Charging of the VDOT A/C System

TO BEGIN CHARGING OF THE VDOT A/C SYSTEM
1. Start engine, run until engine reaches operating temperature, set A/C mode control button on "OFF".
2. With the Refrigerant-12 drum inverted, open R-12 source valve(s) and allow 0.454kg (1 lb.) of liquid R-12 to flow into system through low-side service fitting.
3. As soon as 0.454 kg (1 lb.) has been added to system, immediately engage the compressor by setting the A/C control button to NORM and blower speed on HI, to draw in the remainder of the R-12 charge. See specifications for total R-12 charge.

NOTE The charging operation can be speeded up by using a large volume fan to pass air over the condenser. If condenser temperature is maintained below charging cylinder temperature, Refrigerant-12 will enter the system more rapidly.

4. Turn off R-12 source valve and run engine for 30 seconds to clear lines and gages.
5. With the engine running, remove the charging low-side hose adapter from the accumulator service fitting. Unscrew rapidly to avoid excess R-12 escape from system.

CAUTION Never remove a gage line from its adapter when line is connected to A/C system. Always remove the line adapter from the service fitting to disconnect a line. Do not remove charging hose at gage set while attached to service low-side fitting. This will result in complete discharge of system due to the depressed Schrader valve in service low-side fitting and may cause personal injury due to escaping Refrigerant-12.

6. Replace protective cap on service fitting.
7. Turn engine off.
8. Leak check system with electronic leak detector J 29547 or equivalent.
9. Start engine.
10. With system fully charged and leak-checked, continue to operate system.