User`s manual

INSTALLERUSERTECHNICIAN
44
1.3 Connection unit (supplied standard with the
boiler).
Gas hook-up (Appliance category II
2H3+
). Immergas
boilers are designed to operate with the following
types of gas: natural gas (G20) and LPG. Delivery
pipelines must feature the same or larger diameters
as the 1/2"G boiler fitting.
Before hooking up the gas line, ensure that all system
fuel pipelines are perfectly clean, and remove all re-
sidue that could impair appliance efficiency.
Also check that the gas corresponds to boiler
specifications (see boiler dataplate). If the types are
different, the appliance should be converted for
operation with the specific type of gas required (see
converting the appliance for other gas types).
The gas pressure must also be checked (natural or
LPG) according to the type used in the boiler;
insufficient levels could reduce generator power and
malfunctions. Ensure that the gas valve connection
is correct as shown in the assembly sequence in the
figure.
Water connection. Before making the water
connections, all system piping must be cleaned
thoroughly to remove any residue that could impair
boiler efficiency. Water connections must be made
in a rational sequence using the couplings 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.
Electrical Connection. The Zeus Maior boiler is
designed with IPX4D protection rating. Electrical
safety of the unit is guaranteed only when it is
correctly connected to an efficient earthing system
as specified by current safety regulations.
Caution: Immergas S.p.A. declines any responsibility
for damage or physical injury caused by failure to
connect the boiler to an efficient earthing system or
failure to observe CEI reference standards.
Also ensure that the electrical installation
corresponds 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 cable must be connected to a 230V-50Hz
mains supply with the correct pole sequence L-N and
earth connection ; the mains power supply must
also be equipped with a multi-pole circuit breaker with
contact opening gap of at least 3 mm. In the event of
power cable replacement, contact an Authorized
Immergas Service Centre for assistance.
The power cable must be laid as shown in the figure
on page 5.
In the event of mains fuse replacement on the control
card, use a 2A quick blow fuse. For the main power
supply to the appliance, never use adapters, multi-
ple sockets or extension leads.
N.B.: when connecting the appliance, if the correct
L-N polarity is not followed, the boiler does not detect
the flame and inhibits lighting. Also whenever L-N
polarity is not followed, if the neutral is live with
residual voltage over 30V, the boiler will probably
operate just the same (but only temporarily). Measure
voltage with suitable instruments, without using a
phase screwdriver. If the electrical supply is of the
230 V Phase-Phase type, to ensure the same safe
conditions as those existing in case the boiler is fed
with a Phase-Neutral supply, install an adapter kit
for Phase-Phase supplies, available on request.
Contact an Authorized Immergas Service Centre for
installation of the kit.
Key
1 - Gas valve
2 - Nitrile O-ring
3 - Brass washer
4 - Flexible brass ring
5-Nut
6 - Gas pipe
Key:
G - 1/2" Gas supply”
R - 3/4" System return”
M - 3/4" System delivery”
S - Recycle 1/2" (optional)
U - 1/2" Domestic hot
water outlet”
E - 1/2" Domestic water
inlet”
V - 230V-50Hz Electrical
connection
THE kit comprises:
N ° 2 - 3/4" telescopic fittings
(R-M)
N ° 1 - 1/2" telescopic fitting
(U)
N ° 1 - 1/2" gas fitting (G)
N ° 1 - 1/2" ball valve
1/2" (E)
N ° 3 - Ø18 copper bend
N ° 2 - Ø14 copper bend
N ° 2 - adjustable expansion
plugs
N ° 2 - boiler support hooks
Seals and O-Rings