17
INS
TALLER
US
ER
MAINTEN
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CE TECHNI
CI
AN
1.19 FLUES, CHIMNEYS, CHIMNEY POTS
AND TERMINALS.
The flues, chimneys and chimney caps for the
evacuation of combustion products must be
in compliance with technical and applicable
standards in force. Chimneys and roof-installed
exhaust terminals must comply with the outlet
height and with the distance from technical vol-
umes set forth by the technical standards in force.
Positioning the wall flue exhaust terminals.
The
wall flue exhaust terminals must:
- be installed on external perimeter walls of the
building;
- be positioned according to the minimum dis-
tances specified in current technical standards.
Combustion products exhaust of natural
draught or fan assisted appliances in open-top
closed environments.
In spaces closed on all
sides with open tops (ventilation pits, court-
yards etc.), direct combustion product exhaust
is allowed for natural draught or fan assisted gas
appliances with a heat input range from 4 to 35
kW, provided the conditions as per the current
technical standards are respected.
1.20 SYSTEM FILLING.
Once the boiler is connected, proceed with
system filling via the filling cock (Fig. 1-30 and
1-3). 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 cock when the boiler pressure
gauge indicates approx. 1.2 bar.
N.B.:
during these operations, turn on the circu-
lating pump at intervals using the main switch on
the control panel.
Vent the circulation pump by
loosening the front cap and keeping the motor run-
ning.
Screw the cap back on after the operation.
1.21 CONDENSATE TRAP FILLING.
On first lighting of the boiler, flue gas may come
out the condensate drain; after a few minutes’
operation check that this no longer occurs. This
means that the drain trap is filled with conden-
sate to the correct level preventing the passage
of flue gas.
1.22 GAS SYSTEM START-UP.
To start up the system, refer to the technical
standard in force: This divides the systems and
therefore the start-up operations into three
categories: new systems, modified systems, re-
activated systems.
In particular, for new gas systems:
- open windows and doors;
- avoid presence of sparks or open flames;
- bleed all air from the pipelines;
- check that the internal system is properly sealed
according to the specifications set forth by
technical regulations in force.
1.23 BOILER START UP (IGNITION).
In order to issue the Declaration of Conformity
required by the laws in force, the following re-
quirements must be fulfilled to commission the
boiler (the operations listed below must only be
performed by a qualified firm and without any
unauthorised persons):
- check that the internal system is properly sealed
according to the specifications set forth by
technical regulations in force;
- make sure that the type of gas used corresponds
to boiler settings;
- Check that there are external factors that may
cause the formation of fuel pockets;
- switch the boiler on and check correct ignition;
- make sure that the gas flow rate and relevant
pressure values comply with those given in the
manual (Par. 3.18);
- ensure that the safety device intervenes in the
event of gas supply failure and check the relative
intervention time;
- check the intervention of the main switch
located upstream from the boiler and in the
boiler;
- check that the intake/exhaust concentric termi-
nal (if fitted) is not blocked.
The boiler must not be started up even if only
one of the checks should be negative.
N.B.:
only upon completing commissioning by
an installer, may an authorised firm carry out an
initial inspection of the boiler, which is required to
activate the Immergas warranty. The test certificate
and warranty is issued to the user.
