Combustion air from outdoors
Flue gas exhaust to outdoors
Boiler supply connection at rear of boiler
Boiler return connection at rear of boiler
Figure 23 Rear view - combustion air intake
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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