for the technician
Electronical regulation
POSSIBLE REGULATIONS ON THE MAIN P.C.B.
The SUPERMICRA models are equipped with a Microprocessor P.C.B., with an array of 6
microswitches (SW3 / 1÷6) which allow to make personalizing actions for the boiler’s functioning.
The firm arrangements are
underlined.
Remark: on some cases there may be 8 microswithes instead of 6 (SW3 / 1÷8). If so, microswitches
7 and 8 (shown shadowed in the picture) must be set
OFF.
Disconnect the power supply before approaching the microswitches. Restore the power
supply only after you have closed the back cover of the control panel.
Moreover, the changes of the microswitches haven’t effect until the boiler is electrically
connected.
SW3 / 1 – Natural gas Functioning = OFF. LPG Functioning = ON. The firm arrangement depends
on the gas type arranged for the boiler. For the GAS TYPE Changing it is necessary to follow
the complete instructions described in the previous paragraph “Changing Gas type”.
SW3 / 2 – In SUPERMICRA Boilers it must be
OFF.
SW3 / 3 – It determines the delay of 3 Minutes, before the new ignition after the overcoming of the
heating set temperature.
OFF = Delay ON (for normal systems or radiators); ON = Delay OFF
(for fan coil systems).
SW3 / 4 – It determines the extinction and new ignition temperature for DHW:
OFF = Burner OFF at
75°C and burner ON at 70°C; ON = burner OFF at the arranged temperature for DHW (T.SET)
+ 5°C, and burner ON at T.SET (this arrangement is suggested for water with a high percentage
of scale and not treated)
SW3 / 5 and 6 – Pump Functioning Way in Heating System:
5 OFF – 6 OFF: intermittent for normal applications (with or without delay, see SW3/3)
5 OFF – 6 ON: always turned off (with outside circulators)
5 ON – 6 Unimportant (OFF or ON): always on (for high thermic Inertia systems)
854_OFF_R00
ON
ON
OFF
SW3
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