17
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TALLER
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MAINTEN
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1.19 FLUES, CHIMNEYS, CHIMNEY CAPS
AND TERMINALS.
The flues, chimneys and chimney caps for the
evacuation of combustion products must be in
compliance with standards in force. The chimney
caps and the roof exhaust terminals must respect
the outlet quotas and the distance of the foreseen
technical volumes from the current technical
regulations.
Positioning the wall exhaust terminals.
The
exhaust terminals must:
- be installed on external perimeter walls of the
building;
- 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, air shafts,
courtyards etc.), direct flue exhaust is allowed
for conventional or fan assisted draught gas
appliances with a heating power range from 4 to
35 kW, provided the conditions as per the current
technical standards are respected.
1.20 SYSTEM FILLING.
Once the boiler is connected, proceed with
system filling via the filling valve (Fig. 1-28 and
2-8). 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 air 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 start/up the
circulation pump at intervals, acting on the main
switch positioned on the control panel.
Vent the
circulation pump by loosening the front cap and
keeping the motor running.
Re-tighten the cap
after the operation.
1.21 FILLING THE CONDENSATE TRAP.
On first lighting of the boiler combustion
products may come out the condensate drain;
after a few minutes’ operation check that this no
longer occurs. This means that the trap is filled
with condensate to the correct level preventing
the passage of combustion products.
1.22 GAS SYSTEM START-UP.
To start up the system, refer to the current
regulations. 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 naked flames;
- bleed all air from pipelines;
- check that the internal system is properly sealed
according to the specifications.
1.23 BOILER START UP (IGNITION).
In order to issue the Declaration of Conformity
required by the laws in force, one must fulfil
the following requirements to commission the
boiler (the operations listed below must only
be performed by qualified personnel and in the
presence of staff only):
- check that the internal system is properly sealed
according to the specifications set forth by
technical regulations in force;
- 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. 3.18);
- 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 and in 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.:
only upon completing commissioning by an
installer, may an authorised company 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.
