SECTION 8 - PLUMBING SYSTEM CLASS C MOTOR HOME
GH/M 8 - 4
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 flame) depending on the water flow 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 dial to appropriate setting.
□ Open hot water faucet to a medium water flow.
□ To reduce temperature:
o Turn GMC dial “counter-clockwise”.
o Increase hot water flow.
o Gradually add cold water.
□ To increase temperature:
o Turn GMC dial “clockwise”.
o Reduce hot water flow.
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 common methods of winterization used for RV water systems, The
compressed air method or the anti-freeze method. Refer to “Winterization” in this
section for details.
Winter Use Device (WUD)
If you wish to operate the water heater in potentially freezing conditions the model
GSWH-1M has a built in thermostat that will start the burner whenever the
temperature of the Heat Exchanger falls below 38ºF and will automatically shut off
when it senses a temperature in excess of 58 ºF.
IMPORTANT:
To allow the WUD device to operate you must have sufficient LP Gas in the tank
and you must leave the unit powered with the ON / OFF switch in the ON position
at all times that freezing may occur. It will not protect the entire RV’s plumbing
system. The RV must be designed for winter use/freezing conditions.
PRESSURE - TEMPERATURE RELIEF VALVE
This water heater is equipped with a temperature and pressure relief valve that
complies with the standard for Relief Valves and Automatic Gas Shutoff Devices
for Hot Water Systems, ANSI Z21.22.
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