Zehnder Option Box Manuel De L'installateur page 21

Installation procedure
Be aware of electromagnetic interference (EMC) during
installation.
■ For the low voltage cables use a cable with the
following requirements:
- Maximum length: 30m
- Recommended Ø: 0,60mm
- Minimum Ø: 0,25mm
- Maximum Ø: 1,00mm
■ Make sure there is a barrier (e.g. separate channel
or compartment) or minimum distance of 150 mm
between power cables (e.g. 230V) and cables
susceptible to interference (e.g. control, low voltage,
interface, LAN, digital or analogue signal);
■ If interfering power cables and cables susceptible to
interference need to intersect each other, make sure
that this occurs perpendicularly;
■ Install one cable per gland opening;
■ Use the glands with one opening for high voltage
cables;
■ Use the glands with four openings for low voltage
cables.
These measures will minimise the EMC disturbance
as much as possible and will provide the best
communication.
1
Install the ventilation unit as described in
its own documentation.
When the ventilation unit is already
installed:
disconnect the power to the ventilation
unit and access the ComfoNet
connectors.
1
Example ancillaries
Install the necessary ancillaries as
instructed in their associated manuals.
1
Only available in Switzerland
2
2
2
2
Connect the data cable to a non-
connected ComfoNet plug-in connection
on the ventilation unit and device:
a. 12 Vdc: Red
b. GND: Black
c. CAN_H: Yellow
d. CAN_L: White
2
Install the power cable if one of the
following ancillaries are connected:
1
■ ComfoHood valve;
■ ComfoFond-L pump;
■ Sub-soil heat exchanger valve.
Low voltage cable
Bathroom switch
External fi lter error input
Standby switch
1
ComfoHood
1
ComfoHood
Error contact
ComfoFond-L Q temperature sensor
Post-heater temperature sensor
Post-heater control
0-10V input
ComfoNet cable
High voltage cable
1
ComfoHood
ComfoFond-L Q pump
Sub-soil heat exchanger valve
Mains power cable
3
1 2 3
Mount the device to the wall, with the 4
delivered screws, next to the ventilation
unit.
3
Close the device and commission the
connected ancillaries as instructed in
their associated manuals or in the next
chapters.
temperature sensor
switch
valve
EN - 21