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
4
A6V11545892_en--_b
75 | 170
4.7.6 2-stage heating and cooling
In 2-stage applications, the thermostat controls 2 valves or 2-stage compressors in
series:
● 2-pipe/2-stage: in heating or cooling mode or changeover (automatically or
manually). "Cooling only" is factory-set (P001 = 1)
● 4-pipe/2-stage: in heating and cooling mode or changeover (manually).
"Heating and cooling" is factory-set (P001 = 4)
Depending on the equipment, fan control needs to be started in the 2
nd
stage (in
the 1
st
stage, the fan remains Off) either in the heating or cooling sequence. To
cover the requested application, the fan can be enabled and disabled in different
sequences via P350. For further details, see Fan control [➙ 100].
In the 2-stage application (2-/4-pipe), with parameter P200 "number of
heating/cooling sequences", the number of outputs can be set to one cooling
sequence (P200 = 2) or one heating sequence (P200 = 3).
P200 = 1 (default)
2 sequence heating, 2 sequence cooling
P200 = 2
2 sequence heating, 1 sequence cooling
P200 = 3
1 sequence heating, 2 sequence cooling
Fan in the 2
nd
stage
Limit number of
heating/cooling sequence
2-stage heating or cooling