90S Quattro (Canada) V6-2.8L (AAH) (1993)
Refrigerant: Technical Service Bulletins
A/C Refrigerant R-134A Properties
COMMERCIAL DESIGNATION
Obtain R-134a refrigerant from a local A/C supplier under one of the following names:
^ R-134a
^ Tetrafluoroethane
^ CH2 F CF3
^ H-FKW 134a
^ SUVA(R) TRANS A/C
^ ARCTON(R) 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-134a
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.
COLOR
Refrigerant R-134a is colorless and is invisible as a gas. R-134a when viewed through a sight glass (if installed) may appear milky due to the mixture of
refrigerant and lubricating oil (PAG oil).
TEMPERATURE/PRESSURE RELATIONSHIP
Similar to R-12 refrigerant, R-134a in an enclosed container will have a specific temperature/pressure relationship in the chart as shown.
REFRIGERANT OIL
A special Polyalkylene Glycol (PAG) synthetic oil is used in R-134a systems. This oil is NOT compatible with mineral based oils used in R-12 systems.
See safety measures section for Warnings and Cautions regarding; proper oil usage.
AIRBORNE PROPERTIES
Escaped refrigerant gases are heavier than air and will gather first in low places, like under the car. R-134a refrigerant gas displaces oxygen and may
cause suffocation in low areas of poor air circulation.