Specifications

11
LIQUID RECOVERY
P
ROCEDURES
STEPS:
Liquid push-pull operations are performed by using hot compressor gas to push liquid refrigerant out
of a system. The purge valve accomplishes this by re-directing the hot compressor gas around the
condenser. See the diagram on top of the unit for hose connections.
1. Turn off all electrical or mechanical power to the refrigerant device to be evacuated.
2. Make proper hose connections. Connect the discharge hose from the outlet port to the low-
pressure side of the system you are servicing. Connect a hose between the liquid port (receiver
or condenser) on the system being serviced and the liquid valve on the DOT recovery tank.
Connect the inlet hose from the DOT recovery tank vapor valve and the unit’s inlet port. See
Figure 3 for hose connection schematic.
NOTE: You must use an external filter drier in the suction line in order to meet the conditions of
the unit warranty. Caution: If the 80% shutoff cord is not used, a scale must be used to monitor
the refrigerant level in the recovery cylinder.
3. Place the inlet and purge valves in the “LIQUID PUSH-PULL” position. This will allow hot
compressor gas to bypass the condenser. OPEN the liquid and vapor valves on the tank, (See
Figure 4)
4. Open the outlet ball valve and the DOT recovery tank vapor and liquid valves on the DOT
recovery tank.
5. Turn the system switch to the “ON” position. When all liquid refrigerant is recovered, turn the
system switch to the “OFF” position. NOTE: Liquid push-pull operations do not pull a vacuum on
a system. You must perform a vapor recovery operation in order to pull the system down to the
required vacuum level.
6. Monitor the LED status display.
GREED LED
SYSTEM ON
The “SYSTEM ON” indicator should be ON during normal
operations.
NO LED
EVACUATION
COMPLETE
Indicates that the unit has shut down because the system being
evacuated has reached 13" HG. (the evacuation is complete).
During liquid push-pull operations the system will not be pulled into
a vacuum. NOTE: A small amount of inlet pressure might be
needed to reset the vacuum switch, this is normal.
RED LED
HIGH PRESSURE
Indicates that there is a high pressure condition that must be
corrected. Check for restrictions or a full recovery cylinder. Correct
problem and turn system switch to the OFF position. Repeat steps
3-6.
RED LED TANK
FULL
Indicates that the recovery cylinder is full (if the 80% Automatic
Tank Full Shutoff Option is installed). Change the recovery cylinder
and repeat steps 3-6.
7. Turn the system switch to the OFF position when all liquid is recovered. The liquid recovery
operation is complete when the scale or optional sight glass indicates no liquid is being transferred to
the recovery cylinder. NOTE: The Fluoromizer must be manually shut off during all liquid recovery
operations.
8. Proceed to vapor recovery operations to complete the recovery operation. If the Fluoromizer is
manually or automatically turned off before the liquid recovery is complete, repeat steps 3-8. NOTE:
If the circuit breaker trips, wait 10 seconds, reset circuit breaker and go to step 2. If the compressor
thermal overload trips, wait 16 to 30 minutes before restarting.