TM
9-4120-401-14
5 - 2 3 . EVAPORATOR COIL. - continued
NOTE
FOLLOW-ON MAINTENANCE:
Install heater elements (para 4-45).
Install mist eliminator (para 4-20)
Install supply air louver (para 4-19).
Install new refrigerant desiccant dehydrator (para 5-22).
5-24. EXPANSION VALVE.
Replace
This task covers:
INITIAL SETUP
Equipment Condition
Tools
Refrigeration Unit Service Tool Kit
Appendix B, item 1
Materials/Parts
Use disconnect switch (NOT POWER
CABLE) to disconnect power to unit.
Expansion Valve
Damage to cable connector pins will
result if cable is used.
Tiedown Straps
Disconnect power from power source.
Insulation Tape
Appendix E, item 18
Remove refrigerant desiccant dehydrator (para 5-22).
Lock Washers (2)
Purge refrigerant system (para 5-13).
Replace.
(1) Remove two screws (1) and lock washers (2). Remove locking plate (3).
(2) Unwrap insulation from thermal bulb (4).
(3) Cut plastic tiedown strap (5) holding capillary tubing coil to tubing.
(4) Loosen hardware in thermal bulb clamp (6) and slip bulb (4) out of clamp.
(5) Debraze tube connections (7) and (8) from expansion valve (9). (See paragraph 5-14.)
(6) Remove valve (9) and tubing from unit.
5-59
