Connection And Commissioning; Electrical Connection; Mains Connection Of The Control Module Dx; Connect Communication Cable - Helios AIR1-SM DX Installation And Operating Instructions Manual

Installation and Operating Instructions
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DANGER
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Control module AIR1-SM DX
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Connection and commissioning

271 Electrical connection

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Danger to life due to electric shock!
The unit must be fully isolated from the mains power supply before all maintenance and installation work and
opening the terminal compartment! The electrical connections must be carried out in accordance with the fol-
lowing wiring diagrams and must only be carried out by qualified electricians The electrical connection must
be fully isolated until the final assembly!
The control module DX is equipped with a 1A fuse terminal which protects the circuit in the event of a failure.
If the AIR1-SM DX control module is to be operated on a residual current circuit breaker, we recommend:
RCD type:
Current RCD:

272 Mains connection of the control module DX

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Danger to life due to electric shock!
Risk of injury due to electric shock, hot surfaces and potentially hot surface of optional auxiliary heater
The electrical connection must be fully isolated until the final assembly!
– Open the terminal box.
– Check the cross-section of the cable used for the power connection (recommended cable cross-section
1.5 mm²).
– Connect the cables to the terminals. The cable connections can be found in the wiring diagram in chapter 2.7.5.

273 Connect communication cable

The use of a shielded cable is strongly recommended for the RS-485 communication between the AIR1 ventilation unit
and the control module DX. The shielding must be earthed to avoid electromagnetic effects.
The maximum distance for the RS-485 cable between the AIR1 ventilation unit and the control module DX is
15 m

274 Wiring change-over register DX and AIR1 unit

Remove the cover of the control module DX and connect the wiring to the terminal box of the AIR1 ventilation unit and
to the terminal box of an on-site cooling system in accordance with the wiring diagram (see chapter 2.7.5). Then close
all terminal boxes.
The terminal box must be installed in a protected location
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30 mA
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