FC BASIC User Manual
20/24
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6 FUNCTIONS
6.1 Fan demand operation
The fan will only be operated in the manually selected speed, if the regulator has detected a request for Heating or
Cooling. During dead zone the fan will be OFF. Through a DIP switch:
• dip switch 5 – universal models
• dip switch 3 – specific models.
you can select if the fan in cooling mode should run or not when the regulator is satisfied.
6.2 Hot Start
The Hot Start function prevents blowing a draught of cold air into the room during winter operation.
It means preheating of the exchanger (finned battery) before ventilation begins.
If a water sensor is present (not possible on remote H/C models) ventilation will only start if the water sensor detects a
temperature above 30 degrees. If this is not the case, it waits for consent from the sensor.
If there is no sensor, ventilation will always start after the 150 seconds delay time from valve opening.
PLEASE NOTE: if
• dip switch 3 = ON (universal models)
• dip switch 1 = ON (specific models)
the Hot Start delay is equal to zero (HS=0)
During the Hot start delay (through timer or water sensor), the red LED (heating) will Blink After the delay, when the fan
starts, the red LED will illuminate continuously.
This function is only enabled in heating mode.
The “temperature driven” Hot start function is only available on models with water sensor present for:
• 2-pipe installations with electric heaters set as integrated source (2° heating step)
• 4-pipe installations
The water sensor (analogue inputs) should always be mounted on the water pipe, upstream of the valve and as close as
possible to the battery. On a 4-pipe system, it must always be mounted on the hot water circuit, never on the cold water
circuit.
6.3 Periodic ventilation
Ventilation will be started for two (2) minutes at the end of the cycle to recycle air on the room air sensor if there has
been no ventilation in the last twenty (20) minutes.
This prevents stratification of the air in the room, which will falsify the room temperature reading.
6.4 Anti-frost
A heating regulation algorithm with a set point of 8 C° always remains active, ignoring water sensor consent and operating
mode. It always comes on if the temperature drops below 8 C°, even if the controller is switched off.
This prevents equipment inside the room from freezing.
A model with anti-frost function disabled is available on demand
Water sensor mounted upstream
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