MAHLE RTI TC2670 - Manual (Page 11)

RTI Technologies, Inc.
September 30, 1999 Page 10 10
Figure 3 Vacuum
VACUUMING
If the A/C System is "opened" for replacing components, a vacuum must be drawn on the system before
recharging with refrigerant. This vacuuming process removes air and moisture introduced into the system.
To 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 R12 POWER.
5. Press top (ON) of rocker switch marked DEEP VACUUM.
6. The Pump will start and the TC2670 will draw a vacuum.
NOTE... If pressure is sensed at the Red and Blue Hoses on the TC2670, the Pump will not start. If
this occurs, perform the recover/recycle operation described earlier. It may also be necessary
to momentarily loosen the Blue Hose to break the vacuum to allow the pump to start if its
operation has been interrupted. It is normal for the TC2670 to have a 20 to 30 second
discharge when the Pump is started.
7. Press bottom (OFF) of rocker switch marked DEEP VACUUM.
8. Press bottom (OFF) of rocker switch marked R12 POWER.