CORRIGO VENTILATION 3.6 MANU

46 Chapter 5 Functional description Manual Corrigo Ventilation, revision V
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.
Regulator-
utsignal
Y1
Y2
Y3
Utsignal
0%
100%
Kompensation vid
kylbehov
Kompensation vid
värmebehov
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.
Frequency control SAF with EAF slave
The rotational speed of the supply air fan is controlled by a pressure transmitter which is placed in
the supply air duct. The extract air fan does not have a pressure transmitter, instead you let the output
for the extract air fan follow the control signal for the supply air fan. A scaling factor can be added if
the characteristics of the extract air fan are not the same as the characteristics of the supply air fan.
(Only pressure control of the supply air fan is possible using this function.) The extract air fan will
start directly at 50% after the start delay. Then the heating of the exchanger will work for this
operating mode as well. When the supply air fan starts, the extract air fan will be slave controlled by
the supply air flow.
Output signal
Cooling demand
compensation
Heating demand
compensation
Controller
output
10000
units
10000
units