for the technician
EXCLUSION OF AUTOMATIC BY-PASS
The boiler is factory equipped with an automatic By-
pass valve. When it’s completely open it guarantees a
flow that’s enough for boiler’s normal work, without
causing the intervention of safety devices. It’s possible,
anyway, to exclude it as follows:
1. Turn off the boiler by turning the Summer/Winter
selector on central (0) position.
2. Turn the screw on the By-pass (see picture) until
it’s in the position shown in “B”.
To turn the By-pass back in the original, automatic
working mode, turn the screw until it’s in the position
shown in “A”.
PUMP’S SPEED
The pump has a selector which allows to reduce the
speed, so as to reduce the noise produced by the too
rapid circulation of the liquids in too small heating
systems.
III = Maximum Speed (Firm Set up)
II = Medium Speed
I = Minimum Speed
A
B
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