TM 9-4120-385-14
WARNING
Prevent contact of refrigerant gas with flame or hot metal surfaces.
Heat causes the refrigerant to break down and form carbonyl
chloride (phosgene), a highly toxic and corrosive gas. In case of
refrigerant leaks, ventilate area immediately.
WARNING
Wear rubber gloves to prevent acid burns when handling sludge
from a burned out compressor.
NOTE
When a hermetically sealed motor burns out, the stator winding
decomposes forming carbon, water and acid which contaminate the
refrigerant system. These contaminants must be thoroughly
removed from the system to prevent repeated motor failures. Motor
burnout may also cause damage to the air conditioner electrical
system. The following cleanup procedures must be followed in case
of compressor motor burnout.
NOTE
Simple failure without motor burnout does not require extensive
cleaning of the entire refrigerant system.
1.
Release refrigerant from the system. Refer to Paragraph 5-5.
2.
Remove burned out compressor. Refer to subparagraph g.
3.
Connect hose from high pressure service valve to a bucket to collect
contaminants. Connect a hose from a cylinder of R11 directly to the low pressure (suction)
service valve. See Figure 5-10.
4.
Fabricate jumper tubing to connect discharge and suction lines that were
previously disconnected when compressor was removed from the unit.
5.
Remove dehydrator. Refer to paragraph 5-22.
Fabricate jumper line to replace dehydrator.
6.
Slowly open the high pressure service valve.
7.
8.
Open the low pressure (suction) service valve.
5-38
