CORRIGO VENTILATION 3.6 MANU

48 Chapter 5 Functional description Manual Corrigo Ventilation, revision V
Minimum limit
For frequency controlled fans an adjustable minimum limit can be set individually on the supply air
and extract air fan control signals.
In- and outputs
1-speed 2-speed Pressure/
Flow
DO
DO
Start SAF Normal
DO DO
Start EAF Normal
DO
Start SAF reduced
DO
Start EAF reduced
DO
SAF frequency start
DO
EAF frequency start
DI DI
Indication/alarm SAF
DI
DI
Indication/alarm EAF
AI
Pressure transmitter SAF
AI
Pressure transmitter EAF
AI
Pressure transmitter 2 SAF
AI
Extra pressure transmitter SAF
AI
Extra EAF Pressure
AI
External flow setpoint
AI
Exchanger pressure
AO
Frequency converter SAF
AO
Frequency converter EAF
5.4.2 Demand controlled ventilation
In applications with varying occupancy the fan speeds or mixing dampers can be controlled by the air
quality as measured by a CO
2
sensor.
You can choose to activate the function "1. Always", "2. Only when the running mode is On", "3.
Only when the running mode is Off".
When the function is activated and combined with pressure controlled fans and the CO
2
value rises
above control value one the fans will start at reduced speed, if they are not already running. Should
the CO
2
value continue to rise the fan speed will also increase until the CO
2
value reaches control
value two at which point the fans will be running at normal speed. The fans will stop when the CO
2
value falls 160 ppm below control value one.