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plumbing SyStem
TANKLESS WATER HEATER (If So Equipped)
Your motor home may be equipped with a tankless water heater. The tankless water heater
uses less LP Gas than storage tank model water heaters since it only uses energy when hot
water is demanded. There is no pilot light to burn when no hot water is needed. The tankless
water heater supplies an unlimited supply of hot water on demand (once lines are purged of
standing water). As hot water is used, the cold water enters the heater. A water ow sensor
detects the owing water and automatically ignites the burner. Water circulates through the
heat exchanger and is heated to the set temperature. When the tap is closed, the unit shuts
down.
The tankless water heater does not require an anode rod to prevent corrosion, or a by-pass
valve for winterizing. It is not affected 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 65ºF 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.
Operating Tips
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 off is approximately 131° F).
● Reduce hot water ow.
For Additional Information
For detailed operating information refer to the manufacturer’s owner’s manual included in
the Warranty Packet.
Winterization
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 DOES NOT require the
installation of a bypass kit. Winterization can be accomplished using one of the two
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