For more than 60 years products from our house ensure the right temperatures. Through path- breaking developments in the field of refrigeration and air- conditioning engineering we have gained worldwide recognition.

Our product range covers unit air coolers, fan coils and finned heat exchangers. We only produce at our company located in Gerlingen near Stuttgart.

Fan Coil Units
Air Coolers
Heat Exchangers

To control the fan coil unit there are two controls available ex works. The Roller controller RCN 142, powered by kieback&peter and the Siemens controller RDG 100 series.

In the scope of delivery there are also different valves and sensors.

Siemens RDG series

Siemens RDG controllerThe Siemens RDG 100 is a energy- efficient controller for fan coil applications.

RDG 100 supports:

  • 3- speed fan 230 V 50/60 Hz max. 5 A
  • 3 On/ off control outputs 230 V 50/ 60 HZ max. 1 A  for:
    • Valve actuators
    • Electric heater
    • Compressor start signal
  • 3 operating modes:
    • Comfort
    • Economy
    • Protection

The improved model RDG100T is preconfigured with an automatic timer opertion mode that switches between comfort and economy mode. Additional an infrared remote control is available for the RDG100T model.

Roller RCN142-L-RO


RCN 142 controllerWhen you take control one step further the individual room controller is your preferred choice.

The controller offers a wide range of connection possibilities:

  • 3 speed fan
  • Continous valve actuator for cooling or heating water.
  • Binary commands, e.g. electric heaters, compressors.
  • Bus- compatibel: LON (further communication protocols are possible)
  • Continous output for EC- fans. (optional)

The controller supports all variants and combinations that are actually inside the portfolio of Roller's HKN fan coil units. The controller is preconfigured and tested to work with the fan coil unit. It can be integradted into the building automation by the LON protocol. The controller is configured by Roller for its designated purpose.

The RCN controller can either be combinated with the room control modul DDC111 or an infrared remote control.

The RCN-142-L-RO is listed as a eu.bac certified controller. The eu.bac cerfification is The European Certification System for Energy Efficiency in the range of Home and Building Automation and Services.

Circuit board for EC- fans (3 steps)

The circuit board can control stepless EC fans by a 0- 10 V signal. The 3 step 230 V ~ signal given by a common controller like RDG is transformed to an outlet voltage between 0 and 10 V. The oulet voltage can bet fitted to the needs by means of a trim- potentiometer already incorporated on the board. Now it is possible to combine common controls with latest energy saving EC technology. The circuit board can simply be mounted on a mounting rail.

Further controls

The implementation of further controls is available on request.