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Index
Index
1Warning 2
2 Appliance details 3
2.1 GWH 1600 PS specifications
(Technical data) 3
2.2 Unpacking the GWH 1600 PS heater 4
2.3 General rules to follow for safe operation 4
2.4 Dimensions 5
3 Installation instructions 6
3.1 Introduction 6
3.2 Proper location for installing your heater 6
3.3 Heater placement and clearances 6
3.4 Mounting Heater 7
3.5 Combustion air requirements 8
3.6 Venting 9
3.7 Gas piping & connections 11
3.8 Measuring gas pressure 13
3.9 Water connections 13
3.10 Recirculation application 14
4 Operation instructions 14
4.1 For your safety read before operating
your water heater 14
4.2 Lighting instructions 15
4.3 To turn off appliance 15
4.4 Calibrating the thermostat 16
4.5 Winterizing 16
5 Maintenance and service 17
5.1 Maintenance intervals 17
5.2 Water valve 17
5.3 Pilot 18
5.4 Main burners 18
5.5 Vent assembly 18
5.6 Mineral scale build-up 18
6 Troubleshooting 20
6.1 Introduction 20
6.2 Pilot does not light 20
6.3 Pilot lights, but goes out when button released 20
6.4 Pilot goes out during or after hot water use 20
6.5 Burners do not light with water flow 21
6.6 Hot water temperature fluctuates at tap 21
6.7 Water is too hot 21
6.8 Water is not hot enough 22
6.9 Burners ignite without hot water flow 22
6.10 Low hot water pressure 22
6.11 Noise when heater is running 22
6.12 Burners do not operate cleanly;
yellow flames when operating 22
7 Protecting the environment 23
8 Interior components and diagram parts list 24
8.1 Interior components 24
8.2 Components diagram 25
8.3 Parts list 26
9 Twelve Year Limited Warranty 27
1 Warning
Fig. 1
Warning: The heater must be isolated
from the gas supply piping system
during any pressure testing of that
system at test pressures equal to or
more than 0.5 psig.
Caution: Any changes or
modifications not expressly approved
by the party responsible for compliance
could void the user’s authority to
operate the equipment.