Bryant 310JAV 900 925 950 975, 850 3000 875 900 Canada 925, 775 800, 875 900 925 950, 800 825

TABLE 11—Orifice Size* and Manifold Pressure For Gas Input Rate

(Tabulated Data Based On 21,000 Btuh Per Burner, Derated 4 Percent For Each 1000 Ft Above Sea Level)

ALTITUDE		AVG GAS				SPECIFIC GRAVITY OF NATURAL GAS
				0.58			0.60			0.62			0.64
RANGE		HEAT VALUE
(FT)		(BTU/CU FT)	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
			No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure
Canada		900			3.2	42		3.3	42		3.4	42		3.5
			42
		925	43		3.7	43		3.8	42		3.2	42		3.3
		950	43		3.5	43		3.6	43		3.7	43		3.8
	0
and		975	43		3.3	43		3.4	43		3.5	43		3.7
	to
		1000	44		3.6	43		3.3	43		3.4	43		3.5
	2000
U.S.A.		1025	44		3.4	44		3.6	43		3.2	43		3.3
		1050	44		3.3	44		3.4	44		3.5	43		3.2
		1075	45		3.8	44		3.2	44		3.3	44		3.4
		1100	46		3.8	45		3.7	44		3.2	44		3.3
ALTITUDE		AVG GAS				SPECIFIC GRAVITY OF NATURAL GAS
				0.58			0.60			0.62			0.64
RANGE		HEAT VALUE
(FT)		(BTU/CU FT)	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
			No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure
	U.S.A.	800	43		3.8	42		3.2	42		3.3	42		3.4
Canada	Altitudes
		825	43		3.5	43		3.7	43		3.8	42		3.2
	2001
		850	43		3.3	43		3.5	43		3.6	43		3.7
	to
and	3000	875	43		3.2	43		3.3	43		3.4	43		3.5
	or
		900	43		3.0	43		3.1	43		3.2	43		3.3
	Canada
U.S.A.		925	43		2.8	43		2.9	43		3.0	43		3.1
	Altitudes
		950	43		2.7	43		2.8	43		2.9	43		2.9
	2000
	to	975	43		2.5	43		2.6	43		2.7	43		2.8
	4500
		1000	43		2.4	43		2.5	43		2.6	43		2.7
ALTITUDE		AVG GAS				SPECIFIC GRAVITY OF NATURAL GAS
				0.58			0.60			0.62			0.64
RANGE		HEAT VALUE
(FT)		(BTU/CU FT)	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
			No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure
		775			3.5	43		3.7	43		3.8	42		3.2
			43
		800	43		3.3	43		3.4	43		3.5	43		3.7
	3001	825	43		3.1	43		3.2	43		3.3	43		3.4
U.S.A. Only		850	43		2.9	43		3.0	43		3.1	43		3.2
	to
	4000	875	43		2.8	43		2.9	43		3.0	43		3.1
		900	43		2.6	43		2.7	43		2.8	43		2.9
		925	43		2.5	43		2.6	43		2.7	43		2.7
		950	43		2.4	43		2.4	43		2.5	43		2.6
ALTITUDE		AVG GAS				SPECIFIC GRAVITY OF NATURAL GAS
				0.58			0.60			0.62			0.64
RANGE		HEAT VALUE
(FT)		(BTU/CU FT)	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
			No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure
		750			3.3	43		3.4	43		3.5	43		3.6
			43
Only		775	43		3.1	43		3.2	43		3.3	43		3.4
	4001
		800	43		2.9	43		3.0	43		3.1	43		3.2
U.S.A.	to	825	43		2.7	43		2.8	43		2.9	43		3.0
	5000	850	43		2.6	43		2.7	43		2.8	43		2.8
		875	43		2.4	43		2.5	43		2.6	43		2.7
		900	43		2.3	43		2.4	43		2.5	43		2.5
		925	43		2.2	43		2.2	43		2.3	43		2.4

* Orifice numbers 43 are factory installed

39