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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-91. EVAPORATOR COIL.
This task covers:
a.
Inspection
b.
Service
INITIAL SETUP:
Tools
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Fin comb (Item 12, Appendix B)
Vacuum cleaner (item 13, Appendix B)
Goggles, industrial (Appendix C)
Personnel: 1
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 left front evaporator panel (para 4-23).
3.
Remove right front evaporator panel (para 4-25).
4.
Open control box (para 4-45).
INSPECTION
1.
Check for accumulated dirt. Clean if dirt is evident (see Figure 4-91).
2.
Check fins for dents, bent edges, or any condition that would block or distort air flow. Straighten all damaged fins
with a plastic fin comb. If a leak or major damage is evident, refer to Direct Support Maintenance.
SERVICE
WARNING
Compressed air used for cleaning purposes shall not exceed 30 psi (2.1 kg/cm2). Do not direct
compressed air against the skin. When using compressed air, wear safety glasses or goggles to
prevent dirt from being blown into your eyes.
CAUTION
Do not use steam to clean coil. Pressure can build up in system causing damage to components.
Clean coil with a soft bristle brush, vacuum cleaner and brush attachment, or use compressed air at 30 psi (2.1 kg/cm2)
or less from inside of unit to blow the dirt out. Take care to avoid fin damage. When using compressed air, wear safety
glasses or goggles. Dirt can be blown into your eyes.
4-178
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