MasterCool 69000 Instrucciones De Operación página 3

tripped, reset it. Start Recovery System.
9. Once Recovery System has started turn center valve to RECOVER position and INLET valve to OPEN position.
10. 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 OPEN and automatic pressure regulating valve
controlling flow conditions.
11. System has automatic vacuum shut down switch. After recovery is complete system will turn off when inlet pressure
reading is about 14 inches of mercury (-.4 bar) below atmospheric pressure. When system shuts down
automatically, turn inlet valve to CLOSE position and turn power switch off. Proceed to "Recovery System Purge"
section to purge Recovery System of remaining refrigerant.
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. If system does not start due to pressure difference between inlet and outlet, turn
center valve slowly to recover position and slowly back to purge position. The inlet and outlet pressure gauges should
read the same pressure. Start system.
2. System will run until vacuum switch shuts System off automatically. 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. See "Routine Maintenance" section.
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 of 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).
Manifold
W/Sight Glass
5
or
VAPOR
LIQUID
FIGURE 1
RECOVERY
SYSTEM
34
5
34
SUCTION PRESSURE DISCHARGE PRESSURE
CIRCUT
BREAKER
LIQUID
PURGE
CLOSE
POWER
INLET PURGE (START) OUTLET
(Refer to fig. 2)
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VAPOR
VALVE
APPROVED
RECOVERY
TANK
DO NOT fill tank more
than 80% of capacity!
3