User Manual
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-pipe/2-stage heating or 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
- 4.13 Communication objects (S-Mode)
- 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
66 | 150 A6V11545892_en--_a
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, or heating and cooling mode
with changeover. 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)
T[°C] Room temperature
w Room temperature setpoint
YH Control command "Valve"
(heating)
YC Control command "Valve"
(cooling)
SDH Switching differential "Heating"
(P051)
SDC Switching differential "Cooling"
(P053)
X
dz
Dead zone (P055)
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
The diagrams below show the control sequence of modulating PI control.
Heating and cooling mode (P001 = 4)
T[°C] Room temperature
w Room temperature setpoint
YH Control command "Valve"
(heating)
YC Control command "Valve"
(cooling)
XpH Proportional band "Heating"
(P050)
XpC Proportional band "Cooling"
(P052)
X
dz
Dead zone (P055)
Heating and cooling
4-pipe application with
manual changeover
On/Off control
Modulating control:
3-position, PWM, or
DC 0...10 V