MAHLE RTI TC670E User Manual
Page 11
RTI Technologies, Inc.
Page 10
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:
Figure 3 Vacuum
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 DEEP VACUUM.
5.
The Pump will start and the TC670E will start drawing a vacuum which will be indicated by
a dropping pressure on the Low Gauge.
NOTE:
If pressure is sensed at the Red and Blue Hoses on the TC670E, the Vacuum Pump will
not start, as this would result in venting of refrigerant. If this occurs, perform the
recover/recycle operation described earlier.
ALSO:
It is normal for the TC670E to have a 20 to 30 second discharge when the pump is
started.