68
.
3.25
KaCool D AF –
Comfortable feeling of well-being, thanks to AtmosFeel
Chilled water air conditioning system
Installation and operating instructions
6.11 Cabling
6.11.1 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
(figure on left).
The KaController is connected via a bus connection to the respective
control PCB on the unit.
Use shielded, paired cables as bus cables, for instance UNITRONIC
®
BUS LD 2x2x0.22, but at least of the same value or higher.
When laying bus cables, avoid the formation of star points, for instance in
junction boxes. Loop the cables through to the unit!
Wrong!
Star-shaped wiring of the bus lines.
Right!
Linear wiring of the bus lines.
A flush-mounted back box is required for the KaController.
Connect the KaController to the nearest KaControl as per the wiring
diagram. The maximum bus length between the KaController and the
KaControl unit is 30 m.
Connecting a KaController to it automatically converts the respective
KaControl into the master unit in the control circuit.
6.11.2 KaController
** Lay shielded, paired
cables, e.g. UNITRONIC
®
BUS LD 2x2x0.22 or
of the same value,
separately from power
cables!
Mains power
230V/50 Hz
Mains power
230V/50 Hz
3
2**
3**
2**
3
Master
unit
#1
Flush-mounted back box
Slave unit
#2
bus connection: 30 m
Maximum length of
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