Data Sheet for Application

Application Sheet
FCU045/FCU045_H
Fan coil unit with staged fan, 6-way heating/cooling coil (4 pipe) on
analog output
DXR2..09-101A
1 / 6
Technical information in this document are subject to change. Drawings serve illustration purposes only.
Siemens is not responsible for content and any manual modifications.
2021-09-08
A6V10662231_en--_d_--_05
• Heating with LTHW and cooling with CHW changeover
• Modulating control of heating/cooling coil 6-way valve (4 pipe) on analog 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
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
Function diagrams
6-way valve
1-2-3-speed fan
C
Cooling sequence
X2
C
Cooling coil valve position for value X2
H
Heating sequence
X2
H
Heating coil valve position for value X2
Q
Fan output signal
Y
Valve output signal
SpC
Effective cooling setpoint
Y1
C
Cooling coil valve position for value Y1
SpH
Effective heating setpoint
Y1
H
Heating coil valve position for value Y1
TR
Room temperature
Y2
C
Cooling coil valve position for value Y2
X
Valve opening
Y2
H
Heating coil valve position for value Y2
X1
C
Cooling coil valve position for value X1
YC
Cooling valve
X1
H
Heating coil valve position for value X1
YH
Heating valve
0
100
X [%]
Y1
C
Y1
H
X1
H
X1
C
X2
C
Y2
C
X2
H
Y2
H
Y [%]
C
H
SpC
0
100
Y [%]
TR [°C]
YH
SpH
YC
Q1
Q [%]
Q2
Q3