6
2. Connect the recovery unit, the system to
be serviced, and the recovery tank as
shown in the figure 1.
3. Open the valves on the recovery
cylinder.
4. Turn the
Suction Valve
to “VAPOR
RECOVERY” and the
Discharge Valve
to
“PURGE” position.
5. Turn the
System Switch
“ON.” The
Green LED should energize.
6. Monitor the sight glass. When there is
no longer significant liquid refrigerant
passing through the sight glass,
push-pull liquid recovery is complete.
Note:
If the Yellow LED energizes, the
recovery tank is full.
Turn off power. Turn off both valves.
Exchange recovery tank with an empty
one. Repeat Steps 3-6.
If the Red LED energizes, the recovery unit
is sensing a high-pressure limit. Turn off
power and check for restrictions. If tank
pressure is above 400 psig, exchange tank.
Repeat Steps 3-6.
7. Turn the
Tank Vapor Valve
to “OFF.”
Wait until suction pressure gauge
indicates a vacuum.
8. Perform
PURGE
process.
9. Disconnect Refrigerant hoses.
10.Proceed to the Vapor Recovery
procedure in this manual to remove the
remainder of the refrigerant and to
evacuate the system to the required
vacuum level.
PUSH-PULL LIQUID RECOVERY, cont.
hvac unit
or appliance
liquid service port
(Liquid Recovery mode only)
vapor service port
(Liquid or Vapor Recovery mode)
SUCTION PRESSURE
TO POWER
SUPPLY
DISCHARGE PRESSURE
RECOVER
LIQUID
SUCTION PORT
VAPOR
DISCHARGE PORT
PURGE
Tank Full
BREAKER
CIRCUIT
System On
SWITCH
SUCTION PRESSURE
O
DISCHARGE PRESSURE
O
High Pressure
SYSTEM
recovery
tank
Charging
Scale
liquid(closed)
vapor(open)
Figure 2
