Evaporator and Vacuum Tank

Evaporator opening
The evaporator is easily accessed through a special opening at the rear of the unit. The vacuum tank is also mounted on the cover (as illustrated below).

The evaporator is also provided with a filter to prevent water droplets formed on the unit from being blown into the system.




Integral vacuum tank
The vacuum tank is mounted on the heater housing, between the servomotor and evaporator.

The electrical vacuum pump previously installed in the engine compartment has been discontinued.

Ordinary engine vacuum is now sufficient since the system is electronically controlled and vacuum is only needed in the four vacuum bells used to operate the shutters. The solenoid valves open and close to control the vacuum in the vacuum bells.




Only three vacuum lines pass through the firewall into the engine compartment:
- between the engine compartment and vacuum tank;
- between the engine compartment and the interior temperature sensor in the roof light;
- between the solenoid valves and the vacuum-controlled
water valve.
No electrical wiring passes into the engine compartment.







1. Floor/defroster shutter
2. Bi-level shutter
3. Ventilation shutter
4. Recirculation shutter
5. Water valve
6. Vacuum tank
7. Firewall penetration
8. Interior temperature sensor
9. Intake manifold
10. Check valves





Vacuum functions





Rubber bellows at air intake
The air intake is fitted with a rubber bellows which greatly facilitates installation of the climate unit.