Swegon WISE - Constant Pressure Regulation

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WISE User Manual
Constant pressure regulation
Why constant pressure regulation?
Constant pressure regulation is used to give the subsequent duct
and room products optimal conditions. The pressure setpoint
value is set so that all underlying rooms receive their max. ow.
The most open room damper should, in this case, haver a degree
of opening of approximately 80%. This ensures that all rooms
receive air at the lowest possible energy consumption and the
lowest possible sound generation in the ventilation system.
In uniform smaller systems there is a possibility to pressure
optimize directly from the air handling unit without pressure
controlled zone dampers on the way.
For constant pressure regulation, a duct WISE Damper has the
task to maintain a constant pressure independent of the ow
that passes.
This is selectable if WISE Damper is to present a measured ow
or whether it should present an added ow, based on the under-
lying rooms in SuperWISE.
How is constant pressure maintained?
This is achieved by measuring the duct pressure, with WISE DPS
with the recommended placement two thirds out in the duct.
WISE Damper adjusts the pressure by closing or opening the
damper. In order to maintain a constant pressure, the ow is
also measured to use in ow balance calculations. Constant
pressure regulation can occur on the supply air (PS*) and
extract air damper (PE*). When using a WISE Damper with
pressure regulation, there is a possibility to set a maximum limit
for the air ow.
If the measured ow exceeds the maximum ow limitation, the
regulator starts and regulates according to the set maximum
ow until the air ow drops below the set value, the damper will
then return to pressure regulation again.
Group for constant pressure regulation
It’s possible to create groups for constant pressure regulation
on a zone level, which can be used for example in ring-fed duct
systems. This type of group can consist of one or more WISE
Dampers as well as one or more WISE DPS, both on the supply
air (PS) and extract air dampers (PE). For more detailed descrip-
tion and adjustable group parameters, see the section Group for
constant pressure regulation under Function groups.
WISE
DPS
WISE Damper
( PS)
WISE Damper
( PE)
WISE
DPS
ZON
Basic circuit diagram, Constant pressure regulation