Section 5 The Refrigeration System Operation Procedure - Geely CK Series 2007 Workshop Manual

•
Compared with the early used mineral oil, the SW-100 type compressor oil is of comparatively high
moisture absorption performance. If you mix the moisture object with the SW-100 type compressor oil, it
will damage the Refrigeration system. Therefore, after treating the compressor oil or removing the
refrigeration system components, the lid shall be covered immediately to prevent the SW-100 type
compressor oil from absorbing the moisture.

Section 5 The Refrigeration System Operation Procedure

I. Refill Refrigerant
Notice:
• During the filling of refrigerant into the refrigeration system, be careful that it is required to
have the professionals operate under the specified standard and procedure, otherwise it will
reduce the A/C efficiency greatly and even damage the refrigeration system components.
Refill the HFC-134a refrigerant
Refill Preparation
1. Install the inflating equipment.
2. Connect the low pressure tube to the low pressure
refill valve.
3. Connect the high pressure tube to the high pressure
refill valve.
4. Connect the intermediate tube to the vacuum pump.
Vacuumization:
1. Open all valves.
Notice:
• Close all valves of the manifold gauge immediately after the vacuum pump stops operation. If
the valve is still open after the vacuum pump stops operation, then the vacuum pump oil will
return to refrigerant circulation loop and reduce the A/C efficiency.
2. Start the vacuum pump and run it for 15min.
3. Check if the readings at high and low sides of the manifold gauge fall within the range of -101 kPa{-760
mmHg }. Close the valves of the manifold gauge.
Check the air tightness:
1. Stop the vacuum pump and have it wait for 5min.
2. Check the high pressure side of the manifold gauge and the reading at the low pressure side.
•
Check for leakage if the reading changes and vacuumize it again.
•
Refill the new HRC-134a refrigerant if the reading doesn't change.
To low pressure fill valve
Low Pressure Gauge
Low Pressure Tube
Low Pressure
Manual Valve
Vacuum Pump
Connect the high
pressure refill valve
High Pressure
Gauge
High Pressure Tube
High Pressure
Manual Valve
Intermediate Tube
Refrigerant Steel Jar
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