Structure and function
Citan 12001-C/15001-C BAH0094-3 12.2019 73
5.17 Fan
The hydraulic motor (Fig. 73/2) drives the blower
fan (Fig. 73/1) and generates the air current. The
air current carries the seed to the coulters.
The blower fan speed determines the air volume
of the air current. The higher the blower fan
speed, the greater the air volume and system
pressure that is generated.
An air preheater is available as an option.
It reduces the air humidity in the delivery flow.
Fig. 73
The fan is equipped with a suction guard screen
(Fig. 73/1).
The suction guard screen prevents the suction of
straw residues into the blower fan under very dry
conditions.
Fig. 74
The pressure gauges on the loading board (Fig.
75/1...3) indicate the pressures in the individual
hopper chambers. The fan speed is set correctly
when the indicator for the pressure gauge is
between 45 and 60 mbar.
Fig. 75
At an idle, pressures between 25 and
35 bar are reached in the individual
hopper chambers.
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