Air intake installation
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 Known contaminants on page 4).
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.
Exhaust venting installation
Exhaust venting must slope down towards the boiler with a pitch of at least ¼" per foot (PP vent:
follow PP manufacturer requirements for slope), so condensate runs back towards the trap.
Exhaust piping is inserted directly into the left connector on the top of the boiler, then runs
horizontally or vertically to the outdoors. Screen material can be placed at the outlet as appropriate
for the environment (e.g., insects, dust).
Check that material meets local codes including fire stopping requirements. Some local
jurisdictions require a minimum initial length of pipe be exposed or accessible for inspection.
Pipe clearances - no IBC requirements; follow local codes. All piping must be liquid and
pressure tight.
Ensure all venting components are clear of burrs/debris prior to assembly. Clear plastic
debris left in the combustion air piping to avoid intake into the fan.
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