Basic Documentation
Table Of Contents
- 1 About this document
- 2 Overview
- 3 Notes
- 4 Functions
- 4.1 Temperature control
- 4.2 Operating modes
- 4.3 Room temperature setpoints
- 4.4 Application overview
- 4.5 Power supply selection for RDG200KN
- 4.6 Additional functions
- 4.7 Control sequences
- 4.7.1 Sequence overview (setting via P001)
- 4.7.2 Application mode
- 4.7.3 2-pipe fan coil unit
- 4.7.4 2-pipe fan coil unit with electric heater
- 4.7.5 2-pipe fan coil unit with radiator or floor heating
- 4.7.6 2-stage heating and cooling
- 4.7.7 4-pipe fan coil unit
- 4.7.8 4-pipe fan coil unit with electric heater
- 4.7.9 Chilled/heated ceiling and radiator applications
- 4.7.10 Compressor applications
- 4.7.11 Applications with external AQR sensor or QMX room operator unit
- 4.7.12 Setpoints and sequences
- 4.8 Control outputs
- 4.9 Fan control
- 4.10 Multifunctional input, digital input
- 4.11 Handling system faults
- 4.12 KNX communications
- 4.12.1 S-Mode
- 4.12.2 Master/slave configuration in KNX S-Mode
- 4.12.3 LTE-Mode
- 4.12.4 Zone addressing in LTE-Mode (with Synco)
- 4.12.5 Master/slave configuration in LTE-Mode
- 4.12.6 Example of heating and cooling demand zones
- 4.12.7 Send heartbeat and receive timeout
- 4.12.8 Startup
- 4.12.9 Heating and cooling demand
- 4.12.10 Fault and alarms function on KNX
- 4.13 Communication objects
- 4.14 Communication objects (LTE-Mode)
- 4.15 Control parameters
- 5 Supported KNX tools
- 6 Connection
- 7 Technical data
- 8 Dimensions
- Index
Functions
Control sequences
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4.7.9.2 Chilled/heated ceiling with pressure independent
combi valve (PICV) and 6-port ball valve for
changeover (RDG260KN)
The RDG260KN is able to control a PICV for a chilled and heated ceiling
application together with a 6-port ball valve for changeover.
This application is only available, if the thermostat is set to a 4-pipe with 6-port ball
valve as changeover and PICV application (DIP1 & DIP4 = On, see Applications for
universal systems [➙ 42]).
This application is used for chilled and heated ceilings (4-pipes) with one heat
exchanger and differential pressure controller (using a PICV).
The control sequences (heating and cooling) are managed by one DC 0…10 V
signal (Y10), to be used with a combi valve.
A 6-port ball valve must be used for changeover.
Enable the flow limitation function (for PICV) via parameter P256 to balance
heating and cooling and avoid hydraulic problems caused by the different flow
rates (see Additional functions [➙ 45]).
T[℃] Room temperature
Y10 DC 0…10 V signal
W Room temperature
setpoint
YH Control command "Valve" (heating)
YC Control command "Valve" (cooling)
P256 Flow limitation function for heating only
Principle