TM-9-2320-361-34

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

MAY 1992

TM-9-2320-361-34 - Page 703 of 764

TM 9-2320-361-34

17-20. FUEL BURNING PERSONNEL HEATER TESTING (Contd)

d. Flame Detector Switch Test

1. Place switch (4)in START position.

NOTE

Purge time is the interval from turning control box switch to OFF

position until indicator lamp goes out.

2. Place switch (4) in OFF position and record purge time. Burning should stop within thirty seconds

and blower motor (9) should continue to run up to three minutes. If purge time exceeds three

minutes, replace or adjust flame detector switch (6) (para.

17-15).

Place switch (4) in OFF position.

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e. Overheat Switch Test

1. Place switch (4) in START position.

2. When indicator lamp (5) illuminates, place switch (4) in RUN position and allow heater (10) to

operate for one minute.

3. Partially restrict air inlet with a sheet of cardboard or sheet metal. Overheat switch (11) should

activate and shut down heater (10) within five minutes.

4. If heater (10) does not shut down after five minutes, replace overheat switch (11) (para. 17-17).

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f. Test Equipment Removal

WARNING

Allow time for heater to cool before removing from test equipment.

Failure to do so may result in injury to personnel or damage to

equipment.

1. Close fuel shutoff valves (1).

2. Disconnect lead (2) from power source (3).

3. Remove heater (10) from test equipment.

4.

Place guard (7) on heater (10) and turn two dzus fasteners (8) to secure.

17-60