In the same way, the analogue output (piloting the relative proportional 3-way valve) will assume a value
from 0 to 10V always depending on the temperature detected by the temperature control probe:
If the temperature difference between the value detected by the system water inlet probe and that detected
by the external air probe drops below the value set in the Input differential/free-cooling outlet (FC02)
parameter for the Input/free-cooling output time delay (FC03) the free-cooling ON/OFF output is
unexcited, while the free-cooling analogue output assumes the value of 0V.
The control probe for the management of the free-cooling free cooling 0÷10V analogue output/ free-cooling
relay is the temperature control NTC probe in cooling mode (evaporator input and output)
WARNING:
the free-cooling 0÷10V analogue output or the free-cooling relay are placed in OFF if the temperature
measured by the evaporator outlet probe/s of circuit 1/2 or common < unit is free-cooling mode anti-freeze
alarm prevention control set. The normal regulation starts when the temperature measured by the evaporator
outlet probe/s of circuit 1/2 or common > anti-freeze alarm prevention control set + the free-cooling anti-
freeze alarm prevention differential.
54.5 FREE-COOLING WORKING IN HEATING MODE
In heating working mode the digital output configured as free cooling ON/OFF valve will always be off, while
the analogue output configured as free cooling modulating valve will always be at 0V.
54.6 ANTI-FREEZE ALARM PREVENTION
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