In Thousands Of Btuh Per Hour - Bryant 800SB Operating Instructions Manual

800SB/801SB: Installation, Start–Up, Operating and Service and Maintenance Instructions
Exterior Masonry Chimney FAN + NAT Installations with Type-B
Double Wall Vent Connectors
Table 7 – Combined Appliance Maximum Input Rating

in Thousands of BTUh per Hour

INTERNAL AREA OF CHIMNEY
VENT HEIGHT
FT. (M)
12
(7741)
6 (1.8) 74
8 (2.4) 80
10 (3.0) 84
15 (4.5) NR
20 (6.0) NR
30 (9.1) NR
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.
Table 8 – Minimum Allowable Input Rating of Space-Heating
Appliance in Thousands of BTUh per Hour
VENT HEIGHT
FT (M)
12
(7741)
Local 99% Winter Design
Temperature: 17 to 26°F (-8 to -3°C)
6 (1.8) 0
8 (2.4) 52
10 (3.0) NR
15 (4.6) NR
20 (6.1) NR
30 (9.1) NR
Local 99% Winter Design
Temperature: 5 to 16°F* (-15 to -9°C)
6 (1.8) NR
8 (2.4) NR
10 (3.0) NR
15 (4.6) NR
20 (6.1) NR
30 (9.1) NR
Local 99% Winter Design
Temperature: -10 to 4°F* (-23 to -16°C)
6 (1.8) NR
8 (2.4) NR
10 (3.0) NR
15 (4.6) NR
20 (6.1) NR
30 (9.1) NR
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) or the 2005
ASHRAE Fundamentals handbook, Climatic Design Information chapter, and the
CD-ROM included with the 2005 ASHRAE Fundamentals Handbook.
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. 30 to perform a chimney inspection. If the inspection of
a previously used tile-lined chimney:
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
©
NFPA & AGA
2 2
IN (MM )
19 28
(12258) (18064) (24516)
119 178
130 193
138 207
152 233
NR 250
NR NR
INTERNAL AREA OF CHIMNEY
2 2
IN . (MM )
19 28
(12258) (18064) (24516)
55 99
74 111
90 125
NR 167
NR 212
NR NR
78 121
94 135
111 149
NR 193
NR NR
NR NR
NR 145
NR 159
NR 175
NR NR
NR NR
NR NR
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 current edition of NFGC NFPA54/ANSI
Z223.1, Section 12.10 for additional information on condensate
drains.
38
b. Indicates the chimney exceeds the maximum permissible size in
the tables, the chimney should be rebuilt or relined to conform to
257
the requirements of the equipment being installed and the
279 authority having jurisdiction.
299
A chimney without a clay tile liner, which is otherwise in good
334 condition, shall be rebuilt to conform to current edition of ANSI/NFPA
211 or be lined with a UL listed metal liner or UL listed Type-B vent.
368
Relining with a listed metal liner or Type-B vent is considered to be a
404
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.
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
38
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
141
size capacity increments. Heating load estimates can be made using
154
approved methods available from Air Conditioning Contractors of
169
America (Manual J); American Society of Heating, Refrigerating, and
212 Air-Conditioning Engineers; or other approved engineering methods.
Excessive oversizing of the furnace could cause the furnace and/or vent
258
to fail prematurely. When a metal vent or metal liner is used, the vent
362
must be in good condition and be installed in accordance with the vent
manufacturer's instructions.
To prevent condensation in the furnace and vent system, the following
166
precautions must be observed:
182
1. The return-air temperature must be at least 60°F (16°C)db except
198
for brief periods of time during warm-up from setback at no lower
247
than 55°F (13°C) db or during initial start-up from a standby
293
condition.
377
2. Adjust the gas input rate per the installation instructions. Low gas
input rate causes low vent gas temperatures, causing condensation
and corrosion in the furnace and/or venting system. Derating is
196
permitted only for altitudes above 2000 ft. (610 M).
213
3. Adjust the air temperature rise to the midpoint of the rise range or
231
slightly above. Low air temperature rise can cause low vent gas
283
temperature and potential for condensation problems.
333
4. Set the thermostat heat anticipator or cycle rate to reduce short
NR
cycling.
BURN HAZARD
Failure to follow this caution may cause personal injury.
Hot vent pipe is within reach of small children when installed in
downflow position. See the following instruction.
Air for combustion must not be contaminated by halogen compounds
which include chlorides, fluorides, bromides, and iodides. These
compounds are found in many common home products such as
20
CAUTION
!