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12.6 Direct Free Cooling operation during cold resource alarm
With Direct Free Cooling enabled, it is possible to select whether or not to enable Free Cooling operation when a cold resource
alarm appears (compressors).
In particular, the parameter can be used to select the compressor alarm setpoint and band.
The setpoint and adjustment band values for all the types of units are in the "Free Cooling" menu, which can be accessed by
entering the "Service" password.
For the default values, see the parameters table.
12.7 Direct Free Cooling status display mask
Free Cooling status can be viewed at any time.
From the main mask, by pressing the [DOWN] key, the operator opens the following mask:
The image graphically describes the Free Cooling damper position:
The following values are also reported:
•
external air temperature (left of the image);
•
external air temperature (right of the image);
•
temperature difference (centre, above the image);
•
Free Cooling status (enabled or disabled);
•
damper position (internal only, mixing, external only) and the opening percentage.
Version 38
Direct FreeCooling
DeltaT
02.0
T.Int
T.Ext
25.0
23.0
Status: Enabled
Pos.:All Internal 000%
Damper in internal air only position.
Damper in mixing position
indoor and outdoor air.
Damper in external air only position.
170
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