Corrigo ventilation 3.4 manu

Manual Corrigo Ventilation, revision R Chapter 5 Functional description 45
Regulator-
utsignal
Y1
Y2
Y3
Utsignal
0%
100%
Kompensation vid
kylbehov
Kompensation vid
värmebehov
Frequency control flow
Instead of giving a pressure setpoint value, it is possible to use an airflow volume value in m
3
/h. The
value from the pressure transmitter is recalculated to a volume flow using the formula below and the
fans will be controlled to give a constant flow.
Flow = K * P
X
Where K and
X
are settable constants dependent on the fan size and  P is the differential pressure,
measured in Pa, over the fan. Each fan has its own set of parameters.
X
is normally 0.5 indicating that the flow is proportional to the square root of the differential
pressure.
Outdoor compensation
Also when running flow control, it is possible to outdoor compensate the setpoint value.
The outdoor compensation is linear and is set using two parameter pairs which give the value of the
compensation at two different outdoor temperatures. The compensation can be positive or negative.
Using E tool
©
, you can also choose to only outdoor compensate the flow of the supply air fan. In
that case, the extract air fan is controlled using constant flow, independent of the outdoor
temperature.
The compensation can be selected to apply to both normal and reduced speed, or for normal speed
only (factory setting = both speeds).
Extra compensation curve
As a complement to the above outdoor compensation, there is a function called ”Extra
compensation curve” which can be used to set a compensation based on the room, extract air,
supply air or outdoor temperature. The curve has three parameter pairs which correspond to the
value of the compensation at three different temperatures.
Controller output-dependent extra compensation curve
The compensation is made using the control curve, one for heating demand and one for cooling
demand. It is possible to select whether the compensation (0...10000) should increase or decrease
the pressure setpoint. The 0...10000 compensation follows the current control quantity for the fans,
in this case pressure.
Output signal
Cooling demand
compensation
Heating demand
compensation
Controller
output
10000
units
10000
units
Output signal