Corrigo ventilation 3.4 manu

96 Chapter 17 Configuration Manual Corrigo Ventilation, revision R
Nbr of steps: 3
Minimum on/off-
time: 60 sec
Hyst: 0.5 %
When DX cooling is used in conjunction with pressure controlled or flow controlled fans it
is possible to block DX cooling if the supply air fan control signal falls below a preset
values. The blocking level is individually settable for each DX cooling step.
At lower SAF output
block step1: 0 %
block step2: 0 %
block step3: 0 %
For a more detailed description, see section 5.1.4 Step controllers.
17.25.3 Step controllers Change-over
The digital output signals "Heating/cooling step 1", "Heating/cooling step 2" and "Heating/cooling
step 3" are used for step controllers during Change-over control (see section 5.1.12). They have the
same functions as other step controller outputs, but are set to either heating or cooling depending on
whether heating or cooling is required. In other words, when heating is active, they will follow the
settings for "Heating 1-3" and when cooling is active they will follow the settings for "Cooling 1-3".
17.26 Recirculation
Recirculation is a function for distributing the air in the room using the supply air fan. The extract
air fan can also be used, if desired. The function can be used even when there is no heating or
cooling demand. When using recirculation control, the extract air fan stops and a recirculation
damper opens which allows the air to circulate through the unit.
Either a digital output (Recirculation damper) or an analogue output (Y4 Extra sequence) can be
used as an output signal. When Y4 Extra sequence is used, the damper will become modulating.
Enable temp
control when
recirculation
No
Recirculation control can be configured as either air circulation (temperature control inactive) or air
circulation with temperature control. (Only heating, only cooling or both heating and cooling.)
Recirculation control can either have a unique setpoint or follow the supply air setpoint, with an
adjustable offset. The other settings are the same as for normal operation, i.e. if normal operation
has been configured as room control, room control will also be used during recirculation.
End recirculation
control when room
temp exceeds:
25.0°C
If the room temperature rises above the set limit value, recirculation will be stopped.
Enable free cool
when recirculation
No
To lower the temperature, it is possible to configure free cooling to be used during recirculation, if
the conditions for free cooling are fulfilled.
Use extra time
group5 to start
recirculation: No