Compressors

1. Repair of car air conditioning or installation of car air conditioning parts should only be carried out by certified and trained mechanics.
2. To remove or install a compressor, refer to the appropriate official vehicle repair manual.
3. When handling and disposing of refrigerant, always follow local government regulations.
4. To recover or charge refrigerant from the A/C system, use certified equipment.
5. To keep dirt and moisture out of the system, cap the open fittings immediately when disconnecting hoses or other parts.
6. When tightening bolts and nuts always use the correct tightening torque according to the vehicle specifications.
7. Always replace those parts referred to in the parts replacement table. For the correct conditions refer to repair procedures.
8. Only use the compressor oil as indicated on the identification label of the compressor.
9. When cleaning of the A/C system is required, use appropriate flushing equipment. For flushing conditions refer to ‘Refrigerant Cycle Flushing’.
10. After installation it is important to follow the recommended run in procedure. For details refer to ‘Run in Procedure’.

The long lifetime of a compressor is only guaranteed when the correct amount of PowerEdge recommended oil has been used. If contaminated by foreign oil or additives, such as the wrong or too much UV dye, the refrigerant cycle must be flushed before new parts are installed.

In case of leak stop, imitation refrigerants or severe contamination are present, flushing is no longer sufficient and the complete A/C system must be replaced.

When flushing the refrigerant cycle, we recommend the use of dedicated flushing equipment and the correct type of refrigerant. The use of an A/C service station is not recommended.

Conditions for flushing are:

1. Too much or wrong oil type.
2. Too much or not approved UV leak dye.
3. Unclear how much oil remains in the refrigerant cycle.
4. Oil additives (in case of leak stop flushing is NOT possible). All parts need to be replaced!
5. Dirt in the refrigerant cycle, such as black residue. (In case of severe contamination flushing is not possible and all parts need to be replaced)

Always check the car manufacturer data if the oil quantity from the new compressor needs to be adjusted.

WHEN TO REMOVE OIL:

Refer to the conditions as described under repair procedure 1.

WHEN TO ADJUST OIL:

For some applications it is necessary to adjust the oil quantity when:

a) The same compressor part number is used for vehicles with single and dual evaporator cycles.

b) The compressor oil quantity differs from the car manufacturer data (see compressor identification label).

c) Following the required repair procedure 1, 2, 3 or 4.

Never add oil directly into the compressor. When applicable always add the oil in the condenser, receiver dryer or second evaporator cycle.

To recognise which type of oil to use check the compressor identification label, either attached to the rear or side of the compressor.

WARNING:

Only use the original type of oil and never mix with other types or universal type oil. Mixing with other oils or using universal oil will
reduce the lifetime of a compressor and can cause severe damage.
When using other types of oils than specified, warranty is void.

After installation of a new compressor it is important to follow the run in procedure described below. The purpose is to distribute compressor oil and start up lubrication in order to prevent damage directly after new installation.

1. Set temperature to max cool.
2. Switch blower to max speed.
3. Start engine and keep engine rpm at idle.
4. Switch A/C on for a minimum of 5 minutes. DO NOT INCREASE ENGINE SPEED!
5. After 5 minutes all compressor oil, originally stored in the compressor, is transported through the system. Now it is safe to increase engine speed and test A/C.

To determine which repair procedure is applicable, first check the cleanliness of the refrigerant cycle. After removal of the old compressor check the suction port, discharge port, appearance of the old oil and discharge hose. Depending on the situation found, refer to relevant procedure from PowerEdge Compressor Installation Guide (soon available).