Installation; Commissioning - Zehnder ComfoConnect KNX C Manuel D'utilisation

5 Installation

1. Disconnect the power from the ventilation unit
before installing equipment. Always observe the
local safety regulations.
2. Mount the ComfoConnect KNX C on the wall,
preferably near the ventilation unit.
3. Connect KNX according to the +/- indication on
the housing.
4. Connect the 4-wire ComfoNet cable to one of the
ComfoNet connectors according to the indicated
wire colouring. The ComfoNet cable has to comply
to the following requirements:
� Maximum length: 50 m;
� Number of wires: 2x2 (twisted pair);
� Not shielded;
� Core: rigid (solid) wire for insertion elements;
� Colours: preferably compatible with the
connectors;
� Minimum ø: 0.2 mm 2
� Optimum: DIN VDE 0281: J-Y(St)Y 2x2x0.6;
� Maximum ø: 1.5 mm 2
5. Optionally, connect a second ComfoNet cable
to the other ComfoNet connector for combining
other ComfoNet devices.
6. Mount the pull relief to the wall and use it as a
cable opening for all cables to and from the unit.
This prevents the cables from being pulled out of
the equipment.
7. Connect (one of) the ComfoNet cable(s) to the
ventilation unit.
8. Turn on power on the KNX bus, if it is not turned
on already.
9. Turn on the power of the ventilation unit, which will
in turn supply power to ComfoNet and the unit.

6 Commissioning

1. Download and install ETS5 from www.knx.org.
2. Download the Zehnder KNX library from your
country website. See back page.
3. Complete commissioning of the ventilation unit as
described in its manual.
4. Install the unit as defined in the previous chapter.
Make sure that the ventilation unit (and therefore
ComfoNet) has been powered on and the
ComfoNet LED is lit. The activity LED should be
on or flashing once in a while, but not steadily
blinking once per second.
5. The factory default settings do not include a KNX
configuration. Hence, the unit will not have a KNX
device address or group object configuration
upon first configuration. Use ETS5 to define a
KNX project. See the object list in the chapter
"Group Objects" for a description of the interface
of the unit. You have the option to decide
whether...
a. ...the ventilation unit has to run its own
schedule, and KNX observes the state
(Auto mode, see chapter "Group Objects').
In this case, e.g. the ventilation preset and
temperature setpoint are determined by the
ventilation unit. Refer to the manual of the
ventilation unit how to configure its schedule.
b. ...the ventilation unit is a slave to KNX,
in which a KNX device determines and
communicates e.g. the ventilation preset and
temperature setpoint to the ventilation unit
(Manual mode). The internal scheduler of the
ventilation unit is disabled.
The choice between the two modes depends on
how the ventilation unit is to be integrated in the
KNX setup. See chapter "Auto mode" for the exact
difference of using Auto or Manual mode.
6. In order to download the application, as defined
in ETS, press the programming mode button.
The KNX LED will start blinking slowly. During
download, the KNX LED blinks quickly. After
download, or when the programming mode button
is pressed again, the unit exits programming
mode.
7. Verify correct behaviour of the configured KNX
setup.
EN - 17