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 TM 5-4120-374-13
5-9. REFRIGERANT PIPING AND SERVICE VALVES (CONT)
ACTION
REMARKS
LOCATION/lTEM
Avoid bodily contact with liquid refrigerant and avoid inhaling refrigerant gas.
Be especially careful that refrigerant does not come in contact with eyes.
In case of refrigerant leaks, ventilate area immediately.
16. Refrigerant Piping a. Check all piping and connections with a General Electric
Type H-2 Halogen Test Detector (or approved equal).
b. Calibrate the detector with a General Electric LS-20 leak
standard (or approved equal) for a pure refrigerant leak
rate of 0.1 ounce per year.
c. Replace any piping or connection that is leaking.
17. Refrigerant Piping
a. Solder all copper-to-copper joints with silver solder type 3,
4 or 6A per specification QQ-S-561.
b. Solder all copper-to-brass or copper-to-steel with type 4 or
6A per specification QQ-S-561.
c. Solder melting point is 1160F(625C).
d. Make all solder joints with an atmosphere of inert gas to
prevent internal oxidation.
18. Service Valves
a. Connect suction and discharge service valves to refrigerant
piping.
b. Tighten flare nuts at suction and discharge service valves.
c. Secure suction and discharge service valves to bulkhead
with four (4) screws.
FRONT OF HOUSING
19. Front Panel
a.
Align holes in thermostat switch with holes in front panel.
b.
Secure thermostat to front panel with two (2) screws.
c.
Align holes in front panel with holes in housing.
d.
Secure front panel with fourteen (14) screws.
5-18
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