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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-80. ELECTRIC HEATER (EH).
This task covers:
Inspection
Removal
Adjust
Installation
INITIAL SET-UP:
Tools:
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Personnel; 1
Equipment Conditions:
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 left front evaporator panel (para 4-23).
INSPECTION
Check heater elements for deformation, damaged terminals, threads, cracked or broken parts. Replace if damaged.
TESTING
1.
Tag and disconnect leads on heater element under test.
2.
Using multimeter, check for continuity between two terminal studs of each element. If no continuity is indicated,
replace element.
REMOVAL
CAUTION
Use two wrenches to ensure that terminal stud does not turn, preventing ceramic
breakage.
1.
Remove three screws (3), flat washers (1), and lockwashers (2) (see Figure 4-80).
2.
Remove plastic cover (4).
3.
Remove two locknuts (5), lockwashers (6), and four flat washers (7).
4.
Tag and disconnect leads.
5.
Remove two nuts (8).
6.
Remove screw (14), flat washer (12), and lockwasher (13).
7.
Remove element (10) and clamp (11).
4-155
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