SECTION 4 -
APPLIANCES AND SYSTEMS
4-6
Normally there is an air gap at the top of the
water heater tank which acts as a pressure buffer.
In time, however, heated water may expand and
fill this air gap, causing a slight increase in water
pressure. This may cause the P-T valve to “weep”
until the air gap is manually replaced.
To Replace the Air Gap:
1. Turn off the water heater switch and incoming
water supply (city water and/or demand
pump).
2. Open a faucet in the motor home to relieve
water pressure.
3. Pull the handle of the P-T valve straight out
and allow water to flow until it stops.
4. Let the handle of the P-T valve snap shut.
5. Close the faucet and turn on the water supply
before switching the water heater on.
Manually operate the pressure temperature
relief valve at least once a year.
NOTE: If your water heater is equipped with the
Motor Aid system, it uses an extension
from the engine cooling system to heat
water in the water heater while driving.
The engine cooling system must also be
cold before opening the pressure-
temperature relief valve. See “Motor Aid
Water Heater” for more information.
PROPANE GAS FURNACE
To Start Up:
1. Open the LP gas tank valve by turning fully
counterclockwise
2. Move THERMOSTAT switch from Off to
Heat and press the Temp Selector button (Up/
Down arrows) until the desired temperature is
shown in the display.
3. Furnace fan should start to blow immediately
after setting the thermostat.
4. After about 30 seconds, the furnace burner
should light.
5. The furnace should now cycle off and on
automatically as the thermostat demands just
like a household furnace.
NOTE: If heat does not come out of the heat
ducts after a minute or so the burner is
not lit.
Turn thermostat off for 3-5 minutes,
check to be sure propane gas tank valve
is open and tank is not empty, then try
steps 2-4 again.
If the furnace will not light after three
CAUTION
Operate this valve only when the water
heater and engine cooling system are
cold!
Lift handle straight out to open P-T valve
when water heater is cold*
Thermostat Switch
• Move to Heat or
Gas position for
furnace operation
Temp Selector
•Press up or
down to select
temperature
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