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 TM 5-4120-386-14
5-19. EXPANSION VALVES - Continued.
REMARKS
LOCATION/ITEM
ACTION
Individuals who have chronic or
recurrent respiratory conditions,
including allergies and asthma,
should not be employed in this
environment.
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., venti-
late area immediately.
Check that power source is discon-
nected. Check that system is
discharged of refrigerant.
When performing brazing/debrazing
operations, wrap valves with wet
rags to act as a heat sink.
Removal
1. Primary
Expansion
Soften mastic in bulb well (4)
Valve
a.
if necessary, by warming with a
cloth soaked in hot water and
wrung out, a heat lamp, or
equivalent.
b. Withdraw bulb (3) from well
taking care to prevent
damage to capillary tube.
c. With dry nitrogen flowing
See Para. 5-11
through refrigerant system,
and 5-12.
debraze tubing to valve (2) at
debrazing point.
d. Remove expansion valve (2) from
unit.
5-65
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