Riello GITRE Series - Combustion Gas Exhaust; Technical Specifications of Stack; Connection to the Stack

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INSTALLATION
2.9 Combustion gas exhaust
The ue pipe (1) and the connection to the stack (2) must be
made in conformity to the laws, standards and regulations ap-
plicable in the place of installation.
2
≥5°
1
3
GITRÈ
E
G
GITRÈ B/100
E
G
DESCRIPTION GITRÈ 4 GITRÈ 5 GITRÈ 6
GITRÈ 5
B/100
E 178 mm
G (ue gas ex-
haust tting)
126-139 concentric Ø
GITRÈ boilers derive their comburent air from the room in which
they are installed. Suitable air vents must therefore be provided
in compliance with applicable laws and standards.
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Do not obstruct or restrict the air vents in the room where
the boiler is installed. Adequate ventilation is essential for
correct combustion and functioning.
2.9.1 Technical specications of stack
The stack must satisfy the following requirements::
− It must be constructed from materials that are imper-
meable to ue gases and that offer lasting resistance to
mechanical stress, heat and the action of the products of
combustion and condensate
− It must be vertical, free of restrictions and contain bends
of no more than 45°
− It must be suitable for the specic operating conditions
of the boiler and must be CE marked (EN1856-1, EN1443)
− It must be of adequate dimensions to ensure draught
and venting properties suitable for the needs of the boil-
er (EN13384-1)
− It must have adequate external insulation to prevent
condensation and the cooling of ue gases
− the stack must have a dedicated condensate drain sys-
tem at the bottom.
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The diameter of the stack must never be smaller than that of
the ue pipe from the boiler.
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In conguration B23, the stack must guarantee the mini-
mum draught specied by applicable technical standards,
assuming zero pressure at the boiler's ue gas exhaust.
2.9.2 Connection to the stack
The boiler must be connected to the stack using rigid ue pipes
that are resistant to heat, condensate and mechanical stress. All
joins must be sealed and the nished ue must be insulated.
Only use materials that are suitable for this purpose, e.g. stain-
less steel.
The near-horizontal section of ue pipe must have a slope of at
least 5° towards the boiler and must also be properly insulated.
In long near-horizontal sections of ue pipe (L>1 m), install a
condensate drain system near the boiler exhaust (as shown in
the gure) to drain off any condensate forming in this section
of ue.
The diameter of the stack must always be greater than that of
the ue pipe from the boiler's exhaust tting. To change direc-
tion, use a T section with an inspection cap to permit easy access
for cleaning inside the pipe. After cleaning, always make sure
that inspection caps are replaced tightly and that their seals are
undamaged and efcient.
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Flue pipes must maintain a distance of at least 500 mm
from ammable or heat sensitive construction materials.
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Joins must be sealed with materials that are resistant to
acid condensate and to the high temperatures of the boil-
er's ue gases.
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When installing ue pipes, always bear in mind the direc-
tion of the ue gases and of possible condensate ows.
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Inadequate or badly dimensioned stacks and ues can in-
crease combustion noise, cause condensation problems
and affect combustion parameters.
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Uninsulated ues are potentially dangerous and can cause
burns.