Static Pressure Compensation On The Inlet - Airstream EXPERT 2V2SA User Manual

EXPERT 2V2SA
11.3. Static Pressure Compensa-
tion on the Inlet
A compensation can be used to ensure a cer-
tain uniformity in the static pressure level in
the room. This static pressure compensation
allows opening or closing inlets further when
the static pressure level gets out of range.
When the static pressure level exceeds the
normal range (above the Hi Pressure Set
point or below the Lo Pressure Set Point),
the controller waits for the Compensation to
make sure this unusual pressure condition is
not temporary. If the pressure is still out of
range after this delay has elapsed, the inlet
compensation (%) is applied on the opening
Static Pressure
Increase
inlet
opening
Hi Set
Point*
Keep
inlet
position
Lo Set
Point*
Decrease
inlet
opening
44
EXPERT 2V2SA, rev.10
Static Pressure Compensation
on the Inlet Opening
Comp. Comp. Comp.
Delay Delay Delay
of all inlets: they close further by their respec-
tive compensation value (%) when the pres-
sure level is too low [point A on the graph] or
open further by their compensation value (%)
when the pressure level is too high [point C
on the graph]. The controller then waits for
the Compensation once again. If the pres-
sure level is still out of range afterwards, the
opening compensation is applied once more.
This cycle is repeated up until the pressure
gets back in the normal range or until a new
stage starts. When the pressure level gets
back to the normal range [points B & D on
the graph], all inlets keep their compensated
position until the beginning of a new stage.
No compensation is applied on the inlet open-
ing when a new stage starts
This compensation will not be made if
the static pressure probe is defective.
Comp. Comp.
Delay Delay
Comp.
Time
Delay