Corrigo ventilation 3.4 manu

30 Chapter 5 Functional description Manual Corrigo Ventilation, revision R
5.1.1 Control modes
1. Supply air control
The supply air temperature is kept at the setpoint value by controlling the output signals for
"Heating Y1", "Exchanger Y2", "Cooling Y3", "Extra sequence Y4" and “Extra sequence Y5”. A
single PI control loop is used.
A neutral zone can be set around the setpoint value.
For example, if the setpoint is 18°C and the neutral zone is 2K, the setpoint for cooling will be 19°C
and the setpoint for heating will be 17°C (FI = 0K).
The setpoint value is set using the front panel or alternatively using an external setpoint device.
Alarms which are activated when the supply air temperature is too high or too low are active.
Alarm for control offset of the supply air temperature is active.
2. Outdoor temperature compensated supply air control
The supply air temperature setpoint is outdoor temperature compensated using a control curve with
8 node points.
The supply air temperature is kept at the setpoint value by controlling the output signals for "Y1
heating", "Y2 exchanger", "Y3 cooling", "Extra sequence Y4" and “Extra sequence Y5”. A single
PI control loop is used.
Alarms which are activated when the supply air temperature is too high or too low are active.
Alarm for control offset of the supply air temperature is active.
3. Cascaded room temperature control
Cascade control of room temperature and supply air temperature to achieve a constant, settable
room temperature. The room controller output signal generates the supply air controller’s setpoint
value.
One or two room sensors can be connected. If two sensors are connected the average of their values
will be used. The number of room sensors is detected automatically. The room temperature is kept
at the setpoint value by controlling the output signals for "Y1 heating", "Y2 exchanger", "Y3
cooling", "Extra sequence Y4" and “Extra sequence Y5”. Two PI loops are used.
The room setpoint value is set using the front panel or alternatively using an external setpoint
device.
4. Cascaded extract air temperature control
Cascade control of extract air temperature and supply air temperature to achieve a constant, settable
room temperature. The extract air controller output signal generates the supply air controller’s
setpoint value.
The extract air temperature is kept at the setpoint value by controlling the output signals for "Y1
heating", "Y2 exchanger", "Y3 Cooling", "Extra sequence Y4" and “Extra sequence Y5”. Two PI
loops are used.
The extract air setpoint value is set using the front panel or, alternatively, by using an external
setpoint device.
5. Outdoor temperature dependent switching between supply air temperature
control and room temperature control
When the outdoor temperature is lower than a settable limit (winter), outdoor compensated supply
air temperature control will be active, otherwise (summer) cascaded room temperature control.