System Configuration Instructions; Working Modes; Mode Off - aldes DFE Série Manuel D'installation Et De Maintenance

IV. System configuration instructions

4.1 Working modes

The various working modes give the user the choice on how the airflow must be modulated according to your
application.
In all the working modes the supply fan will operate according to the assigned mode and parameters. The airflow of
the exhaust fan will then equal to a percentage of the actual airflow of the supply fan (noted %EXT / PUL for ratio
between exhaust and supply airflows).
The DFE control allows configuration of one of the following 4 modes, briefly described hereunder. For more
information consult the TAC technology section on our website.
•
CA MODE:
3 constant airflow assignments for the supply fan are determined by the user (m³h K1, m³h K2 et m³h K3).
•
LS MODE:
The assigned supply airflow is a function of a 0-10V linear signal. The user
defines the link with 4 parameters: Vmin, Vmax, m³h≡Vmin et m³h≡Vmax,
applied to the following diagram:
With m³h≡Vmin < or > m³h≡Vmax (positive or negative link)
Using the advanced setup, it is possible to stop the fans once the input signal
value has reached a certain upper and/or lower limit.
•
CPs MODE:
This mode can either be applied on the supply or the exhaust.
CPs on supply: the airflow of the supply fan(s) is modulated so as to maintain constant a certain pressure value
measured by a pressure sensor properly located in the ducting.
CPs on exhaust: the airflow of the exhaust fan(s) is modulated so as to maintain constant a certain pressure value
measured by a pressure sensor properly located in the ducting.
•

MODE OFF:

Is not a real working mode, it is a way to temporarily shortcut the CBr master setup. It allows, if working in CBr
master, to stop the fans with the RC. But then to restart the fans it is required to choose one of the other 3 working
modes.
38