Immergas NIKE MYTHOS 24 2E Series, Instructions And Warnings

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16
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
1.12 DUCTING OF FLUES OR
TECHNICAL SLOTS.
Ducting is an operation through which by in-
serting one or more relevant pipes, one achieves
a system for the evacuation of the combustion
products of a gas appliance, consisting in the
combination of an existing or new ducting pipe
with a chimney, flue or technical slot (also in new
buildings). Ducting requires ducts declared to
be suitable for the purpose by the manufacturer,
following the installation and user instructions,
provided by the manufacturer and the require-
ments of the standards in force.
1.13 CONFIGURATION TYPE B
22
,
OPEN CHAMBER AND FORCED
DRAUGHT FOR INDOORS.
The appliance can be installed inside buildings in
B
22
mode; in this eventuality, all technical rules
and national and local regulations in force, must
be complied with.
- type B open chamber boilers must not be
installed in places where commercial, artisan
or industrial activities take place, which use
products that may develop volatile vapours
or substances (e.g. acid vapours, glues, paints,
solvents, combustibles, etc.), as well as dusts
(e.g. dust deriving from the working of wood,
coal fines, cement, etc.), which may be harm-
ful for the components of the appliance and
jeopardise operation.
- in type B
22
configuration, the boilers must not
be installed in bedrooms, bathrooms or in
studio flats.
- The installation of appliances in B
22
configura-
tion is only recommended outdoors (in a par-
tially protected place) or in places that are not
lived in and which are permanently ventilated.
To install them one must use the coverage kit
whose installation is referred to in paragraph 1.9.
1.14 FLUE EXHAUST TO FLUE/CHIMNEY.
Flue exhaust does not necessarily have to be
connected to a branched type traditional flue.
The flue exhaust, for boiler clots installed in C
configuration, can be connected to a special LAS
type multiple flue. For B
22
configurations, exhaust
is only allowed into individual chimney or di-
rectly into the external atmosphere via a relevant
terminal. Multiple and combined flues must be
specially designed according to the calculation
method and requirements of the standards in
force, by professionally qualified technical staff.
Chimney or flue sections for connection of the
flue exhaust pipe must comply with requisites of
technical standards in force.
1.15 FLUES, CHIMNEYS, CHIMNEY POTS
AND TERMINALS.
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 com-
ply with the outlet height and with the distance
from technical volumes 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.
1.16 SYSTEM FILLING.
Once the boiler is connected, proceed with sys-
tem filling via the filling valve (Fig. 2-2).
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 circula-
tion pump at intervals, by means of the stand-by
button located on the control panel. Vent the
circulation pump by loosening the front cap and
keeping the motor running.
Tighten the cap after the operation.
1.17 GAS SYSTEM START-UP.
To start up the system, make reference to the
Standard:
- 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 specifications.
1.18 BOILER START-UP (IGNITION).
To commission the boiler (the operations listed
below must only be performed by qualified per-
sonnel and in the presence of staff only):
- check that the internal system is properly sealed
according to the 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. 3.16);
- ensure that the safety device intervenes in the
event of gas supply failure and check the relative
intervention time;
- check activation of the main switch located
upstream of 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.