12
W2
U2
V2
U1
V1
W1
W2
U2
V2
U1
V1
W1
(L3) (L1)
(L3) (L1)
L1 L2 L3
L1 L2 L3
EN
Operating and assembly instructions ND
www.elektror.com
016303 03.14/09
3 INFORMATION ON COMMISSIONING
THE MACHINE
3.1 Installation and assembly
• Protect the blower from the weather and install it in a
horizontal position, see also 1.1. For outdoor use, protec-
tion from the weather must generally be provided that ful
fi
ls
the requirements listed in 1.1 Intended Use and protects
the blower from the in
fl
uences of the weather.
• Avoid vibrational and impact loads during operation.
Permissible vibrational load on blower:
refer to ISO 14694, BV-3.
• Standard blowers with base:
Bolt securely to a level
and
fi
rm surface at the place of use, making sure that the
surface has adequate load-bearing capacity and avoiding
vibration transmission or vibrational load.
• Standard blowers without base:
Bolt securely to a
fi
rm surface at the place of use, making
sure the surface has adequate load-bearing capacity and
avoiding vibration transmission or vibrational load. This
type of installation can be used for ND blowers with an
intake and/or a discharge side connection up to type:
D 066 or E 066 and 2D 066.
• Installation of standard blowers with a vertical drive shaft is
possible with ND blowers up to the following models:
maximum to D 082.
• Cover the open intake and/or a discharge connection with
wire guards compliant with DIN EN ISO 13857.
• Ensure adequate motor ventilation. Permissible ambient
temperatures:
Standard version with rated voltage (max. +/-10% voltage
tolerance) and a design frequency of 50Hz or 60Hz.
• Ambient temperature -20°C to +60°C
Special voltages, multi-voltage motors, FU compatible
versions, FUK versions, appliances with UL certi
fi
cation,
appliances with Aircontrol:
• Ambient temperature -20°C to +40°C
The performance of the drive motor’s ventilation system
must not be impaired by the installation situation
3.2 Electrical connection
Note!
The work described in this section may only be
performed by a qualifi ed electrician. Connect the
appliance to the power supply in the terminal box
as per the wiring diagram and observing the ap-
plicable local regulations.
Three-phase or a.c. motors can be used as drive motors.
In the appliance designation, the letter D stands for three-
phase a.c. and the letter E for single-phase a.c.
• The drive motor has to be safeguarded by a motor circuit
breaker (this does not apply to frequency-converter-oper-
ated appliances). Where appliances are frequency-
converter-operated, the existing temperature sensor
(PTC resistor sensor) or temperature switch (normally
closed contact) must be connected to the converter and
evaluated.
• Check to see if the mains voltage matches the voltage
speci
fi
ed on the rating plate.
• The safety earth terminal can be found in the terminal box.
Note!
For operation of the drive motor with a frequency
converter, the following points should also be
noted:
• Motors may only be operated on a frequency
converter if they have “/FU” (which denotes
“frequency converter compatible”) marked on
the rating plate, or if they have been ordered as
“frequency converter compatible” motors and
confi rmed.
• The frequency converter supply voltage must
only be a maximum of 400 V without the motor
fi lter. Appropriate measures, such as a motor
fi lter to protect the motor, must be installed on
the motor terminals with longer cables, higher
frequency converter supply voltages and/or if
the pulse voltages are exceeded (max. 1000 Vpk
for drive motors up to 0.75 kW, maximum 1300
Vpk for drive motors larger than 0.75 kW). Please
contact the converter supplier in this case. If a
motor fi lter is included in the delivery, this must
be installed between the converter and the motor.
Please ensure that there is suffi cient space in the
switch cabinet and take into account the installa-
tion and assembly requirements in the operating
instructions of the frequency converter/motor
fi lter manufacturer.
• The wire running between the motor and the
frequency converter must not exceed a length of
20 m, confi gured as a suitable, shielded cable and
laid by as direct a route as possible, without any
additional plug/clamp connections.
• The braided screen in the connecting cable
must cover the full length of the cable on both
sides, i.e. be connected to the grounding system
at the frequency converter and to the motor using
a low electrical resistance. For this purpose, suit-
able EMC cable couplings must be used on the
motor side. They must contact the cable shield
around its full circumference and have a low
resistance.
For further information about EMC compliant installation and
assembly, refer to the operating and assembly instructions
issued by the frequency converter manufacturer.
3.2.1 Confi guration for three-phase a.c. blowers
circuit
Y circuit
(low voltage)
(high voltage)
Checking the direction of rotation
Switch on the blower. The running direction of the impeller
should correspond to the direction arrow on the housing. If
the impeller rotates in the wrong direction, then interchange
L1 and L3.
Star-delta start-up
Motors with ratings of above 3.5 kW are suitable for star-delta
start-up on the mains supply. For direct on-line starting (high
short circuit current at the instant the motor is energised),
please contact your local utility for details of conditions.
