FC BASIC User Manual
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When the function mode is selected automatically depending on the difference between ambient temperature and the set
point temperature, this is referrred to as an automatic DEAD ZONE change-over with lateral band.
Switching between heat and cool settings takes place automatically as illustrated below.
5.1 Regulation algorithm
FC Basic controls utilities on the basis of consents (determined as explained above) and the status of the temperature
controller. The latter is a set point function that can be set using the scaled knob.
In a two-pipe installation the regulation algorithm is configured:
• For the Dead zone if there are electric heaters in regulation (or INTEGRATED AND AUTOMATICALLY ADJUSTING) and
there is no local / remote heating/cooling selection.
• For Summer/Winter if there is a water sensor or local / remote heating/cooling selection (refer to operating mode
slider and Remote Heating/Cooling)
In a four-pipe installation the regulation algorithm is configured:
• For Summer/Winter, if there is a local / remote heating/cooling selection (refer to operating mode slider and Remote
Heating/Cooling).
• For the Dead zone, in all other cases.
The hysteresis and the Dead zone band, are determined by
• dip switch 4 – universal models
• dip switch 2 – specific models.
5.1.1
Utility control
• Operating modes (heat / cool) are affected by the consent to the water sensor, if present, for 2-pipe system models.
If both water heating and supplementary electric heaters, set as integrated source, are both available, the electric
heaters will be added as a second step separated from the first step by a distance equal to the neutral band
(operation of INTEGRATED AND AUTOMATICALLY ADJUSTING electric heaters is more complex. See the relative
section).
•
• If there are electric heaters set as regulation, heat is regulated only with electric heaters and corresponds to the
“heat” step in the diagrams.
• Dip switch:
• dip switch 5 – universal models
• dip switch 3 – specific models.
may be used to select whether the fan is On or Off once the required temperature has been achieved in cooling
mode; in heating mode it will always be off.
If there is a water sensor, and it does not give consent for cooling operation and the regulation algorithm is set to cooling
operation, the fan the fan is switched off respecting the time of 1 minute for post-ventilation in the specified cases (see
related paragraph).
Configurations with no heating/cooling slider (operating mode slider) must have four pipes or electric heaters set as
regulation or a water sensor.
Automatic DEAD
ZONE change-over
FF
eat./risc.
set-point
room temp.
temp.ambiente ˚
hysteresis/isteresi
ool./raff.
hysteresis/isteresi
band/banda
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