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1.20 Flues, chimneys and chimney caps.
The flues, chimneys and chimney caps for the evacuation of
combustion products must be in compliance with applicable
standards. Chimneys and roof-installed exhaust terminals must
comply with the outlet height and with the distance from technical
volumes set forth by the technical standards in force.
Positioning the wall exhaust terminals. The exhaust terminals
must:
- be installed on external perimeter walls of the building (fig. 30);
- be positioned according to the minimum distances specified in
current technical standards.
Combustion products exhaust of natural or fan assisted
appliances in open-top closed environments. In spaces closed
on all sides with open tops (ventilation pits, courtyards etc.),
direct flue gas exhaust is allowed for natural or forced draught gas
appliances with a heating power range from 4 to 35 kW, provided
the conditions as per the current technical standards are respected.
1.21 System filling.
Once the boiler is connected, proceed with system filling via the
filling valve (Fig. 34).
Filling is performed at low speed to ensure release of air bubbles
in the water via the boiler and heating system vents.
The boiler has a built-in automatic venting valve on the circulator.
Check if the cap is loose.
Open the radiator vent valves. Close radiator vent valves when
only water escapes from them.
Close the filling valve when the boiler manometer indicates
approx. 1.2 bar.
N.B.: during these operations turn on the circulation pump at
intervals, by means of the stand-by/summer winter button (2)
positioned on the control panel. Vent the circulation pump by
loosening the front cap and keeping the motor running.
Tighten the cap after the operation.
1.22 Gas system start-up.
To start up the system, refer to the standard in force.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or naked flames;
- bleed all air from pipelines;
- check that the internal system is properly sealed according to
specifications.
1.23 Boiler start up (ignition).
For issue of the Declaration of Conformity provided for by Italian
Law, the following must be performed for boiler start-up:
- check that the internal system is properly sealed according to
specifications;
- ensure that the type of gas used corresponds to boiler settings;
- switch the boiler on and ensure correct ignition;
- make sure that the gas flow rate and relevant pressure values
comply with those given in the manual (Par. 4.1 / 4.4);
- ensure that the safety device is engaged in the event of gas supply
failure and check activation time;
- check activation of the main switch located upstream from the
boiler;
- check that the concentric intake-exhaust terminal (if fitted) is
not blocked.
The boiler must not be started up even if only one of the checks
should be negative.
N.B.: the preliminary boiler check must be carried out by a qualified
technician. The standard boiler warranty is valid from the date of
inspection.
The test certificate and warranty is issued to the user.
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