Flue Pressure Switch - Immergas EOLO Star Export Manual

Technical documentation Technical documentation

- FLUE PRESSURE SWITCH (5)

This is positioned in the upper internal part of the sealed chamber and, by means of the special points,
detects the difference in pressure between the outlet of a special venturi pipe fitted in the fan exhaust
(negative signal) and the inside of the sealed chamber itself (positive signal).
The signal measured by the pressure switch varies according to the length of the intake/exhaust ends and
can be measured by means of the special pressure points on the top part of the sealed chamber (9-10).
When this trips, a switch (SV) is closed which controls the adjustment board and enables or prevents the
burner from igniting.
- FAN (3)
The extractor operates downstream of the combustion chamber and is physically "supported" by the top
part of the hood (2) from which is extracts the gases and conveys these into the exhaust pipes to which
the boiler is connected.
Inside the exhaust outlet, a venturi pipe (4) is fitted at the outlet of which, the negative signal of
the flue pressure switch (5) is detected.
This is controlled by the adjustment board and its operation essentially coincides with that of the burner.
11
STES ed. 07/01 EOLO STAR