Manual Corrigo Ventilation, revision R Chapter 5 Functional description 41
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.
The outdoor compensation is set using the menu Air control>Pressure contr. SAF/EAF>Pressure
contr. SAF/EAF>Down arrow.
Using E tool
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, 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 or
supply air 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...100) should increase or decrease the
pressure setpoint. The 0...100 compensation follows the current control quantity for the fans, in this
case pressure.
Frequency control manual
Frequency controlled fans can be controlled at a fixed rotational speed. The rotational speed is
selected by setting a fixed output signal (0 – 100%). Values for normal and reduced speed can be
configured for each fan.
Fans that are run with a fixed output signal can also be compensated (see the section above). In this
mode, pressure sensors are not needed.
Frequency control external control signal
Two 0…10 V input signals are used for direct control of frequency controlled fans. The signal is
received from e.g. a VAV unit. The signal controls the fans 0…100% (0…10 V on the analogue
output). Pressure transmitters are not used in this control mode.
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