Bryant 313AAV User Manual

Page 28

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

hoodequipped 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

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. 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 NFPA54/ANSI Z223.1--2006, Section 12.10

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 ©NFPA & AGA

Table 8 – Combined Appliance Maximum Input Rating in

Thousands of BTUH per Hour

VENT HEIGHT

FT. (M)

INTERNAL AREA OF CHIMNEY

(MM

)

(7741)

(12258)

(18064)

(24516)

6 (1.8)

119

178

257

8 (2.4)

130

193

279

10 (3.0)

138

207

299

15 (4.5)

152

233

334

20 (6.0)

250

368

30 (9.1)

404

Table 9 – Minimum Allowable Input Rating of Space--Heat-

ing Appliance in Thousands of BTUH per Hour

VENT HEIGHT

FT (M)

INTERNAL AREA OF CHIMNEY

. (MM

)

(7741)

(12258)

(18064)

(24516)

Local 99% Winter Design

Temperature: 17 to 26_F (---8 to ---3_C)

6 (1.8)

141

8 (2.4)

111

154

10 (3.0)

125

169

15 (4.6)

167

212

20 (6.1)

212

258

30 (9.1)

362

Local 99% Winter Design

Temperature: 5 to 16_F* (---15 to ---9_C)

6 (1.8)

121

166

8 (2.4)

135

182

10 (3.0)

111

149

198

15 (4.6)

193

247

20 (6.1)

293

30 (9.1)

377

Local 99% Winter Design

Temperature: ---10 to 4_F* (---23 to ---16_C)

6 (1.8)

145

196

8 (2.4)

159

213

10 (3.0)

175

231

15 (4.6)

283

20 (6.1)

333

30 (9.1)

Local 99% Winter Design

Temperature: ---11_F (---24_C) or lower

Not recommended for any vent configuration.

*The 99.6% heating db temperatures found in the 1997 or 2001 ASHRAE

Fundamentals Handbook, Climatic Design Information chapter, Table 1A

(United States) and 2A (Canada) or the 2005 ASHRAE Fundamentals

handbook, Climatic Design Information chapter, and the CD---ROM in-

cluded with the 2005 ASHRAE Fundamentals Handbook.

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
Conditioning Contractors of America (Manual J); American

Society of Heating, Refrigerating, and Air--Conditioning

Engineers; or other approved engineering methods. Excessive
oversizing of the furnace 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 manufacturer’s instructions.

313A