4-9
SECTION 4 –
APPLIANCES AND SYSTEMS
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
motoraid 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 “Motoraid
Water Heater” for more information.
MOTORAID WATER HEATER
–If Equipped
The motoraid uses heat from the chassis
engine cooling system to heat water in the water
heater while driving. Hoses are routed from the
engine to a heat exchanger surrounding the water
heater tank.
Under normal conditions, the entire contents
of the water heater can be heated in about two
hours or 100 miles of driving. This means you
can have hot water at the faucets immediately
upon arriving at a site.
The motoraid also increases the capacity of
the engine cooling system.
PROPANE GAS FURNACE
To Start Up:
1. Open the LP gas tank valve by turning fully
counter-clockwise
.
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.
Lift handle straight out to open P-T valve
when water heater is cold*
NOTICE
Any leak in the heat exchanger or its
supply or return lines could cause loss of
coolant and subsequent engine failure.
We recommend that you periodically
inspect these connecting lines and the
heater to insure that no leaks have
developed.
Temp Selector
• Press up or
down to select
temperature
Thermostat Switch
• Move to Heat or
Gas position for
furnace operation
