Chimney - BOREAL HYDROBOREAL Série Instructions D'installation, D'utilisation Et D'entretien

1) The document J requires the installer to provide adequate ventilation for combustion if room air is being used for combustion and for heat
dissipation. So the room should always be adequately ventilated unless you wish to specify additional requirements. It would be possible to specify "in
accordance with document J sections 1." In the Boreal manual if you wanted to make sure that an installer maintains sufficient ventilation for the boilers.
So particular to the Boreal boilers we think the manufacturer's recommendations should include the following:
2) If the flue is to pass straight through the wall then it must run horizontally and connect with a double skin 90* Tee on the outside. This horizontal
section must not exceed 500mm in length. Do not run the first length of flue at 45* through the wall. Alternatively, the first run may run from a 90* Tee
vertically to a maximum height of 2m before connecting to a double skin insulated flue (but within 450mm of the ceiling) or exiting the building on a 45*
through the wall after rising above the boiler to a height which will allow draught stabilisers and inspection hatches to be mounted. Any bends should
have an analyser port so that an installer can put a gas analyser probe to check flue gases.
3) Distance to non combustible materials.
The diagram below illustrates that distances to non combustible materials can be reduced to a minimum of 150mm. However, the practical access
required to service and maintain the boilers is not respected in that case so minimum access distances for service to rear and side should be specified by
Boreal for the practical maintenance of the boilers.
Location of hearth or appliance
Where the hearth abuts a wall and the appliance is not more than 50
mm from the wall
Where the hearth abuts a wall and the appliance is more than 50 mm
but not more than 300 mm from the wall
Where the hearth does not abut a wall and is no more than 150 mm
from the wall (See Note 1)
Note: 1. There is no requirement for protection of the wall where X is more than 150 mm.
Will access from a single side be sufficient for most boilers? Indeed which side, this may vary from models to model.
6.2.

CHIMNEY

The chimney is essential for the proper operation of the boiler and it must fulfil with the following requirements or meeting local national requirements
• The smoke duct must be free of blockages. Mounting predominantly in the vertical plane. Avoid bends and deviations in relation to the vertical
axis greater than 45% .
• At least, 5 meters of chimney will be installed to guarantee a good draw, trying to use double-wall pipes to optimise the hot smoke duct from the
boiler and avoid any condensation inside. In the external exits it is recommended to exceed the ridges or the highest point of the roof in half a
meter at least.
• The interior section must be perfectly circular: rectangular or cross-sections must have rounded corners with a radius of not less than 20 mm.
• The interior section must be constant, free and independent.
• In order to avoid smoke flow returns or turbulences that may cause a blockage or reduce the correct smoke outlet, the connections will be made
by qualified staff, by following the steps on the safety rules point.
• The average draft of the chimney for the nominal power is ±12Pa when using wood pellets.
• To join the smoke ducts it is necessary to use non-flammable materials, resistant to the combustion products and their possible condensations.
• It is forbidden to use fibre cement or metallic flexible pipes to connect the boiler to the chimney.
• It is important to install the necessary elements between the smoke duct and the boiler smoke outlet duct in order to avoid the support of the duct
on the boiler.
• Smoke ducts must not pass through the rooms where it is forbidden the installation of combustion equipments.
INSTALLATION, OPERATING AND SERVICING INSTRUCTIONS
Solid, non-combustible material
Thickness (T)
A least 30 mm above the appliance and 1.2 m above
200 mm
the hearth
A least 300 mm above the appliance and 1.2 above
75 mm
the hearth
75 mm A least 1.2 m above the hearth
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Height (H)
HYDROBOREAL
EN