Bosch GWH C 920 ES Instruction Manual page 6

Appliance details
2.3 Unpacking the tankless water
heater
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.
Fig. 2 Rating plate
A Serial number
B Type of gas
The box includes:
• Tankless water heater
• Pressure relief valve (150 psi / 500,000 Btu rating)
• Bracket for wall hanging the heater
• Exhaust vent adaptor (with 4 screws and gasket
provided)
• Combustion air inlet adaptor (with 3 screws and gas-
ket provided)
• Installation manual (manual can be downloaded from
www.boschpro.com)
• Product registration card.
Please complete and return the enclosed product
registration card.
The tankless water heater is not approved or
designed for:
• Manufactured (mobile) homes, boats or any
mobile installation. (Modular homes are
acceptable for installation).
• Use above 8000 ft A.S.L. altitude (see page 18).
• Outdoor installation without installation of
Outdoor kit (PTOK).
• Applications where inlet water temperature is
higher than 140°F (60°C). A thermostatic
mixing valve must be installed before the
appliance.
• Space heating purposes.
6
To remove front cover
B Loosen the two Philips head screws located on
bottom rear of cover (see Fig. 3).
Fig. 3 Loosen the two screws
B Lift front cover upward and remove.
Fig. 4 Remove the front cover
To remove combustion cover (service only;
unplug appliance before removing cover)
B Open the four clips and remove the combustion
cover (see Fig. 5).
Fig. 5 Remove the combustion cover
6 720 608 836