Bosch GWH 635 ES User Manual page 5

Combustion
• NOx ≤ 55 ppm
• CO ≤ 250 ppm
• CO level set from factory, see chapter 9.
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Dimensions
• Depth (in): 8 ½" (220 mm)
• Width (in): 15 ¾" (400 mm)
• Height (in): 23 ½" (600 mm)
• Weight: 47 pounds (21 kg).
Gas types
Natural Gas.
LP Gas.
Converting the gas type can only be done by a certified
gas technician with a calibrated CO
Call BBTNA for conversion instructions.
Voltage
120 V AC (50/60 Hz)
Amperage
IDLE - 40 mA
Operation - ≤ 2,5 A
Noise
≤ 50 db (A)
Safety devices
• Flame failure device (ionization flame rod sensor)
• Pressure relief valve (supplied with heater)
• Over heat prevention (temperature limiter).
Water resistant
IP X4 (protection against water drops)
UNPACKING THE GWH-635-ES HEATER
This heater is packed securely.
The box includes:
• Pressure relief valve (150 psi / 200,000 Btu rating)
• Bracket for wall hanging the heater
• Exhaust vent adaptor (with 4 screws and gasket
provided)
• Condensate drain tube kit
• Combustion air inlet adaptor (with 3 screws and gas-
ket provided)
• Plastic decal shields for covering front cover screws
and control panel, installer should affix these decals
to the front of the unit after installation is complete.
See Fig. 3
• Installation manual
• Product registration card
• Energy Guide label.
6 720 607 072
Do not lose this manual. Please complete and return
the enclosed product registration card.
Before installing the unit, be certain you have the
correct heater for your type of Gas - Propane or
Natural Gas. Identification labels are found on the
shipping box, and on the rating plate which is located on
the right side panel of the cover.
To remove front cover
• Loosen the two Philips head screws located on front
• Lift front cover panel upward and remove.
analyzer.
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Fig. 3
The GWH-635-ES is not approved or designed
for:
• Manufactured (mobile) homes, RV's or boats
• Heating or other recirculating/pumping applications*
• Outdoor installation (use only Outdoor Model GWH-
• Solar/preheat backup or high temperature booster
* This includes domestic hot water circulator pump loop
systems that may previously exist in a home hot water
system. The use of a small electric mini-tank (4-6 gallon
size) should be used for this application; when
designed so the pump will circulate the hot water in the
mini-tank only and through the building's hot water
return loop (timed or thermostatic controlled operation
of the pump is commonly done). The GWH-635-ES
should be plumbed in line before the mini-tank water
heater, contact BBTNA if further instruction is needed.
panel (beneath plastic decal shields if they are
already attached, see Fig. 3)
Plastic decals
Remove front cover
635-ESO)
use.
Appliance details
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