INFICON Vortex AC Refrigerant Recovery Machine 115V - Manual (Page 10)

8
Vortex AC Operating Manual
3.3 PURGING the Vortex AC
1
Rotate the PURGE/RECOVER valve (V2) to the PURGE position. Rotate
valve V3 to OPEN. See
Figure 3-2 .
2
Switch the POWER ON and rotate the INLET valve (V1) slowly to the
PURGE. Prevent flooding the compressor with liquid, do not rotate the V1
valve quickly.
3
Observe the LP Gauge and continue to run the unit until a VACUUM of at
least 20 In/Hg is achieved. Switch the POWER OFF and immediately
CLOSE the Recovery Tank’s valve. The INLET valve (V1) should be
returned to the CLOSE position. Finally close V3.
4
IMPORTANT — RETURN V2 TO RECOVERY POSITION
THE HOSE AND THE DISCHARGE PORT WILL CONTAIN A SMALL
AMOUNT OF REFRIGERANT UNDER PRESSURE. EXERCISE CARE
WHEN REMOVING THIS HOSE AND OPENING THE VALVE V3.
Figure 3-2 Setup Procedure for Purging
3.4 Push-Pull Operation
The PUSH PULL method is used to move a large amount of liquid refrigerant
from the system being serviced to the recovery tank without passing it through
the compressor. This method is only useful when more than 15 pounds of
liquid is known to be in the system and it can be easily isolated. DO NOT
ATTEMPT the PUSH PULL process unless you are sure of the situation.
Connect the refrigerant hoses as shown in
Figure 3-3 . The addition of a
SIGHT GLASS in the line from the system being serviced to the recovery tank
is an important aid to determine when the liquid has been transferred and
vapor remains.