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TM 10-4130-239-14
5-4.
REFRIGERATION SYSTEM SERVICE - PURGING (CONT)
4.
5.
6.
7.
8.
9.
The hose from the suction service port must be connected to the
service manifold.
Open all hand valves on the service manifold.
Open the nitrogen cylinder valve and adjust the regulator so less
than 1-2 cfm (0.028-0.057 m3/minute) of nitrogen flows through
the refrigerant system.
Check discharge from hose attached to the suction service port to
be sure that no oil is being forced out of the system.
Allow nitrogen to sweep through the system at less than 1-2 cfm
(0.028-0.057 m3/minute) for a minimum of 5 minutes before
starting any brazing/debrazing operation (see para 5-5).
Then
allow it to continue at the same rate until all brazing/debrazing
operations are completed.
After brazing/debrazing operations are completed, allow nitrogen
to flow for a minimum of 5 minutes.
Close-all valves.
10. Disconnect the hose from the nitrogen tank.
5-5.
REFRIGERATION SYSTEM SERVICE - BRAZING/DEBRAZING.
This task covers:
Debrazing, Brazing, and Inspection
Equipment
Condition
Para
Condition Description
2-8
Engine stopped.
4-15
Housing removed.
5-4
Service manifold gauges
attached and system
purged.
Tools
Tool Kit, Service
Refrigeration, item
5, Appendix B
5-8
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