CORRIGO VENTILATION 3.6 MANU

Manual Corrigo Ventilation, revision V Chapter 5 Functional description 39
If the outdoor sensor is located in the fresh air inlet duct and/or an extract air sensor is selected and
ALL the start conditions are fulfilled, free cooling is activated and will run for 3 minutes to ensure
that the temperature measurement when using an extract air sensor reflects the corresponding room
temperature and that the outdoor temperature sensor senses the outdoor temperature even if it is placed
in the fresh air inlet duct. If the outdoor sensor is not located in the fresh air inlet duct and a room
sensor is selected, the unit will not start free cooling as long as all the temperatures are not within the
start and stop temperature intervals.
After three minutes, the stop conditions will be controlled.
Stop conditions:
• Outdoor temp above the set max. value (18°C) or below the set min. value (condensation
risk, 10°C).
• The room temp/extract air temp. is below the set stop value (18°C).
• The timer outputs for "normal speed", "Extended running, Normal" or "External switch" are
On.
• It is past 07:00:00 in the day.
If any stop condition is fulfilled after three minutes, the unit will stop again. Otherwise, operation will
continue until a stop condition is fulfilled.
When free cooling is active, the fans run at normal speed or the set value for pressure/flow control.
An offset can also be entered for the fan setpoints during free cooling. The digital output ”Free cool
run” is active. The outputs "Y1 heating", "Y2 heat exchanger" and "Y3 cooling" are shut down. After
free cooling has been active, the heating output is blocked for 60 minutes (configurable time).
In- and outputs
AI
Outdoor temperature sensor or Intake temperature
AI
Room sensor or Extract air sensor
DO
Free cooling operation
5.1.7 Cooling recovery
If the cooling recovery has been configured, there is a cooling requirement and the extract air
temperature is a settable amount lower than the outdoor temperature, cooling recovery can be
activated. When cooling recovery is activated the heat exchanger signal will be reversed to give
increasing recovery on increasing cooling demand. The function also activates the heating function
“Free heating”: if heating is required and the outdoor temperature is higher than the extract air
temperature, outdoor air will primarily be used.
Output signals
Controller signal
0%
100%
Exchanger
Cooling
In- and outputs
AI
Outdoor temperature sensor
AI
Extract air sensor