Installation guide

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CONTENTS
PAGE
SECTION 1 GENERAL AND SAFETY INFORMATION
General Information 4
British Standards and Codes of Practice 4
Health and Safety Regulations 1993 4
Legionellae in Water Heaters 5
SECTION 2 TECHNICAL DETAILS
Technical Details – CWH30/60/90/120 6
Heater Dimensions – 200 litre model 7
Heater Dimensions – 300 litre model 8
SECTION 3 INSTALLATION
Description 9
L
ocation 9
Water Quality and Treatment 10
W
ater Connections 10
Condense Drain 11
Typical Installations – CWH30/60 & CWH90/120 12
Gas Supply – Natural Gas 13
Gas Supply – Propane 13
Typical Bulk Storage Vessel Installation 14
Typical Cylinder Installation 14
Electrical Supply 15
Electrical Connection 15
Wiring Diagram 16
Temporary Water Heater Temperature Change 17
Circulation Pump and Storage Tanks 17
HWST Tank Dimensions and Wiring Diagram 18
Flue Systems 19
Flue Systems – CWH 30 & 60 20
Alternative Flue Systems – CWH 30 & 60 21
Standard Flue System Dimensions – CWH 30 & 60 22
Flue Systems – CWH 90 & 120 23
Alternative Flue Systems – CWH 90 & 120 24
Standard Flue System Dimensions – CWH 90 & 120 25
Flue System Positions and Distances 26
Flue System – Horizontal and Vertical Terminations 27
Air Supply and Ventilation – Concentric Flue Systems 28
Air Supply and Ventilation – Concentric and Conventional Flue Systems 29
Air Supply and Ventilation – Conventional Flue Systems 30
Heat Exchanger Configuration 31
Control Panel 31
SECTION 4 WATER TEMPERATURE SETTINGS
Temperature Setting 32
Adjusting Temporary Temperature Change 32
SECTION 5 INSTRUCTIONS FOR COMMISSIONING
Filling the Water Heater 33
Commissioning – Natural Gas and Propane 33
CO
2
Adjustment 33
Control and Adjustment at Full Load 34
Control and Adjustment at Low Load 34
Decommissioning 34
Draining the Water Heater 34
SECTION 6 FAULT CODES
Fault Codes 35
Blocking Faults 35
Lockout Faults 35
SECTION 7 MAINTENANCE
Annual Maintenance Checks 36
SECTION 8 PARTS LIST
Spares List for CWH Range 37
Unvented System Kits 39
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