Corrigo ventilation 3.4 manu

Manual Corrigo Ventilation, revision R Chapter 5 Functional description 43
Digital humidity signal
A digital output signal, "Dehumidification/Humidification", can be used for on/off control of
humidifiers/dehumidifiers. The output signal has an activation value and a deactivation value which
are connected to the humidity controller output. The signal is activated when the humidity controller
output rises above the set activation value and is deactivated when the humidity controller output
drops below the set deactivation value.
If a start signal is needed for a cooling unit or a magnetic valve for DX dehumidification, the digital
output signal “Start P1-Cooling” should be used. In this case, the “pump” stop delay should be set to
0 s.
Inputs and outputs
AI
Room humidity sensor
AI
Duct humidity sensor
AO
Humidity control output 0…10 V DC
DO
Dehumidification/Humidification
5.4 Fan control
General
Fans can be 1-speed, 2-speed or variable speed via a frequency converter.
1-speed fans are controlled using the digital outputs "Start SAF-Normal" and "Start EAF-Normal".
2-speed fans are controlled using the digital outputs "Start SAF-Normal" and "Start EAF-Normal"
as well as "Start SAF-reduced" and "Start EAF-reduced" giving normal and reduced speed
respectively.
Variable speed control uses an analogue output per fan for controlling a frequency converter. There
are two setpoints for each fan, "Normal" and "Reduced". Pressure or air flow control can be used.
Variable speed fans can also be configured to be run with fixed output values.
Compensation curve
When running pressure control/flow control, it is also possible to temperature compensate the
pressure/flow.
The compensation can be dependent on the Supply air, Extract air, Room or Outdoor temperature.
Crosswise interlock
Crosswise interlock of fans can be configured, which e.g. means that if one fan stops, the other fan
will also stop.
Timer outputs, interlock at low outdoor temperatures
The fans are normally controlled by the timer channels for normal and reduced speed. At very low
outdoor temperatures, "2-speed fans" or "pressure controlled fans" can be forced to "reduced speed".
The limit temperature is settable and the function has a differential of 2K.
Normal and reduced speed
Units with 2-speed or pressure control fans are always started at "reduced speed". After a settable
time, Corrigo switches to "Normal speed" if normal speed is valid at start-up. When 2-speed fans
are switched from "Reduced speed" to "Normal speed", "Reduced speed" is first disengaged. About
2 sec later, "Normal speed" is activated.
When Corrigo switches from "Normal speed" to "Reduced speed", there is a settable retardation
time from disengagement to activation. See the section Retardation time.