FAN control for Heating mode
If POWER ON/OFF button is locked, it is not possible to switch the room controller ON or OFF locally with the button. But the ON/
OFF state can be changed by the Modbus communication.
ON FUNCTION
1. If the present temperature falls under 10°C (adjustable in Engineer mode and Modbus), a Heating valve opens to 100%. This
is active always, even when the room controller is off. In the 4-Pipe system (B or C), a Heating valve on terminal 4 activates.
In the 2-Pipes system (E), a valve output on terminal 2 activates. Anti-Freezing Protection is ON by default, but it is also
switchable to OFF in the Engineer mode and Modbus.
2. If the present temperature falls under PtCF (default 10°C), a FIRE icon and a HOUSE WITH THERMOMETER will be active on
LCD.
ANTI-FREEZING PROTECTION
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