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UH68 ODK/ODH Tent Heater
Operators Instructions
2-9
Shutdown
1. Place main switch in off position.
Vent fan will continue to run until heat exchanger has cooled down. The length of time
will vary depending on ambient temperature.
Operation Under Unusual Conditions
Extreme Cold, Below 10
o
F
There is a thermostatically controlled fuel heater in the carburetor block. This heats the fuel
when the temperature drops below 40 degrees F. Preheating the fuel aids combustion ignition
during extremely cold conditions. Take these steps to insure reliable operation during extreme
cold:
1. Keep fuel can full to prevent condensation in tank.
2. Clean snow and ice from fuel can filler to prevent moisture from entering fuel can,
causing fuel line freeze up.
3. Rotate the room thermo fully counter clockwise to the lowest detent setting. Turn
main switch to heat. Allow heater to stand for about sixty seconds. This allows the
carb heater to reach operating temperature before heater is started. Operate as
described in HEAT MODE section.
Operation at High Altitudes
The UH68 ODK is designed to operate at elevation up to 10,000 feet without any
modifications. At 10,000 feet heat out put may be reduce about 15 percent. This is a
normal condition which cannot be prevented.
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CAUTION
Never disconnect power to the heater while heat exchanger is
hot. Damage to the internal parts may occur.