FC BASIC User Manual
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Index Description use
(dial
knob)
Potentiometer input:
Used to set the controller’s operating set point, between
a minimum of 5 C° up to a maximum of 35 C°.
-105° +105°
from average
point
Related topics: Set point dial knob and Range limitation
Note:
The presence of the water sensor is automatically detected by the controller during power start-up.
This means that functions like temperature driven Hot start, centralised On/Off (only 2-pipe models), periodic valve
opening (only 2-pipe models) will be activated or not, depending on the presence of the water sensor.
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.
3.5 Digital outputs
Digital outputs consist of 3 relays
Index Function Description
FAN Delivery fan control
(refer to Fan demand operation)
Starts ventilation. The fan control slider can be
used to set the phase on three different terminals
to permit manual selection of the 3 fan speeds.
OUT1 Valve or electric heater control
If there is a battery of electric heaters, this relay
pilots it; if not, it is used as a second valve for a 4
pipe installation.
OUT2 Valve control Permits water to flow into the battery.
3.6 Dip switch
The back of the electronic board (see photo) has 4 (or 6 in case of the universal models) dip switches, the functions of
which are listed below:
Relays
Water sensor mounted upstream
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