16
3.2.5 Boiler room ventilation
TN model boilers have open com-
bustion chamber and can be con-
nected to a chimney: combustion
air
comes from the room where the
boiler is installed.
TFS model boilers have sealed
combustion chamber. Combustion
air is not drawn from boiler room
therefore specific recommen-
dations need not to be applied
concerning openings and venti-
lation necessary in case of room
air depletion, or concerning boiler
room requirements.
It is mandatory to install the boiler
in an adequate room following laws
and standards, which are consi-
dered as an integral part of this
manual, applicable in the country
of installation.
3.2.6 Flue system
In terms of the flue discharge into
the atmosphere, comply with appli-
cable laws and prescriptions of the
country of installation.
Balanced flue boiler (TN models)
Connecting to the chimney
The chimney is an essential com-
ponent for correct boiler operation;
it must therefore comply with the
following requirements:
- it must be made out of water-
proof material and be resistant to
flue gas temperature and conden-
sate;
- it must have appropriate mecha-
nical characteristics and low ther-
mal conductivity;
- it must be perfectly sealed;
- it must be positioned as vertical
as possible and the roof terminal
must have a cap ensuring efficient
and constant flue gas exhaustion;
- the chimney diametre must be
as large as the boiler flue gas
outlet diametre; square or rectan-
gular section chimney must bear
an internal section 10% larger
than the section of boiler flue gas
outlet;
- the duct connecting the boiler to
the chimney must follow a vertical
direction and must be long not
less than twice its diametre before
joining the chimney.
Direct emission into the atmo-
sphere
Natural draught boilers can
discharge flue gas directly into the
atmosphere by means of a duct
going through the outside walls
of the building and ending with a
terminal.
The flue gas exhaustion system
must comply with the following
requirements:
- the horizontal part inside the bui-
lding must be as short as possible
(max length is 1,000 mm);
- no more than 2 direction changes
can be implemented;
- it can host only one single boiler
flue exhaustion duct;
- the duct going through the wall
must be protected by a sheath
duct; the part of the sheath duct
facing the inside of the building
must be closed, while the part
facing outward must be open;
- the end section, on which the
terminal is to be installed, must
protrude from the wall of the bui-
lding for a length of a least twice
the diametre of the duct;
- the terminal must be positioned
at least 1.5 metre higher than the
first duct connecting to the boiler
(see pic. 12).
IMPORTANT
The boiler is fitted with an auto-
matic reset safety device. It pre-
vents flue gas leakage to the boi-
ler room (see § 1.2.4.3).
It is absolutely forbidden to
tamper with and/or exclude the
safety device
.
If the event of frequent boiler mal-
function shut-down, check flue
gas discharge system. It could be
clogged or inappropriate for flue
gas discharge into the atmosphe-
re.
MANUFACTURER shall not be
held liable for damage resulting
in incorrect installation, use,
modification of the boilers or
non-observance of instructions
provided by the manufacturer or
applicable installation standards
for the product.
Sealed chamber boiler (TFS
models)
When positioning the boiler
exhaust terminals onto the wall,
comply with laws and standards,
which are considered as an inte-
gral part of this manual, applicable
in the country of installation.
