Room thermostats for variable air volume (VAV)

RCU.. – room thermostats

Room thermostat

The thermostats are tailored to control the room temperature in individual rooms of ventilation, air conditioning plants that are heated or cooled with radiators, chilled ceilings, etc.

Typical use

  • Electric heaters

  • Thermic or electric valve actuators

  • Damper actuators


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RDU3.. – room thermostats

Room thermostat

The room temperature controller is tailored to control the room temperature in individual rooms of ventilation or air conditioning plants that are heated or cooled as well for valves and damper actuators with 0-10 V or ON/OFF demand controls.

Typical use

  • Control of 3-position valve or damper acuators


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RDG4.. – room thermostats

Room thermostat

The RDG.. room thermostats are very versatile. Thanks to their large display and intuitive operating concept with setting knob and large buttons, the units are extremely user-friendly and the backlit display even allows the unit to be operated in the dark. The required application can simply be selected via DIP switches before mounting the unit. The RDG.. uses for the room temperature control either a 2-position, P, or PI algorithm. 

Typical use

  • Control of chilled or heated ceiling with electrical heater, radiator, or floor heating

  • 2-stage heating or cooling applications

  • Additional function like remote temperature sensing for return air control, operating mode switchover to command energy saving mode, floor temperature limitation, dew point monitoring etc.


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