TM 9-4110-256-14
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 obstructions in the refrigeration system
or equipment damage.
(4)
Check that the system is being purged (para 5-9) and apply sufficient heat uniformly around the joint to
quickly melt the filler alloy. Remove heat and stop purging (para 5-9) as soon as brazing is completed.
5-19