MAHLE RTI TC640 - Manual (Page 10)

RTI Technologies, Inc.
September 15, 1997 Page 9
Figure 3 Deep Vacuum
VACUUM
If the A/C System is "opened" for replacing components, it is important to draw
a vacuum on the system before recharging with refrigerant. The following
steps should be followed:
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 Low and High Gauge Valves.
3. Open Red and Blue Hose Valves.
4. Press top (ON) of rocker switch marked DEEP VACUUM.
5. The Pump will start and the TC640 will start drawing a vacuum which will
be indicated by a dropping pressure on the Low Gauge.
6. Press bottom (OFF) of rocker switch marked DEEP VACUUM when complete.
NOTE: It is normal for the TC640 to have a 20 to 30 second discharge when
the pump is started.