Chery QQ, Service Manual

Page: 422 / 635

Chery QQ Service Manual
Section 7 Recovery, Evacuation and Charge
I. Recovery of refrigerant
Refrigerant recovery unit must be used when the refrigerant for air conditioning is
discharged. Directly discharging refrigerant into atmosphere will bring harmful effects
on environment.
Note: when using recovery unit, you must follow the operating instruction of the
device.
II. Evacuation
（
1
）
air conditioning system must be evacuated with the vacuum pump whenever its
joints are disconnected (exposed to air ). The air conditioning system should be
connected to manifold pressure meter and it will take about 15 mins to evacuate air.
Note:
Do not evacuate air conditioning before refrigerant is recovered.
（
2
）
connect the high/low pressure charge hoses for manifold pressure meter
respectively as described in the following.
High pressure charge hose—discharging hose of the compressor
Low pressure charge hose—intaking hose of the compressor
（
3
）
center charge hose of the manifole pressure meter is connected to vacuum pump.
（
4
）
start the vacuum pump, then switch on the manual valve at the intaking side of
manifold pressure meter
（
Lo
）
.
If the system is not blocked, there is indication on high-pressure meter.
When the indicator lights, switch on the manual valve at the other side
（
Hi
）
.
（
5
）
if there is no leakage for about 10 mins, the low-pressure meter will indicate the
vacuum pressure is lower than 760mmHg.
Note:
If vacuum is higher than 760mmHg, the manual valves should be turned off, the
vacuum pump is stopped and the pointer swaying of low-pressure meter should be
Chery Automobile Co.,Ltd
138