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UH68ODK Tent Heater
1.10 Igniter – Check igniter for carbon build up and signs
of wear. As the igniter wears the gap between 1. and 2.
will become wider and oval shaped. Replace when
signs of wear are evident.
1.11 Fuel Pump – the fuel pump has a filter screen
located at the inlet end. To clean remove three screws holding
the cap on, remove the cap being careful not to tear the gasket,
and remove the filter screen. Pay close attention to the
orientation or the filter screen in the pump foe reassembly.
Clean screen and cap with carb cleaner. Cap has a magnet to
trap metal particles. Reassemble and check for leaks.
Filter located
here
1.12 Heat Exchanger
WARNING!
DEATH OR SERIOUS INJURY
CARBON MONOXIDE
The heat exchanger must be inspected annually, or more frequently if heater usage is
heavy. A damaged heat exchanger can allow poisonous gases to seep into the heated
enclosure causin
g
illness or death to occu
p
ants.
Inspect heat exchanger in accordance with the procedures in TM 5-4520-253-13
1.13 Overheat Safety System
The overheat safety switch must be cycled before heater is used after storage or
replacement of overheat switch.
Block inlet air
here for testing
Overheat Testing - Start heater and let run for about 10 minutes
without the ducts attached. Using a piece of
paper or similar, block the inlet air about
three-quarters of the way shut. At 70 degrees
F the heater will shutdown in about a minute.
Temperature at shutdown should be between
275 and 300 degrees F. If the overheat safety switch does not
work it MUST be replaced. Replace thermostat in accordance
with procedures in TM 5-4520-253-13, 3-105
3-6