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Siemens
RXB application library (KNX)
FNC – Fancoil-Applikationen aus FC-10, FC-11, FC-12 CM110672en_0
3
Building Technologies
FNC12 – Four-pipe fan coil with outside air damper
30.11.2007
FNC12
Four-pipe fan coil with outside air damper
KNX
R
•
Heating and cooling with LTHW and cooling with CHW.
•
Modulating control of heating and cooling valve.
•
Outside air damper for outside air supply.
•
Outside air temperature sensor via KNX bus.
•
Automatic or manual fan control.
Plant diagram
N1 Room
controller.
R1
Room unit with temp.
sensor.
B1
Return air sensor.
B2
Outside air temperature
sensor via KNX bus.
D1 Window
switch.
D2 Presence
detector.
D3
Safety thermostat, outside
air.
Q1
Fan (1… 3-speed).
YH Heating
valve.
YC Cooling
valve.
YM
Outside air damper.
1038
5S20
M
T
YM
B1
YC
YH
Q1
B2
N1
R1
D1
D2
T
D3
KNX
R
100
0
TR [°C]
Y [%]
SpH
SpC
YC
YH
H
C
10
38
5D
4
7
TO [°C]
Y [%]
SpC
100
0
SpEcm
SpFr
min
10
38
5D
4
8
YM
Operating diagrams
Y Output
signal.
TR Room
temperature.
TO
Outside air temperature.
SpH
Effective heating setpoint.
SpC Effective
cooling
setpoint.
SpEcm Economizer setpoint.
SpFr
Risk of frost limit
H Heating
sequence.
C Cooling
sequence.
YH Heating
valve.
YC Cooling
valve.
YM
Outside air damper.
Q14
Fan speed 1.
Q24
Fan speed 2.
Q34
Fan speed 3.
TR [°C]
Y
H
C
Q14
Q24
Q34
SpH
SpC
10
38
5D
4
9