ARMY TM 9-4120-380-14
NAVY EE-000-BA-MMA-010 7053-AC
AIR FORCE TO 35E9-136-21
5.30 EXPANSION VALVE (V5) PRIMARY).- This task covers inspection, adjustment, removal, disassembly,
repair/replace, reassembly and installation.
INITIAL SETUP
Tools:
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Thermometer, digital (Item 19, Appendix B)
Thermocouple (Item 20, Appendix B)
Personnel:
1
Materials
Sealant tape (Item 10, Appendix E)
Brazing alloy, silver (Item 21, Appendix E)
Equipment Conditions:
Disconnect input power to the air conditioner before performing any internal
maintenance. Voltages used can KILL.. Shutting the wilt off at the control panel
does not disconnect unit power.
(1)
Disconnect air conditioner input power at source; and
(2)
Remove return air filter (paragraph 4.26).
INSPECTION
a.
Inspect for evidence of leaks, damaged capillary line, and loose or missing mounting hardware (see fig. 5-21).
b.
Check thermal bulb to see that it is securely clamped to the suction line.
c.
If a leak is suspected or indicated, test per paragraph 5 13.
ADJUSTMENT
NOTE
The expansion valve as supplied with unit is preset at the factory. This valve
should not be adjusted unnecessarily.
a.
Perform a refrigerant pressure check on unit in accordance with paragraph 5.16. Leave service manifold attached.
b.
Attach an accurate thermocouple to an exposed surface of the suction return line adjacent to the sensing bulb
5-64
