solenoid valve using a
pressure gauge to
check the value.
in the direction of flow). •
open the emptying cock
(r) of the boiler. • open one or
more domestic hot water taps.
The diameters of the
nozzles and the pressure
values are shown on page
13 in the gas
characteristics table.
- check that the mechanism
If there is a risk of the
system freezing during your
absence, it must be emptied.
Draining the heating circuit
• Open the drain
cock provided at the
lowest point of the system. •
Open the boiler drain
screw (r) .
gas is suitable for the
type of gas supplied by the
distribution network.
However, to avoid this
operation, it is possible to add
antifreeze liquid suitable
for these types of system to
the heating circuit.
Emptying the DHW circuit •
close the
counter. • open one or
more hot water taps.
Note: For the correct
execution of the above
operations it is necessary
to contact the
Authorized Technical
Assistance Centre.
To operate the boilers with
another gas family, carry
out the following operations: -
replace the
burner nozzles; -
reset the gas
pressure by acting on
the stabilizer of the
Emptying the boiler • close the
isolation cocks (A), (B)
and (C) (the cut of the screw
must be perpendicular
31
Emptying
B
r
Other family of
gases
A
C
Machine Translated by Google
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