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
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A6V11545892_en--_b
4.7.6.1 2-pipe/2-stage heating or cooling
In heating mode, the 1
st
stage is activated if the acquired temperature is below the
setpoint.
The 2
nd
stage is activated if the acquired room temperature drops below "setpoint"
minus "setpoint differential".
In cooling mode, the 1
st
stage is activated if the acquired temperature is above the
setpoint.
The 2
nd
stage is activated if the acquired room temperature exceeds "setpoint" plus
"setpoint differential".
For applications with 1-stage heating or 1-stage cooling only , the number of
controlled outputs is set via P200 (limit number of heating/cooling sequences).
With the swap function enabled, the 1
st
stage in heating (YHC1) switches to the 2
nd
stage in cooling. This function optimizes use of heating/cooling energy in systems
with different equipment. E.g., fan coil units combined with radiant heating/cooling
panels or floor heating/cooling. See Additional functions [➙ 45] to enable the
function via P254.
The diagrams below show the control sequence for On/Off control.
Heating mode (P001 = 0)
Cooling mode (P001 = 1)
Changeover (P001 = 2 or P001 = 3,
P254 = 0)
Changeover (P001 = 2 or P001 = 3,
P254 = 1) (swap function)
Changeove
r cooling
Changeove
r cooling
(YHC2: 1
st
sequence)
Changeove
r heating
Changeove
r heating
T[°C] Room temperature
w Room temperature setpoint
YHC1 Control command "Stage 1"
YHC2 Control command "Stage 2"
SDH Switching differential "Heating"
(P051)
SDC Switching differential "Cooling"
(P053)
w
D
Setpoint differential (P056)
Heating mode
Cooling mode
Swap function
On/Off output
Limit number of outputs