MAHLE RTI RRC770A - Manual (Page 14)

Page 11
CHARGE MODE
Figure 5 - Charge Mode Control Settings
Refer to Figure 5 for the following description of operation:
1. Perform Hose Evacuation Procedure described previously.
2. Connect Red Hose to the A/C System per the vehicle manufacturer's instructions. Do
not open the hose valve.
3. Set Mode Selector to CHARGE.
4. Turn Main Power Switch to RECYCLE position. The Internal Charging Cylinder will
now be heating to develop pressure for charging.
5. Open High Gauge Valve. The Low Gauge Valve and both Hose Valves should be
closed.
6. Determine the refrigerant capacity of the A/C system to be charged. This data is
usually printed on a tag located on the accumulator or under the hood of the vehicle.
Convert this quantity to tenths of a pound or pounds and ounces or Kgs, if necessary,
for setting the RRC770 charge indicator.
The following will determine where to set the indicator prior to starting the charge mode:
(RRC770 Liquid Level) - (A/C System Capacity) = Indicator Setting