Connecting The Flue; Check Openings For Combustion Air Supply; And Venting - Buderus Logano G234X Installation And Maintenance Instructions Manual

5.7

Connecting the flue

5.7.1

Check 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
Ventilation, and the local building codes. In Canada the
regulations in accordance with CAN/CSA B 149.1 and 2
Installation Codes apply.
NOTICE: Risk of boiler damage and
malfunctions due to missing or inadequate
openings for combustion air and venting of
the boiler room!
Inadequate venting of the boiler room may
result in excessive ambient temperatures.
This can damage the boiler.
Inadequate combustion air supply may cause
malfunctions in operation.
B Make sure that air inlet or outlet vents are
not closed off or their size reduced and
that they are adequately dimensioned.
B The boiler must not be operated until the
obstruction has been removed.
B Draw the operator's attention to any
deficiencies and the potential dangers.
NOTICE: Risk of boiler damage from
contaminated combustion air!
B Never use cleaning agents containing
chlorine and never use halogenated
hydrocarbons (as, for example, contained
in spray cans, solvents, cleaning agents,
paints and adhesives).
B Do not store or use these substances in
the boiler room.
B Avoid excessive dust accumulation.
If impurities in the combustion air are
possible (e.g. installation near swimming
pools, dry cleaners or hairdressing salons),
sealed combustion is recommended.
Logano G234X - Technical specifications are subject to change without prior notice.
Installing the boiler
Total air supply from inside 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
appliances 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 (2200 mm
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 (0.06 m
One of the vents must be no more than 12 inches
(300 mm) from the ceiling and the other no more than
12 inches (300 mm) from the floor of the boiler room,
measured from the outer edge of the vent aperture.
The smallest dimension of all air intake and outlet
openings must be not less than 3 inches (80 mm).
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 inches
(300 mm) from the ceiling and the other not more than
12 inches (300 mm) 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 unobstructed
connection to the open air (crawl passage or roof space).
The smallest dimension of all air intake and outlet
openings must be not less than 3 inches (80 mm).
• If there is a direct connection to the outside, each
opening must have a minimum cross-section of one
2
square inch (25 mm ) per 4000 Btu/h (550 mm
of the total combustion output of all gas-fired
appliances inside the closed room.
• If there is a connection to the outside through a
ventilated attic with vertical ventilation ducts, each vent
aperture must have a minimum cross-section of one
square inch per 4000 Btu/h (550 mm
burner output of all gas-fired appliances inside the
closed room.
• If there is a connection to the outside through a
ventilated attic with vertical ventilation ducts, each vent
aperture must have a minimum cross-section of one
square inch per 2000 Btu/h (1100 mm
total burner output of all gas-fired appliances inside the
closed room.
• If the openings are connected to ventilation ducts, the
ducts must have the same cross-section area as the
openings.
5
2
/kw) of the
2
).
2
/kW)
2
/kW) of the total
2
/kW) of the
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