Mastercool 69300-220 TWIN TURBO REFRIGERANT RECOVERY SYSTEM - Manual (Page 3)

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connected to the unit to be serviced. The outlet hose should be connected to vapor valve on recovery
tank. Recovery tank must be used on a scale that can be set to shut off refrigerant flow when tank
reaches 80% of capacity. Recovery tank must have a minimum pressure rating of 38 bar (550 psi).
5. Open the valve on the unit being serviced (feeding inlet hose).
6. Open the vapor valve on the recovery tank.
7. Turn
INLET valve on Recovery System to OPEN.
8. Turn on Recovery System (push power switch “I”).
9. Observe operation of system. In rare instances “slugging “ may be apparent (loud compressor noise or
high vibration). If this condition is apparent turn inlet valve to
LIQUID position. System can be run with
this setting continuously. It is suggested that operator periodically turn inlet valve to OPEN position and
check for proper operation of system. Best operation of the system is with inlet valve fully OPEN.
10. Recovery is complete when inlet reading is about 380 - 510mm (about 15 - 20”) of mercury vacuum.
Turn inlet valve to close position and turn power switch off. Recovery is complete.
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RECOVERY SYSTEM PURGE
1. Turn off power switch. Turn inlet valve to PURGE position. Turn center valve to PURGE position. Make sure
outlet valve is in OPEN position. Start System.
2. Purge may take a few minutes as some liquid refrigerant may be in the Recovery System. The liquid must
become vapor, which may require some time. System will shut-off automatically when proper vacuum
level is reached.
3. Shut
OFF Recovery System power switch. If system is to be used with the same refrigerant next
operation, shut outlet valve and disconnect outlet hose. If opening of Recovery System is required,
disconnect outlet hose to relieve residual pressure.
4. The inlet port has a fine screen filter. Remove inlet nut and clean or replace filter after every use. A clean
filter is very important for the proper operation of the System.
PUSH – PULL LIQUID RECOVERY METHOD
(Refer to fig. 2)
The push –pull liquid recovery technique permits recovery of large volumes of liquid refrigerant from HVAC
or refrigeration systems. The Recovery System pulls vapor from the recovery cylinder and produces high
pressure vapor that is discharged into vapor service port of system being evacuated. The liquid service port
is connected to liquid inlet on recovery tank.
Note: Recovery tank must be used with a scale that shuts off refrigerant flow when tank reaches 80% of