User Manual

Application Sheet FCU031
Fan coil unit with staged fan, heating/cooling coil (2 pipe) on triac
output and electric reheater
DXR2..10-
101A
2 / 7
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
A6V10662235_en--_d_--_02
Description
of functions
Basic functions Options
∂ PID control for heating and cooling.
∂ The 2 pipe system provides hot and chilled water for
the heating/cooling coil.
∂ 3-position valves are controlled by triac outputs for
heating and cooling.
∂ The fan is controlled manual on the room operator unit
or automatic in 3 speeds.
∂ 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.
∂ Changeover managed by central functions distributed
over BACnet grouping.
∂ 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.
∂ 1-stage electric reheater on triac output.
∂ 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.
∂ 1…3 speed.
∂ PWM constant (incl. spring return) or PWM thermal
control can be selected for valves.
∂ 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, 4 DO triacs
N9204
N9206
DXR2.E10-101A
DXR2.M10-101A
1
R1 KNX PL-Link room operator unit with temperature
sensor, segmented backlit display, touchkeys
N1602 QMX3.P34 1
YHC 2-port, 3-port valve or 3-port valves with bypass,
PN16
N4847 V..P47.. 1
Motorized 3-positioning actuator for V..P47.., AC 24 V N4864 SSP81.. 1