Immergas EOLO Mini - Flue Pressure Switch

16
STEMkW Special ed 01/08 EOLO Mini kW Special
Technical DocumentationTechnical Documentation
Flue pressure switch (4).
It is located at the top, inside the sealed chamber and, by
means of the relative points, measures the dierence in pressure
between the fan output (negative signal) and the inside of
the sealed chamber itself (positive signal).
e signal measured by the pressure switch varies according
to the length of the aspiration/exhaust terminals and can be
measured by the relative pressure points located at the top of
the sealed chamber (9-10).
When this switch trips it causes a contact (S6) to close that
acts on the integrated P.C.B., enabling or preventing burner
ignition.
Intervention pressures
Flue pressure switch
ON
Head
(mm H
2
O)
OFF
Head
(mm H
2
O)
EOLO Mini 24-28 kW
Special
52 (5.3) 42 (4.3)
Fan (3).
e extractor works downstream from the combustion cham-
ber and is secured vertically to the top of the hood (2) from
where it extracts the fumes, conveying them to the exhaust
pipes to which the boiler is connected. It guarantees the ow
of air inside the sealed chamber at the same time.
It is controlled by the integrated P.C.B. and basically its ope-
ration coincides with that of the burner.