13
Z2
U2
U1
Z1
L1 N
L1 N
Z2
U2
U1
Z1
U
B
0
f
B
Prohibited
range
EN
Operating and assembly instructions ND
www.elektror.com
016303 03.14/09
3.2.3 Confi guration for single-phase a.c. blowers
Clockwise rotation Anti-clockwise rotation
3.3 Special confi gurations and additional clamps
Terminal diagrams can be found in the motor terminal box for
voltage interchangeable motors, pole-changeable motors,
FU motors and other special con
fi
gurations of three-phase
a.c. and a.c. motors. This also applies to the optional thermal
winding protection and the space heater.
3.4 Declaration concerning the EMC Directive
(2004/108/EC)
Our blowers are components that are designed to be in-
stalled in other machines or systems by quali
fi
ed personnel,
i.e. not intended for consumers. The manufacturer of the
fi
nal system/machine must guarantee/con
fi
rm that the
fi
nal
system/machine complies with the EMC Directive.
Blowers with mains operation:
With mains operation to a sinusoidal AC voltage, the asyn-
chronous motors with a squirrel-cage rotor that are built into
the devices meet the requirements of the EC “Electromag-
netic Compatibility” Directive 2004/108/EC, taking into ac-
count the standards EN 61000-6-4 (Emitted interference in
industrial environments) and EN 61000-6-3 (Emitted interfer-
ence in residential environments).
Blowers with frequency converter operation (FC):
Prior to the start-up and during operation of the device on a
frequency converter (provided that this is suitable) it is es-
sential that the EMC instructions from the frequency convert-
er manufacturer and the information in the Elektror operating
and assembly instructions are observed in order to meet the
requirements of the EC “Electromagnetic Compatibility” Di-
rective 2004/108/EC.
If the device is delivered together with an Elektror switch cab-
inet frequency converter package, it is possible to comply
with the EN61800-3 category C2 (Industrial environments),
taking into consideration the above-mentioned EMC instruc-
tions.
Warning!
This product may cause high-frequency inter-
ference in a residential environment that may
require screening measures.
Blowers with an in-built frequency converter (FUK):
Devices with an in-built frequency converter meet the require-
ments of the EC “Electromagnetic Compatibility” Directive
2004/108/EC under consideration of EN 61800-3 Category
C2 (industrial environment), taking into account the EMC in-
structions from the frequency converter and the information
in the Elektror operating and assembly instructions.
Warning:
This product may cause high-frequency inter-
ference in a residential environment that may
require screening measures.
A CE conformity assessment with the relevant standards and
guidelines must be carried out in all cases before the start-
up.
4 INSTRUCTIONS FOR OPERATION
AND USE
4.1 Basic information
Please observe the notes on designated use in section 1.1,
as well as the safety guidelines in sections 1.2 to 1.10.
If electrical current exceeds the rated current of the drive mo-
tor during operation, check to see if the mains voltage and
frequency match the appliance ratings.
After a protective shutdown, e.g. tripping of the motor circuit-
breaker, activation of the PTC evaluation unit by motors with
a PTC resistor sensor, or after a protective shutdown of the
frequency converter during FU applications, the appliance
must not be restarted until the case of the problem has been
identi
fi
ed and eliminated.
If the blower cannot be operated over the whole range of the
characteristic curve, the motor may overload if the system
resistance is too low (excessive current consumption). The
volumetric air
fl
ow should be reduced in this case by means
of a throttle valve
fi
tted on the intake or discharge side.
The blower must not be subjected to vibration or impact
loads.
4.2 Frequency converter operation
A frequency converter is used, allowing a wide range of
speed adjustments. There is only a small, load-related dif-
ference in rpm between idle state and the max. load of the
blowers and the lateral channel blower.
To ensure trouble-free operation of blowers and lateral
channel blowers, it is important that the converter meet
the following requirements:
• Converter output equal to or greater than motor power
output *))
• Converter current equal to or greater than motor current *)
• Converter output voltage equal to rated motor voltage
• The pulse frequency of the converter should be 8 kHz,
because a lower pulse frequency will lead to noisy motor
operation
• The converter should have a connection for a tempera-
ture sensor (PTC resistor sensor) or a temperature switch
(normally-closed contact)
*) Refer to the rating plate for data
The motor can be operated in a delta or star-point con
fi
gu-
ration, depending on the input voltage of the converter.
The following U/f assignments must be confi gured at
the converter.
f
B
and U
B
= refer to rating plate
If this is ignored, the motor current will increase disproportion-
ately and the drive motor will fail to achieve its rated speed.
