HEXA

HVAC

B. FLUSHING OF AC SYSTEM

Whenever there is an AC compressor failure the AC

system should be flushed. This is done in order to

remove the debris of the AC compressor that might

have circulated through the system.

The compressor used in this vehicle is a scroll type

which does not have any parts rubbing against each

other as compared to a reciprocating compressor.

However it being the only moving component in the

system, when it fails internal part might get circulated

throughout the system.

Flushing can be either done using an inverted de-

canting R134a cylinder filled with refrigerant. In some

recovering devices a flushing port is provided.

NOTE



If a compressor is replaced without flushing,

de-

bris would circulate throughout the system.

Hence all the components should be flushed.



Flushing also removes excess oil from the sys-

tem. If you suspect the system contains too much

oil, flushing is a way to start fresh so you can es-

tablish the correct quantity of refrigerant oil in the

system.

Following points should be noted while per-

forming a flushing process

1. Flush individual components.

2. Self made flushing fitments will be required as AC

system component fittings all differ in size, shape

and thread size.

3. When replacing air conditioning parts with new

ones, it is necessary to replenish oil by approxi-

mately the same amount which was left in each

part.

4. Reverse flush the components.

5. Do not flush through a compressor otherwise

possible internal damage could occur.

6. Recycle the refrigerant recovered during flushing;

the recovery device will remove contaminants

through a filtration system.

NOTE

Be sure to use specified compressor oil only