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 TM 9-4120-430-14
0063 00
WARNING
Ensure power source is disconnected.
TEST
1.
Check all piping and connections with a General Electric Type H-2 halogen test detector (or approved equal).
2.
Calibrate the detector with a General Electric LS-20 leak standard (or approved equal) for a pure refrigerant leak
rate of 0.1 ounce (2.8349 gms) per year.
3.
Replace any piping or connection that is leaking beyond the rate of 0.1 ounce (2.8349 gms) per year.
REMOVAL
1.
Debraze and remove tubing only when necessary to remove a defective part.
2.
When brazing, constantly purge the refrigerant system with dry nitrogen to prevent scale formation within the
refrigerant system (see WP 0046 00).
INSTALLATION
1.
Braze all copper-to-copper joints with silver solder (Item 21, Table 1, WP 0069 00).
2.
Braze all copper-to-brass or copper-to-steel with silver solder.
3.
Braze melting point is 1160 degrees F (625 degrees C).
4.
Make all braze joints with an atmosphere of inert gas to prevent internal oxidation (see WP 0046 00).
5.
Replace filter-drier prior to leak testing (see WP 0051 00).
6.
Service refrigeration system after repairs (see WP 0044 00 through WP 0050 00).
7.
Secure top cover (see WP 0018 00).
0063 00-2
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