Immergas EOLO Mini Technical Documentation Manual page 15

Technical documentation Technical documentation
FLUE CIRCUIT
- OPERATION
The products of combustion, after investing the water-gas exchanger (1), are conveyed to a diverter (5)
on top of which the flue extractor (3) is fitted.
Fan operation ensures forced expulsion of the flue and, at the same time, creates a vacuum in the sealed
chamber (2) so the combustion air can be extracted from outside.
Correct flue extraction is controlled by a special pressure switch (4), the operation of which enables or
prevents the burner from igniting.
- AIR/FLUE SAMPLING POINTS (6-7)
In the top part of the sealed chamber are two
sumps with screw closing.
These are accessible from the front and can be used
to sample combustion air (6) and flue (7).
- SIGNAL PRESSURE POINTS
FLUE PRESSURE SWITCH (8-9)
In the top outer part of the sealed chamber, two
pressure points are located.
These feature screw fastening and make it possible
to measure the signal at the ends of the flue
pressure switch (4).
The positive pressure point (8) is connected inside
the sealed chamber by means of a silicone pipe
(10).
In the same way, the negative pressure point (9) is
connected to a Y-pipe (11) which is in turn
connected to the draught diverter (5) and to the
negative pressure point of the flue pressure switch
(4).
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STEME ed 07/03 EOLO MINI