Data Sheet for Application

Application Sheet
FCU044/FCU044_H
Fan coil unit with variable fan, heating and cooling coil (4 pipe) on
analog output
DXR2..09-101A
2 / 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_--_03
Description
of functions
Basic functions
Options
• PID control for heating and cooling.
• The 4 pipe system provides hot and chilled water for
the heating coil and the cooling coil.
• 0...10 V valves controlled by analog outputs for
heating and cooling.
• The fan is controlled manual on the room operator unit
or automatic with variable speed.
• The temperature is measured in the room operator
unit.
• The application allows customers to adjust the room
temperature setpoints via the room operator unit.
• The operating modes are Comfort, Pre-Comfort,
Economy and Protection.
• Change of operating mode via room unit, presence
detector, window contact or central command.
• The air flow for heating and cooling is operated in
sequence to the valves. Parallel operation can be
configured.
• Optimal energy efficiency by including the option for
room/supply air cascade control, presence detector or
window contact.
• Optional system alarms displayed on the management
station notify building operators of possible faults.
• Optional trends can be activated for room sensors.
Auxiliary functions
Variants
• Green Leaf (RoomOptiControl) function.
• Multisegment use of DXR2 automation stations with
fan coil unit application.
• Standard hot and cold water supply chain control.
• The application allows for control via centralized
commands (e.g. scheduler program for room operating
mode).
• Central optimum start control provides best room
comfort at the start of occupancy.
• Central operation or reset of setpoints, timed valve
kick function or outside temperature dependent
heating limit.
• Central override functions for valves.
• Seasonal compensation of room temperature
setpoints.
• The room temperature can be measured by:
o KNX PL-Link wall-mount sensor
o KNX PL-Link flush-mount room operator unit
o KNX PL-Link flush-mount sensors
o Analog extract air temperature sensor
• Presence can be detected by KNX PL-Link sensor or
binary sensor.
Siemens devices
Legend
Type of unit
Data sheet
Product No.
Qty.
DXR2…
Compact room automation station, BACnet/IP, 230 V,
flat housing, 1 DI, 2 UI, 3 DO relays, 3 AO 0…10 V
N9204
N9206
DXR2.E09-101A
DXR2.M09-101A
1
R1
KNX PL-Link room operator unit with temperature
sensor, segmented backlit display, touchkeys
N1602
QMX3.P34
1
YC
2-port, 3-port valve or 3-port valves with bypass, PN16
N4845
V..P45..
1
Electromotive actuator, AC/DC 24 V, DC 0...10 V
N4864
SSP61
1
YH
2-port, 3-port valve or 3-port valves with bypass, PN16
N4845
V..P45..
1
Electromotive actuator, AC/DC 24 V, DC 0...10 V
N4864
SSP61
1