MAHLE RTI TC670RR User Manual
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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 Vacuum the A/C System, refer to the above illustration and follow these steps:
1. Connect the Red and Blue Hoses to the High and Low sides of the A/C System.
2. Open the Low and High Gauge Valves.
3. Open the Red and Blue Hose Valves.
4. Press the top (ON) of the rocker switch marked POWER.
5. Press the top (ON) of the rocker switch marked DEEP VACUUM-SELF EVAC.
6. The Pump will start and the TC670RR 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 TC670RR, the
pump will not start, as this would result in venting of refrigerant. If this
occurs, perform the Recycle operation described earlier.
NOTE:
It is normal for the TC670RR to have a 20 to 30 second discharge when
the pump is started.
4. Press the bottom (OFF) of the rocker switch marked DEEP VACUUM-SELF EVAC.
5. Press the bottom (OFF) of the rocker switch marked POWER.
6. Close the High and Low Gauge Valves.