Wiring Diagram - Helios HygroBox KWL Series Installation And Operating Instructions Manual

17 Wiring diagram

Connecting terminals 1 to 24 are labelled on the main board and designed as relay outputs with 230 V (see figure). With
regard to the design with the water heater battery, the 3-way motor mixer valve and the circulation pump are connected
to the following relay outputs:
3-way motor mixer valve (terminals 15 to 18):
Terminal 15 - phase mixer closed
Terminal 16 - phase mixer open
Terminal 17 - neutral conductor
Terminal 18 - protective conductor
Circulation pump (terminals 19 to 21):
Terminal 19 - phase
Terminal 20 - neutral conductor
Terminal 21 - protective conductor
The humidification unit can be switched off (open contact) and on (closed contact) in parallel with the ventilation device
with the Ventilation Device Switch Input. The switch input must be activated in the Expert menu if automatic
synchronous operation cannot be guaranteed because the sound level is too low.
In the case of an external temperature sensor, a sensor can optionally be connected, on the basis of which the air
outlet temperature is controlled automatically. This is only required in connection with a second heater battery (low-
temperature heater/air heater).
The floating output can be used for a function check with an external regulating and control unit for the possible
visualisation of faults.
E heater batteries 1, 2, 3 and fan unit are only active for the electric version.
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