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Installation and Operating Instructions
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WARNING
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WARNING
ATTENTION
Luftspalt
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AMD – Medium-pressure axial fans
1.5
Protection against contact
The generally applicable safety at work and accident prevention regulations must be observed for installation!
The operator is responsible for observing these regulations!
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Contact with rotating parts must be avoided. It must be ensured that there must be no persons, textiles or other
materials that could be sucked up, such as clothing, located in the intake area.
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Protection against contact may be necessary on the suction side depending on the installation conditions.
Appropriate protection grilles are available as accessories.
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Fans which are protected by their installation method (e.g. installation in ventilation ducts or closed assemblies)
do not require protection grilles if the plant provides the necessary level of safety. Please note that the operator
is responsible for complying with the current standard (DIN EN 13857) and can be held liable for accidents as a
consequence of missing protection systems.
1.6
Personnel qualification
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All electrical work as well as commissioning must only be carried out by qualified electricians.
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Installation, servicing and maintenance may be carried out by specialists (e.g.: industrial mechanics, mechatronics
engineers, metal workers or persons with comparable training) with the exception of electrical work.
1.7
Air flow direction and direction of rotation
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Parts ejected from the fan may damage your eyes!
Wear protective glasses when checking the direction of rotation!
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– The rotating impeller can sever or trap your fingers/arms!
– Operation only with mounted safety fittings!
– Risk of damage!
– Do not insert objects into the rotating impeller!
The air flow direction is blowing over the motor (see air and direction of rotation arrows).
The correct direction of rotation is right clockwise when viewing the impeller from the front.
The direction of rotation may only be checked when the fan is switched off and coasting!
The incorrect direction of rotation can lead to overheating and lack of fan performance!
1.8
Speed control
– All Helios medium-pressure axial fans are equipped ex-works with thermistors (PTC) on the casing terminal box as
winding protection. The PTC thermistor can be analysed in ventilation mode using the Helios full motor protection
switch MSA or Helios frequency converter (accessories).
– The 1-speed series AMD may be operated and speed-controlled in ventilation mode using the frequency inverter. It
is crucial that the fans and the frequency inverter are installed in compliance with the valid technical standards (use
of a shielded line and sine filter between the frequency inverter and fan). We recommend the use of a frequency
inverter with and all-pole sine filter, Helios type FU-BS and FU-CS (accessories). The respective values must not fall
below a minimum frequency of 20 Hz during fan operation.
1.9
Functional safety – Emergency operation
When using the fan in an important supply function, the plant is to be designed so that emergency operation is auto-
matically guaranteed in case of fan failure. Suitable solutions are, for example, parallel operation of two less powerful
units with a separate electric circuit, standby fan, alarm systems and emergency ventilation systems.
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Fig.1
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Freimaßtoleranzen
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ISO 2768 mH
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Tolerierung ISO 8015
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Erst.
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Freig.
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