6 720 607 915
2
Index
Index
1
Warning 2
2
Appliance details
4
2.1
Features 4
2.2
GWH-450-ES Specifications (Technical data)
4
2.3
Unpacking the GWH-450-ES heater
5
2.4
General rules to follow for safe operation
6
2.5
Cascading function
6
2.6
Dimensions and minimum installation clearances
7
2.7
Applications 8
3
Installation instructions
9
3.1
Introduction 9
3.2
Proper location for installing your water heater
9
3.3
Water heater placement and clearances
9
3.4
Mounting installation
9
3.5
Combustion air requirements
10
3.6
Venting
11
3.6.1
Venting options
14
3.7
Gas piping & connections
16
3.8
Measuring gas pressure
18
3.9
Water connections
19
3.10
Electrical connections
19
4
Operating instructions
20
4.1
For your safety read before operating your water
heater 20
4.2
Startup instructions
20
4.3
Power 21
4.4
Water temperature
21
4.5
Power adjustment
21
4.6
Freeze prevention
21
4.7
Electrical diagram
22
5
Maintenance and service
23
6
Troubleshooting 24
7
GWH-450-ES Functional scheme
26
8
Interior components diagram and parts list 27
8.1
Interior components
27
8.2
Components diagram
28
8.3
Parts list
29
9
Protecting the environment
30
10
Fifteen Year Limited Warranty
31
1
Warning
For your safety
Do not store or use gasoline or other flammable,
combustible or corrosive vapors and liquids in the
vicinity of this or any other appliance.
Warning:
Carefully plan where you
install the heater. Correct combustion
air supply and flue pipe installation are
very important. If a gas appliance is not
installed correctly, fatal accidents can
result from lack of air, carbon monoxide
poisoning or fire.
Warning:
Exhaust gas must be vented
to outside using proper vent material
suitable for category III vent systems
and temperatures up to 480°F. Vent
and combustion air connector piping
must be sealed gas-tight to prevent
possibility of flue gas spillage, carbon
monoxide emissions and risk of fire,
resulting in severe personal injury or
death.
Warning:
Place the recirculating water
heater in a location where water leaks
will do NO DAMAGE to adjacent areas
or lower floors.
Warning:
Field wiring connections and
electrical grounding must comply with
local codes, or in the absence of local
codes, with the latest edition of the
National Electric Code, ANSI/NFPA 70,
or in Canada, all electrical wiring must
comply with the local codes and the
Canadian Electrical Code, CSA C22.1
Part 1.
Warning:
Shock hazard line voltage is
present. Before servicing the
recirculating water heater, turn off the
electrical power to the recirculating
water heater at the main disconnect or
circuit breaker. Failure to do so could
result in severe personal injury or death.
