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TM 9-4110-257-14
NOTE
If interconnecting tubing was removed with a component, braze tubing to
the new components before installation.
(3) Position component or assembly into place.
WARNING
Never use a heating torch on any part that contains refrigerant. Heat
may cause the refrigerant to decompose and release irritating, toxic, and
corrosive gases. All refrigerant must be discharged from the system and
the entire system must be purged with dry nitrogen before beginning any
brazing operation.
CAUTION
•
If heat is applied slowly, or only on one side, the entire component
or length of tubing will be heated and filler alloy in adjacent joints
may also be melted.
•
Brazing a joint without nitrogen flowing through the tubing, will cause
deposits to form on the inside of the tube and may cause
obstructions in the refrigeration system or equipment damage.
(4) Check that the system is being purged (para. 5-8) and apply sufficient heat uniformly around the joint to quickly
melt the filler alloy. Remove heat and stop purging as soon as brazing is completed.
5-17
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