TM9-4120-400-14
4-45.
EVAPORATOR COIL. - continued
INSPECTION
1. Check for accumulated dirt. Clean if accumulation of dirt is evident.
2. Check fins for dents, bent edges, or any condition that would block or distort airflow. Straighten all damaged
fins with a plastic fin comb.
Compressed air used for cleaning purposes will not exceed 30 psi (2.1 kg/cm2).
Do not use steam to clean coil.
CLEANING
Clean coil (1) with a soft bristled brush, and use compressed air at 30 psi (2.1 kg/cm2) or less from the inside of
the coil 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. Should a leak or major damage be evident notify your supervisor.
NOTE
FOLLOW-ON MAINTENANCE:
Install mist eliminator (para 4-16).
Install supply air louver (para 4-14).
SOLENOID VALVE (COIL).
This task covers:
c. Removal
a. Testing
b. Repair
d. Installation
INITIAL SETUP
Equipment Condition
Tools
Refrigeration Unit Service Tool Kit
Remove top rear panel (para 4-11).
Appendix B, item 1
General Safety Instructions
Materials/Parts
Solenoid Valve Coil
Tie Down Straps
Do not attempt any disassembly of the solenoid valve
other than coil removal with a refrigerant charge in the
system. Refrigerant will be sprayed out dangerously if
the screws that attach the tube and plunger assembly to
the valve body are loosened.
4-111
