5.6 BRAZING/DEBRAZE PROCEDURE.
THIS TASK COVERS
Brazing alloys and flux contain materials which are hazardous to health. Avoid
breathing vapors or fumes from brazing operations. Perform operations only in
well ventilated areas. Wash hands with soap and water after handling brazing
alloys and flux. Wear gloves and protective goggles or face shield to protect
(2) Protect wiring harnesses and other components with appropriate heat shields.
It may be easier to access a component by cutting or debrazing the copper lines in
accessible areas and removing part of the interconnecting tubing with the
(3) If debrazing a joint on a valve, disassemble the valve to the extent possible and wrap all but the joint with
wet rag to act as a heat sink.
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 removed and recovered from the system and the entire system
must be purged with dry nitrogen before beginning any brazing operation.
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.
(4) Check that the system is being purged per paragraph 5.5 and apply sufficient heat uniformly around the
joint to quickly melt the filler alloy. Remove heat as soon as the joint is separated.