Evacuating of A/C System: Notes
WARNING: This page is about a different car, the 2004 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Do not evacuate before recovering refrigerant in system.
NOTE:
Whenever opened (exposed to atmospheric air), air conditioning system must be evacuated by using a vacuum pump. The A/C system should be attached with a manifold gauge set, and should be evacuated for approximately 15 minutes.
- Connect high charging hose (1) and low charging hose (2) of manifold gauge set (3) respectively as follows:
High charging hose (1) High pressure charging valve (4) on condenser outlet pipe
Low charging hose (2) Low pressure charging valve (5) on suction pipe
- Attach center charging hose (6) of manifold gauge set (3) to vacuum pump (7).
- Operate vacuum pump (7), and then open discharge side valve (Hi) (8) of manifold gauge set (3).
If there is no blockage in the system, there will be an indication on high pressure gauge (9).
In this case, open the other side valve (Lo) (10) of the set and repair the system.
- Approximately 10 minutes later, low pressure gauge (11) should indicate - 100 kPa (-1.0 kg/cm2
, -760 mmHg, -14.7 psi) providing no leakage exists.NOTE:
- If the system does not indicate -100 kPa (-1.0 kg/cm2 , -760 mmHg, -14.7 psi), close both valves, stop vacuum pump and watch movement of low pressure gauge.
- Increase in the gauge reading suggests existence of leakage. In this case, repair the system before continuing its evacuation.
- If the gauge shows a stable reading (suggesting no leakage), continue evacuation.
- Evacuation should be carried out for a total of at least 15 minutes.
- Continue evacuation until low pressure gauge (11) indicates -100 kPa (-1.0 kg/cm2 , -760 mmHg, -14.7 psi) and then close both valves (8), (10).
- Stop vacuum pump (7). Disconnect center charging hose (6) from pump inlet. Now, the system is ready for charging refrigerant.