TM 5-4520-253-13
l N S P E C T / R E M O V E / l N S T A L L R O O M T H E R M O S T A T R E C E P T A C LE
TOOLS: Tool kit, service, refrigeration unit
NSN 5180-00-596-1474
Solder gun kit
NSN 3439-00-930-1638
MATERIALS/PARTS: Sealant (Item 10, Appendix E)
Solder (Item 12, Appendix E)
Tape (Item 14, Appendix E)
Room Thermostat Receptacle
GENERAL SAFETY INSTRUCTIONS:
Power off.
Heater cool.
INSPECTION:
1. Check for presence of dust cap (1) and chain (2).
2. Check threads on room thermostat receptacle (3)
and inside dust cap (1) for stripping and crossing.
3. Carefully inspect for signs of arcing, burning, or
other damage.
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 disconnect power cable before making con-
tinuity tests or before repairing heater. Always have
another person standing by who is trained in electric shock
first aid.
4. Open control box cover and check for damage to room thermostat receptacle inside control box.
Replace defective receptacle.
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