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Unpacking The Gwh-450-Es Heater - Bosch Pro Tankless GWH-450-ES Series Manual

Temperature modulated with electronic ignition - normal duty suitable for recirculating potable water only
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Water resistant
IP X4 (protection against water drops)

Unpacking the GWH-450-ES heater

This water heater is packed securely.
The box includes:
• Wall-mounted gas water heater
• Bracket and screws for wall hanging the water heater
• Exhaust vent adaptor (with 4 screws and gasket
• Combustion air inlet adaptor (with 4 screws and
gasket provided)
• Installation manual
• Product registration card
• Energy Guide label
• Safety water pressure valve
• Air deflector
• Restrictors.
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.
6 720 607 915
To remove front cover
The front cover is secured with two
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
B Pull control panel outwards and then pull it
Fig. 3
Service position to access water and electric
B Lift front cover panel upward and remove.
The GWH-450-ES is not approved or designed
• Manufactured (mobile) homes, RV's or boats
• Outdoor installation
• Combination venting with other appliances.
Appliance details



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