MasterCool TwinTurbo 69300 Instrucciones De Operación página 3

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.
AIR CONDITIONING
REFRIGERATION SYSTEM
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
The push –pull liquid recovery technique permits recovery of large volumes of liquid refrigerant from HVAC or refrig-
eration 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 its capacity.
When the Recovery System is started vapor from the recovery tank is compressed and sent, at high pressure, to HVAC or
refrigeration system. As pressure builds, the liquid is "pushed" out of unit into recovery tank. Vapor from recovery tank is
"pulled" out of recovery tank, compressed, and then pressurizes unit.
Note: Some systems may not have liquid service port. This prevents the push-pull technique from being used.
Procedure for Push-Pull technique (Connect system per fig. 2 and following instructions).
1. Connect outlet port of Recovery System to vapor port of unit to be serviced. Use hoses with automatic or manual valves
on both ends to prevent refrigerant release when disconnecting.
2. Connect liquid port on unit to be serviced to liquid port on recovery tank. Recovery tank should be on a scale that stops
flow when 80% tank capacity is reached. This connection should be made with a manifold gauge set with sight glass
to verify liquid flow. Recovery tank must have a minimum pressure rating of 38 bar (550 psi).
3. Connect vapor port of recovery tank to inlet port of Recovery System. Use hose with automatic or manual valve on both
ends.
Manifold
W/Sight Glass
5
or
VAPOR
LIQUID
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FIGURE 1
RECOVERY
SYSTEM
34
RESET
OFF
(Refer to fig. 2)
VAPOR
VALVE
APPROVED
RECOVERY
TANK
DO NOT fill tank more
than 80% of capacity!
3