11
Operating and assembly instructions SD
www.elektror.com
0241
18 07.16/06
EN
1.5 Suction effect
The side channel blowers produce a powerful suction effect.
Warning!
Objects, items of clothing and also hair can be
sucked into the intake port. Risk of injury!
Do not stand near the intake opening during
operation.
The side channel blower must not be operated
with an open intake opening. The intake opening
must be covered with protective grating accord-
ing to DIN EN ISO 13857.
Never place your hands in the intake opening.
1.6 Blowing effect
Warning!
The blowing effect 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 side channel 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) must be
connected to the converter and evaluated.
1.9 Noise emission
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 60°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
Before carrying out electrical work, the appliance must al-
ways be switched off and protected against accidental re-
starting. Check that no voltage is present.
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 nat-
ural frequencies. These can be induced by certain side chan-
nel 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.
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.
• Do not leave the side channel blower unprotected in the
open (protect against ingress of moisture).
• Attach hoist securely. Only use hoists and load suspension
devices with suf
fi
cient load-carrying capacity. Secure the
route of transportation.
