17
Katherm QK nano –
Ultra-small trench heater with EC tangential fan
4.42
Ready-to-install convector-based floor trenches
Assembly and installation instructions
10.3 230 V electromechanical electrical model
The required room temperature is set on the room thermostat. If this falls below
the set value, the tangential fan starts up at the set speed and the thermoelectric
actuator valve opens the water-side valve.
If the speed controller is switched to zero (Off), only the water-side valve opens
(natural convection operation).
Room thermostat with infinitely continuous fan speed setting, in a flat surface-
mounted housing, white, with thermal feedback; for the continuously variable
parallel control of max. 10
Ka
therm
QK nano 230 V electromechanical models,
room temperature and fan presetting using dials; temperature setting range
5 - 30°C; IP 30 rated, voltage 230 V/50 Hz, max. current load 4 A, switching
difference 0.5 K, temperature drop approx. 4 K, fuse and EMC in line with DIN EN
60730
Dimensions W x H x D: 78 x 83 x 27 mm
1
Dial for temperature setting
2
Dial for fan speed setting
Fig.: Room thermostat
1
2
Cabling - BMS control
Trench heating
Katherm QK nano
230
V / 0-10 VDC
Mains power
230 VAC
Fuse by others
actuator type
146906
Automation station
* Lay shielded cables (e.g. IY(ST)Y, 0.8 mm), separately from high-voltage cables.
W1: Power supply
W2: Control signal for fan and actuator
Subject to technical modifications: Refer to the control accessory documentation
in the event of deviation from the circuit diagrams!