Bryant Induced-Combustion 4-Way Multipoise 310AAV - Manual (Page 18)

Installations must be made in accordance with all authorities
having jurisdiction. If possible, the gas supply line should be a
separate line running directly from meter to furnace.
NOTE: In the state of Massachusetts:
1. Gas supply connections MUST be performed by a licensed
plumber or gas fitter.
2. When flexible connectors are used, the maximum length
shall not exceed 36 inches (915 mm).
3. When lever handle type manual equipment shutoff valves are
used, they shall be T-handle valves.
4. The use of copper tubing for gas piping is NOT approved by
the state of Massachusetts.
Refer to Table 6 for recommended gas pipe sizing. Risers must be
used to connect to furnace and to meter. Support all gas piping
with appropriate straps, hangers, etc. Use a minimum of 1 hanger
every 6 ft. Joint compound (pipe dope) should be applied sparingly
and only to male threads of joints. Pipe dope must be resistant to
the action of propane gas.
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in death, personal
injury and/or property damage.
If local codes allow the use of a flexible gas appliance
connector, always use a new listed connector. Do not use a
connector which has previously served another gas appliance.
Black iron pipe shall be installed at the furnace gas control
valve and extend a minimum of 2-in. outside the furnace.
FURNACE OVERHEAT HAZARD
Failure to follow this caution may result in property damage.
Connect gas pipe to gas valve using a backup wrench to avoid
damaging gas controls.
An accessible manual equipment shutoff valve MUST be installed
external to furnace casing and within 6 ft of furnace. A 1/8-in. NPT
plugged tapping, accessible for test gauge connection, MUST be
installed immediately upstream of gas supply connection to
furnace and downstream of manual equipment shutoff valve.
NOTE: The gas valve inlet pressure tap connection is suitable to
use as test gauge connection providing test pressure DOES NOT
exceed maximum 0.5 psig (14-in. wc) stated on gas control valve.
(See Fig. 46.)
Some installations require gas entry on right side of furnace (as
viewed in upflow). (See Fig. 21a.)
Install a sediment trap in riser leading to furnace as shown in Fig
21b. Connect a capped nipple into lower end of tee. Capped nipple
should extend below level of furnace gas controls. Place a ground
joint union between furnace gas control valve and exterior manual
equipment gas shutoff valve. A 1/8-in. NPT plugged tapping,
accessible for test gauge connection, MUST be installed immedi-
ately upstream of gas supply connection to furnace and down-
stream of manual equipment shutoff valve.
Piping should be pressure and leak tested in accordance with
NFGC in the United States or NSCNGPIC in Canada, local, and
national plumbing and gas codes before the furnace has been
connected. After all connections have been made, purge lines and
check for leakage at furnace prior to operating furnace.
If pressure exceeds 0.5 psig (14-in. wc), gas supply pipe must be
disconnected from furnace and capped before and during supply
pipe pressure test. If test pressure is equal to or less than 0.5 psig
(14-in. wc), turn off electric shutoff switch located on furnace gas
control valve and accessible manual equipment shutoff valve
before and during supply pipe pressure test. After all connections
have been made, purge lines and check for leakage at furnace prior
to operating furnace.
The gas supply pressure shall be within the maximum and
minimum inlet supply pressures marked on the rating plate with
the furnace burners ON and OFF.
Table 5—Air Delivery - CFM (With Filter)* (Continued)
FURNACE
SIZE
RETURN-AIR
INLET
SPEED
EXTERNAL STATIC PRESSURE (IN. WC)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
048135
Bottom
or
Side(s)
High
Med-High
Med-Low
2090
1790
1545 2010
1755
1525 1930
1705
1500 1835
1640
1450 1710
1550
1380 1590
1465
1315 1470
1360
1215 1335
1210
1005 1025
945
855
835
785
670
066135
Bottom
Only
High
Med-High
Med-Low
2485
2195
1880 2400
2150
1850 2310
2090
1820 2215
2000
1780 2110
1920
1715 2000
1825
1635 1880
1720
1540 1725
1565
1415 1535
1405
1290 1355
1255
1160
Bottom, Sides or
1 Side & Bottom
High
Med-High
Med-Low
--
2180
1880
--
2145
1850
2385
2060
1820 2305
2010
1780 2195
1945
1715 2085
1865
1635 1960
1765
1540 1825
1660
1415 1670
1515
1290 1465
1325
1160
1 Side Only
High
Med-High
Med-Low
--
2135
1880
--
2085
1850
2245
2035
1820 2155
1975
1780 2055
1895
1715 1940
1795
1635 1825
1685
1540 1695
1565
1415 1555
1445
1290 1385
1265
1160
060155
Bottom
Only
High
Med-High
Med-Low
2465
2115
1800 2430
2105
1790 2375
2075
1770 2305
2030
1735 2230
1980
1695 2110
1910
1640 2000
1830
1570 1865
1725
1465 1725
1590
1345 1545
1425
1225
Both Sides Or
1 Side & Bottom
High
Med-High
Med-Low
--
2155
1800
--
2135
1790
2375
2095
1770 2285
2040
1735 2200
1975
1695 2105
1895
1640 1995
1790
1570 1870
1685
1465 1730
1550
1345 1570
1400
1225
1 Side Only
High
Med-High
Med-Low
--
2140
1800
--
2095
1790
2260
2040
1770 2180
1975
1735 2085
1890
1695 1975
1810
1640 1865
1705
1570 1740
1595
1465 1605
1480
1345 1455
1325
1225
*A filter is required for each return-air inlet. Airflow performance included 1-in. washable filter media such as contained in factory-authorized accessory filter rack. To
determine airflow performance without this filter, assume an additional 0.1 in. wc available external static pressure.
--
Indicates unstable operating conditions.
17
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