Secction XIX: MAINTENANCE OF REFRIGERATION SYSTEM

TM 5-4120-352-14

rect the trouble, report the conditioner to direct sup-

c. Follow procedure given in paragraph 4-37 and

port maintenance.

test motor.

e. Install terminal box cover and scrrews. Con-

d. If any difficulty is indicated, remove screws

nect electrical connector. Refer to figure 4-5 and in-

and terminal box cover and check for damaged wir-

ing or loose connections. Repair damaged wiring

stall housing rear top cover.

and tighten loose connections. If this does not cor-

MAINTENANCE OF REFRIGERATION SYSTEM

Section XIX.

drator and receiver for damage.

4-50. General.

e. Tubing and Fittings. Inspect tubing for

Organizational maintenance of the refrigeration

kinks, cracks or other damage. Inspect fittings for

system is limited to inspection and testing of the

cracks.

system. Remove top covers, louvers and partially

remove junction box as required to gain access to all

parts of the system. Report any deficiencies to di-

4 - 5 2 . Testing System for Leaks.

rect support maintenance.

Check all piping, components, and connections of

the refrigerant system with a General Electric Type

H-2 Halogen Test Detector unit (or approved equal).

4-51. Inspection.

The detector shall be calibrated with a General

u. Valves. Inspect charging valves, solenoid

Electric LS-20 leak standard (or approved equal for

valves, expansion valves, pressure relief valves and

a pure refrigerant leak rate of 0.1 ounce per year.

pressure regulating valves for cracks or damaged

Any detected leaks exceeding this rate shall be re-

condition. Inspect capillary tubes for kinks or

ported immediately to direct support maintenance

breaks. Disconnect solenoid valve electrical con-

for correction and recharging,

nectors and check for coil continuity between termi-

nals.

b. Coils. Inspect condenser and evaporator coils

Avoid bodily contact with liquid re-

for bent or broken fins and for damaged con-

frigerant and avoid inhaling refrig-

nections.

erant gas. Be especially careful that

c. Louver Control Actuator. Inspect cylinder

refrigerant does not come in contact

for cracks and damaged connections. Inspect control

with the eyes. In case of refrigerant

for bent or broken conditions.

leaks, ventilate area immediately.

d. Dehydrator and Receiver. Inspect dehy -

4-44