Draining And Filling Refrigerant R1234YF: Notes

NOTIFICATION 

Excessively high pressure in refrigerant circuit 

• Risk of damage to air-conditioning compressor 

  → Do not allow low-pressure gauge to go above 3 bar.

Information 

• On air-conditioning service equipment with a transparent oil separator, read off and take note of the oil level before removing refrigerant. 
• Do not carry out this step on empty air-conditioning systems (pressure gauge approx. 0 bar) because if you do, air will get into the refrigerant bottle. 
• If the vehicle is cold, it may be necessary to repeat the suction procedure until all refrigerant has been removed from the air-conditioning system. This step is carried out automatically with some units. 

1. Fit filling adapter -1-  .

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Service connections for refrigerant

   1. 1.1 Screw off protection caps on the filling valves.
   2. 1.2 Extract any refrigerant remaining in the filling lines.
   3. 1.3 Connect filling adapter -1-  to the high-pressure and low-pressure filling lines.
   4. 1.4 Leave the engine running for a short time with the air conditioning on and open the valves on the filling adapter -1-  .

   Information 

   • Instructions in the operating instructions for the air-conditioning servicing equipment take precedence. The procedure described here may differ from the description provided by the respective air-conditioning servicing equipment manufacturer. 
2. Extract refrigerant using air conditioning service equipment.
   1. 2.1 Wait for approx. 2 minutes after the air conditioning service equipment has switched itself off. If the pressure gauge reading rises above 0 bar, repeat the extraction process.
   2. 2.2 Drain the extracted refrigerant oil into a measuring cup on the air conditioning service equipment and determine the volume.