MAHLE RTI RRC770 User Manual
Page 10
RTI Technologies, Inc.
9
September 28, 1999
Page 9
Figure 3 Deep Vacuum
DEEP VACUUM
If the A/C System is "opened" for replacing components, a deep vacuum must be
drawn on the system before recharging with refrigerant. This vacuuming
process removes air and moisture introduced into the system. A Vacuum Pump
mounted on the lower rear shelf of the RRC770 provides this capability.
To Deep Vacuum the A/C System, refer to Figure 3 and follow these steps:
1. Connect Red and Blue Hoses to the high and low sides of the A/C System.
2. Open Red and Blue Hose Valves.
3. Press top (ON) of rocker switch marked POWER ON/TEST.
4. Press top (ON) of rocker switch marked DEEP VACUUM.
5. The Vacuum Pump will start and the RRC770 will draw a vacuum.
NOTE...
If pressure is sensed at the Red and Blue Hoses on the RRC770, the
Vacuum Pump will not start. If this occurs, perform the
recover/recycle operation described earlier.
6. Press bottom (OFF) of rocker switch marked DEEP VACUUM.
7. Press bottom (OFF) of rocker switch marked POWER ON/TEST.