
Start and stop control: Submit proposals.
•
Pressurization control strategies: Submit proposals.
•
Distribution control strategies: Submit proposals.
•
Pumps control strategies: Submit proposals.
•
Control points schedules: General .
220
HEATING SYSTEMS CONTROL STRATEGY LOCAL HEATING SYSTEM CONTROLS
Primary boiler plant not to be altered under this phase of works other than to provide for a
demand signal
•
Start and stop control:
- Boost fixed time;
- Domestic hot water demand;
- Low inside temperature interlock for building fabric and contents protection;
- Low temperature interlock signals for plant protection;
- Night cooling;
- Optimum start heating ;
- Optimum stop heating ;
- Pump overrun; and
- Time control.
•
Water heating plant control strategies: Modular boilers.
•
Pumps: Duplicate primary pumps (run and standby), as section Y20 .
- Primary pumps control strategies: Constant speed.
- Secondary pumps control strategies: Constant speed.
•
Pressurization system control strategies: Not required.
•
Outlet control strategies: Heating secondary circuits.
•
Control points schedules: Heating plant.
225
COOLING SYSTEMS CONTROL STRATEGY LOCAL COOLING SYSTEM CONTROLS
•
Start and stop control:
- Night cooling;
- Optimum start cooling ;
- Optimum stop cooling ;
- Pump overrun; and
- Time control.
•
Pressurization plant control strategies: Submit proposals.
•
Distribution control strategies: Submit proposals.
•
Pumps control strategies: Submit proposals.
•
Water chillers control strategies: Packaged air cooled water chiller with multi-stage
compressor.
•
Cooling towers control strategies: Submit proposals.
•
Control points schedules:
- Cooling plant;
- Pressurization plant; and
- Pump.
240
MECHANICAL VENTILATION SYSTEMS CONTROL STRATEGY CENTRAL CONTROL
SYSTEM
•
Start and stop control:
- Fan overrun;
- Low inside temperature interlock for building fabric and contents ;
- Low temperature interlock signals for plant protection;
- Night cooling;
- Optimum start heating ;
- Optimum stop heating ; and
- Time control.
•
Damper control strategies: Mixing.
•
Heating coils control strategies: Low temperature hot water pre-heat coil and frost
protection and Low temperature hot water heating coil .
•
Heat recovery devices control strategies: Fixed plate heat exchanger.
•
Supply fan control strategies: as existing.
•
Extract fan control strategies: as existing.
•
Terminal units control strategies: Submit proposals.
•
Filter control strategies: Submit proposals.
•
Supply air temperature control strategies: Zone air temperature control.
•
Control points schedules:
- Air temperature ;
- Fan; and
- Heating coil.
242
MECHANICAL EXTRACT SYSTEMS CONTROL STRATEGY LOCAL VENTILATION
SYSTEM CONTROLS
•
Start and stop control: Time control.
•
Extract fan control strategies: Submit proposals.
•
Control points schedules: Air temperature and Fan.
245
CONSTANT VOLUME AIR CONDITIONING SYSTEM CONTROL STRATEGY CENTRAL
CONTROL SYSTEM
•
Start and stop control:
- Low inside temperature interlock for building fabric and contents protection;
- Low temperature interlock signals for plant protection;
- Night cooling;
- Optimum start cooling ;
- Optimum stop cooling ;
- Optimum start heating ;
- Optimum stop heating ; and
- Time control.
•
Damper control strategies: Submit proposals.
•
Heating coils control strategies: Submit proposals.
•
Heat recovery devices control strategies: Fixed plate heat exchanger.
•
Cooling coil control strategies: Chilled water .
•
Dehumidification control strategies: Submit proposals.
•
Supply fan control strategies: Submit proposals.
•
Humidifier control strategies: Submit proposals.
•
Extract fan control strategies: Submit proposals.
•
Terminal units control strategies: Submit proposals.
•
Filter control strategies: Submit proposals.
•
Supply air temperature control strategies: Zone air temperature control.
•
Control points schedules: General .
250
FAN COIL UNIT AIR CONDITIONING SYSTEM CONTROL STRATEGY LOCAL AIR
CONDITIONING SYSTEM CONTROLS
•
Start and stop control:
- Optimum start cooling;
- Optimum stop cooling;
- Optimum start heating;
- Optimum stop heating; and
- Time control.
•
Damper control strategies: Submit proposals.
•
Heating coils control strategies: Low temperature hot water heating coil .
•
Heat recovery devices control strategies: n/a.
•
Cooling coil control strategies: Chilled water .
•
Dehumidification control strategies: n/a.
•
Supply fan control strategies: Submit proposals.
•
Humidifier control strategies: n/a.
•
Extract fan control strategies: n/a.
•
Fan coil units control strategies: Air side control.
•
Filter control strategies: Submit proposals.
•
Supply air temperature control strategies: Zone air temperature control.
•
Control points schedules: General .
254
SMOKE AND HEAT CONTROL SYSTEM, PLANT SHUTDOWN CONTROL STRATEGY G
eneral
•
Operation: On receipt of fire alarm signal control all plant to shutdown.
•
Fireman's override switch: Operate relative fan and open relative damper when switch is
positioned to Submit proposals
•
Variable speed fans: Not applicable.
270
BOOST FIXED TIME winter operation
•
Boost operation signal: Set from calendar in winter season and preset time on time clock.
- Boost period and time: Submit proposals.
- Termination: When zone reaches heating set point temperature.
272
DOMESTIC HOT WATER DEMAND ACV controls
•
Demand for hot water: Start valves, pumps and heat generator plant when signal received.
- Demand signal: Temperature below storage set point.
276
HAND OFF AUTO SWITCH Main AHU
•
Operation:
- Hand: Plant operates as normal regardless of sensors and controllers but satisfying
safety features and interlocks.
- Off: Plant prevented from operating regardless of sensors and controllers. Position
plant for shutdown.
- Auto: Plant dependent on sensors and controllers.
278
LOW INSIDE AIR TEMPERATURE INTERLOCK FOR BUILDING FABRIC AND
CONTENTS PROTECTION internal zone temp sensors
•
Low inside air temperature signal: Start all heating plant serving zone registering condition.
- Activation set point: 10°C.
- Termination set point: 14°C .
•
Priority: Independent of low outside temperature and low primary heating return water
conditions.
280
LOW TEMPERATURE INTERLOCK SIGNALS FOR PLANT PROTECTION Frost
protection for plant
•
Low outside air temperature condition: When activated start duty primary and secondary
circuit heating and cooling pumps. Open primary and secondary heating circuit valves to
allow water to circulate through circuits unless plant is in operating mode.
- Activation set point: Below 3°C.
- Termination set point: Activation set point plus 2°C.
•
Low primary heating return water temperature condition: When activated start heat source
and primary and secondary heating pumps if not already enabled.
- Activation set point: Below 8°C.
- Termination set point: 55°C where non-condensing boilers are used .
282
NIGHT COOLING to office spaces
•
Type: Mechanical.
•
Activation: Submit proposals.
- Period of operation: Submit proposals.
- Availability: Throughout entire non-occupied period.
•
Wind speed limit: Shut down passive night cooling when wind speed exceeds: Submit
proposals.
•
Rain sensor: Shut inlet and outlet vents when rain is detected.
284
OPTIMUM START COOLING office areas
•
Optimum start time: Use a self-adaptive control algorithm to calculate when to start plant
outside of normal operation by measuring outside and internal zone air temperature and
using thermal response of structure and plant. Operate plant at maximum output. Take
account of day of week and holidays. Following learning period, achieve temperature set
point within +/- 15 minutes of start of occupancy.
- Zone cooling set point: 24°C.
- Maximum precool time: 2h.
•
Air handling plant start: Use separate control for each air handling plant. Start air handling
plant and cooling system.
286
OPTIMUM STOP COOLING office areas
•
Optimum stop time: Use a self-adaptive algorithm to calculate the earliest time prior to end
of occupancy when plant can be shutdown. Disable normal plant operation signal. Take
account of day of week and holidays. Following learning period, achieve maximum
temperature within +/- 15 minutes of end of occupancy.
- Maximum acceptable temperature during occupied period: 26°C.
- Maximum period between stop and end of occupied period: 2 h.
288
OPTIMUM START HEATING office areas
•
Optimum start time: Use a self-adaptive control algorithm to calculate when to start plant
outside of normal operation by measuring outside and internal zone air temperature and
using thermal response of structure and plant. Operate plant at maximum output. Take
account of day of week and holidays. Following learning period, achieve temperature set
point within +/- 15 minutes of start of occupancy.
- Zone heating set point: 19°C.
- Maximum preheat time: 4 h.
•
Air handling plant start: Use separate control for each air handling plant. Start air handling
plant and boiler heating system.
290
OPTIMUM STOP HEATING office areas
•
Optimum stop time: Use a self-adaptive algorithm to calculate the earliest time prior to end
of occupancy when plant can be shutdown. Disable normal plant operation signal. Take
account of day of week and holidays. Following learning period, achieve minimum
temperature within +/- 15 minutes of end of occupancy.
- Minimum acceptable temperature during occupied period: 18°C.
- Maximum period between stop and end of occupied period: 2 h.
294
TIME CONTROL generally
•
Time clock: Provide clock and calendar programmed with periods of normal operation.
Automatically change between GMT and British summer time and allow for leap years.
•
Extension of plant operation: Allow manual override, for normal operation, activated by
push button switch.
- Period: 1 hr.
•
Winter mode: Between 1 October and 30 April .
- Outside temperature: Above 17°C for at least 30 minutes.
PRODUCTS
324
DOMESTIC HOT WATER NON-STORAGE CALORIFIER CONTROL STRATEGY ACV
units in plantroom
•
Medium: Water, using three port diverting valve and isolating valve .
•
Non-operation: Open bypass port of control valve, close isolating valve and disable
secondary pump.
•
Operation: When demand is signalled, operate secondary pump, open isolating valve and
modulate control valve to maintain secondary flow temperature at set point.
- Set point: 60°C.
•
Alarm: Raise an alarm when domestic hot water secondary flow water temperature falls
below specified temperature during operating period.
- Specified temperature: 50°C.
•
High limit thermostat: When calorifier water temperature is above the high temperature set
point, close the control valve and shut isolating valve. Start secondary pump overrun.
Raise alarm.
- Set point: 90°C.
- Overrun period: 5 minutes.
•
Secondary circuit pump failure: Set control valve to bypass and shut isolating valve.
•
Stratification pump: part of ACV units.
329
VARIABLE SPEED PUMPS CONTROL STRATEGY DHW circulation
•
Function: primary.
•
Plant shut down: Turn pumps off and fully close valves serving loads closed.
- Long shutdown period: Run pumps for 5 minutes on a daily basis when shut down is
longer than 2 days.
•
Operation: Run pumps on receipt of signal. Modulate pumps to obtain design differential
set point between flow and return circuits, across the load at furthest point or according to
he lowest negative deviation from the differential set point.
- Differential set point: Submit proposals.
•
Shared duty: Operate pumps together at same speed. If one pump fails increase the speed
of the other pump to meet the load and raise an alarm.
332
PACKAGED AIR COOLED WATER CHILLER CONTROL STRATEGY existing chillers
•
Equipment to be controlled: Packaged air cooled chiller and Duplicate chilled water pumps
(run and standby).
- Pressurization system: Submit proposals.
•
Chilled water flow: Start chilled water circulation pumps and prove flow before enabling
chiller.
- Pump failure: If flow is not proved within 30 s of pump being started, enable standby
pump. If flow is still not proved after 30 s of pump being started, disable chiller including
condenser fans.
•
Refrigerant solenoid valve: Open following start signal when the chilled water entering
temperature is above the set point.
- Chilled water entering temperature set point: 7°C.
•
Control of compressor stages: Submit proposals.
- Compressor start delay: 30 minutes.
- Compressor crank case oil heater: Controlled by chiller controls.
•
Condenser fans: Use fans to maintain a constant pressure and temperature of refrigerant
gas entering condenser.
- Control Submit proposals.
•
Chilled water low limit condition: Close refrigerant valve when chilled water temperature
falls below low limit set point. Open refrigerant valve when chilled water low limit end is
achieved.
- Chilled water low limit set point: 2°C.
- Chilled water low limit end: 4°C.
•
Chiller off condition: Disable chiller following a night cooling signal or optimum start heating
signal.
345
FULL OUTSIDE AIR DAMPER CONTROL STRATEGY AHU supply
•
Dampers: Inlet and exhaust air.
•
Control: Open/closed.
•
Shutdown period: Close dampers.
•
Operation: Open dampers on a plant operation signal. When fully open make damper end
switch.
- Damper end switches: Hardwire to respective fan starter.
•
Fan failure: Close dampers.
351
LOW TEMPERATURE HOT WATER PRE-HEAT COIL AND FROST PROTECTION
STRATEGY AHU's
•
Equipment to be controlled: Low temperature hot water (LTHW) pre-heat coil and three
port valve.
- Freeze protection thermostat: Submit proposals.
•
Operation:
- Normal: Modulate three port valve under PI control to maintain off-coil temperature set
point. Prove fan operation.
Off-coil temperature set point: 8°C.
- Boost, optimum start heating, low return temperature and low outside temperature:
Fully open three port valve.
- Shut down or fan failure: Three port valve on full bypass.
•
Frost protection: When thermostat detects temperature below set point, stop supply and
extract fans and initiate alarm. Prevent restart until temperature has risen and the
thermostat has been reset.
- Thermostat set point: 3°C.
353
LOW TEMPERATURE HOT WATER HEATING COIL CONTROL STRATEGY AHU's
•
Equipment to be controlled: Low temperature hot water (LTHW) heating coil and three port
valve.
•
Normal operation: Prove fan operation and, after heating from heat recovery has been
utilised, modulate three port valve under PI control to maintain required condition.
- Required condition: Zone heating temperature set point of 19°C .
•
Low zone temperature condition: Prove fan operation and modulate three port valve under
PI control to maintain zone heating temperature set point.
•
Boost, optimum start heating, low return temperature and low outside temperature: Prove
fan operation and fully open three port valve.
•
Shut down, optimum cooling start or night cooling mode: Three port valve on full bypass.
354
FIXED PLATE HEAT EXCHANGER CONTROL STRATEGY AHU's
•
Equipment to be controlled: Fixed plate heat exchanger, face and bypass dampers.
•
Operation: Enable face and bypass dampers when the supply fan is operating except for
night cooling and fan overrun operation. Open the face damper on shut down or during
night cooling.
•
Dampers: Use a PI signal to control the dampers to provide the required condition.
- Required condition: Zone air temperature set point of 19/22°C .
•
Differential pressure limit: If the differential pressure measured by a differential pressure
switch across the heat exchanger exceeds a set point, initiate an alarm.
- Set point: 600 Pa.
•
Sequence: During plant operating periods sequence the face and bypass dampers first to
provide supply temperature set point control. Use other plant for temperature control when
the face damper is either fully opened or closed.
359
CHILLED WATER COOLING COIL CONTROL STRATEGY AHU's
•
Equipment to be controlled: Chilled water cooling coil and three port mixing valve.
•
Optimum cooling start: Fully open three port valve when fan operation is proved.
•
Normal: Prove fan operation. Modulate three port valve under PI control when free cooling
has been used and when signal requires.
Signal: Zone air temperature is above the set point of 22°C .
•
Cooling plant shut down: Position three port valve on full bypass.
•
Low outside air temperature during shut down: Fully open three port valve.
•
Low outside air temperature during operation: Position three port valve on full bypass.
•
Boost, optimum start heating and night cooling: Position three port valve on full bypass.
366
CONSTANT VOLUME SUPPLY FAN CONTROL STRATEGY AHU's
•
Equipment to be controlled: Constant volume supply fan, hand/off/auto switch hardwired to
motor and to extract fan fail.
•
Additional start and stop control:
- Associated extract fan failure;
- Freeze thermostat trip from pre-heater; and
- Smoke detection device in return air ductwork .
•
Normal operation: Enable fan and start on receipt of damper open signal.
•
Fan operation: Proved when supply air pressure switch or air velocity switch is made. If
condition is not met within failure time, generate a fan failure alarm and disable the fan.
- Activate switch: Submit proposals.
- Failure time: Submit proposals.
•
Shut down: Disable fan.
375
CONSTANT VOLUME EXTRACT FAN CONTROL STRATEGY AHU's
•
Equipment to be controlled: Constant volume extract fan interlocked with associated supply
fan and hand/off/auto switch hardwired to motor.
•
Additional start and stop control:
- Associated supply fan failure;
- Freeze thermostat trip from pre-heater; and
- Smoke detection device in return air ductwork .
•
Normal operation: Enable fan and start on receipt of damper open signal.
•
Fan operation: Proved when extract air pressure switch or air velocity switch is made. If
condition is not met within failure time, generate a fan failure alarm and disable the fan.
- Activate switch: Submit proposals.
- Failure time: Submit proposals.
•
Shut down: Disable fan.
387
FAN COIL UNIT, AIR SIDE CONTROL STRATEGY Generally
•
Equipment to be controlled: Fan coil unit or group of fan coil units with fans, heating coils
and cooling coils.
- Motor speed: as fan coil schedule.
•
Start and stop control: BMS.
•
Shut down: Submit proposals.
•
Low outside temperature or low return water temperature condition: Open valves.
•
Fan overrun operation: Close cooling valve, position dampers to supply air over heating
coil.
- Heater: Submit proposals.
- Fan: Submit proposals.
•
Optimum start heating, boost or low zone temperature condition: Fully open heating
damper and close cooling valve.
- Fan: Run.
- Heater: Fully open the heating valve .
•
Optimum start cooling: Fully open cooling damper and valve and disable heating.
- Fan: Run.
•
Night cooling: Close valves and disable heating, position dampers to supply air without
passing over cooling or heating coils.
- Fan: Run.
•
Normal operation: Modulate the dampers under PI control to provide the zone heating and
cooling temperature set points. The cooling damper operates in reverse to the heating
damper.
- Heating set point: 19°C.
- Cooling set point: 22°C.
- Fan: Run.
- Heater: Open the heating valves .
388
FAN COIL UNIT, WATER SIDE CONTROL STRATEGY Generally
•
Equipment to be controlled: Fan coil unit or group of fan coil units with fans, heating coils
and cooling coils.
- Motor speed: Submit proposals.
•
Shut down: Disable unit with fan switched off and valves closed.
•
Low outside temperature or low return water temperature condition: Open valves.
•
Fan overrun operation: Close cooling valve.
- Heater: Submit proposals.
- Fan: Run fan.
•
Optimum start heating, boost or low zone temperature condition: Close cooling valve.
- Heater: Fully open heating valve .
- Fan: Run.
•
Optimum start cooling: Fully open cooling valve and disable heating.
- Fan: Run.
•
Night cooling: Close valves and disable heating.
- Fan: Run.
•
Normal operation: Modulate the heating and cooling valve positions under PI control to
provide the zone heating and cooling temperature set points.
- Heating set point: 19.
- Cooling set point: 22°C.
- Fan: Run.
390
AIR FILTER WITH PRESSURE SENSOR CONTROL STRATEGY AHU's
•
Air filter: Monitor cleanliness by measuring differential pressure across filters using
sensors.
•
Dirty filter warning signal: Submit proposals.
392
CONSTANT AIR VOLUME SYSTEM, ZONE TEMPERATURE CONTROL OF PRIMARY
SUPPLY AIR TEMPERATURE CONTROL STRATEGY Genrally
•
Shutdown: Supply air temperature control inactive.
•
Optimum start, boost or night cooling: Supply air temperature control inactive.
•
Normal operation or low zone temperature condition: Schedule the supply air temperature
linearly in relation to the common return air temperature subject to upper and lower supply
air temperature set points.
- Maximum set point: 25°C when average zone temperature is at or below 19°C .
- Minimum set point: 15°C when average zone temperature is at or above 24°C .
- Zone reheaters: Not applicable.
- Zone coolers: Not applicable.
•
Sequence: Operate heat recovery devices before air heater coil and Use mixing dampers
to provide free cooling before air cooling coil .
•
High/low temperature warning: Generate a warning signal if supply air temperature rises
above high limit or drops below low limit.
- High limit: 30°C.
- Low limit: 12°C.
393
SUPPLY AIR TEMPERATURE SET POINT, SCHEDULED TO OUTSIDE AIR
TEMPERATURE CONTROL STRATEGY genarally
•
Shutdown: Supply air temperature control inactive.
•
Optimum start heating, boost or low zone temperature condition: Set supply air
temperature set point to maximum limit.
•
Optimum start cooling or night cooling condition: Set supply air temperature set point to
minimum limit.
•
Normal operation or fan overrun condition: Schedule the supply air temperature set point
linearly in relation to the outside air temperature, subject to upper and lower supply air
temperature set points.
- Upper set point: 22°C when outside air temperature is at or below 12°C .
- Lower set point: 15°C when outside air temperature is at or above 21°C .
•
Sequence: Operate heat recovery devices before air heater coil and Use mixing dampers
to provide free cooling before air cooling coil .
•
High/low temperature warning: Generate a warning signal if supply air temperature rises
above high limit or drops below low limit.
- High limit: 30°C.
- Low limit: 12°C.
396
ZONE AIR TEMPERATURE CONTROL Genrally all spaces
•
Set point adjustment: Provide temperature setback during periods when zone is
unoccupied.
- Zone air temperature heating set point reduction: 2°C.
- Zone air temperature cooling set point increase: 3°C.
•
Sensor: Occupancy detector
•
Time delay:
- Time from detection that occupancy has ended to set point adjusting: 10 minutes.
- Time from detection that occupancy has resumed to set point adjusting: 10 minutes.
•
Start up set point adjustment: Not operative.
510
CONTROL PANEL plantroom
•
Standards: To BS 7671, BS EN 60439-1 and -3.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Assembly: Fully factory tested.
- Approval: ASTA certified.
- Evidence of certification: Required.
•
Internal separation: Form 4 to BS EN 60439-1 National Annex.
•
Voltage: contractors choice.
•
Phase: Three.
•
Enclosure:
- Standard: To BS EN 62208.
- Ingress protection to BS EN 60529: Contractor's choice.
- Material: Metal.
- Finish: Powder coated.
- Colour: Submit proposals.
- Method of fixing: Wall mounting - surface.
- Intended location: Indoor.
- Mechanical protection to BS EN 62262: submit proposals.
- Incoming cabling access: as existing.
- Outgoing cabling access: as existing.
•
Locking mechanism: Cylinder locks with a standard key type.
•
Incoming device: Switch-disconnector to BS EN 60947-3.
- Interlock: Cannot be opened except with the isolator in the off position.
- Rating: Submit proposals.
- Poles: Submit proposals.
•
Outgoing devices: Submit proposals.
•
Identification:
- Cable terminations: Label with circuit reference, with push-on plastics markers.
•
Full length internal earth bar: Required.
- Size: Submit proposals.
•
Internal busbars and wiring:
- Type: PVC insulated.
- Size (minimum): 1 mm².
•
Internal wiring: Segregate power and signal cabling. Contain within slotted trunking.
- Wiring capacity (maximum): 45% full by volume.
•
Busbars and connections: Fully shrouded.
•
Accessories:
- Indicator lamps;
- Padlock and key cabinet; and
- Submit proposals.
525
INDICATOR LAMPS
•
Lamp type: Clustered LED with bezel. Standardize lamp type.
•
Lens colour: To BS EN 60073.
•
Lamp mounting: Recessed.
•
Common lamp test facility: Required.
•
Access for lamp replacement: Externally from enclosure front.
530
PADLOCKS AND KEYS
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Locking mechanism: Contractor's choice.
•
Material: Contractor's choice.
531
PADLOCK AND KEY CABINETS
•
Type: Wall mounted metal construction.
•
Finish: Match control panel enclosure.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
540
ACTUATORS generally
•
Standard: To BS EN 60730-2-8.
•
Manufacturer: Submit proposals.
- Product reference: Submit proposals.
•
Type: Submit proposals.
•
Action: Submit proposals.
•
Operation: Submit proposals.
•
Electricity supply: Submit proposals.
•
Ancillaries: Submit proposals.
545
ALARMS at panel
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Type: Audible.
•
Display: Chronological.
•
Alarm mute: Yes.
•
Alarm data: Identity, value, source, time, date and acknowledgement status.
550
MOTORIZED VALVES generally
•
Standard: To BS EN 60730-2-8.
•
Manufacturer: Submit proposals.
- Product reference: Submit proposals.
•
Type: Submit proposals.
•
Valve authority:
- Design Submit proposals.
- Minimum: Submit proposals.
•
Material: Submit proposals.
•
Connections: Submit proposals.
•
Electricity supply: Submit proposals.
560
SENSORS, AIR QUALITY as required
•
Manufacturer: Contractor's choice .
- Product reference: Contractor's choice.
•
Type: CO2 sensor.
•
Equipment interconnectivity: Wired.
•
Mounting: Submit proposals.
•
Application: Submit proposals.
565
SENSORS, FLOW IN DUCT generally
•
Standard: To BS EN 60730-2-18.
•
Manufacturer: Submit proposals.
- Product reference: Submit proposals.
•
Type: Contractor's choice.
•
Equipment interconnectivity: Wired.
•
Application: Contractor's choice.
•
Accuracy: ±5%.
580
SENSORS, AIR TEMPERATURE generally
•
Standard: To BS EN 60730-2-9.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Application: Submit proposals.
•
Range: -10°C to 40°C.
•
Accuracy: ±0.5°C.
•
Equipment interconnectivity: Wired.
585
SENSORS, WATER TEMPERATURE generally
•
Standard: To BS EN 60730-2-9.
•
Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
•
Type: Contractor's choice.
•
Application: Submit proposals.
•
Range: Submit proposals.
•
Accuracy: ±2.0°C.
•
Equipment interconnectivity: Wired.
EXECUTION
620
INSTALLATION OF SENSORS GENERALLY
•
Standard: In accordance with Building Controls Industry Association (BCIA) Guide Control
sensor installation.
•
Screening: Screen from direct sunlight.
•
Immersion: Immerse the sensor adequately in the medium.
•
Immersion pockets: Provide for pipe sensors. Fill with thermal conductive compound.
•
Cable: Flexible. Allow sufficient spare cable to allow for removal of sensor.
•
Stratification: Install more than one sensor or an averaging sensor if necessary.
•
Positions of sensors: Submit proposals.
630
LOCATION OF ACTUATORS
•
Position: Top of valve.
640
LOCATION OF MOTORIZED VALVES
•
Spindles: Vertical.
650
LOCATION OF SENSORS, AIR QUALITY
•
Room sensors:
- Height: 1.5 m above floor.
- Away from corners and doors.
- Away from continuously occupied areas.
- In the area controlled.
•
Duct sensors:
- Locate as close as possible to the room extract point, in return air duct.
- Install vertically with head at top.
- Correctly orientate probe with air flow.
660
LOCATION OF SENSORS, FLOW
•
Differential pressure water sensors: Do not locate valves between sensing points.
•
Differential pressure air sensors: Provide adequate distance from fans, filters, bends,
fittings etc.
•
Velocity sensors: Provide adequate distance from fans, filters, bends, fittings etc.
670
LOCATION OF SENSORS, HUMIDITY
•
Room sensors:
- Height: 1.5 m above floor.
- Away from corners and doors.
- Away from heat sources and draughts.
- Away from direct solar radiation.
- Not on external walls.
- In the area controlled.
•
Duct sensors:
- Beyond the spray distance of humidifiers.
- Air velocity (maximum) at sensor: 10 m/s.
680
LOCATION OF SENSORS, PRESSURE
•
Tapping points: Do not locate in turbulent flow.
- Position: Locate an adequate distance from bends or fittings.
•
Vibration: Install on vibration free surface.
690
LOCATION OF SENSORS, TEMPERATURE
•
Room sensors:
- Height: 1.5 m above floor.
- Away from corners and doors.
- Away from heat sources and draughts.
- Away from direct solar radiation.
- Not on external walls.
- In the area controlled.
•
Pipe mounted immersion sensors:
- Immerse full length of sensor in water.
- Locate an adequate distance from bends or fittings.
•
Duct mounted immersion sensors:
- Locate full length of sensor in the centre of the air flow.
- Position downstream of supply fans.
- Shield against radiant heat transfer next to coils.
- Locate sensors in return air ducts as near as possible to the occupied space.
- Locate an adequate distance from bends or fittings.
•
Surface temperature sensors: Provide clean contact with surface and thermal conducting
compound.
•
Outside air sensors:
- Fix to north-facing wall.
- Do not locate next to extract points, above windows or under eaves.
•
Frost protection sensors: Locate downstream of the first coil.
700
INSTALLING CONTROL PANELS
•
Control gear cubicles: Arrange in modular form to facilitate future extension.
•
Clearance (minimum):
- Front access control panels: 1000 mm in front of control gear.
- Rear access control panels: 1000 mm in front of and behind control gear.
•
Fixing equipment: Fix independently of wiring installation, with zinc electroplated fasteners.
- Indoor equipment: Fix with internal lugs.
- Outdoor equipment: Fix with external lugs.
•
Extension boxes: Provide where necessary.
•
Gland plates: Nonferrous for single core electrical cables.
•
Close coupled control panels: Interconnect.
- Cable type: electrical Engineers design.
- Containment: as electrical Engineers design.
710
CABLE INSTALLATION GENERALLY
•
Standard: To BS 7671.
•
Timing: Do not start internal cabling until building enclosure provides permanently dry
conditions.
•
Cables: Install in one uninterrupted run with jointing at equipment and terminal fittings only.
•
Arrangement: Position vertically and horizontally in line with equipment served, and parallel
with building lines. Provide drip loop to prevent water entering equipment.
•
Orientation: Dress cables flat, free from twists, kinks and strain.
•
Cable pulling: Do not overstress.
- Installation method: Submit proposals.
•
Cables routes generally:
- Concealed cable runs to wall accessories: Run vertically from the accessory.
- Exposed cable runs: Submit proposals.
•
Cables from other systems: Segregate and cross at right angles.
- Distance from steam and low temperature hot water systems running parallel: 500 mm
minimum.
•
Terminations: Support cable within 150 mm of termination.
•
Balanced twisted-pair cabling:
- Maximum untwist at terminations: 12 mm.
COMPLETION
910
INSPECTION AND TESTING
•
Standard: To BS 7671.
•
Notice before commencing tests (minimum): 24 h.
•
Certificates: Submit.
- Number of copies: 2.
•
Test equipment identity: Record on test certificates.
•
Certificates of calibration: Submit for each test instrument.
•
Control panel test certificates: Submit.
- Number of copies: 2.
915
START UP AND COMMISSIONING
•
Standard: In accordance with BCIA System start up and commissioning guide.
920
SPARES
•
Spare fuses: Mount within each control panel.
- Number: 2 of each type used.
•
Spare devices: Supply.
- Number: 2 of each type used.
•
Spare lamps: Mount within control panel.
- Number: 2 of each type and colour used.
930
KEYS
•
Control panel doors: Supply.
- Number: 2 of each type used.
940
DOCUMENTATION
•
Operation and maintenance instructions: Submit.
•
Record drawings: Submit.
950
MAINTENANCE
•
Servicing and maintenance: Undertake.
- Duration: Until 12 months after Practical Completion.
Y50
Mechanical commissioning
Y50 Mechanical commissioning
To be read with Preliminaries/ General conditions.
EXECUTION
610
COMMISSIONING PROGRAMME
•
Generally: Submit before commissioning commences.
- Notice (minimum): 1 week.
•
Commissioning manager: Submit details.
615
PERFORMANCE TESTING PROGRAMME
•
Generally: Submit before performance testing commences.
- Notice (minimum): 1 week.
•
Performance testing manager: Submit details.
COMPLETION
910
COMMISSIONING OF HOT AND COLD WATER SUPPLY SYSTEMS
•
Commissioning: In accordance with BS 6700, BSRIA AG 2/89 and CIBSE Commissioning
code W.
•
Notice (minimum): 24 h.
•
Equipment: Check and adjust operation of equipment, controls and safety devices.
•
Outlets: Check operation of outlets for satisfactory rate of flow and temperature.
930
COMMISSIONING OF WATER HEATING SYSTEMS
•
Commissioning: In accordance with BSRIA AG 2/89 and CIBSE Commissioning code W.
•
Variable flow systems: In accordance with CIBSE Knowledge Services Commissioning
variable flow pipework systems.
•
Notice (minimum): 24 h.
940
COMMISSIONING OF BOILER PLANT
•
Commissioning: In accordance with CIBSE Commissioning code B.
•
Notice (minimum): 24 h.
950
COMMISSIONING OF CHILLED WATER SYSTEMS
•
Commissioning: In accordance with BSRIA AG 2/89 and CIBSE Commissioning code W.
•
Variable flow systems: In accordance with CIBSE Knowledge Services Commissioning
variable flow pipework systems.
•
Notice (minimum): 24 h.
960
COMMISSIONING OF REFRIGERATING SYSTEMS
•
Commissioning: In accordance with CIBSE Commissioning code R.
•
Notice (minimum): 24 h.
970
COMMISSIONING OF AIR DISTRIBUTION SYSTEMS
•
Commissioning: in accordance with BSRIA AG 3/89 and CIBSE Commissioning code A .
•
Notice (minimum): 24 h .
980
COMMISSIONING OF CENTRAL CONTROLS AND BUILDING MANAGEMENT
SYSTEMS
•
Commissioning: In accordance with CIBSE Commissioning code C.
•
Notice (minimum): 24 h.
985
PERFORMANCE TESTING
•
General: Demonstrate the performance of the installations.
- Guaranteed efficiency: Submit proposals.
•
Environmental tests: Carry out environmental testing. If necessary, use artificial loads to
simulate operating conditions.
•
Recorders: Supply and maintain portable seven day space temperature and relative
humidity recorders, complete with charts.
- Number of recorders: 4.
- Duration of loan: 1 week.
•
Reports: Submit.
990
INSPECTION AND TEST RECORDS
•
Records for water systems: In accordance with BSRIA AG 2/89.
•
Records for air systems: In accordance with BSRIA AG 3/89.
•
Record sheets: Submit.
- Number of copies: 3.
995
DEMONSTRATIONS
•
Running of plant: Run, maintain and supervise the installations under normal working
conditions.
- Duration: 2 weeks.
•
Instruction: Instruct and demonstrate the purpose, function and operation of the
installations.