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COMPACT 24 BOILER
Chapter
4
USE AND MAINTENANCE MANUAL
page
16
Installation
Technical dept. - All rights reserved - Reproduction prohibited
We recommend the sole use of outlet ducts which are suitable for the
type of fuel used. The supplier will not be held in any contractual and
non-contractual way liable for damage caused by installation and
usage errors and in any case due to failure to observe the instructions
provided by the manufacturer of the appliance.
The products of combustion of the boiler cannot be discharged in
collective flue ducts.
The correct installation of the flue duct is necessary to encourage the
normal flow of smoke from the combustion chamber to the outside in
the event of an electrical power failure.
Remember that a draught of 10 Pa must be guaranteed.
Below are the main characteristic traits of the flue duct according to the provisions of standards
UNI 7129 and UNI 10683:
The smoke outlet must be equipped with inspection valves;
The minimum height of the pipe directly connected to the smoke outlet of the boiler must be between 2-
3 m;
If the presence of a horizontal section is necessary, we recommend that the same is of a maximum
length of 1.5 m and with a slope gradient of 3-5% to encourage the smoke to flow away;
Use of a wind-proof and rain-proof terminal
to avoid changing the slight overpressure inside the
flue pipe (we recommend you end the flue pipe with a horizontal section);
The outlet ducting must be made with suitable materials which can withstand the products of combustion
and any condensation of the same (the inspection valve can allow any condensation that has formed to
be vented);
The ducts must be built to ensure maximum seal against smoke (UNI 10683);
We recommend you insulate the duct, especially on the outside part exposed to the weather.
Avoid installing completely horizontal sections.
The room where the heat generator is to be installed must not contain any existing or envisaged
smoke suction hoods in order to avoid depressurising the setting.
The air intakes must not be closed.
Make sure the flue pipe is kept clean, cleaning it at least once a year.
In the event of a fire in the flue pipe or duct, switch the boiler off
immediately and disconnect it from the domestic electricity mains
4.4.1.
Roof outlet along an external steel flue pipe
One of the installation solutions which could be used is to position the boiler near a perimeter wall of the home
(see figure below) so that the smoke is discharged along an external flue pipe. Here are some of the provisions
of standard UNI 7129 for this particular system configuration:
- Always make sure there is an inspection valve to allow periodic and efficient cleaning, as well as the venting of
any condensation that may have formed;
- The chimney must under all circumstances be wind-proof and rain-proof;
- Make sure the smoke outlet duct is suitably insulated in the section that crosses the wall.
