Chapter 5 Electrical Connection; Connect Unit - Helios KWL 200/300 W Montage- Und Betriebsvorschrift

Installation and Operating Instructions
CHAPTER 5
ELECTRICAL
CONNECTION
m
DANGER
ATTENTION
Central ventilation unit – KWL 200/300 W/W ET
5.1

Connect unit

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Danger to life due to electric shock!
An electric shock can result in death or serious injuries.
> Before any maintenance and installation work or before opening the cover, the unit must be fully isolated from
the power supply.
> The electrical connection may only be carried out by an authorised electrician according to the wiring diagrams.
Unit damage due to the unnoticed resetting of the electrical pre-heater's thermal contact switch!
The unnoticed resetting of the electrical pre-heater's thermal contact switch can result in unit damage.
> When using an electric pre-heater (KWL-EVH), the unit must not be regularly activated or deactivated via an
external switching device (e.g. timer) in the unit supply line.
1. Connect unit in accordance with the connection diagrams. When using an electric pre-heater (KWL-EVH), a timer
must not be integrated into the unit supply line.
2. Install isolator and main switch.
An isolator and main switch (accessories) must be integrated in the unit supply line. The contact opening must be at
least 3 mm. The isolator and main switch must be secured against unintended restart by suitable means.
If a residual current circuit breaker is installed in the supply line of the unit, the residual current circuit breaker must
have the following technical features: Type A or B with a rated differential current of 30 mA.
The unit has a leakage current of AC 0.6 mA and DC <0.1 mA.
18
EN