Ducting Of Flues Or Technical Slots; Flue Exhaust To Flue/Chimney; Flues, Chimneys And Chimney Caps; System Filling - Immergas VICTRIX 26 2 I Instruction Booklet And Warning

1.10 DUCTING OF FLUES OR
TECHNICAL SLOTS.
Ducting is an operation through which by the
introduction of one or more relevant pipes,
a system is realised for the evacuation of the
combustion products of a gas appliance made
up from the coupling of an existing or new
ducting pipe with a chimney, flue or technical
slot (also in new buildings) (Fig. 1-23). Ducting
requires the use of ducts declared to be suitable
for the purpose by the manufacturer, following
the installation and user instructions, provided
by the manufacturer and the requirements of
the standards.
Immergas ducting system. The Ø60 rigid and
Ø80 flexible "Green Range" ducting systems must
only be used for domestic use and with Immergas
condensing boilers.
In any case, ducting operations must respect
the provisions contained in the standard and in
current technical regulations; in particular, the
declaration of conformity must be compiled at
the end of work and on commissioning of the
ducted system. The instructions in the project
or technical report must likewise be followed, in
cases provided for by the standard and current
technical regulations. The system or components
of the system have a technical life complying with
current standards, provided that:
- it is used in average atmospheric and
environmental conditions, according to
current regulations and in particular, by the
Standard (absence of combustion products,
dusts or gases that can alter the normal
thermophysical or chemical conditions;
existence of temperatures coming within the
standard range of daily variation, etc.).
- Installation and maintenance must be
performed according to the indications
supplied by the manufacturer and in
compliance with the provisions in force.
C83
- The max. possible length of the Ø 60 flexible
ducting vertical section is equal to 22 m. This
length is obtained considering the complete
Ø 80 exhaust terminal, 1m of Ø 80 pipe in
exhaust, two 90° Ø 80 bends at boiler outlet.
- The max. possible length of the Ø 80 flexible
ducting vertical section is equal to 30 m. This
length is obtained considering the complete
exhaust terminal, 1m of Ø 80 pipe in exhaust,
two 90° Ø 80 bends at boiler outlet for
connecting to the ducting system and two
direction changes of the flexible tube inside
the flue/technical slot.
- The max. possible length of the Ø 60 flexible
ducting vertical section is equal to 30 m. This
length is obtained considering the complete
Ø 80 exhaust terminal, 1m of Ø 80 pipe in
exhaust, two 90° Ø 80 bends at boiler outlet.

1.11 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 only installed in C
configuration, can be connected to a special
LAS type multiple flue. For B
exhaust is only allowed into individual flue
or directly into the external atmosphere via a
relevant terminal. The multiple flues and the
combined flues must also only be connected to
type C appliances of the same type (condensing),
having nominal heat inputs that do not differ by
more than 30% less with respect to the maximum
that can be attached and powered by the same
fuel. The thermo-fluid dynamic features (flue
flow rate, % of carbon dioxide, % humidity etc....)
of the appliances attached to the same multiple
flues or combined flues, must not differ by more
than 10% with respect to the average boiler
attached. Multiple and combined flues must be
specially designed according to the calculation
method and requirements of the standards, by
professionally qualified technical staff. Chimney
or flue sections for connection of the exhaust
pipe must comply with requisites of technical
standards in force.
1.12 FLUES, CHIMNEYS AND CHIMNEY
CAPS.
The flues, chimneys and chimney caps for the
evacuation of combustion products must be in
compliance with applicable standards.
Positioning the 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, 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.
1-23
12 - IE

1.13 SYSTEM FILLING.

Once the boiler is connected, proceed with
system filling via the filling valve (Fig. 1-25 and
2-2). Filling is performed at low speed and using
the automatic vent functions 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.: vent the circulation pump by loosening the
front cap and keeping the motor running. Re-
tighten the cap after the operation
1.14 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
configurations, the passage of combustion products.
23

1.15 GAS SYSTEM START-UP.

To start up the system, make reference to the
Standard: 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 specifications.