TM 9-4110-255-14
5-12. BRAZING/DEBRAZING PROCEDURE . - Continued
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 5-11) 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.
5-20
