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STEEkW ed 01/06 EOLO Extra kW
Technical DocumentationTechnical Documentation
It lets the integrated board read the d.h.w. outlet temperature.
Its breakage is signalled by the flashing of LED 10 ( ) on the
boiler panel and error E06 is shown on the CAR display, the boiler
continues to work in the domestic hot water mode.
It is positioned at the end of the insulated hot water outlet pipe.
D.h.w NTC probe
(B2)
NTC probe
10 kohm 25 °C
It acts on the integrated board and enables boiler operation when
the flue are extracted correctly.
If it is closed with the fan off it does not enable start of the igni-
tion cycle.
Flue pressure switch
(S6)
Switching
contact
If the safety temperature is exceeded (105 °C) the burner switches
off.
It is positioned on the main exchanger outlet.
Safety thermostat
(E4)
Clicson thermo-
stat with normally
closed contact
It lets the integrated board detect the temperature of the primary
circuit delivery water.
If it breaks, burner operation stops in both the central heating and
domestic hot water mode.
It is positioned on the main exchanger outlet.
Delivery NTC probe
(B1)
NTC probe
10 kohm 25 °C
It is powered by the integrated board with a variable d.c.
With this the pressure of the gas to the burner can be varied.
Gas valve modulator
(Y2)
Loads.
It detects the external temperature and lets the board change system
delivery temperature according to it.
External probe
(B4) (optional)
PTC probe
1 kohm 25 °C
Depending on the position it allows:
= Circuit powered, the antifreeze and antiblock functions
remain active while the various post-circulation and post-ventilation
functions are terminated.
ON = CAR and d.h.w. operation (if CAR is not installed).
PROG. = D.h.w. and central heating operation (if CAR is not
installed).
RESET = Reset after either the ignition failure safety device trips
or in the case of an overtemperature, it allows the chimneysweep
function to be activated and to access boiler parameter setup.
Main selector switch (R10) Trimmer
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