2.2 Functions
The RDG2.. room thermostats are designed for use with the following:
Fan coil units via On/Off or modulating/DC control outputs:
● 2-pipe system
● 2-pipe system with electric heater
● 2-pipe system with radiator/floor heating
● 2-pipe/2-stage system also suitable for applications with 1-stage heating/ 2-
stage cooling, or 2-stage heating/1-stage cooling
● 4-pipe system
● 4-pipe system with electric heater
● 4-pipe system with a 6-port ball valve (RDG26..)
● 4-pipe system with 6-port PICV (RDG26..)
● 4-pipe system with PICV and 6-port ball valve as changeover (RDG26..)
● 4-pipe/2-stage system also suitable for applications with 1-stage heating/ 2-
stage cooling, or 2-stage heating/1-stage cooling (RDG2..KN)
Chilled/heated ceilings (or radiators) via On/Off or modulating/DC control
outputs:
● Chilled/heated ceiling
● Chilled/heated ceiling with electric heater
● Chilled/heated ceiling and radiator/floor heating
● Chilled ceiling and radiator/floor heating
● Chilled and/or heated ceiling/2-stage
● Chilled/heated ceiling (4-pipe) with 6-port ball valve (RDG26..)
● Chilled/heated ceiling (4-pipe) with 6-port PICV (RDG26..)
● Chilled/heated ceiling with PICV and 6-port ball valve as changeover (RDG26..)
Compressor applications via On/Off control:
● Heating or cooling, compressor in DX-type equipment
● Heating or cooling, compressor in DX-type equipment with electric heater
● Heating and cooling, compressor in DX-type equipment
● Heating or cooling/2-stage, compressor in DX-type equipment
● Weekly scheduler
● M/S - manager/subordinate function between thermostats (RDG2..KN)
● Room temperature control via built-in temperature sensor or external room
temperature/return air temperature sensor
● Room relative humidity control via built-in humidity sensor or external room
humidity sensor (humidity function can be disabled.) (RDG2..KN)
● Min./max. humidity control by shifting temperature setpoint and releasing
contact for dehumidifier/humidifier (RDG2..KN)
● Floor heating temperature limitation
● Min. and max. supply air temperature limitation
● Selection of operating modes via operating mode button
● Button lock for all buttons independently (automatically or manually)
● Changeover between heating and cooling mode (automatic via local sensor or
bus, or manually)
● Parameters protected by password (disabled by default)
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