Data Sheet for Application

Application Sheet
FCU031/FCU031_H
Fan coil unit with staged fan, heating/cooling coil (2 pipe) on triac
output and electric reheater
DXR2..10-101A
1 / 7
Technical information in this document are subject to change. Drawings serve illustration purposes only.
Siemens is not responsible for content and any manual modifications.
2021-09-02
A6V10662235_en--_e_--_02
• Heating with LTHW and cooling with CHW changeover
• Modulating control of heating and cooling valve (2 pipe) on triac output and electric reheater
• Automatic or manual 3-speed fan control
• Room temperature and fan speed operation via KNX PL-Link room operator unit with temperature
measurement
Plant diagram
DXR2…
Room automation station
Q1
3-speed fan
B1
Extract air temperature sensor
R
Room
B3
Supply air temperature sensor
R1
Room operator unit with
D1
Window contact
temperature sensor
D2
Presence detector
YHC
Heating/cooling coil valve
D4
Over-temperature detector
YR
Electric reheater
Function diagrams
Heating/cooling valves
1-2-3-speed fan
Electric reheater, 1-stage
Chovr
Changeover
SpC
Effective cooling setpoint
C
Cooling sequence
SpH
Effective heating setpoint
H
Heating sequence
TR
Room temperature
Q
Fan output signal
Y
Output signal
Q1
Fan speed 1
YHC
Heating/cooling valve
Q2
Fan speed 2
YR
Electric reheater
Q3
Fan speed 3
100
Chovr
SpC TR [°C]
YHC YHC
0
SpH
Y [%]
H C
SpC
0
100
Y [%]
TR [°C]
YH
SpH
YC
Q1
Q [%]
Q2
Q3
0
100
Y [%]
TR [°C]
YH
SpH
YR