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ARMY TM 9-4120-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
4-87. COOL CONTROL THERMOSTAT (S14).
This task covers:
a.
Inspection
b.
Testing
c.
Adjust
d.
Removal
e.
Installation
INITIAL SETUP:
Tools
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Personnel: 1
Material:
Varnish, moisture and fungus resistant (Item 16, Appendix E)
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).
INSPECTION
1.
Remove two screws (9), flat washers (7), lockwashers (8), and cover (6). (See Figure 4-87).
2.
Check that leads are properly connected (see Figure FO-3).
3.
Check that capillary line (18) and sensing bulb (5) are not damaged.
4.
Check thermostat for signs of overheating or other obvious damage. Replace if damaged.
TESTING
1.
Using multimeter, check continuity. Place probes on each set of red and blue terminals, in turn.
2.
At each set, slowly turn dial back and forth slightly to check that switch opens and closes on a very narrow range.
3.
Place probes on each set of red and yellow terminals in turn. Repeat step 2.
4.
Replace thermostat if it fails any of above tests.
ADJUST
NOTE
This temperature adjustment is for single mode of operation.
Set temperature to desired room temperature between 68° and 95°F (20° and 35°C).
REMOVAL
1.
Remove screw (1), flat washer (3), lockwasher (2), and sensing bulb (5).
2.
Remove sensing bulb clamp (4).
3.
Remove screw (16), flat washer (15), lockwasher (17), and clamp (14).
4.
Tag and disconnect leads.
4-170
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