90S Quattro (Canada) V6-2.8L (AAH) (1993)
14 - EVAPORATOR
Liquid refrigerant entering the evaporator absorbs heat from air passing through the evaporator fins and cools the air. As the refrigerant absorbs heat it
turns to vapor and then is suctioned by the compressor.
^ 0-ring seal inlet:
10.8 mm inside diameter
1.8 mm thickness
^ 0-ring seal outlet:
17.2 mm inside diameter
1.8 mm thickness
^ Torque (evaporator line retaining bracket): 15 Nm (11.0 ft lb)
Note
Illustration shows the evaporator from an Audi 90 model.
15 - CONNECTION with Schrader valve
^ inaccessible with evaporator installed
16 - CAP, with seal
^ always reinstall over valve
17 - CONNECTION with Schrader valve
^ For A/C refrigerant low pressure switch
18 - LOW PRESSURE SWITCH
^ Switches A/C clutch OFF if system suction pressure is too low (low refrigerant charge). This switch protects the compressor if the refrigerant
system is empty.
^ Switching pressures: Opens (compressor OFF): 1.45-1.6 bar (21-23 psi) Closes (compressor ON): 2.9-3.4 bar (42-49 psi)
^ O-ring seal:
8.9 mm inside diameter
1.8 mm thickness
^ Torque: 5 Nm (44 in. lb)