IBC SL 10-85 G3, Installation & Operating Manual

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Air intake installation
An “Indoor Combustion Air installation” can be described as air
for combustion that is taken from the air surrounding the boiler.
Flue gas exhaust to outdoors
Combustion air from boiler room. For indoor air
installation, check air intake and boiler room
combustion air opening(s) to ensure they are clear of
obstructions.
Figure 14 Indoor combustion air intake
Warning
When using indoor air options, supply adequate
combustion air to the boiler room according to the
requirements of all applicable codes.
At a new construction site, or during renovations, action must be taken to protect the boiler from
drywall dust or other construction related contaminants; combustion air should be drawn from a
clean source (e.g. outdoors) and the boiler should be isolated from interior dust sources. Do not
seal boiler case openings directly when firing (See list of known contaminants on the Important
safety instructions on page 3 ).
Warnings
In addition to preventing ingestion of chemical contaminants, ensure air intake
terminals are not installed in locations where contamination might occur due to
ingestion of particulate foreign material (dust, dirt and debris).
Configure intake air openings, so that rain or other forms of moisture cannot
enter the air intake piping system. Otherwise serious damage to the boiler may
result.
Notes
When installing air intake piping, ensure that a "trap" is not formed in the piping
causing a build-up of water and blockage of intake air. Such blockages will
cause a boiler safety shut-down.
Filters require checking and cleaning or replacing on a regular schedule based
on the severity of the problem.
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3.7.4 Direct vent