Openings For Combustion Air Supply And Venting - Buderus Logano plus GB312 Installation Manual

5

Openings for combustion air supply and venting

5 Openings for combustion air supply and venting
To ensure an adequate combustion air supply and venting
of the heating system, suitable measures must be taken in
accordance with the National Fuel Gas Code, NFPA 54
(ANSI Z223.1), Section 5.3, Air for Combustion and Ven-
tilation, or the local building code. In Canada the regula-
tions in accordance with CAN/CSA B 149.1 and 2
Installation Codes apply.
Caution: Risk of boiler damage and mal-
functions due to missing or inadequate open-
ings for combustion air and venting of the
boiler room.
The openings for combustion air supply and
venting are always required regardless of
whether the combustion air is drawn from the
room (conventional flue) or supplied directly
to the boiler through ducts (balanced flue).
Inadequate venting of the boiler room
may result in excessive ambient tem-
peratures. This can damage the boiler.
Inadequate combustion air supply may
cause malfunctions in operation.
V Make sure that air inlet or outlet vents are
not closed off or their size reduced and
that they are adequately dimensioned.
V The boiler must not be operated until the
obstruction has been removed.
V Draw the operator's attention to any defi-
ciencies and the potential dangers.
Caution: Risk of boiler damage from con-
taminated combustion air.
V Never use cleaning agents that contain
chlorine or halogenated hydrocarbons
(e.g. in spray cans, solvents and cleaning
agents, paints, glues).
V Do not store or use such substances in
the boiler room.
V Avoid excessive dust accumulation.
If impurities in the combustion air are possi-
ble (e.g. installation near swimming pools, dry
cleaners or hairdressing salons), operation
independent of room air is recommended.
Caution: Dangers posed by explosive and
easily combustible materials.
V Do not use or store easily combustible ma-
terials (paper, lace curtains, clothing, thin-
ners, paints, etc.) near the boiler.
V Maintain a clearance of 16 inches from the
boiler.
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Overall air supply within the building
Make sure that the boiler room has two permanent air
vents that are connected to one or more other rooms.
When calculating the cross-sectional areas of the vent
apertures, the total burner output of all gas-fired appli-
ances in the connected rooms must be taken into
account. Each vent must have a minimum cross-section of
one square inch per 1000 Btu/h of the total burner output
of all gas-fired appliances inside the connected rooms.
Make sure that the cross-sectional area of each vent is at
least 100 square inches. One of the vents must be no
more than 12" from the ceiling and the other no more than
12" from the floor of the boiler room, measured from the
outer edge of the vent aperture. The smallest dimension
of all inlet and outlet vents must be not less than 3".
Total air supply from outside the building
Make sure that the boiler room has two permanent air
vents, one of which must not be more than 12" from the
ceiling and the other not more than 12" from the floor of
the boiler room, measured from the outer edge of the vent
aperture. The vents must be connected either directly or
via air ducts to the outside or to rooms that have an unob-
structed connection to the open air (crawl passage or roof
space). The smallest dimension of all inlet and outlet vents
must be not less than 3".
Logano plus GB312 - Technical specifications are subject to change without prior notice