Robinair 34788-I Recovery, Recycling, Recharging Unit - Manual (Page 13)

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539602 Rev. H June 11, 2013
Operating Instructions
Replenish A/C System Oil
Oil may be replenished through the high side after the
vacuum function, or with an oil inject tool after charging
the vehicle.
CAUTION: To prevent damage to equipment,
• Use only NEW oil to replace the oil removed
during the recycling process.
• Charge only the amount of oil that was removed
from the A/C system during the recovery
process. If no oil was removed from the A/C
system during recovery, DO NOT charge any oil
into the A/C system.
Empty the oil drain bottle before recovering an A/C
system to prevent an inaccurate oil charge.
1. Refer to the vehicle service manual, or the optional
vehicle reference database card, to determine the
correct oil for the A/C system being serviced.
2. Check the oil drain bottle to determine the amount of
oil that was removed. See Figure 7.
3. Adjust the o-ring around the oil injector bottle to the
required oil charge level.
For example, if the bottle’s oil level is at 4 ounces,
and you need 1/2 ounce of oil to replenish the A/C
system, place the o-ring at the 3-1/2 ounce level.
4. Attach the oil injector bottle to the unit.
5. Press the button. The unit looks for pressure in
the hoses, and temporarily displays EQUALIZING
PRESSURE.
6. When prompted, press and hold the button until the
oil level in the oil injector bottle reaches the o-ring.
7. Press after the oil inject is complete to recharge the
system with refrigerant. The display will prompt into
the charge mode. (Charge mode after injecting oil
will allow only a high-side charge.)
Note: You must recharge the A/C system with
refrigerant at this time to ensure all the oil is delivered.
Figure 7
Oil Injector
Bottle
Oil Drain Bottle
O-ring