A/C - R134a System Components And Capacities
GROUP: 87NUMBER: 93-02
DATE: May 10, 1993
SUBJECT:
R-134a refrigerant system components, replacing and system capacities
MODEL(s):
Golf/GTI/Jetta From 1993 m.y.
Condition
Replacement A/C compressors, evaporators and condensers supplied by the Parts Department are filled with Nitrogen.
In addition, replacement A/C compressors are filled with the total refrigerant oil (PAG oil) quantity needed for the entire refrigerant system.
Service
if gas (Nitrogen) does not escape when the caps are removed from a new compressor, evaporator or condenser, the component may be faulty (leaking), do not install.
Always replace the receiver drier whenever the refrigerant system has been opened. Keep refrigerant system and replacement components sealed for as long as possible to minimize the chance of dirt and moisture contamination.
If the system has been discharged due to a damaged or leaking component (hose, pipe, compressor, evaporator, condenser, etc.), flush the refrigerant system first with compressed air, then with nitrogen (available locally). This will remove the refrigerant oil which may be saturated with moisture.
CAUTION
DO NOT flush R-134a refrigerant system with R-11. R-11 is not compatible with R-134a refrigerant and PAG oil and will cause total system contamination.
After flushing the system, if the compressor is not replaced new, fill compressor with the correct type and quantity of refrigerant (PAG) oil as specified in the chart. Fill compressor with the total system oil capacity.
If the compressor is replaced new, do not add any additional oil; the total amount of oil required is already in the compressor.
Follow all Cautions and Warnings listed in the Repair Manual, Repair Group 87 when working on an R-134a A/C system.
A/C REFRIGERANT SYSTEM (R-134A), CAPACITIES
Refrigerant R-134a
Obtain R-134a refrigerant from a local A/C supplier under one of the following names:
^ R-134a
^ Tetrafluoroethane
^ CH/2 F CF/3
^ SUVA TRANS A/C
^ ARCTON 134a
Note
R-134a refrigerant is packaged in different containers. One variation is SUVA(R) COLD MP used only for commercial applications. This type of R-1 34a is sold in cylinders using a 1/4 flare fitting which will not connect to the 1/2-16 ACME fittings used on the vehicle and servicing equipment. Use only R-134a which comes in containers having the correct type of service fitting.
Use only the correct quantity 9f R-134a as specified.
REFRIGERANT OIL
Use only the correct type and quantity of refrigerant (PAG) oil as specified in the chart following.
CAUTION
Part numbers are for reference only. Always check with your Parts Department for latest parts information.
REFRIGERANT OIL DISTRIBUTION
With the A/C system operating the refrigerant (PAG) oil is distributed throughout the A/C system as follows: