Bosch GWH 425 PN Specifications download pdf (Page 4)

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Appliance details

2 Appliance details

2.1 Features

• Burner output proportional to hot water flow demand

for maximum energy efficiency

• Stainless steel burners with stabilized blue flame

• Built-in corrosion resistant draft diverter

• Adjustable water flow restrictor to ensure that water

flow demand will not exceed the heating capacity of

the heater

• Safety flame sensor at pilot burner

• Automatic overheating protection shut-off sensor

• Copper heating coils for endless supply of hot water

• Easily removable one-piece cover

• Easy one person installation

• Electronic Pilot Ignition driven by hydro-generator.

2.2 GWH-425-HNO specifications

(Technical data)

Approved in US/Canada

Capacity

Maximum flow rate: 3.7 GPM (14 l/min) at a 45°F

(25°C) rise.

Maximum output

101,772 Btu/h (29.8 kW)

Maximum input

117,000 Btu/h (34.3 kW)

Efficiency in %

Recovery efficiency 80%

Min. Output

28,000 Btu/h (8.2 kW)

Gas Requirement

Gas connection (inches) - ¾”

Inlet gas pressure under maximum operation*

• Propane: 10.5” - 14” water column

• Natural Gas: 5.7” - 14” water column.

* To measure Gas Pressure, see Measuring Gas

Pressure, chapter 3.6.

Water

• Hot water connection (inches) - ½”

• Cold water connection (inches) - ½”

• Water valve material: Polymer (PPS) (Polypropylene

Sulfid)

• Minimum water flow: 0.5 gallon/minute (1.9 l/m)

• Minimum recommended water pressure: 30 PSI

(2.07 bar)

• Connections:

– Bottom of heater

Dimensions

• Depth (in): 10.5” (265 mm)

• Width (in): 18.25” (460 mm)

• Height (in): 36.75” (936 mm)

• Weight: 64 pounds (29 kg).

Gas types

Natural Gas.

LP Gas

Safety devices

• Flame failure device (ionization flame rod sensor)

• Pressure relief valve (supplied with heater)

• Over heat prevention (temperature limiter).

Water resistant

IP X5 (protection against water drops).

BOSCH is constantly improving its

products, therefore specifications are

subject to change without prior notice.

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