Air Control Switch; Ventilation; External Circulation; Cab Air Circulation Switch - Zetor COMPAX CL Series Operator's Manual

Air Control Switch

The fan must be turned on to operate the air conditioner. The fan speed control and all air vents must be
adjusted to achieve the best possible interior cooling performance.
Under normal operating conditions and with doors and windows closed, the cab temperature is reduced by
6 °C to 15 °C (10 °F to 25 °F) compared to outside temperature. When operating the air conditioning system,
the air humidity level of the cab interior is reduced.
Note:
During cold weather, with ambient temperature above 32 ºF (0 ºC) operate the air conditioner at

least once per month, for a period of 10 to 15 minutes. This will lubricate the seals to prevent
them becoming brittle and help prevent the loss of refrigerant from the system.
The system is equipped with an environmentally safe refrigerant, R134a. Never recharge the air

conditioning system with refrigerant other than R134a as this will result in loss of cooling and
permanent damage to all air conditioning components.

Ventilation

The ventilation unit is housed in the cab ceiling.
To switch it on and adjust it, turn the electrical fan switch to the desired speed.
The cab becomes slightly pressurized when the ventilation system is in operation, so that the fresh air can
enter only by way of the filter installed in the rear section of the cab roof.
The fan switch can be operated only after the ignition key is inserted.
The air flow can be regulated and directed by suitable positioning the air diffusers.
Air can be taken in fresh from outside or recirculated from within the cab by way of the relative side inlets.

External Circulation

The air is supplied from outside the cab through the rear grille and filtered through a cab filter located behind
the grille.
*N.B: It is very important that the air diffusers never be completed closed so as to allow for a steady air flow.
To obtain a greater pressurization inside the cab, it is necessary to take the air from the outside, therefore
the inside air recirculatiing grille should be fully closed.

Cab Air Circulation Switch

To recirculate the cab air, open the recirculated air inlets on the side of the cab ceiling.
CABIN SYSTEM
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