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Four-pipe fan coil with room supply air cascade
Plant diagram
N1
Room controller.
R1
Room unit with temp.
sensor.
B1
Supply air temperature
sensor.
D1
Window switch.
D2
Presence detector.
Q1
Fan (1... 3-speed).
YH
Heating valve.
YC
Cooling valve.
Operating diagrams
Y
Output signal.
TR
Room temperature.
SpH
Effective heating setpoint.
SpC
Effective cooling setpoint.
H
Heating sequence.
C
Cooling sequence.
YH
Heating valve.
YC
Cooling valve.
Q14
Fan speed 1.
F1
Fan speed 2.
Q34
Fan speed 3.
Siemens
Building Technologies
•
Heating with LTHW and cooling with CHW.
•
Modulating control of heating and cooling valve.
•
Room supply air cascade.
•
Automatic or manual fan control.
YC
YH
N1
K N X
R
Y [%]
H
100
YH
0
SpH
SpC
Y
H
Q34
Q24
Q14
SpH
SpC
RXB application library (KNX)
FNC08 – Four-pipe fan coil with room supply air cascade
B1
Q1
T
R1
C
YC
TR [°C]
C
TR [°C]
FNC – Fancoil-Applikationen aus FC-10, FC-11, FC-12
FNC08
K NX
D1
D2
CM110672en_03
R
27/52
30.11.2007
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