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1.6
Gas connection.
Our boilers are designed to operate with methane gas (G20) or
LPG. Supply pipes must be the same as or larger than the 3/4"G
boiler fitting .
ATTENTION:
Before connecting the gas line, carefully
clean inside all the fuel feed system pipes
to remove any residue that could impair boiler
efficiency. Also make sure the gas corresponds
to that for which the boiler is prepared (see
boiler data nameplate). If different, the boiler
must be converted for operation with the other
type of gas (see converting appliance for other
gas types). The dynamic gas supply (methane
or LPG) pressure must also be checked accord-
ing to the type used in the boiler, which must
be in compliance, as insufficient levels can re-
duce generator output and cause malfunctions.
Ensure correct gas cock connection.
According to local regulations in force,
make sure that a gas cock is installed
upstream of each connection between
the appliance and the gas system. This cock,
if supplied by the appliance's manufacturer,
can be directly connected to the appliance
(i.e. downstream from the pipes connecting
the system to the appliance), according to the
manufacturer's instructions.
The Immergas connection unit, supplied as
an optional kit, also includes the gas cock,
whose installation instructions are provided
in the kit.
In any case, make sure the gas cock is connect-
ed properly.
The gas supply pipe must be suitably dimensioned according to
current regulations in order to guarantee correct gas flow rate to
the burner even in conditions of maximum generator output and
to guarantee appliance efficiency (technical specifications). The
coupling system must conform to standards in force (EN 1775).
ATTENTION:
the appliance was designed to operate
with combustible gas free of impurities;
otherwise it is advisable to fit special filters
upstream of the appliance to restore the purity
of the fuel.
Storage tanks (in case of supply from LPG depot).
- New LPG storage tanks may contain residual inert gases (nitro-
gen) that degrade the mixture delivered to the appliance casing
functioning anomalies.
- Due to the composition of the LPG mixture, layering of the
mixture components may occur during the period of storage in
the tanks. This can cause a variation in the calorific value of the
mixture delivered to the appliance, with subsequent change in
its performance.
11
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