Sound Level; Impellers; Air Flow Direction And Direction Of Rotation; Safety - Helios MultiVent MV EC Série Notice De Montage Et D'utilisation

Installation and Operating Instructions
EN
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ATTENTION
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ATTENTION
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WARNING
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ATTENTION
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MultiVent MV EC..
– Acoustics
The noise data also refers to the above mentioned configuration. Adverse operating conditions etc. can lead to an
increase of the given data. Noise problems can be eliminated by using flexible sound attenuators (see Helios accesso-
ries).

1.10 Sound level

The sound levels stated in the catalogue can differ considerably after installation as the sound pressure level depends
on the absorption capacity of the room, the place of installation and other factors. Sound reduction is possible by using
sound attenuators (accessories) and speed regulation.

1.11 Impellers

The MultiVent MV EC.. fans have high-quality polymer impellers, optimized for high pressure and volume output.

1.12 Air flow direction and direction of rotation

The motors have a fixed direction of rotation, i.e. they are not reversible. The direction is indicated by arrows. (Fig. 1).

1.13 Safety

- A certified electrician may only carry out all servicing and installations!
- The fans may be operated only with the rated voltage indicated on the type plate!
- Technical data on type plate are to be adhered to without fail!
- The degree of protection given on the type plate is only valid with designed installation in accordance
with these installation and operating instructions and with closed unit.

1.14 Protection against accidental contact

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When installing observe the valid regulations for labour protection and accident prevention!
Protection against accidental contact according to DIN EN ISO 13857 is to be guaranteed!
Any contact with rotating parts must be avoided. Make sure that no textiles or other materials (such as clothing) which
could be sucked in are close to the suction area of the fan.
Fans protected by their installation (in ventilation ducts or closed aggregates) do not need a protection grille, if the
installation guarantees the protection. We emphasize that the installer will be held responsible for accidents occurring
as a result of missing protection devices.

1.15 Speed control

Variable speed control is possible for types MV EC.. using a potentiometer PU/A 10 (Ref. no. 1734/1735) or alternative-
ly with three stages by means of speed switch SU/A-3 10 (Ref. no. 4266/4267, Accessories).
The use of products from other manufacturers can, especially for electronic devices, lead to functional pro-
blems, the destruction of the controller and/or the fan. If regulators and controllers are used, which have not
been approved by Helios, guarantee and warranty claims will be void!

1.16 Motor protection device

All MiniVent EC centrifugal fans have integrated thermal contacts fitted which protect the EC motor and electronics.
Controlling multiple EC fans with a potentiometer
In order to control multiple EC fans above the setpoint input "0-10V", the 10V DC voltage source must supply the
sum of all setpoint input load currents.
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The parallel switching of +10V DC power supplies for multiple EC fans is not permitted!
Depending on the type, multiple EC fans can be controlled with the 10V DC power supply from one fan with a
potentiometer (PU/A). In this respect, consult the technical data for the control inputs and the wiring diagram SS-
1035.
If the EC power supply current is not sufficient, a sufficient (customer-supplied) 10V DC may be used (galvanically
isolated from the mains power supply). Alternatively, the "EUR EC" module from Helios can be used for various
control tasks
This protects the motor against overloading and overheating.
If the thermal contact trips frequently, this is a sign that a possible fault has occurred. The system must not be
operated and it must be investigated by a qualified electrician.
A = Rating plate information
B = Air flow direction
C = Inlet
D = Outlet
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Fig.1