Air Flow, Time Check, Vacuum

NOTE:
- Battery voltage should be 12V when carrying out test.
- Vacuum should be at least 35kPa (4.9 psi). If necessary use a separate vacuum pump.
- Air release points are indicated by arrows.
- The water valve is closed when Cool is selected.

Checking Air Distribution In Different Modes.








Max:
Water valve closed regardless of temperature selected. Recirculation and AC compressor engaged. Air from panel vents.








Norm:
Compressor engaged. No recirculation. Air from panel vents.








Bi-Level (B/L):
Air from panel and floor vents. Small amount of air from defroster vents. Compressor engaged.








Vent:
Air from panel vents. Compressor disengaged.








Floor:
Air from floor vents. Small amount of air from defroster vents. Compressor disengaged.








Floor/Defrost (F/D):
Air from floor and defroster vents. Compressor disengaged.








Defrost:
Air from defroster vents. Small amount of air from floor vents. Compressor engaged.





Operating Settings.
1 - Shutter will assume mid-position (F/D) if not supplied with vacuum.
2 - Direct connection between ports 7 and 8 is used only in MAX setting. Connection between 3 and 7 is then sealed.
3 - When temperature control is approx. 10 mm from max. COOL or to right of it, air is admitted to port 1 of water valve vacuum switch and valve is open since it is not supplied with vacuum.
With function selector at MAX and temperature selector set to "HOT", port 3 is sealed and vacuum is supplied directly from 8 to 7. The water valve is closed to obtain cooling even if the temperature control is not set to "COOL".