● Application selection via DIP switches or external commissioning software
(ACS, ETS and Siemens smartphone application PCT Go)
● Parameter download with external commissioning software (ACS, ETS and
Siemens smartphone application PCT Go)
● Reloading factory settings for commissioning and control parameters
● 1-speed, 3-speed or DC 0...10 V fan control on RDG20..KN and RDG26..KN
(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)
● 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 (2-/4-pipe), limit the number of heating or cooling
sequence to one
● Control of 6-port ball valve for chilled and heated ceiling, DC 0…10 V,
DC 2…10 V and inverted signals DC 10…0 V, DC 10…2 V (RDG26..KN)
● Control of 6-port ball valve as changeover (On/Off – open/close signal) and
PICV DC 0…10 V for
– Chilled and heated ceiling/floor (RDG26..KN)
– Fan coil application (RDG26..KN)
● Control of 6-port ball valve via KNX S-Mode objects (RDG20..KN and
RDG26..KN)
● Flow limitation function for PICV in heating mode (RDG26..KN)
● Set holiday period to reduce energy consumption during absences (holidays)
● 2 multifunctional inputs X1, X2, and 1 multifunctional input/output U1 set as
input, selectable for:
– Window contact switches operating mode to Protection
– Presence detector switches operating mode to Comfort
– Sensor for automatic heating/cooling changeover
– Switch for manual heating/cooling changeover
– External room temperature or return air temperature sensor
– Dewpoint sensor
– Enable electric heater
– Fault input
– Monitor input for temperature sensor or switch status
– Supply air temperature sensor
– Coil temperature sensor
– External temperature limit
– Hotel presence detector
● 1 multifunctional input/output U1 set automatically as output for:
– 4-pipe/2-stage as 2
nd
stage cooling output (RDG26..KN)
– IAQ control (damper and fan) (RDG204KN & RDG264KN)
● Selectable relay functions
– Switching off external equipment during Protection mode
– Switching on external equipment (e.g. pump) during heating/cooling
demand
– Output status heating/cooling sequence
– Dehumidification/humidification control output
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