Main Power Connector; Comfonet Connector; Malfunction Procedures - Zehnder Option Box Manuel De L'installateur

Operation
The ventilation unit will control the 6b (power) connector
with the information received from the 6a (temperature
sensor) connector.
The fi rst two minutes after powerup of the ventilation
unit the sensor has not reached the actual temperature
yet to know if the sub-soil heat exchanger valve needs
to be opened. Therefore the sub-soil heat exchanger
valve will remain closed for at least the fi rst two minutes
after powerup of the ventilation unit.
When the ventilation unit is able to reach the requested
supply air without the assistance of the sub-soil heat
exchanger valve the sub-soil heat exchanger valve will
remain closed. If the sub-soil heat exchanger valve
gives a poor result on the outdoor air temperature at the
ventilation unit, the ventilation unit will close the sub-soil
heat exchanger valve.
If the connection with the sensor of the sub-soil heat
exchanger valve is lost the ventilation unit will close
the sub-soil heat exchanger valve and give the error
GROUND_HEAT_CONNECT_ERROR on the display of
the ventilation unit.

12 Main power connector

You can always install the power cable
of the device but it is only needed if a
230V ancillary is powered by the device.
The following 230V ancillaries are
powered by the device:
1
■ ComfoHood valve;
■ ComfoFond-L pump;
■ Sub-soil heat exchanger valve.
All other functions are powered through the ComfoNet
of the ventilation unit with a maximum of 150mA. The
device is limited to deliver a maximum of 10A to the
powered 230V ancillaries connections. Ensure all the
connected devices do not exceed these maximums.
1
Only available in Switzerland

13 ComfoNet connector

Each ComfoNet connector can be
connected to any ComfoNet device. When
you would like to connect more ComfoNet
devices then there are available ComfoNet
connectors, install a ComfoSplitter.
The complete ComfoNet system is limited to deliver a
maximum of 150mA. If all connected devices need more
the 150mA you need to install a powered ComfoSplitter.
Wiring diagram ComfoNet

14 Malfunction procedures

The device does not have a digital control system that
indicates malfunction codes.
The ventilation unit has a display that indicates
malfunction codes. The service manual of the ventilation
unit states what the malfunction codes mean and how to
rectify these malfunctions.
EN - 27