Connection Unit (Supplied As Standards With The Boiler) - Immergas EOLO Maior User Manual

1.3 Connection unit (supplied as standards
with the boiler).
Gas connection (Appliance category II
Our boilers are built to operate on methane gas (G20)
and LPG. Feed piping must be the same as or larger
than the 1/2"G boiler fitting. Before making the gas
connection, carefully clean inside all the fuel feed
system piping in order to remove any residuals that
could impair good boiler operation. Also make sure
the gas corresponds to boiler specifications (see
boiler dataplate). If different, the boiler must be con-
verted for operation with the other type of gas (see
unit conversion in case of gas change). It is also im-
portant to check the dynamic pressure of the gas
supply (natural gas or LPG) to be used for feeding
the boiler which must conform to UNI EN 437 and
relative attachments, as insufficient pressures can
reduce generator power, causing the user inconven-
iences.
Ensure that the gas cock connection is carried out
correctly, following the assembly sequence shown
in the figure. The gas supply pipe must be suitably
dimensioned according to current standards
(UNI7129) in order to guarantee correct gas delivery
to the boiler even in conditions of maximum genera-
tor output and to guarantee the unit's performance
(technical data). The coupling system must conform
to standards UNI 7129 and UNI EN 1775.
Gas quality. The unit is designed to operate with
fuel gas free of impurities; otherwise, suitable filters
should be installed ahead of the unit in order to re-
store fuel purity.
4
The kit comprises:
2 - 3/4" telescopic fittings
(R-M)
1 - 1/2" telescopic fitting
(U)
1 - 1/2" gas fitting (G)
1 - 1/2" ball valve
(E)
3 - Ø18 copper bend
2 - Ø14 copper bend
2 - adjustable expansion
plugs
2 - boiler support hooks
Seals and O-Rings
Key:
R - 3/4" System return
M - 3/4" System delivery
G - 1/2" Gas supply
U - 1/2" Domestic hot
water outlet
E - 1/2" Domestic water
inlet
V - 230V-50Hz Electrical
connection
).
2H3+
Key:
1 - Gas valve
2 - Biconical ring Ø 18
3 - Nut
4 - Gas pipe
Storage tanks (in case of feed from LPG tank).
- New LPG storage tanks can contain residuals of
inert gases (nitrogen) which weaken the mixture
delivered to the unit, causing anomalous opera-
tion.
- Due to the composition of the LPG mixture, layer-
ing of the mixture's components can occur during
the period of storage in the tanks. This can cause
a change in the heating power of the mixture deliv-
ered to the unit, with subsequent variation in its
performance.
Water connection. Before making the connections,
all system piping must be carefully cleaned to re-
move any residuals that could impair boiler efficiency.
In order to prevent scaling in the heating system, the
provisions contained in standard UNI 8065, concern-
ing the treatment of water in heating systems for civil
use, must be complied with. Water connections must
be made in a rational way, using the connections on
the boiler template. The boiler safety valve outlet must
be connected to a discharge funnel. Otherwise, the
manufacturer declines any responsibility in case of
flooding if the drain valve cuts in.
Important: to preserve the life and efficiency of the
domestic circuit exchanger, it is advisable to install
the "polyphosphate proportioner" kit in the presence
of water whose characteristics can give rise scale
deposits (in particular, and for example, the kit is
recommended when water hardness is higher than
25 degrees French).
Electrical Connection. The Eolo Maior @ boiler is
designed with IPX4D protection rating. Electrical
safety of the unit is guaranteed when correctly con-
nected to an efficient earthing system as specified
by current safety standards.
Caution: Immergas S.p.A. declines all liability for
damage or physical injury caused by failure to con-
nect the boiler to an efficient earthing system or fail-
ure to observe CEI reference standards.
Also ensure that the electrical installation corre-
sponds to maximum absorbed power specifications
as shown on the boiler dataplate.
Boilers are supplied complete with an "X" type power
cable without plug. The power plug must be con-
nected to a 230V±10%-50Hz mains with the correct
pole sequence L-N and the earth connection; the