Ultra
Assembly, installation and operating instructions
42
7.3.2 Connection (*C1)
Wrong!
Star-shaped wiring of the bus lines.
General information
Route all low voltage cables along the shortest route.
Ensure that low-voltage and power cables are separated, using
metal partitions on cable harnesses.
Use only shielded cables as low-voltage and bus cables.
Lay all BUS cables in a linear pattern. Star-shaped wiring is not
permitted.
The KaController is connected via a bus connection to the respect-
ive control PCB on the unit.
Right!
Linear wiring of the bus lines.
Tab. 9: Wiring of bus lines
IMPORTANT NOTE!
Use shielded, paired cables as bus cables, UNITRONIC® BUS LD 2x2x0.22, but at least of the same value or
higher.
IMPORTANT NOTE!
When laying bus cables, avoid the formation of star points, for instance in junction boxes. Loop the cables
through to the units!
Description of wiring
The KaControl module offers the option of controlling the fan motor and value actuator either via a 0 - 10 VDC signal or via
the KaController. The EC fan and the KaControl recirculation air module can be disconnected from the mains power supply
via the integral master switch.
None
of the additional attachments are disconnected from the mains power supply via the
main switch.
