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
80 | 170
A6V11545892_en--_b
4.7.7 4-pipe fan coil unit
In 4-pipe applications, the thermostat controls 2 valves in heating and cooling
mode, heating/cooling mode by manual selection. Heating and cooling mode (P001
= 4) is factory-set.
The heating or cooling output can be released via operating mode button if P001 is
set to Manual (P001 = 3).
The diagrams below show the control sequence for On/Off control.
Heating and cooling mode (P001 = 4)
Heating mode with manual selection
(P001 = 3) or
energy saving (P010 = 2 & P014) in
heating sequence
Cooling mode with manual selection
(P001 = 3) or
energy saving (P010 = 2 & P015) in
cooling sequence
T[°C] Room temperature
YH Control command "Valve"
(heating)
w Room temperature setpoint
YC Control command "Valve"
(cooling)
X
dz
Dead zone (P055)
SDH Switching differential "Heating"
(P051)
SDC Switching differential "Cooling"
(P053)
Heating and cooling
4-pipe application with
manual changeover
On/Off control