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Connection of the coaxial flue/combustion air piping
system is in the back of the unit to the separator
tube assembly. The combustion products are ven-
ted from the boiler and condenser through the cen-
ter of the coaxial tube, while the combustion air is
supplied through the outside ring of the coaxial tube.
Since Model FCX is a condensing boiler , flue pro-
ducts exiting the unit are relatively low temperature,
from 140 - 185 deg. F (60 - 85 deg C), and saturated
with humidity. Consequently, an airtight, corrosion
resistant flue system must be provided.
Various standard option flue piping component s and
packages with which to create the flue system are
available.
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Useful length under sleeve tile - 16.9 inches
(0.43 m)
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- joint fitting -
Useful length after assy. - 17.7 inches (0.45 m ) or
37.4 inches (0.95 m)
5HIHUHQFH /HQJWK
N40.28399 38.6 inches
(980 mm)
5HIHUHQFH V72.28414
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N40.28393 Tile 42.5 inches
(1080mm) 3.15 inch
(80mm) 4.92 inch
(125mm)
N40.28394 Black 42.5 inches
(1080mm) 3.15 inch
(80mm) 4.92 inch
(125mm)
5HIHUHQFH /HQJWK ,' 2'
N40.28397 19.7 inches
(500 mm) 3.15 inch
(80mm) 4.92 inch
(125mm)
N40.28398 39.4 inches
(1000 mm) 3.15 inch
(80mm) 4.92 inch
(125mm)