JAVAC EVO-OS User Manual page 8

SET-UP PROCEDURE FOR NORMAL REFRIGERANT RECOVERY
3.2.2 Switch off the power to the unit being serviced. If the power switch is in a remote
location, LOCK it out so that no one will accidentally turn it back on.
3.2.3 Make sure that the discharge hose from the EVO-OS to the Recovery Cylinder is
attached to the LIQUID PORT. If cylinder contains refrigerant, partially open liquid
valve and purge hose from EVO-OS discharge port end. If cylinder is empty and pre –
evacuated, refer to section 3.2.4.4 and use incoming refrigerant to purge discharge
hose from cylinder port end. Open cylinder liquid valve fully after purging hose.
3.2.4 Set the EVO-OS for RECOVERY.
3.2.4.1 OPEN DISCHARGE valve (V3) to its fully open position.
3.2.4.2 SET PURGE/RECOVERY valve (V2) to RECOVERY position.
3.2.4.3 Open the Manifold Gauge VAPOUR valve slowly and verify that no leaks are
present. Open vapour valve fully and partially open liquid valve. Do not attempt to
recover 100% liquid
3.2.4.4 At this point use incoming refrigerant to purge hose.
3.2.5 Switch ON the EVO-OS and verify that the compressor is operating and cooling air is
exhausting from the back of the machine.
3.2.6 MONITOR the inlet pressure (LP, Low Pressure Gauge) and SLOWLY OPEN the
EVO-OS's INLET valve (V1) fully. If the compressor 'knocks' shut V1 immediately,
then close manifold liquid valve. Open V1 while the machine is running and continue
to recover in vapour phase.
3.2.7 Continue to operate until the required VACUUM has been pulled on the system (refer
to Section 8.0 of this Manual), as indicated by the LP gauge. Switch OFF the EVO-
OS, CLOSE the INLET (V1), and wait for 5 minutes. If the Pressure in the system, as
indicated on the Manifold Gauge, rises above 0 Kpa, refrigerant is still present. If so,
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