Unpacking the 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.
 Serial number
 Type of gas
3.3.1 The box includes
Bracket for wall hanging the heater
Installation manual (manual can be downloaded at
Product registration card
Energy Guide label (in the front cover)
Please complete and return the enclosed product registration
The 940 ES is not approved or designed for:
Manufactured (mobile) homes, boats or any mobile
installation. (Modular homes are acceptable for
Use above 8000 ft A.S.L. altitude (see page 31).
Outdoor installation without installation of Outdoor kit
Applications where inlet water temperature is higher
than 140°F (60°C). A 3-way valve or mixing valve must
be installed before the appliance if inlet water
temperature exceeds this limit.
3.3.2 Remove front cover
▶ Loosen the two Phillips head screws located on bottom rear
Loosen the two screws
▶ Lift front cover panel upward and remove.
Remove the front cover
940 ES – 6 720 644 930 (2019/09)