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1.5 GAS ATTACHMENT.
Our boilers are designed to operate with methane
gas (G20) and LPG. Supply pipes must be the
same as or larger than the 1/2”G boiler fitting.
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-plate). If different, the appliance must be
converted for operation with the other type
of gas (see converting appliance for other gas
types). It is also important to check the dynamic
pressure of the mains (methane or LPG) used
to supply the boiler, which must comply with
the technical standards in force, as insufficient
levels may reduce generator output and cause
discomfort to the user. Ensure correct gas cock
connection. The gas supply pipe must be suitably
dimensioned according to current regulations
in order to guarantee correct gas flow to the
boiler even in conditions of max. generator
output and to guarantee appliance efficiency
(technical specifications). The coupling system
must conform to technical standards in force..
Combustible gas quality.
The appliance has been
designed to operate with gas free of impurities;
otherwise it is advisable to fit special filters
upstream from the appliance to restore the
purity of the gas.
Storage tanks (in case of supply from LPG
depot).
- New LPG storage tanks may contain residual
inert gases (nitrogen) 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 heating power of
the mixture delivered to the appliance, with
subsequent change in its performance.
1.6 HYDRAULIC ATTACHMENT.
Important:
In order not to void the warranty
before making the boiler connections, carefully
clean the heating system (pipes, radiators, etc.)
with special pickling or de-scaling products to
remove any deposits that could compromise
correct boiler operation.
A treatment of the water of the heating and
water system is required, in compliance with the
technical standards in force, in order to protect
the system and the appliance from deposits (e.g.
limescale), slurry or other hazardous deposits.
Water connections must be made in a rational
way. 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.
Attention:
Immergas declines all liability in
the event of damage caused by the inclusion of
automatic filling that is not of its own brand.
In order to meet the system requirements
established by the technical regulation in force
in relation to the pollution of drinking water,
we recommend installing the IMMERGAS
anti-backflow kit to be used upstream of the
cold water inlet connection of the boiler. It is also
recommended that the heat transfer fluid (e.g.
water + glycol) entered in the primary circuit
of the boiler (heating circuit), complies with the
local regulations in force.
Important:
to preserve the life and efficiency of the
domestic hot water exchanger it is recommended
to install the “polyphosphate proportioner” kit in
the presence of water whose characteristics can
give rise to scale deposits.
1.7 ELECTRICAL CONNECTION.
The “Avio 24 2 ErP” boiler has an IPX4D
protection rating for the entire appliance.
Electrical safety of the unit is reached when it
is correctly connected to an efficient earthing
system as specified by current safety standards.
Important:
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 comply
with the reference standards.
Also ensure that the electrical installation
corresponds to maximum absorbed power
specifications as shown on the boiler data-plate
leads.
Boilers are supplied complete with an “X” type
power cable without plug.
The power supply cable must be connected to a
230V ±10% / 50Hz mains supply respecting L-N
polarity and earth connection; , this network
must also have a multi-pole circuit breaker with
class III over-voltage category. When replacing
the power supply cable, contact a qualified
firm (e.g. the Authorised After-Sales Technical
Assistance Service).
The power cable must be laid as shown.
In the event of mains fuse replacement on the
control card, use a 3.15A quick-blow fuse. For
the main power supply to the appliance, never
use adapters, multiple sockets or extension leads.
case of walls made from hollow brick or block,
partitions with limited static properties, or in any
case walls other than those indicated, a static test
must be carried out to ensure adequate support.
N.B.: the hex head screws supplied in the blister
pack are to be used exclusively to fix the relative
mounting bracket to the wall.
T
hese boilers are used to heat water to below
boiling temperature in atmospheric pressure.
They must be connected to a heating system
and hot water circuit suited to their performance
and capacity.
Anti-Legionella thermal treatment of the Im-
mergas storage tank (which can be activated
through the specific function present on the set
thermoregulation systems): during this phase,
the water temperature inside the storage tank ex-
ceeds 60 °C resulting in burns hazards. Keep this
DHW treatment under control (and inform the
users), to prevent unexpected damage to persons,
animals and objects. If required, a thermostatic
valve must be installed at the DHW outlet to
prevent burns.
1.3 ANTIFREEZE PROTECTION.
Minimum temperature -5°C. The boiler comes
standard with an anti-freeze function that ac-
tivates the pump and burner when the system
water temperature in the boiler falls below 4°C.
The antifreeze function is only guaranteed if:
- the boiler is correctly connected to gas and
electricity power supply circuits;
- the boiler is powered constantly;
- the boiler is on and not in Stand-by;
- the boiler is not in ignition failure block (Par.
2.7);
- the boiler essential components are not faulty.
In these conditions the boiler is protected against
freezing to an ambient temperature of -5°C.
N.B.
: if the boiler is installed in places where
the temperature falls below 0°C the domestic
hot water and central heating attachment pipes
must be insulated.
The water in the storage tank unit is not protected
against freezing when the boiler is switched off.
1.4 BOILER CONNECTION UNIT.
The connection unit consisting of all the nec-
essary parts to perform the hydraulic and gas
system connections of the appliance comes as
standard with the boiler.
Summary of Contents for AVIO 24 2 ERP
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