4
used, the minimum extract air chamber pressure = Ext L
is active and the maximum extract air chamber pressure
= Ext H is active.
The Constant Flow function maintains a extract air flow
(only in the pressure transmitter model Vallox Exxeo
DPC). You can choose two limit values for the extract
air flow. The Low value specifies the minimum air flow
and the High value specifies the maximum air flow. If
analog control is used (0–10 VDC), the minimum air
flow equals 0 VDC and the maximum air flow equals 10
VDC. If digital control is used, the minimum air flow = Ext
L is active and the maximum air flow = Ext H is active.
Using the air flow temperature compensation function
requires installing the NTC 1 temperature sensor. The
temperature measurement NTC 1 is used to correct the
change due to the density of air in the air flow. The K
value is a model-specific value of the Vallox Exxeo roof
fan. An incorrect K value results in an incorrect air flow
measurement result.
1.2
Constant Flow menu
Press the Menu button to open the Constant Pressure
menu.
Use the Menu button to proceed to the setting mode.
Use the +/– buttons to select On or Off. Press Menu to
confirm the setting. Selecting Off takes you back to the
Constant Pressure menu.
If you select On, the Pressure Low
Setpoint menu for the extract air chamber opens in the
display. Use the Menu button to proceed to the setting
mode. Use the +/– buttons to set the desired value
(0–2,500 Pa). The minimum pressure cannot be higher
than the maximum pressure. Press Menu to confirm the
setting.
Use the + button to exit to the Pressure High Setpoint
menu for the extract air chamber. Use the Menu button
to proceed to the setting mode. Use the +/– buttons
to set the desired value (0–2,500 Pa). The maximum
pressure cannot be lower than the minimum pressure.
Press Menu to confirm the setting.
Use the + button to proceed to the return menu.
Use the Menu button to return to the Main menu. If the
status is active, there is a dot in the bottom right corner
of the display.
MANU
AL
+/
–
Menu
Menu
+/
–
+/
–
+
Menu
+/
–
Menu
Menu
Menu
Menu
