Immergas EOLO Maior 24 kW Manual De Instrucciones página 107

• Temperature loss in insulated ducting. To avoid problems of fume con-
densation in the exhaust pipe Ø 80, due to cooling through the walls, the
length of the exhaust duct must be limited to 12 metres. The figure above
shows a typical case of insulation, the short intake duct and the much
longer exhaust duct (over 5 m). The entire intake pipe is insulated to
prevent the humid air in the boiler room from condensing in contact with
the pipe cooled by the air coming from the outside. The entire exhaust
pipe is insulated, with the exception of the elbow leaving the splitter,
to reduce heat dispersion from the duct and thus prevent formation of
fume condensate.
N.B.: When installing the insulated ducts, a section clamp with pin must
be installed every 2 metres.
Internal installation in B configuration. The appliance can be installed
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inside buildings in B configuration; in this case, make sure to respect all
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the technical standards and current national and local regulations.
Fume exhaust to flue/chimney.
The fume exhaust does not have to be connected to a conventional type branched
flue. The fume exhaust can be connected to a special LAS type multiple
flue. The flues must be specially designed according to the calculation
method and requirements of the standards, by professionally qualified
technical personnel.
Chimney or flue sections for connection of the exhaust pipe must comply
with requirements of the standards.
Existing flue ducting.
With a specific "ducting system" it is possible to reuse existing flues, chimneys
and technical openings to exhaust the boiler fumes. Ducting requires the use
of conduits declared suitable for the purpose by the manufacturer, following
the installation and operation instructions provided by the manufacturer
and the requirements of the standard.
Flues, chimneys and chimney-tops.
Flues, chimneys and chimney-tops for exhausting fumes must meet the
requisites of the standard and all the applicable regulations.
Positioning of draught terminals. Draught terminals must:
- be installed on external walls of the building;
- be positioned so that the distances respect the minimum values specified
in current technical standards.
Fume exhaust of forced-draught appliances in closed open-top spaces. 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 heating power from 4 to 35 kW, provided the conditions as per the
current technical standards are respected.
System filling.
After the boiler is connected, fill the system by means of the filler cock
(see fig. page 107).
Filling must be done slowly in order to release the air bubbles in the water
via the boiler and heating system vents.
The boiler has a built-in automatic venting valve on the circulating pump.
Ensure that the cap is loose. Open the radiator relief valves.
Close the radiator relief valves only when 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
means of the main switch on the control panel. Vent the circulating pump
by unscrewing the front cap and keeping the motor running.
Tighten the cap on completion.
Gas system start-up.
To start up the system:
- open windows and doors;
- avoid the presence of sparks or naked flames;
- vent air from pipes;
- check gas supply tightness with the boiler gas On/Off cock closed, check-
ing that no gas flow is indicated on the meter for at least 10 minutes.
Boiler start-up (lighting).
For issue of the Declaration of Conformity required by Italian Law, the
following must be done for boiler start-up:
- check the gas supply circuit tightness with on/off valves closed and
subsequently open with gas valve closed; no gas flow must be indicated
on the meter for 10 minutes;
- check that the type of gas used is that for which the boiler is arranged;
- switch on the boiler and check correct ignition;
- make sure the gas flowrate and relevant pressure values correspond to
those given in the manual (see pages 118-119);
- check intervention of the safety device in the event of no gas, and relevant
activation time;
- check activation of the main switch ahead of the boiler and on the
unit;
- check that the concentric intake/exhaust terminal (if fitted) is not
blocked.
The boiler must not be started up in the event of negative result of any of
these checks.
N.B.: The initial boiler check must be carried out by a qualified technician.
The boiler warranty is valid as of the date of the check.
The test and warranty certificate is issued to the user.
Circulating pump.
Eolo Maior kW boilers are supplied with a built-in circulating pump with
3-position electric speed control. The boiler does not operate correctly with
the circulating pump on first speed. For optimal boiler operation, with new
systems (single pipe and modul) use the circulating pump at maximum
speed. The circulating pump is already fitted with a capacitor.
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