● Purge function together with 2-port valve
● Valve kick/exercising function to prevent gripping
● Reminder to clean fan filters
● Indoor air quality monitoring and controlling (CO
2
) via fresh air damper
(RDG204KN & RDG264KN)
● Start forced ventilation via fan button for bringing fresh air in the room
(RDG2..4KN)
● Black color versions (RDG200KN/BK & RDG260KN/BK)
● Delta temperature control
Limiting temperature difference between flow and return temperature for water
to optimize the system and reduce energy consumption in district heating
systems
● Power reserve clock for 20 h during power failure (RDG2..T)
● Min. and max. limitation of room temperature setpoint:
– Comfort limitation (min. and max. limitation)
– Energy saving concept (min. and max. limitation separate for heating and
cooling)
● Temporary Comfort mode extension
● Green leaf indication function (RDG2..KN)
● Display of current room temperature or setpoint in ℃, ℉ or both
● Absolute and relative setpoint indication (RDG2..KN)
● Display of CO
2
value in ppm (parts per million) or text (GOOD; FAIR; BAD:
RDG204KN & RDG264KN)
● Application selection via DIP switches or external commissioning software
(RDG2..KN: ACS, ETS and Siemens smartphone app PCT Go; RDG2..T:
Siemens smartphone app PCT Go)
● Parameter download with external commissioning software (RDG2..KN: ACS,
ETS and Siemens smartphone app PCT Go; RDG2..T: Siemens smartphone
app PCT Go)
● Reloading factory settings for commissioning and control parameters
● 1-speed, 3-speed or DC 0...10 V fan control on RDG20.. and RDG26..
(automatic or manual fan)
● Advanced fan control function, e.g. fan kick, fan start delay, selectable fan
operation (enable, disable, depending on heating/cooling mode, or min. and
max. speed setting)
● Fan start depending on fan coil temperature (heating) to avoid cool air while
heating
● Enabling fan output only in the 2
nd
stage (2-pipe/2-stage, 4-pipe/2-stage
(RDG2..KN))
● Enabling fan output only in the 2
nd
stage (2-pipe/2-stage (RDG2..T))
● Switching fan speed from manual to automatic in the dead zone to avoid
energy waste (selectable function)
● Swap function for 2-pipe and 2-stage application by switching the 1
st
stage
heating to 2
nd
stage cooling
● In 2-stage applications, limit the number of heating or cooling sequence to one
● Control of 6-port ball valve and for 6-port PICV, DC 0…10 V, DC 2…10 V and
inverted signals DC 10…0 V, DC 10…2 V (RDG26..)
● Control of 6-port ball valve as changeover (On/Off – open/close signal) and
PICV DC 0…10 V
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