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Table Of Contents - Bosch Pro Tankless GWH-450-ES Series Manual

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

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