Belimo VRP-M - System Description

www.belimo.eu Product information S4-VRP-M VAV • en • v2.0 • 11.2006 • Subject to changes 3 / 28
System components
Controller
VRP-M adaptive, digital PID VAV controller
for every application
Pages 7 ... 18
Sensor
Pressure sensors for static differential pressure measurement
– VFP-100 with 0 ... 100 Pa measuring range
– VFP-300 with 0 ... 300 Pa measuring range
– VFP-600 with 0 ... 600 Pa measuring range
Pages 19 ... 20
Actuator
– NM24A-V-ST damper actuator for standard applications
1)
– NMQB24-SRV-ST damper actuator for fast-running applications
1)
Pages 21 ... 24
1)
Please contact your Belimo representative for other actuator solutions, e.g. spring return.
Brief description
Application
This ready-to-connect system solution is an efficient control system for pressure-independent,
standard and fast-running air volume applications.
Field of application
The system can be used for controlled extraction of contaminated or slightly aggressive air
1)
in closed
rooms:
– Exhaust air systems for laboratory workplaces *
– Laboratories in chemical and pharmaceutical plants *
– Hospital buildings *
In combination with the NMQB24-SRV-ST fast-running actuator, this system is particularly suited to
laboratory applications *:
– Digesters *
– Extraction of contaminated air *
* Air compatibility verification essential (see «Technical data» for the VFP-... sensors, page 19).
Function
The pressure differential at the static pressure sensor is converted into a volumetric flow signal with
a linear throughflow and serves as the actual value x for the adaptive PID-VAV controller. The volu-
metric flow signal (0 ... 100% 
nom
) can be picked off at the VRP-M, controller connection U5, as a
0 ... 10 / 2 ... 10 V signal.
The actual value x is compared with the setpoint w set on the VAV controller and the connected
damper actuator is controlled according to the resulting system deviation. The VRP-M controller can
be controlled according to its function as a CAV constant controller (
min
/
max
) or a VAV controller via
the reference value input w with a modulating 0 ... 10/2 ... 10 V signal in the range from 
min
... 
max
.
Control inputs with OPEN/CLOSE/
mid
functions are available for special applications.
The VRP-M can be integrated into an MP system via the MP-Bus connection.
Ready-to-connect system solution for
• Pressure-independent VAV and CAV
systems, e.g. in laboratories
• Fast-running VAV and CAV applica-
tions, e.g. in digesters or generally for
extracting contaminated or slightly ag-
gressive air in closed rooms
Control:
DC 2 ... 10 V / 0 ... 10 V or bus
Integration into
• DDC controller with MP interface
• EIB Konnex systems
• LONWORKS
®
systems
Settings and diagnostics
with VRP-M-Tool
System description VRP-M VAV system
VRP-M
VFP-..
NMQB24-SRV-STNM24A-V-ST