Electronic Control Board; Parallel Operation Of Multi-Speed Fans - Helios Ultra Silence ELS EC series Montage- Und Betriebsvorschrift

Installation and Operating Instructions
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DANGER
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DANGER
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IMPORTANT NOTE
Fan unit ELS EC..
9.1 Opening the control box
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The safety instructions specified in section 1.2 must be observed!
The unit must be fully isolated from the mains power supply before all maintenance and installation work or
before opening the terminal compartment! The electrical connection must only be carried out by an authorised
electrician according to the following wiring diagrams.
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The electrical connection must be fully isolated from the mains power supply until the final assembly!
Observe wiring diagrams!
Before opening the cover:
After fully isolating the unit from the mains power supply and removing the spiral from the casing, wait 3 min. until the
connection cover can be opened.
Observe yellow label on the casing!
– Opening the control box
Note: Do not forcibly bend the snap-in hooks, as otherwise there is a risk of breakage!
The control box cannot be opened when the fan unit
Fig.31
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Fan unit

Electronic control board

9.2
The electronic control board enables various type-specific modes of operation, such as e.g. interval, overrun, humidity
and presence.
The board is located in the jet water-proof casing and holds the plug pins for the electrical connection with the casing
(in overall installation with facade).
9.3

Parallel operation of multi-speed fans

The direct parallel switching of the switch inputs is possible.
The ELS EC types may be directly switched in parallel.
is installed!
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Fig.32
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