POWERPLANT HEATER TEST - continued - TM-9-2320-209-34-2-30349

TM 9-2320-209-34-2-3

(5) Overheat switch.

FRAME 1

Connect jumper wire (1) by terminal screws (2 and 3).

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.

Measure temperature of coolant at outlet hose (6) by letting coolant run on

thermometer.

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

out jumper wire (1).

If temperature is not as specified, get new overheat thermostat. Refer to

END OF TASK

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