Appliance Application Requirements - Carrier 58CTA Installation And Service Instructions Manual

Canada (and U.S.A.)-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 maximum
capacity given in Table A, and
4. The input rating of each space heating appliance is greater
than the minimum input rating given in Table B for the local
99% Winter Design Temperature. Chimneys having internal
areas greater than 38 square inches require furnace input
ratings greater than the input ratings of these furnaces. See
footnote at bottom of Table B, 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 a
furnace 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 Fig. 33 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 condensation. If a condensate
drain is required by local code, refer to the NFGC, Section
10.9 for additional information on condensate drains.
b. Indicates the chimney exceeds the maximum permissible
size in the tables, the chimney should be rebuilt or relined
to conform to the requirements of the equipment being
installed and the authority having jurisdiction.
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 (ULC listed in Canada) 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.
→ Exterior Masonry Chimney FAN + NAT
Installations with Type-B Double-Wall Vent
Connectors
Table A—Combined Appliance Maximum Input
Rating in Thousands of BTU per Hour
INTERNAL AREA OF CHIMNEY
VENT HEIGHT (FT)
12
6 74
8 80
10 84
15 NR
20 NR
30 NR
©NFPA & AGA
(SQ. IN.)
19 28 38
119 178 257
130 193 279
138 207 299
152 233 334
NR 250 368
NR NR 404
→ Table B—Minimum Allowable Input Rating of
Space-Heating Appliance in
Thousands of BTU per Hour
VENT
HEIGHT (FT)
Local 99% Winter Design
Temperature: 17 to 26 degrees F*
6
8
10
15
20
30
Local 99% Winter Design
Temperature: 5 to 16 degrees F*
6
8
10
15
20
30
Local 99% Winter Design
Temperature: -10 to 4 degrees F*
6
8
10
15
20
30
Local 99% Winter Design
Temperature: -11 degrees F or lower*
*The 99% Winter Design Dry-Bulb (db) temperatures are found in the 1993
ASHRAE Fundamentals Handbook, Chapter 24, Table 1 (United States) and
2 (Canada), or use the 99.6% heating db temperatures found in the 1997 or
2001 ASHRAE Fundamentals Handbook, Climatic Design Information chap-
ter, Table 1A (United States) and 2A (Canada).

APPLIANCE APPLICATION REQUIREMENTS

Appliance operation has a significant impact on the performance
of the venting system. If the appliances are sized, installed,
adjusted, and operated properly, the venting system and/or the
appliances should not suffer from condensation and corrosion. The
venting system and all appliances shall be installed in accordance
with applicable listings, standards, and codes.
The furnace should be sized to provide 100 percent of the design
heating load requirement plus any margin that occurs because of
furnace model size capacity increments. Heating load estimates
can be made using approved methods available from Air Condi-
tioning Contractors of America (Manual J); American Society of
Heating, Refrigerating, and Air-Conditioning Engineers; or other
approved engineering methods. Excessive oversizing of the fur-
nace could cause the furnace and/or vent to fail prematurely.
When a metal vent or metal liner is used, the vent must be in good
condition and be installed in accordance with the vent manufac-
turer's instructions.
28
INTERNAL AREA OF CHIMNEY
(SQ. IN.)
12 19 28
0 55 99
52 74 111
NR 90 125
NR NR 167
NR NR 212
NR NR NR
NR 78 121
NR 94 135
NR 111 149
NR NR 193
NR NR NR
NR NR NR
NR NR 145
NR NR 159
NR NR 175
NR NR NR
NR NR NR
NR NR NR
Not recommended for any vent
configuration
38
141
154
169
212
258
362
166
182
198
247
293
377
196
213
231
283
333
NR