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TM 10-4130-239-14
5-5.
REFRIGERATION SYSTEM SERVICE - BRAZING/DEBRAZING (CONT)
Material/Parts:
Abrasive cloth, item 1, Appendix E
Brazing alloy, item 6, Appendix E
Flux brazing, item 12, Appendix E
Rags, item 23, Appendix E
Solder (silver), item 29, Appendix E
WARNING
Prevent contact of refrigerant gas with flame or
hot surfaces.
Heat causes the refrigerant to
breakdown and form carbonyl chloride (phosgene),
a highly poisonous and corrosive gas.
NOTE
All tubing in the refrigeration, water and fuel
systems is made of copper with a finish that
permits thorough cleaning.
All interconnecting
fittings, such as elbows, tees, etc., are also
copper.
The bodies of all connections on other
components are brass.
The refrigerant, water,
and fuel systems can all be soldered using the
same procedures.
All joints, except those
provided with flare fittings, are made by brazing
according to MIL-B-7883, Type I, Grade B, except
that radiographic examination is not required.
Debraze joints for removal of refrigeration system components as
follows:
WARNING
All refrigerant must be discharged from the
system and the entire system must be purged with
dry nitrogen before beginning any debrazing
operation.
1.
Determine which joints are to be debrazed.
The limited work
space inside the water chiller may make it more convenient to
remove a part of the inter-connecting tubing with the component,
rather than debrazing the joint itself.
2.
Before debrazing a joint on a valve, disassemble the valve as
completely as possible, then wrap all but the joint with a wet
rag for a heat sink.
5-9
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