1-6
1-5
5 - IE
INSTALLATORUSERTECHNICIAN
gas supply (methane or LPG) pressure must also
be checked according to the type used in the
boiler, as insucient levels can reduce generator
output and cause malfunctions.
Ensure correct gas cock connection. e gas
supply pipe must be suitably dimensioned accor-
ding to current regulations in order to guarantee
correct gas ow to the boiler even in conditions
of maximum generator output and to guarantee
appliance eciency (technical specications).
e coupling system must conform to standards.
Combustible gas quality. e appliance has been
designed to operate with gas free of impurities;
otherwise it is advisable to t special lters up-
stream 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. is
can cause a variation in the heating power of
the mixture delivered to the appliance, with
subsequent change in its performance.
Hydraulic attachment.
Important: In order not to void the warranty
before making the boiler connections, carefully
clean the heating system on the primary heat
exchanger (pipes, radiators, etc.) with special
pickling or de-scaling products to remove any
deposits that could compromise correct boiler
operation.
In compliance with Standards in force it is man-
datory to treat the water in the heating system
chemically in order to protect the system and
appliance from deposits of lime scale.
Water connections must be made in a rational
way using the couplings on the boiler template.
e boiler safety valves outlet must be connected
to a draining funnel. Otherwise, the manufactu-
rer declines any responsibility in case of ooding
if the drain valves cut in.
Important: to preserve the duration of appliance
eciency features, in the presence of water whose
features can lead to the deposit of lime scale,
installation of the “polyphosphate dispenser” kit
is recommended. On the basis of the Standards in
force, it is mandatory to treat the water with over
25 French degrees in the heating circuit and over
15 French degrees for DHW using conditioning
chemicals for powers < 100 kW or with soeners
for powers > 100 kW.
Electrical connection: e “Eolo Star 24 3 E”
boiler has an IPX5D protection rating for the
entire appliance. Electrical safety of the unit is
reached when it is correctly connected to an
ecient earthing system as specied 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
ecient earth system or failure to comply with
the reference standards.
Also ensure that the electrical installation
corresponds to maximum absorbed power
specications as shown on the boiler data-plate.
e boilers are supplied complete with an “X”
type power cable without plug. e power sup-
ply cable must be connected to a 230V ±10% /
50Hz mains supply respecting L-N polarity and
earth connection
, is network must also
have a multi-pole circuit breaker with class III
over-voltage category. When replacing the power
supply cable, contact a qualied technician (e.g.
the Immergas Aer-Sales Technical Assistance
Service). e power cable must be laid as shown.
In the event of mains fuse replacement on the
control board, use a 3.15A quick-blow fuse. For
the main power supply to the appliance, never
use adapters, multiple sockets or extension leads.
1.6 REMOTE CONTROLS AND
ROOM CHRONOTHERMOSTATS
OPTIONAL.
La caldaia è predisposta per l’applicazione dei
cronotermostati ambiente o dei comandi remoti
che sono disponibili come kit optional.
All Immergas chronothermostats are connec-
ted with 2 wires only. Carefully read the user
and assembly instructions contained in the
accessory kit.
• On/O digital chronothermostat (Fig. 1-5). e
chronothermostat allows:
- setarea a două valori de temperatură ambient:
set two room temperature values: one for day
(comfort temperature) and one for night
(lower temperature);
- set up to four on/o dierential weekly pro-
grams;
- select the desired function mode from the
various possible alternatives:
• permanent functioning in comfort temp.
• permanent functioning in reduced temp.
• permanent functioning in adjustable anti-
freeze temp.
e chronothermostat is powered by two 1.5V
LR 6 type alkaline batteries;
• Digital Remote Control Device with climate
chronothermostat function (Fig. 1.6). In addi-
tion to the functions described in the previous
point, the Digital Remote Control panel enables
the user to control all the important informa-
tion regarding operation of the appliance and
the heating system with the opportunity of
easily intervening on the previously set para-
meters without having to go to the place where
the appliance is installed. e Digital Remote
Control panel is provided with self-diagnosis to
display any boiler functioning anomalies. e
climate chronothermostat incorporated into
the remote panel enables the system delivery
temperature to be adjusted to the actual needs
of the room being heated, in order to obtain
the desired room temperature with extreme
precision and therefore with evident saving in
running costs. e chronothermostat is fed
directly by the boiler by means of the same 2
wires used for the transmission of data between
boiler and chronothermostat.
Digital Remote Control or On/O chronother-
mostat electrical connections (Optional). e
operations described below must be performed af-
ter having removed the voltage from the appliance.
Any thermostat or On/O environment chro-
nothermostat must be connected to clamps 40
and 41 eliminating jumper X40 (Fig. 3-2). Make
sure that the On/O thermostat contact is of the
“clean” type, i.e. independent of the mains supply;
otherwise the electronic adjustment card would
be damaged. e Digital Remote Control must be
connected to clamps 40 e 41 eliminating jumper
X40 on the P.C.B. (in the boiler), (Fig. 3-2).
Important: If the Digital Remote Control is used,
arrange two separate lines in compliance with
current regulations regarding electrical systems.
No boiler pipes must ever be used to earth the
electric system or telephone lines. Ensure eli-
mination of this risk before making the boiler
electrical connections.
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