Immergas EOLO Star Manual De Instrucciones página 274

1.5 Fume exhaust to flue/chimney.
The fume exhaust does not have to be connected to a conventional type branched
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flue. The fume exhaust can be connected to a special LAS type multiple
flue. Flues must be specially designed according to the calculation method
and requirements of the standards, by professionally qualified technical
PT personnel. Chimney or flue sections for connection of the exhaust pipe
must comply with the requirements of the standards.
1.6 Ducting of existing flues.
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With a specific "ducting system" it is possible to reuse existing flues, chimneys
and technical openings to discharge the boiler fumes. Ducting requires the
use of ducts declared to be suitable for the purpose by the manufacturer,
following the installation and user instructions, provided by the manufac-
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turer, and the requirements of the standards.
1.7 Chimneys/flues.
General notes. A chimney/flue used to exhaust fumes must:
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- be fumetight, waterproof and insulated;
- be made from incombustible material resistant to normal mechanical
stress, heat and the action of combustion products or condensation;
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- be routed vertically without any restrictions;
- be adequately insulated to avoid condensation or cooling of fumes, in
particular if installed outside the building or in rooms without heat-
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ing;
- be adequately separated, by means of a suitable air space or insulation,
from zones with combustible and/or easily flammable materials;
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- have a solid materials and possible condensate collection chamber below the
opening of the first flue at a height of at least 500mm, fitted with an airtight
metal door;
- have a round, square or rectangular internal section (in that latter two
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cases with rounded angles with a radius not less than 20 mm). Hydrauli-
cally equivalent sections are also permissible;
- have a chimney cap in compliance with the specifications given below; if
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the chimney cap is not provided for, the specific requisites of the standard
must in any case be respected;
- be without mechanical suction devices installed at the top of the duct;
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- in flues routed inside or against inhabited buildings, there must be no
risk of pressure surges.
Chimney caps. These devices are installed on single or multiple flues. These
IE devices are installed to facilitate dispersion of fumes, also in bad weather,
and prevent the depositing of foreign matter. They must:
- have a useful outlet section of not less than double that of the flue/chim-
ney;
- be suitably designed to prevent rain or snow from entering the flue/chim-
ney;
- be designed to ensure constant exhaust of fumes, even with any wind
direction or angle.
The outlet height, corresponding to the top of the flue/chimney, regardless
of possible chimney caps, must be outside the "backflow zone", in order to
avoid the creation of counterpressures that prevent the free release of fumes
into the air. Therefore always respect the minimum heights given in the
figures for the standard, according to the pitch.
Positioning of draught terminals. Draught terminals must:
- be installed on the outside walls of the building;
- be positioned according to the minimum distances specified in current
technical standards.
Fume exhaust of forced-draught appliances in closed open-top envi-
ronments. In spaces closed on all sides with open tops (ventilation pits,
courtyards etc.), direct fume exhaust is allowed for natural or forced-draught
gas appliances with a heating power from 4 to 35 kW, provided the condi-
tions as per the current technical standards are respected.
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1.8 System filling.
Once the boiler is connected, proceed with filling the system by means of
the filler cock (see figure on page 276).
Filling must be carried out slowly to ensure release of air bubbles in the
water through the boiler and heating system breathers.
The boiler is equipped with an automatic air valve located on the circulating
pump. Open the air valves on the radiators. Close the radiator air valves
when only water comes out.
Close the filler cock when the boiler pressure gauge indicates approx. 1.2
bar.
N.B.: During this operation, start the circulating pump at intervals by
operating the stand-by/summer winter button (2) on the control panel.
Vent the circulating pump by unscrewing the front cap and keeping the motor
running.
Tighten the cap on completion.
1.9 Gas system start-up.
To start up the system proceed as follows:
- open windows and doors;
- avoid the presence of sparks or naked flames;
- vent all air from pipes;
- check the tightness of the internal system, according to the indications
provided by the standard.
1.10 Boiler start-up (lighting).
For issue of the Declaration of Conformity provided for by Italian Law, the
following must be carried out for boiler start-up:
- check the tightness of the internal system, according to the indications
provided by the standard;
- make sure the type of gas used corresponds to that for which the boiler
is arranged;
- switch on the boiler and ensure correct ignition;
- make sure the gas flowrate and relative pressure values comply with those
given in the handbook (see page 283);
- check safety device intervention in the event of no gas and the relative
activation time;
- check activation of the main circuit-breaker switch upstream of the boiler
and on the unit;
- make sure the concentric intake/exhaust terminal (if fitted) is not
blocked.
The boiler must not be started up if even just one of the above checks is
negative.
N.B.: The boiler preliminary check must be carried out by a qualified techni-
cian. The boiler warranty starts from the date of testing.
The initial test certificate and warranty are issued to the user.