TM 5-4520-253-13
T E S T V E N T I L A T I N G A I R M O T OR
TEST EQUIPMENT:
AC ammeter
Tachometer, strobotac
TOOLS: Tool kit, service, refrigeration unit
NSN 5180-00-596-1474
GENERAL SAFETY INSTRUCTIONS:
Power off.
Heater cool.
TESTING:
Death or serious injury could occur if precautions are not
taken when maintaining this equipment. Position HEATER-
OFF-FAN switch to OFF, remove power cable plug from
POWER RECEPTACLE, and ground capacitors C1 and C2
prior to gaining access to heater compartments. Terminals
of capacitors are accessible at end cover of combustion
blower. Always have another person standing by who is
trained in electric shock first aid.
Remove electrical charge from ventilating air motor capaci-
tor C3 by shorting out contacts using tool having insulated
h a n d l e .
Allow sufficient time for heater to cool to room tempera-
ture before gaining access to heater compartments.
1. Remove six screws (1) and lock washers (2) and
lift off bottom cover (3).
2. Reach through heater case opening (4) and dis-
connect louver linkage from louvers of right-
hand louver panel (5).
3. Remove right-hand louver panel (5) by un-
locking eight studs (6).
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