17
INS
TALL
AT
O
RE
U
TENTE
MANU
TENT
O
RE
10
1
2
3
G
V
AC
AF
R
SC
M
4
1.8 INDOOR UNIT CONNECTION UNIT.
The connection unit is supplied as standard.
Perform the hydraulic and gas system connection of the device
in compliance with the instructions in (Fig. 10 according to the
type of installation to be made.
1.9 INDOOR UNIT GAS CONNECTION.
Our indoor units are designed to operate with methane gas (G20)
and LPG. Supply pipes must be the same as or larger than the
fitting.
ATTENTION:
Before connecting the gas line, carefully
clean inside all the fuel feed system pi-
pes to remove any residue that could impair
the efficiency of the indoor unit. Also make
sure the gas corresponds to that for which the
indoor unit is prepared (see data nameplate).
If different, it must be converted for operation
with the other types of gas (see converting
appliance for other gas types). It is also im-
portant to check the dynamic pressure of the
mains (methane or LPG) used to supply the
indoor unit, which must comply with EN 437
and its attachment, as insufficient levels may
reduce generator output and cause discomfort
to the user.
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 indoor unit was designed to operate
with combustible gas free of impurities;
otherwise it is advisable to fit special filters
upstream of the indoor unit to restore the
purity of the fuel.
Key:
V - Electrical connection
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic hot water inlet
SC - Condensate drain (minimum internal
diameter Ø 13 mm)
M - System flow
R - System return
1 - System filling valve
2 - System draining valve
3 - 3 bar safety valve drain fitting signal
4 - Air vent valve drain
