Fondital GIAVA KRB 12, Руководство по установке, использованию и техническому обслуживанию, Страница: 40 / 68

40
3.2.5.1. Configuration of air intake and flue gas venting ducts: B23, B53, C13, C33, C43, C53, C83
The information given above is with reference to air intake/flue gas venting ducts made from smooth, rigid pipes approved and
supplied by the manufacturer.
B23 installation type
Boiler intended for connection to an existing flue system external to the boiler room. Combustion air is taken directly from the boiler room itself
while flue gas is conveyed to the outside.
The boiler is not to be fitted with anti-wind gust device; it has to be equipped with a fan mounted before the combustion chamber/heat exchanger.
B53 installation type
Boiler intended for connection, via an independent duct, to the flue gas venting terminal. Combustion air is taken directly from the boiler room
itself while flue gas is conveyed to the outside.
The boiler is not to be fitted with anti-wind gust device; it has to be equipped with a fan mounted before the combustion chamber/heat exchanger.
C13 installation type
Boiler intended for connection to horizontal outlet and intake ducts connected to the outside by means of coaxial or split ducts.
The minimum distance between the air intake duct and the flue gas venting duct must be at least 250 mm, whereas both terminals must be
contained within a square measuring 500 x 500 mm.
The boiler is to be equipped with a fan mounted before the combustion chamber/heat exchanger.
C33 installation type
Boiler intended for connection to vertical outlet and intake ducts connected to the outside by means of coaxial or split ducts.
The minimum distance between the air intake duct and the flue gas venting duct must be at least 250 mm, whereas both terminals must be
contained within a square measuring 500 x 500 mm.
The boiler is to be equipped with a fan mounted before the combustion chamber/heat exchanger.
C43 installation type
Boiler intended for connection to collective chimney pipe system that includes two ducts, air intake and flue gas exhaustion. These ducts may be
coaxial or split.
The chimney must be compliant with applicable legislation and standards.
The boiler is to be equipped with a fan mounted before the combustion chamber/heat exchanger.
C53 installation type
Boiler with separate pipes for combustion air intake and flue gas evacuation.
These flues may discharge in areas at a different pressure.
The terminals may not face each other from opposed walls.
The boiler is to be equipped with a fan mounted before the combustion chamber/heat exchanger.
C83 installation type
Boiler intended to be connected to combustion air terminal and to a single flue gas terminal or collective chimney.
The chimney must be compliant with applicable legislation and standards.
The boiler is to be equipped with a fan mounted before the combustion chamber/heat exchanger.
3.2.5.2. Ø 100/60 mm and Ø 125/80 mm air/flue gas coaxial duct system
The information given above is with reference to air intake/flue gas venting ducts made from smooth, rigid pipes approved and
supplied by the manufacturer.
C13 installation type
12 kW
Minimum permissible length of horizontal coaxial pipes is 1 meter.
Maximum permissible length of Ø100/60 mm horizontal coaxial pipes is 9 meters.
Maximum permissible length of Ø125/80 mm horizontal coaxial pipes is 30 meters.
For each additional 1 meter of straight pipe maximum permissible length is to be reduced by 1 meter.
For each additional 90° elbow, maximum permissible length is to be reduced by 1 meter.
For each additional 45° elbow, maximum permissible length is to be reduced by 0.5 meter.
The wall terminal reduces maximum permissible length by 1.5 meters.
The flow resistance of the first elbow shall not be taken into account to calculate maximum permissible length.
The air intake duct is to be tilted down by 1% toward its exit, in order to avoid rain water to enter it.