TM 5-4520-253-13
HEAT EXCHANGER PROCEDURES INDEX
PAGE
Remove/Install Heat Exchanger
4-67
Clean/Inspect/Repair Heat Exchanger
4-72
REMOVE/lNSTALL HEAT EXCHANGER
TOOLS: Tool kit, service, refrigeration unit
NSN 5180-00-596-1474
MATERIALS/PARTS: Silicone sealant (Item 11, Appendix E)
GENERAL SAFETY INSTRUCTIONS:
Power off.
Heater cool.
REMOVAL:
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.
Allow sufficient time for heater to cool to room tempera-
ture before gaining access to heater compartments.
1. Open access door (1). Locate thermostat mounting bracket (2) and flame switch and bracket
assembly (3).
2. Remove two screws (4) and lock washers (5) at bracket (2) and lift out thermostat (6).
3. Remove two screws (7) and lock washers (8). Lift out flame switch and bracket assembly (3)
and thermostat (9).
4. Close shutoff valve at fuel container.
4-67
