TM 5-4520-253-13
ELECTRICAL PROCEDURES INDEX
PROCEDURE
I
PAGE
Inspect Combustion Blower
3-100
Inspect Ventilating Air Motor
3-102
Inspect/Test/Remove/lnstalI Safety Thermostats and Flame Switch
3-105
and Bracket Assembly
I N S P E C T C O M B U S T I O N B L O W ER
TOOLS: Tool kit, service, refrigeration unit
NSN 5180-00-596-1474
INSPECTION:
1.
2.
3.
4.
5.
6.
7.
8.
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 parson standing by who is
trained in electric shock first aid.
Allow sufficient time for heater to cool to room tempera-
ture before gaining access to heater compartments.
Remove six screws (1) and lock washers (2). Lift off bottom cover (3).
Reach through heater opening (4) and disconnect louver linkages from louvers.
Remove louver panels (5 and 6) by unlocking eight studs (7) at each panel.
Open side doors (8 and 9) and front access door (10).
Check mounting screws (11 ) for security.
Check support tube (12) for security. Be sure that screw (13) holds combustion blower (14)
firmly against support tube (12).
Be sure hose clamps (15 and 16) are tight.
Check combustion blower air duct from all available angles for punctures, breaks, or distortion
causing restricted air flow.
3-100
