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1. If a vent (common or dedicated) becomes blocked, the fur-
nace will be shut off by the draft safeguard switch located
on the vent elbow.
2. Do not connect this Category I furnace into a single--wall
dedicated or common vent. The dedicated or common
vent is considered to be the vertical portion of the vent
system that terminates outdoors.
3. Vent connectors serving Category I furnaces shall not be
connected into any portion of a mechanical draft system
operating under positive pressure.
4. Do not vent this appliance with any solid fuel burning ap-
pliance.
5. Category I furnaces must be vented vertically or nearly
vertically unless equipped with a listed power venter.
6. Do not vent this appliance into an unlined masonry chim-
ney. Refer to Chimney Inspection Chart, Fig. 27.
MASONRY CHIMNEY REQUIREMENTS
NOTE: These furnaces are CSA design--certified for use in
exterior clay tile--lined masonry chimneys with a factory
accessory Chimney Adapter Kit. Refer to the furnace rating plate
for correct kit usage. The Chimney Adapter Kits are for use with
ONLY furnaces having a Chimney Adapter Kit numbers marked
on the furnace rating plate.
If a clay tile--lined masonry chimney is being used and it is
exposed to the outdoors below the roof line, relining might be
required. Chimneys shall conform to the Standard for Chimneys,
Fireplaces, Vents, and Solid Fuel Burning Appliances
ANSI/NFPA 211--2009 and must be in good condition.
U.S.A.--Refer to NFPA 54/ANSI Z223.1--2009 Sections 13.1.8
and 13.2.20 of the NFGC or the authority having jurisdiction to
determine whether relining is required. If relining is required, use
a properly sized listed metal liner, Type--B vent, or a listed
alternative venting design.
NOTE: See the NFPA 54 / ANSI Z223.1--2009, 13.1.8 and
13.2.20 regarding alternative venting design and the Exception,
which cover installations such as the Chimney Adapter Kits
which are listed for use with these furnaces. The Chimney
Adapter Kit is listed alternative venting system for these furnaces.
See the kit instructions for complete details. See Table 17 for
accessory list.
This furnace is permitted to be vented into a clay tile--lined
masonry chimney that is exposed to the outdoors below the roof
line, provided:
1. Vent connector is Type--B double--wall, and
2. This furnace is common vented with at least 1 draft hood
equipped appliance, and
3. The combined appliance input rating is less than the max-
imum capacity given in Table 8 , and
4. The input rating of each space heating appliance is greater
than the minimum input rating given in Table 9 for the
local 99% Winter Design Temperature. Chimneys having
internal areas greater than 38 in
2
(24516 mm
2)
require fur-
nace input ratings greater than the input ratings of these
furnaces. See footnote at bottom of Table 9, and
5. The authority having jurisdiction approves.
If all of these conditions cannot be met, an alternative venting
design shall be used, such as the listed chimney adapter kit with
these furnaces, which are listed for use with the kit, a listed
chimney--lining system, or a Type--B common vent.
Inspections before the sale and at the time of installation will
determine the acceptability of the chimney or the need for repair
and/or (re)lining. Refer to the Fig. 27 to perform a chimney
inspection. If the inspection of a previously used tile--lined
chimney:
a. Shows signs of vent gas condensation, the chimney
should be relined in accordance with local codes and
the authority having jurisdiction. The chimney should
be relined with a listed metal liner, Type--B vent, or a
listed chimney adapter kit shall be used to reduce con-
densation. If a condensate drain is required by local
code, refer to the NFPA 54 / ANSI Z223.1--2009, Sec-
tion 12.10 for additional information on condensate
drains.
b. Indicates the chimney exceeds the maximum permiss-
ible size in the tables, the chimney should be rebuilt or
relined to conform to the requirements of the equip-
ment being installed and the authority having jurisdic-
tion.
A chimney without a clay tile liner, which is otherwise in good
condition, shall be rebuilt to conform to ANSI/NFPA 211 or be
lined with a UL listed metal liner or UL listed Type--B vent.
Relining with a listed metal liner or Type--B vent is considered to
be a vent--in--a--chase.
If a metal liner or Type--B vent is used to line a chimney, no other
appliance shall be vented into the annular space between the
chimney and the metal liner.
310AAV