NT-50906901-KSDR-ECOWATT-48-88-120-AN-170907
34/68
ENGLISH
Adjustment for use on ETD
CAV Menu
Stop
Low speed
High speed
Auto
CAV
Stop, Low Speed, High Speed
Auto = according to clock or status of the control terminal (start/stop +
PV/GV)
Comment: the control by terminals 31-32 / 33-34 is a priority.
8.3 Variable fl ow operation (VAV)
VAV
Recommended mode in mono zone confi guration for variable fl ow applications ac-
cording to a 0-10V signal
The fl ow set point value is a function of a 0-10 V signal stemming from an exterior sensor
(CO2, temperature, hygrometry, etc.) or a manual percentage.
Functional confi guration on ETD
Access to the simplifi ed confi guration menu (via password 1111) enables:
• The user range of the 0-10V signal to be selected (see example below)
• The variation range of the supply fan fl ows
VAV
VAV
Vmax
Vmin
Flow at Vmin
Flow at Vmax
2.00 V
7.00 V
1000 m3/h
2000 m3/h
Parameter
Ventilation
mode
Vmin, Vmax =
using range from the connected sensor
M3/h at Vmin, M3/h at Vmax =
supply air flow range
(m
3
/h)
800
Signal (V)
CO
2
(ppm)
VAV
2000
8
7
6
5
4
2
0
0
400
1000
1400
2000
10
1400
1600
1200
1000
1800
Example:
Wiring of a SCO2 sensor with a measurement range of 0-2000 ppm (0-
10V)
For use of the range of 400-1400 ppm, you must select Vmin=2V and
Vmax=7V
If we use the example with fl ows that must develop from 1,000 to
2,000 m
3
/h, we obtain a curve as shown opposite.
Note:
the use of the GV override entry allows the CO2 sensor to be overridden at the set point value m
3
/h
to Vmax (here 2,000 m
3
/h irrespective of the value measured by the sensor).
The selection of this mode in this installer menu automatically confi gures the user menu screen. The user
can therefore change the operating mode of the unit without touching the settings.
Adjustment for use on ETD
VAV Menu
Off
Manual 10%
A
10%
1371 m3/h
uto
VAV
user menu
Stop or Manual X % = manual adjustment of a fl ow corresponding to: Min
fl ow + X %[Max fl ow - Min fl ow]
Auto = used according to clock and status of the control terminal (start/
stop + sensor)
Comment: the control by terminals 31-32 / 33-34 is a priority.
