Data Sheet for Application

Application Sheet
VAV081/VAV081_H
Supply and extract VAV with analog VAV controller, heating and
cooling coil and hot water radiator on triac output
DXR2..18-102A
2 / 8
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
A6V10662238_en--_d_--_01
Description
of functions
Basic functions
Options
• PID control for supply VAV, temperature and air
quality.
• The temperature and air quality (CO
2
) is measured in
the room operator unit.
• The application allows customers to adjust the room
temperature setpoints and rapid ventilation via the
room operator unit.
• Display of room air quality on room unit.
• The operating modes are Comfort, Pre-Comfort,
Economy and Protection.
• The air flow for heating and cooling is operated in
sequence to the valves. Parallel operation can be
configured.
• Supply VAV actuator 0…10 V.
• Extract VAV actuator 0…10 V.
• PID control LTHW radiator heating.
• Heating and cooling coils with 3-position valves
controlled by triac outputs.
• Downdraft compensation.
• Outside temperature (for downdraft compensation)
distributed over BACnet.
• 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
• Rapid ventilation.
• Air volume flow tracking for positive and negative room
air pressure.
• Air supply functions to coordinate demand signals for
pressure optimized fan control.
• Green Leaf (RoomOptiControl) function.
• Multisegment use of DXR2 automation stations with
VAV application.
• 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.
• PWM constant (incl. spring return) or PWM thermal
control can be selected for valves.
• Room operator unit and sensor variants:
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, 24 V,
DIN housing, 2 DI, 4 UI, 8 DO triacs, 4 AO 0…10 V
N9205
N9207
DXR2.E18-102A
DXR2.M18-102A
1
R1
KNX PL-Link room operator unit with sensors for
temperature, humidity, CO
2
, segmented backlit display,
touchkeys
N1602
QMX3.P74
1
YS
VAV compact controller, AC 24 V, DC 0...10 V, 5 Nm,
150 s, 300 Pa
N3544
GDB181.1E/3
1