Operating Instructions

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Siemens RXB application library (KNX) RXB – Fan coil applications from FC-10, FC-11, FC-12, FC-13 CM110672en_05
Building Technologies 2BFNC03 – Two-pipe fan coil with changeover and electric reheater 2013-06-07
Application FNC03 includes the following functions
(refer to the description of functions CM110385 for detailed information):
Function Brief description)
Two-pipe fan coil..
– PI control.
– Proportional control sequence, selectable:
Only heating sequence, only cooling sequence or changeover.
– Control of thermal / electromechanic / motorized / analog valve actuators.
– Control of motorized KNX bus actuator valves.
– Valve exercising feature.
Electric reheater.
– 2-position or proportional control (AC 24 V on/ off or PDM) or analog (DC 0...10 V).
Fan control.
– Automatic (1...3-speed / analog)
– Manual with room unit.
Temperature measurement. – Room temperature sensor or
– Return air sensor.
Room operating modes. – Comfort, Precomfort, Economy and Protection mode..
– Change of operating mode via
/Auto switch on room unit, presence detector,
window contact or central command.
Setpoint shift.
– Locally via room unit or centrally.
General functions. – Presence detector.
– Window switch.
– Master/slave operation.
– Boost heating, night cooling etc.
– Free inputs/outputs.
Room units. Available with temperature sensor, setpoint adjuster,
button for /Auto and fan speed control, and LCD display.
Compatible controllers.
FNC03 is supplied with RXB22.1/FC-12 and RXB39.1/FC-13.
2 1 4 3
QAX...
R1
10385A02
T
17 18
M D1 GND D2 Y1 G Y2 B1
19 21 25 26 27
RXB22.1
N
L
Q13 Q14
N
Q24 Q34
28
KNX
M
B
B1
T
D1
2)
D2
2)
YHC.1
3)
4)
1 2 3
Q1
N
L
AC 230 V
N1
D4
T
22 23
24
Q43 Q44
6)
F1
7)
YR
Y1
G
Y2
YHC.2
3)
M
CP– CP+
CE– CE+
D3
2)
21
L
19
CE– CE+
2 3 4 5 6 7 8 9 13 14 15 161
N.C.
N.C.
Functions
Connection diagrams