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To reduce temperature:
○ Turn GMC dial “counter-clockwise”.
○ Increase hot water ow.
○ Gradually add cold water.
To increase temperature:
○ Turn GMC dial “clockwise”. NOTE: Use caution not to increase the dial too
much which could cause the hot water temperature to rise to the point the water
heater “limits’ and turns OFF the ame (ame shut o is approximately 131° F).
○ Reduce hot water ow.
, refer to the manufacturer’s owner’s manual.
Freezing of the water heater and its plumbing components will result in severe damage not
covered by warranty. For this reason it is advisable to follow the recommendation(s) below
if the unit is to be stored in a freezing environment or for long periods of time. At the start
of the winter season or before traveling to a location where freezing conditions are likely,
the unit must be winterized.
The very small amount of water present in the heat exchanger require the in-
stallation of a bypass kit. Refer to the Winterization section for details.
Inspect your water heater monthly and have it serviced at least once a year by the manu-
facturer’s recommended service technician. If you have further questions contact your RV
dealer, the manufacturer, or Customer Service.
For more information, refer to the manufacturer’s user guide
Valve is not serviceable; if defective it must be replaced.
Tampering with valve will result in scalding injury. Do not place a plug
or reducing coupling on outlet part of valve. If you use a discharge line
allow complete drainage for both valve and line.
Tampering with valve will void the warranty.
Outside Shower (if so equipped)
A handheld shower assembly with both hot and cold water may be included for use outside
of your recreational vehicle.
1. Be sure the water heater is ON and had sucient time to heat the water.
2. Open the outside shower compartment door.
3. If dry camping, be sure the 12-volt water pump is ON.
4. Remove the handheld shower from its holder.
5. Turn ON the hot and cold faucet knobs, and adjust the water temperature as desired.
6. To activate the handheld shower turn ON the sprayer head attachment (some models).
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