Bryant 313AAV instruction manual Air Delivery - CFM With Filter, Maximum Capacity of Pipe

313A

Table 5 – Air Delivery - CFM (With Filter)*

UNIT SIZE	RETURN---AIR	SPEED				EXTERNAL STATIC PRESSURE (In. wc)
	SUPPLY
			0.1	0.2	0.3		0.4	0.5	0.6	0.7	0.8	0.9	1
		5	1185	1145	1115		1075	1035	980	905	820	720	580
045---08/	Bottom or	4	920	880	835		800	755	720	680	645	605	540
		3	735	685	625		585	530	490	435	395	345	295
024045	Side(s)
		2	820	765	725		670	630	580	545	490	455	405
		1	650	595	535		490	430	390	330	280	235	--- ---
		5	1625	1585	1535		1495	1460	1415	1365	1295	1220	1125
070---16 /	Bottom or	4	1405	1360	1320		1280	1240	1195	1155	1115	1070	1030
		3	1240	1200	1155		1110	1065	1020	975	935	895	850
048070	Side(s)
		2	1190	1140	1095		1050	1000	955	915	870	830	790
		1	1035	985	930		885	835	785	745	695	650	600
		5	1845	1800	1755		1710	1665	1595	1500	1400	1275	1105
090---16 /	Bottom or	4	1590	1545	1500		1455	1410	1365	1315	1270	1180	1000
		3	1365	1320	1270		1215	1170	1125	1070	1025	955	900
048090	Side(s)
		2	1225	1160	1110		1060	1010	950	895	830	770	710
		1	1100	1030	960		875	805	730	645	570	505	425
		5	2255	2205	2150		2100	2040	1985	1920	1835	1735	1615
110---20 /	Bottom or	4	1600	1525	1465		1400	1335	1275	1210	1150	1080	1015
		3	1945	1890	1830		1770	1715	1655	1600	1545	1480	1430
060110	Side(s)
		2	1420	1340	1280		1200	1140	1065	1005	925	865	790
		1	1280	1205	1140		1055	990	910	840	760	695	630
		5	2295	2240	2185		2125	2070	2005	1925	1805	1670	1545
135---20 /	Bottom or	4	1725	1660	1605		1545	1460	1395	1340	1285	1230	1170
	Side(s)
		3	1910	1865	1800		1745	1685	1610	1545	1485	1435	1380
060135
		2	1630	1575	1510		1435	1365	1300	1245	1185	1130	1065
		1	1430	1355	1285		1200	1125	1075	1015	945	855	800
*A filter is required for each return ---air inlet. Airflow performance included 3/4---in. (19 mm) 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.

Table 6 – Maximum Capacity of Pipe*

NOMINAL IRON	INTERNAL				LENGTH OF PIPE --- FT. (M)
PIPE	DIAMETER
SIZE IN. (mm)	In. (mm)	10		20		30		40		50
1/2 (13)	0.622 (16)	175	(53)	120	(37)	97	(30)	82	(25)	73	(22)
3/4 (19)	0.824 (21)	360 (110)		250	(76)	200 (61)		170 (52)		151 (46)
1 (25)	1.049 (27)	680 (207)		465	(142)	375	(114)	320 (98)		285 (87)
1---1/4 (32)	1.380 (35)	1400	(427)	950 (290)		770	(235)	660	(201)	580	(177)
1---1/2 (38)	1.610 (41)	2100	(640)	1460	(445)	1180 (360)		990	(301)	900	(274)

*Cubic ft. of natural gas per hr for gas pressures of 0.5 psig (14---in. wc) or less and a pressure drop of 0.5---in wc (based on a 0.60 specific gravity gas). Ref: Chapter 6 ANSI Z223---2006/NFPA 54---2006.

Piping should be pressure and leak tested in accordance with NFGC in the United States or CAN/CSA-B149.1-05 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.

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