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 TM 5-4120-393-14
5-10. Purging Refrigerant System (cont)
k.
After brazing operations are completed, allow nitrogen to flow for a minimum of 5 minutes.
I.
Close nitrogen cylinder valve, nitrogen regulator, charging manifold valve, and both high and low pressure service
valves on the unit.
m. Disconnect the hose from the nitrogen tank.
n.
Assuming that all repairs are completed, go to Leak Testing the Refrigerant System, para 5-12.
5-21
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