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TM 9-2320-209-34-2-3
(5) Overheat switch.
FRAME 1
1.
Connect jumper wire (1) by terminal screws (2 and 3).
2.
Start heater (4) and let it run until pilot light (5) glows.
WARNING
Coolant will be hot.  Use caution when working near hot
coolant.  Severe burns could result.
NOTE
The jumper wire (1) bypasses the restriction thermostat
and keeps the heater on HI heat.
3.
Measure temperature of coolant at outlet hose (6) by letting coolant run on
thermometer.
4.
Heater (4) will overheat and burning will stop. Make note of the coolant
temperature when burning stops.  Temperature should be between 220F
and 250F.
Flip control switch (7) to OFF position. Let the blower motor stop. Take
5.
out jumper wire (1).
6.
If temperature is not as specified, get new overheat thermostat. Refer to
END OF TASK
21-13

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