User Manual

Application Sheet FCU021
Fan coil unit with staged fan, heating/cooling coil (2 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.
2019-02-21
A6V10662231_en--_c_--_02
∂ Heating with LTHW and cooling with CHW changeover
∂ Modulating control of heating and cooling valve (2 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 Heating/cooling valves 1-2-3-speed fan
Chovr Changeover Q3 Fan speed 3
C Cooling sequence SpC Effective cooling setpoint
H Heating sequence SpH Effective heating setpoint
Q Fan output signal TR Room temperature
Q1 Fan speed 1 Y Output signal
Q2 Fan speed 2 YHC Heating/cooling valve
100
Chovr
SpC
TR [°C]
YHC YHC
0
SpH
Y [%]
H C