MAHLE RTI AC800 - Manual (Page 13)

RTI Technologies, Inc.
October 6, 1999 Page 12
Figure 5 Charge - High Side
CHARGE - HIGH SIDE
To Charge Refrigerant, refer to Figure 5 and follow these steps:
1. Perform Hose Evacuation described previously.
2. Connect Red and Blue Hoses to the A/C System per the vehicle manufacturer's instructions.
3. 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 for setting the AC800 charge indicator.
The following will determine where to set the indicator prior to starting the charge mode:
(AC800 Liquid Level) - (A/C System Capacity) = Indicator Setting
EXAMPLE: The level of liquid visible in the AC800 Charging Cylinder Sight Glass is 7.4 lbs.
and the A/C system capacity is 3.2 lbs. The following calculation results...
(7.4) - (3.2) = 4.2
Therefore, the sliding indicator should be set at 4.2 lbs. in this example. When the
liquid level lowers to the 4.2 lb. mark, a charge of 3.2 lbs. will have been delivered
NOTE: The Sight Glasses on the Charging Cylinders have markings for both R12 and
R134a. Always use the correct scale for accurate charging.