POWERPLANT HEATER TEST - continued - TM-9-2320-209-34-2-30348

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

(4) Cycling test.

FRAME 1

Be sure control switch (1) is in OFF position. Flip HI-LO switch (2) to HI

position. Start heater (3) and let it run until it transfers to LO heat all by

itself.

Wait a few minutes after heater (3) transfers to LO heat. Measure tempera-

ture of coolant at outlet hose (4) by letting coolant run on thermometer.

WARNING

Coolant will be hot. Use caution when working near hot

coolant. Severe burns could result.

Temperature should be between 170F and 195F.

Flip control switch (1) to OFF position. Let blower motor stop.

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

END OF TASK

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