PURGING THE REFRIGERANT SYSTEM.-Continued

TM5-4120-383-14

512.

PURGING THE REFRIGERANT SYSTEM.-Continued

Allow nitrogen to flow through the system at the rate of 1 -

2 cfm (0.028 - 0.057 m3/minute) for a minimum of 5 minutes before

starting any brazing operation, then allow it to continue to flow

at the same rate until all brazing operations are completed.

After installation brazing operations are completed, allow

nitrogen to flow for a minimum of 5 minutes.

Close nitrogen cylinder valve, nitrogen regulator, charging

manifold valve, and both high and low pressure charging valves on

the unit.

Disconnect hose from nitrogen tank.

Assuming that all repairs are completed, go to paragraph

Nitrogen Tank Connection