Data Sheet for Application

Application Sheet
FCU041/FCU041_H
Fan coil unit with staged fan, heating and cooling coil (4 pipe) on
triac output
DXR2..10-101A
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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--_d--_01
• Heating with LTHW and cooling with CHW
• Modulating control of heating and cooling valve (4 pipe) on triac output
• 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
R
Room
B1
Extract air temperature sensor
R1
Room operator unit with
B3
Supply air temperature sensor
temperature sensor
D1
Window contact
YC
Cooling coil valve
D2
Presence detector
YH
Heating coil valve
Q1
3-speed fan
Function diagrams
Heating/cooling valves
1-2-3-speed fan
Q
Fan output signal
SpH
Effective heating setpoint
Q1
Fan speed 1
TR
Room temperature
Q2
Fan speed 2
Y
Valve output signal
Q3
Fan speed 3
YC
Cooling coil valve
SpC
Effective cooling setpoint
YH
Heating coil valve
SpC
0
100
Y [%]
TR [°C]
YH
SpH
YC
SpC
0
100
Y [%]
TR [°C]
YH
SpH
YC
Q1
Q [%]
Q2
Q3