Siemens RDG200KN Basic Documentation page 72

Functions
4
Control sequences
4.7.9.1 Chilled/heated ceiling with 6-port control ball valve
Principle
Control output
configuration
Fan control
72 | 150
(RDG260KN)
The RDG260KN is able to control a 6-port control ball valve for a chilled and
heated ceiling application.
This application is available, if the thermostats are set as 4-pipe with 6-port ball
valve applications (DIP4 = ON, see Applications for universal systems [➙ 39]).
Only one signal DC 0...10V (Y10 output) is used to control the 6-port control ball
valve for heating and cooling.
Kv
Y H
W
Hydraulic and control diagram of the 6-port control ball valve
W Room temperature setpoint
YH Control command "Valve" (heating)
YC Control command "Valve" (cooling)
Kv Vale flow
Default integral action time TN is set to 45 minutes.
If the thermostat is set to control sequence "H/C ceiling with 6-port control ball
valve", only output Y10 can be used to control the 6-port control ball valve.
Output voltage range of Y10 can be configured via P201. For details, see Overview
[➙ 78].
P201 = 6 6-port valve (DC 0...10 V control signal)
P201 = 7 6-port valve (DC 2... 10 V control signal)
P201 = 8 Inverse signal, 6-port valve (DC 10... 0 V control signal)
P201 = 9 Inverse signal, 6-port valve (DC 10... 2 V control signal)
If the thermostat is set to control sequence "H/C ceiling with 6-port control ball
valve", fan control is set to disable and cannot be changed.
Parameter P350 (Fan control) is set to 0 and cannot be changed.
YC
Y
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