8. Empty refrigerant oil in the oil separator.
9. Close release valve.
10. Connect the filling machine to the appropriate power outlet.
11. Connect the main power switch.
Note
Do not mix the old refrigerant oil and the new refrigerant oil together. The old oil may have aluminum deposit or
mixed with other foreign matter. Re-fill the air-conditioning system, make sure use the new refrigerant oil. Properly
discard the used refrigerant oil.
Note
Part of the air-conditioning systems 100 PG lubricant may be recycled along with the refrigerant. Filling machine
separates the lubricant and the refrigerant, it can determine the amount of recovered oil. When re-filling system,
add the equivalent weight lubricant. Refer to the manufacturer's manual to learn more about filling machine.
12. Start the recycling process. Refer to the manufacturer's manual to learn more about filling machine.
13. Wait for 5 min, and then check the control panel low pressure gage. If the air-conditioning system maintains the vacuum, then
the recovery is completed.
Note
If the control panel indicator light showing refrigerant can full in the recovery period, and the filling machine is turned
off, then load an empty can, for the refrigerant storage. Do not use other types of refrigerant cans.
14. If the low pressure gage readings increase from zero, it indicates that system still has refrigerant. Recover the remaining
refrigerant. Repeat this step until the system maintains a vacuum 2 min.
Emptying
Refrigerant tank filling machine must be equipped with sufficient amount of R-134a refrigerant for filling. Check refrigerant tank. If
the cooling agent is less than 3.6 kg (8 lb), add new refrigerant to the refrigerant tank. Refer to filling machine instruction manual to
find ways to add refrigerant.
1. Check whether high pressure and low pressure hoses are connected to the air-conditioning system, open the filling machine
Control Panel high pressure and low pressure valves.
2. Open the refrigerant tank air and liquid valves.
Note
Refer to the manufacturer's instruction manual to learn more about filling machine. The system must first be emptied
in order to re-fill new refrigerant or regenerated refrigerant.
3. Start the vacuum pump and start emptying process. In the recycling process, the non-condensed gas (mostly air) automatically
discharges from the tank. You will hear the sound of pressure relief.
Note
Regularly change the vacuum pump oil. Refer to the manufacturer's instruction manual to learn more about filling
machine.
4. Check whether the system leaks. Refer to the manufacturer's instruction manual to learn more about filling machine.
Air-conditioning System Lubricant Filling
Add lubrication oil, as the oil is discharged during the air-conditioning system recovery.
1. Use lubricant with a scale of bottled 100 PG exclusively for R-134a system.
8-40
Automatic Air-conditioning
Heating, Ventilation and A/C System
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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