506843-01
Page 13 of 39
Issue 1132
Use self drilling sheet metal screws or a mechanical fastener
to firmly secure the vent pipe to the round collar of the flue
transition. If self drilling screws are used to attach the vent
pipe, it is recommended that three be used. Drive one self
drilling screw through the front and one through each side
of the vent pipe and collar. See Figure 15.
Install the first vent connector elbow at a minimum of six
inches (152 mm) from the furnace vent outlet. See Figure
15.
Venting Using a Masonry Chimney
The following additional requirements apply when a lined
masonry chimney is used to vent this furnace.
Masonry chimneys used to vent Category I central furnaces
must be either tile lined or lined with a listed metal lining
system or dedicated gas vent. Unlined masonry chimneys
are prohibited. See Figures 16 and 17 for common venting.
A chimney with one or more sides exposed to the outside of
the structure is considered to be an exterior chimney.
An exterior masonry chimney that is not tile lined must be
lined with B 1 vent or a listed insulated flexible metal vent.
An exterior tile lined chimney that is sealed and capped may
be lined with a listed uninsulated flexible metal vent.
If the existing chimney will not accommodate a listed metal
liner, either the chimney must be rebuilt to accommodate
one of these liners or an alternate approved venting method
must be found.
Insulation for the flexible vent pipe must be an encapsulated
fiberglass sleeve recommended by the flexible vent pipe
manufacturer.
Asphyxiation hazard. The exhaust vent for this furnace
must be securely connected to the furnace flue transitiion
at all times.
WARNING
Figure 16
Common Venting Using Metal Lined
Masonry Chimney
NOTE 1:
Refer to the provided venting tables for installations.
Refer to the capacity requirements shown in the provided venting
tables.
Figure 15
Vent Connection
