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Manual Corrigo E Ventilation, revision M Chapter 5 Functional description 29
Inputs and outputs
1 2 3 4 5 6 Control modes
AI AI AI AI AI AI Supply air sensor
AI AI AI Outdoor temperature sensor
AI AI Room temperature sensor(s)
AI AI
Exhaust air sensor
AO AO AO AO AO AO Y1 Heating 0…10 V DC **
AO AO AO AO AO AO Y2 Exchanger 0…10 V DC **
AO AO AO AO AO AO Y3 Cooling 0…10 V DC **
AO AO AO AO AO AO Y4 Extra sequence 0...10 V DC
AO AO AO AO AO AO
Extra split Y1, Y2 or Y3 0…10 V
DC (optional)
AO AO AO AO AO AO
Y1 Heating/Y3 Cooling
Change-over (option)
DO DO DO DO DO DO Heating 3-pos. increase **
DO DO DO DO DO DO Heating 3-pos. decrease **
DO DO DO DO DO DO Exch. 3-pos. Increase **
DO DO DO DO DO DO Exch. 3-pos. decrease **
DO DO DO DO DO DO
Cooling 3-pos. increase **
DO DO DO DO DO DO Cooling 3-pos. decrease **
** Choose output type depending on the actuator type: Either AO 0…10V or DO 3-position
increase/decrease.
5.1.2 Heater types
5.1.2.1 Water heating
Control
When the unit is in running mode the heating valve is controlled by the analogue output ”Y1
Heating” or by two digital outputs “Heating 3-pos. actuator, increase” and “Heating, 3-pos. actuator,
decrease”.
Frost protection
The heater return water temperature is measured using the analogue input ”Frost protection sensor”.
Low temperatures will generate an internal, proportional signal that is used to force the heating
valve open thereby preventing freeze-up of the heater.
The internal signal (“Internal signal”) is 100 % when the signal ”Frost protection sensor” is equal to
or lower than “Alarm level”.
When ”Internal signal” reaches 100% or the digital input ”Frost protection” is activated, the unit is
shut down, the heating output is set to completely open mode and an alarm is activated. When
”Frost protection sensor” is higher than ”Alarm level” the signal declines linearly to 0 for ”Frost
protection sensor” equal to or higher than “Alarm level” + “Prop. Band”.
The frost protection alarm level is set in the menu Settings/Alarm settings/Alarm limit.