Zetor PROXIMA PLUS 8541, Operator'S Manual

Page: 30 / 223

30
ACQUAINTANCE WITH TRACTOR
E120 E121 E122
CAB AIR CIRCULATION CONTROL (D)
a - surrounding (ambient) air is sucked
through filters into the cab - air suction
from the cab is closed.
b - air is sucked from the cab interior and
again drawn into the cab (inner air re-
circulation for the fast temperature
adaptation in cab)
In this position the air inlet from
outside of the cab is fully closed
and in the cab no overpressure,
which prevents penetration of
non-filtered air into the cab, is
created! Use this position of the
control for urgently necessary
time only!
CORRECT FUNCTION OF HEATING
AND AIR-CONDITIONING
It is necessary to create overpressure in
the cab for a proper function of heating
or air-conditioning. Therefore we rec-
ommend shutting all windows, doors and
cab roof cover.
QUICK CAB INTERIOR HEATING
Proceed as follows:
1. Turn the heating valve control (A) to
the right-hand position (heating
valve fully open).
2. Set the air circulation control in the
cab (D) to the position of inner re-
circulation.
3. Choose the desired fan speed (posi-
tions 1, 2, 3) by the fan switch (B).
4. Set outlets to desired angle to avoid
direct blowing to persons in the cab.