50
|
Variable air volume controllers
Note
Terminal designations in accordance with the Belimo final controlling
element.
Brief description
Control solution for VAV single-room application,
VAV single-duct system, room temperature-controlled,
Stand-alone operation or integrated in a building
automation system (I/O integration)
Functions
The CR24-B1 single-room controller controls the
connected VAV controllers with a variable air volume
in the range from
min
…
max
, depending on the
room cooling needs. Other functions can be optionally
connected (e.g. with a motion detector): energy hold off,
standby, etc.
Room temperature controller
CR24-B1 (automatic) CR24-A1
Room temperature controller (15 … 36°C) with an
integrated or external temperature sensor
y
y
Mode selection with a pushbutton and three LEDs:
AUTO, ECO (reduced room temperature for standby or
night operation) and MAX (flushing operation with 15’
timer)
y
y
Room protection function (frost / excess temperature)
y
y
Inputs for energy hold off, standby operation, external
temperature sensor, summer / winter compensation
y
y
VAV system output
y
y
Self-resetting start-up and service function
y
y
Tool connection for diagnostics, settings and trend
recordings
VAV-Compact control device ..MV-D3-MP, VAV-Compact
control device for supply air, exhaust air or mixing units,
comprising a sensor, VAV controller and actuator for
pressure-independent air volume controls.
y
y
Damper position controlled via the MP-Bus for
demand based fan optimisation.
Note
For technical data and a detailed description of functions, see CR24
product information.
Function diagram
[V]
10
0
2
Y
W
K
W
H
ao1
X
P K
t
R
[°C]
EHO
CLOSED
min
max
Functions
Description
Assignment
VAV
VAV system output (0) 2 ... 10 V
Output ao1
Optional
functions
Description
Assignment
EHO
Energy hold off (window)
Input di1
Sensor
External temperature sensor NTC 5K
Input ai1
Shift
External shift 0 ... 10 V
(Summer / Winter compensation)
Input ai2
Configuration, settings
DIP switches
2 1
1 P-Band
normal
wide
2 di2
Stand by
Change over
Setpoint WH range:
15 … 36 °C
IRC-VAV
VAV room solution with CR 24 room controller
Single-duct systems
VAV singleduct system, room tempreture-controlled
Notes
y
y
Further VAV applications such as boost (fast heat up), night
cool down (air heated with water or electrically), night cool-
ing, combination available with chilled ceiling.
y
y
Mode setting for VAV controller for this application: 2 … 10 V
U
5
CR24-B1
EHO St-By
1
3
y
5
U
5
1
3
y
5
U
5
2
~
2
~
AC 24 V
1 2
7 8
6
ao1
1
U
5
2
4
di2
3
5
ai1/di1
ai2
VAV 2
2)
1)
VAV 1
0...10V
_
~
1)
Master-Slave
or
2)
parallel
External
temperature
sensor
External
shift
Wiring diagram
Input and output assignment
VAV-Compact
Conventional application
