Immergas EOLO Star 23 kW, Техническая документация инструкция

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17
STESkW ed 05/06 EOLO Star 23 kW
Technical Documentation Technical Documentation
Electrical circuit.
Central heating phase.
Working with the room thermostat.
By selecting the (Winter) functioning mode with the (S2)
push button the boiler is enabled to work in the central heat-
ing mode.
When the room thermostat (S20) closes the integrated board
powers the boiler circulator (M1) by means of relay K3.
In the meantime, if the flue pressure switch (S6) contact is
idle “NC”, the adjustment circuit powers the fan (M20) by
means of relay K4.
If the following conditions occur: the system pressure switch
contact (S5) is closed (pressure in the primary circuit higher than
the minimum value) , the safety thermostat (E4) is enabled, the
flue pressure switch contact (S6) is in “NO” position and the
temperature read by the NTC delivery probe (B1) is below the
value set on the boiler’s control panel, then the P.C.B. energises
the request relay K2.
This operation causes the closing of the 2 contacts which starts
the ignition cycle, first of all supplying the ignition electrode
(E1) and then both the coils of the gas valve (Y1).
Burner ignition is detected by the integrated board by means
of the ionisation electrode (E2).
Remote digital control operation.
By selecting the Winter functioning mode on the Remote
Digital Control (CRD) panel, the boiler is enabled to work
in the central heating mode.
If the conditions detected by the CRD require ignition in the
central heating mode, the integrated board powers the boiler
circulator (M1) via the relay K3 and the burner ignites as
described above.
Note: With each switching off when the temperature is
reached, the integrated board stops the burner working in
the central heating mode for a time equal to that set with the
board parameters (see integrated board operation) .
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