Table of Contents
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Index
Index
1
Warning
2
2.1
Features
2.2
GWH-345/450-ESR Specifications (Technical data)
2.3
Unpacking the GWH-345/450-ESR heater
2.4
General rules to follow for safe operation
2.5
2.6
Applications
2.7
3
3.1
Introduction
3.2
Proper location for installing your heater
3.3
Heater placement and clearances
3.4
Mounting installation
3.5
3.6
Venting
3.6.1
Vent material and specifications
3.6.2
Vent connections and combustion air inlet restrictors
3.6.3
Condensate drain requirements
3.6.4
Room sealed installation (Twin pipe)
3.6.5
Vertical terminations
3.6.6
Horizontal terminations
3.6.7
Exhaust vent configuration examples
3.7
Gas piping & connections
3.8
Measuring gas pressure
3.9
Checking restrict. plate size by measuring CO
3.10
3.11
4
4.1
4.2
For your safety read before operating your water heater
4.3
4.4
Power
4.5
4.6
4.7
4.8
5
5.1
6
7
8
9
Interior components diagram and parts list
9.1
Interior components
9.2
Components diagram
9.3
10
11
2
1
2
For your safety
4
Do not store or use gasoline or other flammable,
4
combustible or corrosive vapors and liquids in the
4
5
vicinity of this or any other appliance.
6
7
8
9
10
10
10
10
10
11
13
13
14
17
17
18
18
22
23
25
level value 26
2
26
27
28
28
28
28
29
29
29
29
30
31
31
33
34
36
37
37
38
39
40
41
Warning
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 3" single wall sealed
stainless steel vent pipe suitable for
category
III
vent
temperatures up to 480°F. Vent and
combustion air connector piping must
be
sealed
gas-tight
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 NOT DAMAGE 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
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.
systems
and
to
prevent
servicing
the
6 720 607 909
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