Specification 037. Air Conditioning, Air Cooling and Mechanical Ventilation for Buildings

175 Pages·2004·2.2 MB·English

DEFENCE ESTATE ORGANISATION
MINISTRY OF DEFENCE
Specification 037
Air conditioning, air cooling and
mechanical ventilation for buildings
This specification supersedes the former PSA Standard
Specification (M & E) No. 100
MINISTRY Of DEFENCE
BIAKEMOREDRSVE,
ACCESSION No. COPY
1
October 1997
INDUSTRIAL PROCESSES GROUP
DEFENCE ESTATE ORGANISATION MAIN
Ministry of Defence
London: The Stationery Office
Crown copyright 1998. Published with the permission of the Ministry of
Defence on behalf of the Controller of Her Stationery Office
Applications for reproduction should be made in writing to The
Copyright Unit, Her Majesty's Stationery Office, St Clements House,
2-16 Colegate, Norwich NR3 1BQ
First published May 1998
ISBN 0 11 772857 8
References updated to July 1997
Prepared by Ove Arup and Partners on behalf of the Defence Estate
Organisation
Cover photograph by kind permission of the International
Convention Centre, Birmingham
Contents
Page
Contents iii
Schedules ix
Tables X
Foreword xi
Abbreviations xii
Amendmends xiii
1 General Requirements
1.1 Scope 1
1.2 Definitions 1
1.3 Related Documents 1
1.4 Proven Performance 1
1.5 Standards 1
1.6 Acts and Regulations 2
1.7 Electricity Supply 2
1.8 Electrical Equipment and Wiring 2
1.9 Drawings 2
1.10 Calculations 4
1.11 Maintenance and Operation Documents 4
1.12 Corrosion Prevention and Painting 4
1.13 CFCs and HCFCs 4
1.14 Identification of Services 4
1.15 Storage and Protection 4
1.16 Rationalisation of Supplies 5
1.17 Samples 5
1.18 Schedules 5
2 Refrigeration Plant
2.1 General 6
2.2 Reciprocating Compressors 7
2.3 Centrifugal Compressors 8
2.4 Screw Compressors 8
2.5 Scroll Compressors 9
2.6 Absorption Refrigeration 9
2.7 Water Chilling Evaporators (Shell and Tube Type) 10
2.8 Air Cooling Evaporators (Dx Coolers) 10
2.9 Air-cooled Condensers 11
2.10 Evaporative Condensers 11
2.11 Condensers (Shell and Tube Type) 11
October 1997 iii
2.12 Pressure Testing 12
2.13 Refrigeration Plant Accessories and Controls 12
2.14 Refrigerant Piping 13
2.15 Thermal Insulation 14
2.16 Dry Coolers (Air-cooled Fluid Coolers) 14
2.17 Cooling Towers 15
3 Fans
3.1 General 19
3.2 Centrifugal Fans 20
3.3 Axial Flow Fans 21
3.4 In-line Centrifugal and Mixed Flow Fans 21
3.5 Propeller Fans 21
3.6 Mechanical Roof Extract Units 22
3.7 Packaged Duplicate-fan Extract Units 22
3.8 Protectively — Coated Fans and Fans for Corrosive or Hazardous
Applications 22
4 Air Filters
4.1 General 23
4.2 Filter Cell Holding Frames, Seals and Gaskets 23
4.3 Fire Properties 23
4.4 Performance Certification 23
4.5 Filter Grades 24
4.6 Bag or Extended Surface Type Filters 24
4.7 Panel Filters 24
4.8 High Efficiency Particulate Air (HEPA) Filters 25
4.9 Activated Carbon and Adsorption Filters 25
4.10 Grease Eliminators 26
5 Air Heater and Cooler Batteries
5.1 General 28
5.2 Tests 29
5.3 Hot Water Heater Batteries 29
5.4 Steam Heater Batteries 30
5.5 Electrical Heater Batteries 30
5.6 Chilled Water Cooler Batteries 30
5.7 Direct-expansion Refrigerant Cooler Batteries 30
6 Air Washing and Plant
6.1 General 32
6.2 Steam Humidifiers 32
6.3 Ultra-sonic Type Humidifiers 33
6.4 Drainageen 33
7 Air Handling Units
7.1 General 35
7.2 Construction 35
7.3 Thermal and Acoustic Insulation 36
7.4 Dampers 36
7.5 Fans 36
7.6 Provisions for Automatic Controls, Sensors, Instruments and Test
Holes 36
7.7 Outdoor Units 36
8 Ductwork, Dampers and Terminal Devices
8.1 Fabrication Drawings 38
October 1997
8.2 Sheet Metal Ductwork 38
8.3 Installation 38
8.4 Inspection and Tests 39
8.5 Plastics Ductwork 39
8.6 Aluminium Ductwork 39
8.7 Pvc Coated Sheet Steel Ductwork 39
8.8 Steel Ductwork, Galvanised after manufacture 39
8.9 Stainless Steel Ductwork 39
8.10 Bendable Ducts and Flexible Ducts 39
8.11 Lightweight Ducting 40
8.12 Dampers 40
8.13 Access Openings, Cleaning and Inspection Covers 41
8.14 Hoods 42
8.15 Test Holes 42
8.16 Identification 42
8.17 Air Terminal Devices 42
9 Air Control Devices Including Induction, Terminal Reheat
and VAV Units
9.1 General 45
9.2 Induction Units 45
9.3 Single and Dual Duct Terminal Units 45
9.4 Variable Air Volume (VAV) Units 46
9.5 Underfloor Fan-assisted Air Units 46
9.6 Constant Volume Flow Regulators 46
10 Fan Coil Units
10.1 General 47
10.2 Casings 47
10.3 Components 47
10.4 Arrangement of Units 48
10.5 Controls, Dampers and Grilles 48
11 Ventilating, Kitchen Ventilating and Chilled Ceilings,
Chilled Beams and Platform Floors
11.1 General 49
11.2 Ventilating Ceilings 49
11.3 Ventilating Platform Floors 50
11.4 Kitchen Ventilating Ceilings 50
11.5 Chilled Ceilings 50
11.6 Chilled Beams 50
12 In-room Air Conditioning Units
12.1 General 52
12.2 Construction 52
12.3 Unitary Reverse Cycle Heat Pumps 52
12.4 Insulation 53
12.5 Grilles 53
12.6 Air Filters 53
12.7 Fans 53
12.8 Refrigeration Equipment 53
12.9 Humidifiers 53
12.10 Heaters 53
12.11 Coolers 53
12.12 Controls 53
12.13 Electrical Requirements 53
October 1997
13 Water Pumps
13.1 General 54
13.2 Centrifugal Pumps 54
13.3 Twin Pump Sets 55
13.4 Canned Rotor Pumps 55
13.5 Stand-by Pumps 55
13.6 Gauges 55
13.7 Drives 55
13.8 Sump Pumps 55
14 Pipework
14.1 General 56
14.2 Materials 56
14.3 Joints 56
14.4 Flexible Piping Connections 57
14.5 Flexible Connectors 57
14.6 Welding 57
14.7 Brazing 58
14.8 Ancillary Equipment 59
14.9 Draining and Flushing Provisions 60
14.10 Installation 60
14.11 Provision for Tests 62
14.12 Provision for Chemical Cleaning and Water Treatment 62
15 Valves, Cocks and Strainers
15.1 General 65
15.2 Materials and Construction 65
15.3 Isolating Valves 65
15.4 Check Valves 66
15.5 Regulating and Double Regulating Valves 66
15.6 System Commissioning Valve Sets 66
15.7 Drain Valves 66
15.8 Air Cocks 66
15.9 Valve Operation 66
15.10 Strainers 67
15.11 Valve Labelling 67
15.12 Valve Schedules 67
16 Water Storage Vessels
16.1 Cisterns and Cold Water Tanks 68
16.2 Chilled and Condenser Water Buffer Vessels 68
17 Thermal Insulation
17.1 General 69
17.2 Ductwork and Air Handling Plant — Insulation Materials and
Finishes 70
17.3 Ductwork and Air Handling Plant — Methods of Application 71
17.4 Chilled Water Pipework and Equipment — Insulation Materials
and Finishes 72
17.5 Chilled Water Pipework and Equipment — Methods of Application 73
17.6 Vapour Barriers 73
17.7 Painting and Identification 74
18 Water Treatment
18.1 General 77
18.2 Pretreatment Plant 77
18.3 Water Sampling and Test Equipment 78
October 1997
18.4 Chemical Dosing and Bleed-off 78
18.5 Corrosion Monitoring Equipment 78
18.6 Storage of Chemicals 78
19 Heat Wheels, Heat Pipes, Air and Water Plate Heat
Exchangers and Run-around Coils
19.1 General 79
19.2 Heat Wheels 79
19.3 Heat Pipe Units 79
19.4 Plate Heat Exchangers (Air) 79
19.5 Plate Heat Exchangers (Water) 80
19.6 Run-around Coils 80
20 Belt Drives, Variable Speed Drives and Guards
20.1 Belt Drives 81
20.2 Variable Speed Drives 81
20.3 Belt Drive Pulleys 81
20.4 Guards 82
20.5 Electric Motors 82
21 Vibration Isolation and Noise Insulation
21.1 Anti-vibration Provisions 83
21.2 Noise 83
21.3 Noise Insulation (Airborne Noise) 83
21.4 Circular and Rectangular Attenuators 83
21.5 Sound Absorbent Ductwork Linings 84
21.6 Fixing of Thermal and Acoustic Linings 84
21.7 Acoustic Enclosures 84
22 Instruments
22.1 General 85
22.2 Air System Pressure Gauges 85
22.3 Air System Thermometers 85
22.4 Water System Thermometers 86
22.5 Pressure Gauges 86
22.6 Filter Differential Pressure Indicators 87
22.7 Remote Reading Thermometers 87
23 Automatic Controls
23.1 General 88
23.2 Air Compressor Plant for Pneumatic Controls Systems 88
23.3 Control Equipment Features 89
23.4 Sensing Elements 89
23.5 Motorised Dampers 90
23.6 Air Heater Control 90
23.7 Air Cooler Control 90
23.8 Humidifier Control 90
23.9 Controls for Water Cooling and Chilling Plant 90
24 Starter and Control Panels
24.1 General 91
24.2 Panel Arrangement 91
24.3 Materials and Construction 91
24.4 Panel Wiring 92
24.5 Identification Labels 92
24.6 Ventilation 92
24.7 Instruments and Indication 92
October 1997 vii
24.8 Starters and Control Gear 93
24.9 Automatic Control 93
24.10 Testing 94
24.11 Screening and Interference 94
25 Electrical Equipment and Wiring
25.1 Scope 95
25.2 General 95
25.3 Electric Motors 95
25.4 Electrical Wiring 95
25.5 Screening and Interference 95
26 Testing and Commissioning
26.1 Definitions 97
26.2 General 97
26.3 Cleaning 98
26.4 Testing 98
26.5 Commissioning of Water and Air Distribution Systems 99
26.6 Commissioning of Specialist Equipment 99
26.7 Commissioning Results 99
26.8 Performance Testing
26.9 Sound Level Measurements
27 Maintenance and Operation Procedures and Documents
27.1 Installer Maintenance Procedures
27.2 Instruction Procedures
27.3 Maintenance and Operation Documents
viii October 1997
Schedules
Schedule No. 1: Information for the Tenderer Supplied by the Design Office
1 (of addendum)
(17 pages)
Schedule No. 2: Information to Be Supplied by the Tenderer
1 (of addendum)
(36 pages)
October 1997