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Appliance details
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.
To remove front cover
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).
Fig. 3 Service position to access water and electric
connections
B Lift front cover upward and remove.
B Remove cover screws.
i
The front cover is secured with two
screws to prevent unauthorized access.
Always secure the control panel and front
cover with these screws.
Front cover
Control panel
Low voltage
access cover
Cover screw
Cover screw
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