INFICON Vortex AC Refrigerant Recovery Machine 115V - Manual (Page 11)

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Vortex AC Operating Manual
This process uses the PULL from the exhausted recovery tank and the
Discharge PUSH from the Vortex AC to move the liquid refrigerant. Rates in
excess of 15 pounds per minute can be achieved by this procedure.
The SCALE is required in this process to ensure that the tank is not overfilled.
The tank shutoff switch, if used, would stop the compressor but could not
guarantee that additional refrigerant flow would cease because of the
dynamics of the system, thus possibly overfilling the tank.
Figure 3-3 Setup Procedure for Push-Pull Method
3.5 Cooling The Recovery Tank
The Vortex AC can be used to PRE-cool (or SUB-cool) the recovery tank if the
head pressure is too high to complete the recovery process. This can occur
when working with certain refrigerants with a high vapor pressure when the
ambient temperature is high.
If the recovery process stalls out because of high head pressure, stop the
Vortex AC, shut off the hose valves and reconfigure the setup as shown in
Figure 3-4 . This can also be done before starting the recovery process, but it
may have marginal long term effect.
NOTE:
This will only work if there is at least 5 pounds of liquid in the
recovery tank to develop the necessary pressure differential
required.