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ARMY TM 9-4120-381-14
NAVY EE-000- CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-53.
HEATER CONTRACTOR (K11).
This task consists of:
Inspection
Testing
Removal
Installation
INITIAL SETUP:
Tools
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Personnel: 1
Materials:
Varnish, moisture and fungus resistant (Item 16, Appendix E)
Equipment Conditions:
WARNING
Disconnect input power to the air conditioner before performing any internal maintenance. Voltages
used can KILL. Shutting the unit off at the control panel does not disconnect unit power.
1.
Disconnect air conditioner input power at source.
2.
Remove center front evaporator panel (para 4-22).
3.
Open left electric-plate (para 4-30).
INSPECTION
Inspect contactor for cracks, corrosion, loose electrical connections, and loose mounting hardware. Replace contactor
if cracked, broken, or badly corroded (see Figure 4-56).
TESTING
Using multimeter, measure continuity across contactor coil with one wire disconnected from coil terminal. If meter does
not read 60 ± 10 ohms, replace contactor.
REMOVAL
1.
Tag and disconnect leads.
2.
Remove three screws (1), locknuts (3), and six flat washers (2).
3.
Remove contactor and mounting plate (4).
INSTALLATION
1.
Fungus proof replacement heater contactor per MIL-V-173.
2.
Place contactor and mounting plate (4) in mounting position.
3.
Install three screws (1), locknuts (3), and six flat washers (2).
4.
Reconnect leads and remove tags.
FOLLOW ON PROCEDURE
1.
Close right electric plate (para 4-31).
2.
Close left electric plate (para 4-30).
3.
Install center front evaporator panel (para 4-22).
4.
Install right front evaporator panel (para 4-25).
5.
Connect air conditioner input power at source.
4-100
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