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Fan section
Fixing screws
for V-belt pulleys
Locking screw
Adjustable pulley
KG 40-100
V-belt
tensioning
screw
14
Commissioning
In accordance with DIN EN 1886, the unit must be opened with tools. Wait for
the fan to come to a complete standstill before opening the inspection doors.
When the doors are opened, negative pressure may draw in loose objects,
which could destroy the fan or even cause a risk to life if items of clothing are
drawn in.
Check that safety equipment such as V-belt or protective door grilles and
monitoring equipment is fitted and functions correctly.
- Commissioning may only be carried out if the ducts are connected and the
inspection doors are closed. Otherwise there is a risk of motor overload.
- Check that the V-belt pulleys and locking screws in the clamping bushings
Please note
are firmly seated.
Adjustable V-belt pulleys are not set before the unit is delivered, so must be
adjusted accordingly on site when commissioning the air handling unit.
They allow the fan speed to be changed by 10 %.
Setting:
To alter the pulley diameter, the adjustable pulley can be moved axially on a
threaded shaft (see adjacent diagram).
To do this, the V-belt must be slack and the locking screws in the adjustable
pulley need to be undone using an Allen key. After adjusting the pulley, firmly
retighten the locking screws and adjust the V-belt tension correctly. When
tightening, both locking screws must rest on the flattened threaded shaft.
- Check that the V-belt has the correct tension
(for retightening, see chapter on Maintenance).
The V-belt pulleys must be in perfect alignment.
- Turn ON the ON/OFF switch.
- Check the rotational direction of the fan impeller by briefly switching on the
drive motor. Correct the rotational direction if required.
Proceed with the utmost caution as it is necessary to open the door to the
fan section for these steps. There is a risk that loose objects may be drawn
in, which could destroy the fan or even cause a risk to life if items of clothing
(ties) are drawn in.
Please note
- Check the air volume. Check the pressure drop.
- Check the power consumption of the fan motor:
The motor current and motor rating must not exceed the values specified
on the motor type plate. It is imperative that the maximum specified
fan speed is not exceeded as otherwise the motor and fan would be
destroyed by this overload and undone or flying parts could destroy
other components.
Regarding air handling units with a controllable motor and/or variable recirculating
Please note
air section, the maximum power consumption in the entire control range must
be checked.
If necessary, correct the air volume by replacing the pulleys (with adjustable
pulleys, alter the pulley(s); see above).
3040530_201503
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