CORRIGO VENTILATION 3.6 MANU

Manual Corrigo Ventilation, revision V Chapter 5 Functional description 35
Function to prevent the heat exchanger from freezing:
A temperature sensor, exhaust air, outdoor air or extra controller sensor can be used as a prevention
sensor. It is possible to set a starting temperature. This represents both the minimum time that the
function should be active, the supply air fan (SAF) and extract air fan (EAF) compensation, as well
as the minimum time before the next prevention cycle should begin. While the cycle is active, ”De-
icing” is shown in the display and in E tool
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.
Outdoor temp control of exchanger
Instead of using Y2 for analogue control of the heat exchanger it can be set to run on-off against
outdoor temperature. The function controls a digital output “Exch control”, which is activated when
the outdoor temperature falls below a set value.
Mixing dampers
Control
The analogue output signal ”Exchanger Y2”, or the two digital output signals "Exchanger 3-position,
increase" and "Exchanger 3-position, decrease", control two dampers for gradual mixing of outdoor
air and recirculated air. In this mode the output signal decreases with increasing heat demand.
CO
2
If demand controlled ventilation (see 5.4.2) is activated in combination with mixing dampers, and the
CO
2
-value rises above the setpoint value, the dampers will let in more outdoor air. The function is
controlled by a PI-controller. Factory settings: P-band 100ppm and I-time 100 seconds. These values
can only be changed in E tool
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.
CO
2
/VOC control can be used on ”Y2 exchanger” or ”Y4 extra sequence”. The control is selectable
for use on Y2, Y4 or on both outputs.
Minimum limit
An outdoor air minimum limit for can be set using the front panel. The limit value is settable between
0 and 100 %.
In- and outputs
Plate Rotating
Exch.
Liquid Dampers
AI
AI
AI
AI
Outdoor temp. sensor (optional, outd. temp start)
DO DO DO DO
Activate exchanger (optional, outd. temp start)
AI
AI
Deicing sensor (optional)
DI
DI
Deicing signal (optional)
DI
Rotation sentinel (optional)
Start delay exchanger
This function delays the exchanger start at start-up of the unit.
100 % exchanger output at start-up
After the delay described above, the exchanger output will be 100 % during the set time.