ASV115
4/13
www.sauter-controls.com
cqV.s
10V
100%
0
0
Vmin
Vmax
Vnom
0
5
10V
5
V
r qV
B
116
94
10V
100%
r qV
0
0
V
Vnom
B
1
169
3
damper position
Command signal c
qV.s
can be configured in various modes via the
software. Ranges 0…10 V, 2…10 V and free configurable are
available. This relates to the 0…100%
nom
range.
As standard, the following functions are specified by the factory
setting for 24 V~ operation of the controller.
Forced operation* AI01
Designation
Range 0…10 V
Range 2…10 V
Function
NC = not connected
-0.69 V
-0.69 V
min
LOW voltage
-0.5…0.3 V
-0.5…2.2 V
Damper closed
NORMAL voltage
0.7…9.8 V
2.2…9.8 V
Control range (
var
)
HIGH voltage
10.2…11 V
10.2…11 V
Control range (
var
)
OVER voltage
> 11.4 V
> 11.4 V
Damper open
*) Switching hysteresis is 0.4 V (4%)
as the default value
Seepage suppression
In order to avert unstable control behaviour around the
min
, so-
called 'seepages' are suppressed automatically. This suppression
causes the damper to close if command variable (c
qV.s
)
6% of the
set nominal air volume.
Control resumes when the command variable (c
qV.s
)
7.8% of the
nominal air volume.
Functional diagram c
qV.s
Feedback for damper position (AO02) and actual value for air
volume (AO03)
Three measured variables are generally available as a feedback
from the air volume control loop: damper position, air volume and
operating pressure. These values can be read with SAUTER CASE
VAV software in the
Online
monitoring
mode.
Online monitoring
Damper position
° Angle of rotation
0…100% angle of
rotation
Actual air volume
m³/h
0…100%
nom
Operating pressure
Pa
0…100% P
nom
The feedback signal for the damper position can be transmitted as
an analogue signal via terminal AO02. The value equates to
0…100% of the maximum permitted angle of the damper.
Functional diagram for damper position
The function can be set using Sauter CASE VAV 1.4 or higher,
which allows one of the following applications for the device to be
selected: VAV.10.001.M, VAV.20.001.M or VAV.20.001.Sxi. When
setting the parameters for terminal AO02 using the feedback signal
for the damper position, it is recommended to perform an adaption
using
Manual mode – adapt angle of rotation
. This determines the
angle between the 'closed' and 'open' damper positions.
In general, the actual value of the damper position is used for the
following functions:
Display on the BMS, for the purpose of monitoring the primary
pressure.
Fan control as a function of the various damper positions in the
installation.
In addition, the current air volume (actual value r
qV
) across the air
volume box is measured at terminal AO03. The value corresponds
to 0…100% of the set nominal air volume
nom
. If no specific plant
air volume is entered,
nom
corresponds to the value
nAT
set by
the box manufacturer, which can generally be found on the specifi-
cation plate of the air volume box.
Functional diagram for r
qV
The form of output signal r
qV
can be configured in various modes
using the SAUTER CASE VAV software. Ranges 0…10 V, 2…10 V
and 'free configurable' are available.
The actual value signal and the command signal always relate to
the set air volume
nom
.
Note
Actual value signals from two or more controllers must not be
connected together.
The actual value signal for the air volume is generally used for the
following functions:
To display the air volume on the (BMS)
Master-slave application; the actual value signal from the master
controller is specified as the setpoint for the slave controller.
The actual value signal r
qV
can be used to calculate the current air
volume. For this purpose, the voltage is measured on output AO03
and is offset against the set nominal air volume.
