Bosch GWH 345 ESR-N Manual page 5

Water resistant
IP X4 (protection against water drops)
2.3 Unpacking the GWH-345/450-ESR
heater
This heater is packed securely.
The box includes:
• Wall-mounted gas fired recirculating water heater
• Bracket and screws for wall hanging the heater (Part
No. 8708003143)
• Exhaust vent adaptor (with 4 screws and gasket
provided) (Part No. 8705504149)
• Combustion air inlet adaptor (with 4 screws and
gasket provided) (Part No. 8705504148)
• Installation manual
• Product registration card
• Energy Guide label
• Pressure relief valve (Part No. BP1000A150)
• Inlet air restrictors
– GWH 345 ESR N: Ø38/40/42
– GWH 345 ESR LP: Ø38/40/42
– GWH 450 ESR N: Ø44/47/50/55
– GWH 450 ESR LP: Ø47/50/55/60
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.
6 720 607 909
To remove front cover
The front cover is secured with two
i
screws to prevent unauthorized access.
Always secure the control panel and front
cover with these screws.
B Loosen the two Philips head screws located as
shown in fig. 2.
Fig. 2 Screws
B Pull control panel outwards and then pull it down-
wards (Fig. 3).
Cover screw
Fig. 3 Service position to access water and electric
connections
B Lift front cover upward and remove.
B Remove cover screws.
Appliance details
Front cover
Cover screw
Low voltage
access cover
Control panel
5