MAHLE RTI RHS650 - Manual (Page 8)

Page 7
EVACUATION
Prior to charging the A/C system, air and moisture must be evacuated. Air or moisture in the A/C
system may result in poor performance.
1. Make sure that all valves are closed and then connect the high and low pressure hoses to the
A/C system and open both service hose valves.
2. Read the pressure in the A/C system on the RHS650 gauges. The pressures in the A/C system
must be below 0,2 bar before starting the evacuation procedure. If the pressure is above 0,2 bar,
perform a recovery/recycling procedure as described earlier.
3. Open valves 2 and 3.
4. Set the process selector on EVACUATION and turn on the main switch. The EVACUATION
process should run for several minutes. Note the vacuum level on the vacuum gauge.
5. A Vacuum leak check can now be made. Turn the main switch off and close valve 3. Watch the
vacuum gauge. If the pressure rises, there is a leak or moisture in the A/C system.