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valve for winterizing. It is not aected by high altitudes.
The output temperature of the water depends on the temperature of the inlet water AND the
amount of hot water that is drawn. If the inlet water temperature is over 65 º F, the tankless
water heater will generate water in the range of 105°F to 120°F (on low ame) depending on
the water ow selected by the user.
Purge air out of ALL hot and cold water lines.
Open the water heater door and turn the power switch “ON”.
Set GMC (gas modulator dial) to appropriate setting.
○ Normal weather – set dial to the middle area.
○ Extreme cold weather – set dial to the extreme right (large ame).
○ Extreme hot weather – set dial to the extreme left (small ame).
Open hot water faucet to a medium water ow. It may take a few seconds for the
water to travel from the water heater to the faucet.
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 approxi-
mately 131° F).
○ Reduce hot water ow.
Refer to the manufacturer’s manual for detailed operating and safety information.
Freezing of the water heater and its plumbing components will result in severe damage not
covered by warranty Follow the recommendation(s) below if the unit is to be stored in a
freezing environment for a long period 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.
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.
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