TM 9-4120-378-14
5.17 EXPANSION VALVES. - continued
Remarks
Action
Location/Item
Avoid bodily contact with liquid refrig-
erant and avoid inhaling refrigerant
gas. Be especially careful that refrig-
erant does not come in contact with
eyes. In case of refrigerant leaks, ven-
tilate area immediately.
Check that power source is discon-
nected. Check that system is dis-
charged of refrigerant.
When performing brazing/debrazing
operations, wrap valves with wet rags
to act as a heat sink.
NOTE
Replace dehydrator whenever refrig-
erant system is opened.
Primary
Expansion
Valve
a.
Soften mastic bulb in well (1) if necessary, by warm-
Removal
ing with a cloth soaked in hot water and wrung out,
a heat lamp, or equivalent.
Withdraw bulb (2) from well taking care to prevent
b.
damage to capillary tube.
See paragraphs 5.5 and 5.6.
c.
With dry nitrogen flowing through refrigerant sys-
tem, debraze tubing to valve at debrazing point.
d.
Remove expansion valve (3) from unit.
5-53
