Manual Corrigo E Ventilation, revision M
Chapter 5
Functional description
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5.1.2.4 Fast stop on overheating
If this function is active, the fans will be immediately stopped when there is an overheating alarm,
regardless of the set cool-down time.
Inputs and outputs
Water
heating
Electric
heating
AI
Frost protection sensor (optional)
DI**
Frost protection thermostat
(optional)
DI
High temp. limit switch
DI
Flow switch (optional)
**Frost protection can also be created using the digital input “Frost protection thermostat”.
Activation of the input will force the running mode to Off and an alarm will be activated. The
heating output is set to completely open, the remaining control outputs are set to zero.
Frost protection thermostat cannot be combined with shutdown mode.
5.1.3 Heat exchangers
The heat exchanger unit can be set to one of the following alternatives:
Plate exchanger
Rotating exchanger
Liquid connected exchanger
Mixing dampers
Plate exchanger
Control
The airflow through the exchanger is controlled by a shut-off damper and a by-pass damper. Both
dampers are controlled by the same analogue output ”Y2 Heat exchanger” or by two digital outputs
“Exchanger 3-pos. actuator, increase” and “Exchanger, 3-pos. actuator, decrease”, and are wired so
that one opens as the other closes.
Defrosting
De-icing is activated either when the digital input signal ”De-icing” is activated or when the value
on the analogue input ”De-icing Exchanger” falls below the de-icing limit (-3°C). It is deactivated
when the digital input is reset or the analogue input rises above the limit value plus a settable
differential.
On de-icing:
A PI-controller compares the de-icing setpoint with the signal ”De-icing Exchanger”. The lesser of
the output signal from this controller and the output from the ordinary controller is used as output to
the dampers.
