6
—28
5.2.
Installation of the motor
All work at the electrical connections of the fan must be carried out by a qualified electrician. If possible, the
drive motor should be fully installed at the fan manufacturing plant. If the installation is carried out by the
customer, the following instructions must be adhered to:
•
Observe the operation instructions of the motor manufacturer
•
The electrical installation must be completed according to the wiring diagram in the terminal box
•
Electric wiring must be in accordance with local technical specifications and ordinances of the motor
manufacturer.
-
Take care when fitting the cable into the terminal box that it is properly sealed and
watertight. Ensure that the length of the electrical connections within the component is sufficient to
allow for a shifting of the motor without any difficulties whenever the drive belt has to be replaced or
tightened.
•
Motor protection by
•
- Bi-metallic relay: Bi-metallic relays for motor protection to be adjusted to the nominal motor
current (FData plate).
•
Thermistor: with thermistor type for motor protection (motors with more than 3 kW nominal
rating) install thermistor to a tripping device in accordance with instructions.
•
Prior to switching on the unit, check speed and direction of rotation
as per direction arrow on the casing
by short turning on.
•
with 3-phase-motor- to change direction of rotation transpose two of the phases!
▪
with 1-phase-motor- to change direction of rotation transpose the position of leads Z1 (black)
and Z2 (orange) ( change of current direction in secondary winding)
6
Operating instructions
Only commence operation when fan is installed in
accordance with ordinances !
If the fan is started under free blow conditions, i.e. prior
to connecting to duct system, the current consumption
may exceed the rated current (forbidden area of the fan
curve)! Thermal protection of motor may activate!
6.1.
General safety instructions
•
Inspect all safety devices to ensure that they are properly mounted
•
Remove all foreign objects from the interior of the fan and the attached machines, as well as from
channels and pipelines
•
Check all control devices (valves, flaps, etc.) mounted in front of and behind the fan and ensure that
they are working properly. Prior to starting the unit, close the control devices.
•
Check the direction of rotation of the drive motor. It must correspond to the arrow on the side panel of
the fan’s volute casing
•
Ensure that only authorised persons are in the operating area of the fan
•
Inspect and commission the electric motor according to the instructions of the motor manufacturer
6.2.
Commissioning
•
Close all channel control devices and Switch on the motor
•
When nominal speed is reached, open the channel control devices to the set operating level
•
During the start-up procedure, pay special attention to the following:
o
Power consumption of the motor
o
Temperature of the motor bearing and winding
o
Smooth run of the fan and belt run (for fans with V-belt drive)
o
Fan bearing temperature (normal temperature range: approx. 40
– 70 °C)
o
Vibrations - The vibration level at the fan operating speed must not exceed 7 mm/s rms,
measured radiall
y at 2 points, 90º offset and at the free shaft end of the motor. Otherwise, the
fan must be balanced. Operation at a higher vibration level exceeding 11 mm/s rms* is not
allowed in case of fixed fan position. Operation at a higher vibration level exceeding 18 mm/s
rms* is not allowed in case of position on feet or anti-vibration mountings.
o
Bearing noises
