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2.4 Multiple Fans on a Brick Chimney
If two or more fans are required to create sufficient draft, a
special adapter plate is required. The adapter should be
made of stainless steel (14 GA or thicker), depending on the
size and the fan models used.
The two holes in the plate should match the throat diameter
of the fan model used and the distance from center to center
should be at least equal to the fan width (dimension “B” in
1.5. Dimensional Data).
The adapter should be sealed with silicone and bolted onto
the top.
2.5 Wall Mounting of Chimney Fan
When mounting the chimney fan on a wall, the installation
instructions for installation on a steel chimney should be
followed. Use of the adapter FRS is not necessary.
To ease installation, detach the fan base by removing the
bolts holding the hinges together. Center fan base over outlet
and bolt the base onto the wall with the hinges pointing
upwards.
After mounting the base securely, attach the fan motor
housing by assembling the fan hinges again. Seal with
silicone all around the fiber mat to prevent rain from entering
the flue.
2.6 Installation for high temperatures
If the fan is used for applications where the flue gas
temperatures exceed 400°F
at the flue exit
, and does not
exceed 650°F, dilution bolts must be used.
Dilution bolts will cause cool air to dilute the warm flue gas,
by lifting the fan and leaving space so the cool air can get
in under the fan base.
The dilution bolts should be installed in the outer holes in
the fan base.
The dilution bolts are adjustable and should be adjusted so
the flue gas temperature does not exceed 400°F when
discharged through the fan.
When using dilution bolts the fan’s actual capacity is reduced
and a stronger model may be required.
The fiber mat is not required when using dilution bolts.
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