Bard Bayrd Furnace 403293A - Manual (Page 18)

TERMINATION MORE THAN 10 FEET FROM RIDGE
FIGURE 18
TERMINATION 10 FEET OR LESS FROM RIDGE
FIGURE 19
WAftNINGt Failure to properly terminate
vent chimney systems could allow combus­
tion products to collect In structure, result­
ing In Injury or death.
c. Terminate venting system at least three feet
above any forced-air building inlet within ten feet.
Consider doors, windows and gravity air building
inlets. Locate vent termination at least four feet
below, four horizontal feet from or one foot above
any of these openings.
D. Installation.
1. Vent connectors.
Attach vent connector at draft inducer collar. Make
sure flue gasket is in place providing a seat. Use a
minimum of three equally spaced screws around
connection. Connect all other vent pipes using three
equally spaced screws at each joint. Exception is
only when you use Type B1 vent pipe with self­
locking connections or high temperature plastic pipe.
WARNINGS Unsecured vent pips connections
may loosen. This can allow combustion products
to collact In structura, resulting In Injury or death.
Install vent connectors without any dips or sags.
Slope them upward from furnace at least f/4” per
foot. To prevent sagging, at each joint support vent
connectors and horizontal portions using hinges,
straps or equivalent. Seal all connections where vent
connectors enter chimney. See Figure 15.
To avoid blockage, attach vent connector to a ma­
sonry chimney above the extreme bottom. For in­
spection ease, use thimble or slip joint to make vent
connector removal easy. Firmly attach connector.
Insert all vent connectors into, but not beyond, inside
chimney wall.
2. Vertical vent or chimney systems.
Install vent materials following their listing terms,
manufacturer's instructions, these instructions and
local codes.
A gas vent passing through a roof must extend
through roof flashing, jack or thimble. It must termi­
nate above roof surface.
E. Existing vent considerations.
Masonry chimneys previously used for venting solid fuel
or oil burning equipment should be lined with suitable
metal liner. Also provide an accessible clean out per cur­
rent National Fuel Gas Code ANSI Z223.1/NFPA 54.1.
1. Inspection of vents (chimneys).
a. Make sure existing vent or chimney is proper
size and construction for appliances that will use
it. The best way to do this is to size as if it were
a new installation. Compare the existing vent to
your calculations and make necessary correc­
tions.
b. Examine vent or chimney cleanouts to make sure
they remain tightly closed when not in use. Make
sure vent or chimney passageway is clear and
free of obstructions. Look for evidence of con­
densate or deterioration in vent or chimney. Ei­
ther of these means an inadequate vent.
c. If you find an inadequate vent or chimney, do
not leave it as is. Repair or replace it. A new
vent must meet these instructions and current
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