Herz MD10, Руководство по эксплуатации

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BA MD10MD14 V30 R20 07_2021 DE-GB.docx Technische Änderungen vorbehalten / Technical changes reserved 11
1.5 Suction effect (1)
1.6 Blowing effect (2)
1.7 Temperature
In the case of high-power models in particular, the temperature of
the conveyed medium can increase as it flows from the intake side
to the exhaust side. The temperature difference can be in the
region of up to +20°C, depending on the operating conditions. This
varies from one model to another.
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 blower is not constant throughout the
performance range. For details of noise emission levels, please
refer to the table on page 16.
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 operator to avoid
exceeding the statutory maximum levels at the workplace and in
the immediate vicinity of the 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 Electrical hazards
1.11 Speeds
Each component on the blower has unique natural frequencies.
These can be induced by certain blower speeds, which may result
in resonance mode.
The 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 blower is operated on a frequency converter.
These circumstances are also influenced by the customer’s
individual installation situation or ventilation connection.
These natural frequencies must be excluded by parametrising the
frequency converter accordingly should they be present within the
speed range of the blower.
Maximum frequency
(see rating plate)
Minimum frequency
50 Hz 5 Hz
60 Hz 5 Hz
> 60 Hz 20 Hz
Device with temperature
barrier
(independent of the
frequency)
35 Hz
1.12 Allowed mounting positions
Warning!
Risk of injury due to suction effect!
Objects, clothing and hair can be sucked in at the
intake port.
The operator is required to wear a hairnet and
tight-fi tting clothing.
Do not stay near the suction opening during
operation!
Warning!
Risk of injury due to strong blow-out effect of the
medium and ejected parts!
Impurities, debris and impermissible media may
cause objects to be thrown out of the fan outlet at
high speed!
Make sure that the fan delivers only clean air!
Warning!
The blower housing assumes the temperature of
the conveyed medium during operation. If this is
above +50°C, the blower must be protected
against direct contact by the operator (risk of
burning!).
Warning!
The motor housing heats up during operation. If
the temperature rises above +50°C, the blower
must be protected by the operating company
against direct contact (risk of burning!).
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
components are not live and secure it against
reactivation.
Warning!
The maximum speed stamped on the motor rating
plate must never be exceeded in order to prevent
personal injury. The blower is at risk of
mechanical damage if the speed is exceeded.
This can cause serious injury or death!
Note!
Fastening to the fan is only permitted via a fixed
connection!
Do not use expansion joints as a fixed
connection!
Note!
Installation positions with a vertical drive shaft
halve the life of the ball bearings.
See „5.1 Ball Bearings“ for more information.