1592015610 User manual IC200D EVO GB rel1.0 10.11.2015_rev10 IC200D 105/192
If FS34=0 and FS35=0 this function is disabled.
Free cooling with compressors (CF77 = 3)
The compressors can be used to integrate the free cooling; if there are the conditions for free cooling the
adjustment is as showed below:
• if the regulation temperature is lower than St1 + FS37, the Free Cooling is performed only with the
resources of the Free Cooling; the reference set point is St1 and the differential is FS38. The
compressors remain off; it is active the maximum time to reach the set point, after which the
compressors are enabled to operate;
• if the regulation temperature exceeds St1 + FS37 for FS65 time, the compressors are enabled for
the regulation.
Regarding the chart below, the example assumes FS38 <ST07 <FS37.
Low temperature protection
If the temperature detected by probe selected with FS62 parameter is lower than FS63 set point, the free
cooling is disabled.
The free cooling will be enabled when temperature detected by probe selected with FS62 parameter is
higher than FS63 + FS64.
41.1 FAN SPEED CONTROL IF COMPRESSORS AND FREE COOLING ARE USED
FOR COOLING (CF77=3)
When the free cooling is not active the condenser fan speed is managed like standard regulation.
If free cooling is active:
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