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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 components 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
5HIHUHQFH &RORU /HQJWK ,' 2'
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)