11
Operating and assembly instructions SD
www.elektror.com
9016312 01.20/09
EN
1.6 Blowing e
ff
ect
Warning!
The blowing e
ff
ect is very powerful on the ex-
haust side. Sucked in objects may be ejected at
very high speed (danger of injury).
The side channel blowers are designed for
delivery of clean air only. To reliably prevent the
sucking-in of foreign objects or contaminants,
which might be discharged, these objects have to
be removed before entering into the side channel
blower by installing a
fi
lter.
Do not reach into the exhaust.
1.7 Temperature
Warning!
The motor-/ blower housing heats up during
operation. If the temperature rises above +50 °C,
the side channel blower must be protected by the
operating company against direct contact (risk of
burning!).
1.8 Motor circuit breaker
Before putting the blower into operation, be sure to safeguard
the drive motor with a motor circuit-breaker (this does not
apply to frequency-converter-operated 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.
1.9 Noise emission
Note!
Wear hearing protection during operation at a
daily exposure level of 80 dB(A) and above, and/
or a peak sound pressure level of 135 dB(C) and
above.
Failure to do so may cause hearing damage.
The noise generated by a side channel blower is not con-
stant throughout the performance range. For details of radi-
ated noise level, please refer to the table on pages 20 to 25.
In some cases, sound insulation may be necessary (it is
recommended that emission levels be measured by the
operator). Sound insulation must be provided by the opera-
tor to avoid exceeding the statutory maximum levels at the
workplace and in the immediate vicinity of the side channel
blower.
No sound insulation of any kind whatsoever should cause
the ambient temperature to 40°C at the drive motor
(this is not permissible).
1.10 V-belt drive (only applies to side channel blower
without
motor)
Note!
The side channel blowers are equipped as stand-
ard with V-belt pulleys for narrow V-belts accord-
ing to DIN 7753.
To avoid premature damage to the deep-groove
ball bearings, the V-belt drives must be correctly
pretensioned. The V-belt drive must be rated us-
ing the calculation method speci
fi
ed by the belt
manufacturer.
• The blower belt pulley must not be modi
fi
ed.
• The max. permissible compressor speed must not be
exceeded (see table on pages 20-25).
• The belt drive and freely rotating parts must be covered
with belt guard according to DIN EN ISO 13857.
• The belt tension should be checked after the blower has
been running for approx. 2 hours. The belts must be
retensioned if necessary.
Belt tension: see table on page 25
• Never put the side channel blower into operation if the
protective grating is not installed and
fi
rmly screwed on
(risk of injury).
1.11 Electrical hazards
Danger!
Danger from electric current!
Live components carry current and cause fatal
injuries!
Deactivate the device before opening it, reaching
into it or inserting tools into it; check that compo-
nents are not live and secure it against reactiva-
tion.
1.12 Speeds
Warning!
The maximum speed stamped on the motor
rating plate must never be exceeded in order to
prevent personal injury. The side channel blower
is at risk of mechanical damage if the speed is
exceeded.
This can cause serious injury or death!
Each component on the side channel blower has unique natu-
ral frequencies. These can be induced by certain side channel
blower speeds, which may result in resonance mode. The side
channel blowers are designed in such a way that resonance
does not generally occur at a constant operating speed.
This may be induced in certain circumstances when the
speed is changed if the side channel blower is operated on
a frequency converter. These circumstances are also in
fl
u-
enced by the customer’s individual installation situation or
ventilation connection.
These natural frequencies must be excluded by parametris-
ing the frequency converter accordingly should they be pre-
sent within the speed range of the side channel blower.
Maximum frequency (see
rating plate)
Minimum frequency
50 Hz
5 Hz
60 Hz
5 Hz
> 60 Hz
20 Hz
2 INFORMATION ON TRANSPORT,
HANDLNG AND STORAGE OF THE
MACHINE
2.1 Transportation and handling
• Before installation and putting into service, check all parts
for transit damage. A damaged side channel blower is a
potential safety hazard and, therefore, should not be put
into service.
