oREFRIGERATION SYSTEM SERVICING -(BRAZING/DEBRAZING). - continued

TM 5-4120-386-14

5-12. REFRIGERATION SYSTEM SE RVICING - (BRAZING/DEBRAZING)- Continued.

LOCATION/ITEM

REMARKS

ACTION

( 3 ) Protect insulation,

wiring harnesses,

cabinet, and other

surrounding components

with appropriate shields.

(4) Be sure the work area is

well ventilated and that

dry nitrogen is flowing

through the refrigeration

system at a rate of less

than 1-2 cfm

(0.028-0.057

m 3/ m i n u t e . )

( 5 ) Apply sufficient heat

uniformly around the

joint to quickly melt the

filler alloy. 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. Remove heat as

soon as the joint

separates.

Cleaning debrazed joints. All

filler alloy must be cleaned

from debrazed joints before

reassembly. Heat each piece

of the joint until the filler

alloy is melted and then wipe

it away with a dry cloth. Be

sure no filler alloy or other

debris are left inside any

tubing, fitting or component.

5-40