Manual Corrigo E Ventilation, revision M
Chapter 16
Configuration
85
Chiller groups: 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 step 1: 0 %
block step 2: 0 %
block step 3: 0 %
For a more detailed description, see section 5.1.4 Step controllers.
16.23.3 Step controllers Change-over
The digital output signals Heating/Cooling 1, Heating/Cooling 2 and Heating/Cooling 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.
16.24 Recirculation
Recirculation is a function for distributing the air in the room using the supply air fan. 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.
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 has its own setpoint. However, 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 group 5
to start recirculation:
No
Recirculation is activated either via a digital input signal or by connecting it to Timer output 5.
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