21
Adjustment of the suction plenum of the fan
Due to the transport and the handling, the shell could be decentered in relation to the free wheel of the fan. Before
the first starting up of the unit (not supplied by electricity), you can make a first control which will be to turn the
free wheel with the hand in order to check if there is no rubbing. You could complete this test by checking the play
of the height and the width of both sides of the wheel.
If it is decentered, it is necessary to re-center the shell. It means:
1/ it is necessary to disunite the fan from the inside
panel of dividing wall to take out the unit.
2/ When the unit it is taking out, unscrew the
fixation screw of the shell and proceed to its
alignment with the turbine of the fan. Make the
same reverse process for the reassembly.
4 fixation screws
to unscrews in order to withdraw the
fan motor assembly
Fixation screws of the suction plenum
7.4. Fans EC
Fans are pre-wired in the factory in order to facilitate the electrical connection.
The installer would have to ensure that the connection, the protection and the motor controller are done
following the electric standards.
Models EC
Mistral 20
Mistral 30
Mistral 40
Mistral 50
Mistral 60
Number of motors
230 V – 50Hz
400 V – 50Hz
400 V – 50Hz
Unitary capacity (kW)
1
1
2
Maximum speed (rpm)
0.75
1.00
1.00
IP
3 450
3 100
3 100
Number of motors
54
54
54
The operating point setting is achieved by signal 0 - 10 V. Modbus communication possible
Fans number depends on the selected unit model.
Each fan is composed of a reaction turbine directly driven by a motor at electronic commutation (EC).
The electric motor has an integrated thermal protection.
The rated power of the electric motor depends on the operating ranging needed (cf. selection software)
The motor is wired in 230V / 1 / 50Hz on Mistral 20 and in delta connection 400V / 3 / 50Hz on
others sizes.
A signal 0-10V (supplied by third) adapts the fan speed to desired operating point.
Operating limits:
Minimum allowable voltage = 2 V
Maximum allowable voltage = 10 V
Maximum allowable air temperature : 40°C
Refer to the identification plate of the unit and to the technical specification sheet to get more
information.
