C-Factor and Offset
C-Factor
The controller calculates how the air dampers should open and close in
order to achieve the required airflow.
A so-called C-factor, which is a value for resistance, is used in the
calculation. Utilizing the C-factor and the pressure in each air duct, the
controller calculates the flow in the air duct.
Offset
A balanced pressure, a positive pressure or a negative pressure can be
created in order to provide satisfactory ventilation in the room. Using a so-
called Offset value, the controller carries out a calculation in order to achieve
the required pressure in the room.
Pressure = SA1 + SA2 + Offset
The value 0 for Offset gives rise to a balanced pressure. A negative value for
Offset gives rise to a positive pressure whereas a positive value gives rise to
a negative pressure.
•
Balanced pressure = Just as much supply air as extract air.
•
Negative pressure = More extract air than supply air.
•
Negative pressure = Less extract air than supply air.
21
20210201 Swegon reserves the right to make design changes.
CONDUCTOR
W4
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