Mastercool 69788-A R134a RECOVERY_RECYCLE_RECHARGE - Manual (Page 17)

17
The machine will now fill the machine tank with the preset quantity ±1.1lb ( ≈500g). When the quantity minus 1.1lb (≈500g) is reached, the
machine will stop and display:
TANK CHARGING
Close the external
tank and
PRESS START
Close the tank valve and press START. The machine will stop automatically after having recovered the residual refrigerant from the hoses. Close the
high pressure valve. Disconnect the external tank.
VACUUM PUMP
Perform the operations listed below on a routine basis in order to ensure the best operation of the vacuum pump:
When filling or replacing the pump oil, use only the oil recommended by the manufacturer.
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FIG. 11
OIL FILL - (NEW MACHINE)
This vacuum pump has been tested at the factory and shipped with only trace amounts of oil. OIL MUST BE ADDED BEFORE OPERATING! Failure to
add oil will damage the cartridge and void warranty.
NOTE: Make sure the oil drain valve located below the front casing is closed before attempting to add oil (Fig 11-3.)
1) Disconnect the machine from the electrical supply.
2) Remove the rear cover (6 screws.)
3) Unscrew the oil fill/muffler plug (Fig 11.2.)
4) Oil Bottle: A) Remove oil bottle cap
B) Remove the silver foil
C) Attach the filling top (be sure to remove the red cap) (Fig. 11-5.)
D) Attach the filling hose (Fig. 11-6.)
5.) Slowly add oil until oil level rises to the top of the oil level line. Do not overfill with oil! (Fig 11-4.)
6.) Replace the oil fill/muffler plug (Fig 11.2.)
7.) Re-install the rear cover (6 screws.)
CHECKING OIL LEVEL
The oil level in the sight glass should be between the max and min line (Fig 11-4.) If oil level falls below the MIN line add oil per oil fill instructions.
OIL CHANGE
The vacuum pump oil must be replaced:
1) Every 120 working hours, or
2) When the filter/dryers are replaced, or
3) At the beginning or end of every season, or
4) Whenever the oil changes color due to absorption of moisture.
Before beginning the oil change procedure, obtain an empty 16 oz. (1 pint) or larger container in which to collect the used oil.