Water heaters for use with Natural and L.P.G.

GWH 425 EF

Flow Modulated with Electronic Ignition and Power Venting

Suitable for heating potable water o nly - Not approved for space heating purposes

(Intended for variable flow applications with steady cold water inlet temperatures)

GWH-425-EF-N

GWH-425-EF-L

6 720 607 017 US (04.10) AL
Warning: If the information in this manual is not
followed exactly, a fire or explosion may result
causing property damage, personal injury or death.
Do not store or use gasoline or other flammable
vapor and liquids in the vicinity of th is or any other
appliance.
Improper installation, adjustment, alteration,
service or maintenance can cause injury or
property damage. Refer to this manual. For
assistance or additional information consult a
qualified installer, service agency or the gas
supplier.
In the Commonwealth of Massachusetts this
product must be installed by a licensed plumber or
gas fitter.
Upon completion of the installation, these
instructions should be handed to the user of the
appliance for future reference.
What to do if you smell gas
• Close gas valve. Open windows.
• Do not try to light any appliance
• Do not touch any e lectrical switch; do not use any
phone in your building
• If you cannot reach your gas supplier, call the fire
department.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• Installation and service must be performed by a
qualifi ed installe r, service ag ency or the gas su pplier.