Corrigo ventilation 3.4 manu

Manual Corrigo Ventilation, revision R Chapter 2 About Corrigo 13
Demand controlled ventilation
In buildings with strongly varying occupancy the fan speeds or mixing dampers can be controlled
by the air quality measured by a CO
2
sensor.
Support control
When using the control function room control or extract air temperature control, it is possible to
utilise support-heating and/or support-cooling.
Free cooling
When this function has been activated, it is used during the summer to cool the building during the
night using cool outdoor air thereby reducing the need to run chillers during the day.
Free heating
If the outdoor temperature is higher than the indoor temperature and there is a heating demand, the
recovery damper will not open for recovery but instead open fully for outdoor air. This may occur
during low night-time outdoor temperatures, when the room has been cooled considerably and the
outside heat is rising faster than indoors. This function is activated at the same time as “Free
cooling”.
Enthalpy control
Measures and compares the energy content (enthalpy) of the outdoor air and the extract air
(temperature and air humidity). When this function is active, the mixing damper signal will be
overridden to recirculation if the enthalpy is higher outdoors than indoors.
Pretreatment
Damper and pump control for preheating or precooling of the outdoor air via an underground intake
channel.
Cooling recovery
If the extract air is colder than the outdoor air and cooling is required, the heat exchanger control is
reversed in order to return the cool extract air.
Recirculation control
Recirculation of air using a supply air fan and (optionally) extract air fan and a recirculation damper
with or without temperature control. Used as a recovery function or during heating with support
control during the night. Recirculation control is available as an analogue or a digital function.
Step controllers Heating/Cooling
As an alternative to the analogue control of ”Actuator heating Y1” or ”Actuator cooling Y3” step
controllers can be used for controlling heating or cooling in steps using digital control.
Change-over
In 2-pipe systems where a combination heater/cooler is operating together with a heat pump,
Change-over is a function that enables using the same pipe for both heating and cooling, depending
on which is currently required. It uses the output Y1 Heating/Y3 Cooling.