Specifications

6
MyBacharach.com • Fyrite
®
InSIght • Instruction 24-9460
Performing Tests
Boilers, which have a ‘bell’ shaped draft diverter directly on top,
should be tested directly below the diverter through a hole-drilled
in the vent connector.
Should draft tests below the diverter measure insufficient draft
levels, an additional test should be performed above the diverter to
determine if the reason for insufficient draft is related to a chimney
problem or a draft hood problem.
It is also a good idea to test any areas with openings that provide a
path for combustion air to be introduced to the flame. These areas
provide a path where flue gases can potentially be exhausted.
With forced air systems this area is generally limited to
immediately in front of the burners while many styles of
boilers allow secondary combustion air to also be drawn
in from all around the base of the cabinet.
Gas and oil fired power burners should be tested up
stream from the barometric, as close to the breech area
as possible.
While stack draft may be an important measurement,
fuel oil and gas fired power burners require draft control
over the fire to maintain a proper and controlled intake
of combustion air.