Katherm HK
Assembly, installation and operating instructions
56
Circuit description
All trench heaters need a 230 V / 50 Hz power supply.
Factory-fitted actuators are wired to the terminals.
The speed of the EC fans used is controlled by a 0-10 V DC signal from the KaControl. The internal motor electronics de-
tects any possible motor malfunction and automatically switches off the fan.
The KaControl allows the fan and the valve actuator(s) either to be controlled by one and/or two (2- / 4-pipe) 0 – 10 V
DC signals or by the KaController.
Junction box for HK 230/130, 245/160, 360/210
Junction box for HK 290/160
1
2
3
4
5
1
5
3
4
Fig.15: KaControl junction box (*C1)
1
Power supply
2
Slot for interface card
3
KaController connection and control contacts
4
Fan and valve actuators
5
DIP switch
Observe these points in the following installation diagrams for Katherm HK with KaControl:
Comply with the details on cable types and cabling with due consideration of VDE 0100.
Without *: NYM-J. The requisite number of wires, including PE conductor, is stated on the cable. Cross-sections are not
stated, as the cable length is involved in the calculation of the cross-section.
With *: J-Y(ST)Y 0.8mm. Lay separately from high voltage lines.
With **: Lay UNITRONIC BUS LD 0.22 mm² or similar separately from high voltage lines.
If other types of cables are used, they must be at least equivalent.
Length of the BUS line from the KaController to unit 1: max. 30 m.
Maximum number of parallel units: 6 units. CANbus cards type 3260301 needed for each unit (see accessories) max-
imum 30 no.
Length of bus line from unit 1 to the last unit max. 30 m. The cable length can be increased to 300 m using CANbus
cards type 3260301 (see accessories).
The terminals on the unit for the mains power supply are suitable for a maximum wire cross-section of 2.5 mm².
We recommend type F when using RCCBs. Refer to the provisions of DIN VDE 0100 Parts 400 and 500 when configuring
the rated fault current.
Note the electrical data when rating the in-situ mains power supply and fuse (C16A, max.10 units, with the exception of
Katherm HK 320 E).
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