Bryant 315AAV instruction manual Specific Gravity of Natural GAS Altitude Range

315AAV

Table 14 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate

(Tabulated Data Based on 22,000 Btuh High-Heat/14,500 Btuh for Low-Heat per Burner, Derated 4 Percent for Each 1000 Ft.

(305 M) Above Sea Level)

			AVG. GAS				SPECIFIC GRAVITY OF NATURAL GAS
ALTITUDE RANGE					0.58			0.60			0.62			0.64
			HEAT VALUE
	FT. (M)			Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
			(BTUH/CU FT.)			Pressure			Pressure			Pressure			Pressure
				No.			No.			No.			No.
						High/Low			High/Low			High/Low			High/Low
			900	42		3.5/1.5	42		3.6/1.6	42		3.7/1.6	41		3.5/1.5
			925	42		3.3/1.4	42		3.4/1.5	42		3.5/1.5	42		3.7/1.6
		0 to	950	43		3.8/1.7	42		3.3/1.4	42		3.4/1.5	42		3.5/1.5
USA			975	43		3.6/1.6	43		3.8/1.6	42		3.2/1.4	42		3.3/1.4
		2000	1000	43		3.5/1.5	43		3.6/1.6	43		3.7/1.6	43		3.8/1.7
		(0 to 610)
			1025	43		3.3/1.4	43		3.4/1.5	43		3.5/1.5	43		3.6/1.6
			1050	44		3.6/1.6	43		3.2/1.4	43		3.4/1.5	43		3.5/1.5
			1075	44		3.4/1.5	44		3.5/1.5	43		3.2/1.4	43		3.3/1.4
			1100	44		3.3/1.4	44		3.4/1.5	44		3.5/1.5	43		3.2/1.4
							SPECIFIC GRAVITY OF NATURAL GAS
ALTITUDE RANGE			AVG. GAS		0.58			0.60			0.62			0.64
			HEAT VALUE			Manifold			Manifold			Manifold			Manifold
	FT. (M)			Orifice			Orifice			Orifice		Pressure	Orifice
			(BTUH/CU FT.)			Pressure			Pressure						Pressure
				No.			No.			No.		High/Low	No.
						High/Low			High/Low						High/Low
			800	42		3.4/1.5	42		3.5/1.5	42		3.6/1.6	42		3.7/1.6
			825	42		3.2/1.4	42		3.3/1.4	42		3.4/1.5	42		3.5/1.5
		2001 to	850	43		3.7/1.6	43		3.8/1.6	42		3.2/1.4	42		3.3/1.4
			875	43		3.5/1.5	43		3.6/1.6	43		3.7/1.6	43		3.8/1.7
USA		3000 (610
			900	43		3.3/1.4	43		3.4/1.5	43		3.5/1.5	43		3.6/1.6
		to 914)
			925	44		3.5/1.5	43		3.2/1.4	43		3.3/1.4	43		3.4/1.5
			950	44		3.4/1.5	44		3.5/1.5	44		3.6/1.6	43		3.2/1.4
			975	44		3.2/1.4	44		3.3/1.4	44		3.4/1.5	44		3.5/1.5
			1000	45		3.7/1.6	45		3.8/1.7	44		3.2/1.4	44		3.4/1.5
							SPECIFIC GRAVITY OF NATURAL GAS
ALTITUDE RANGE			AVG. GAS		0.58			0.60			0.62			0.64
			HEAT VALUE			Manifold			Manifold			Manifold			Manifold
	FT. (M)			Orifice			Orifice			Orifice		Pressure	Orifice
			(BTUH/CU FT.)			Pressure			Pressure						Pressure
				No.			No.			No.		High/Low	No.
						High/Low			High/Low						High/Low
			775	42		3.2/1.4	42		3.3/1.4	42		3.4/1.5	42		3.5/1.5
		3001 to	800	43		3.6/1.6	43		3.8/1.6	42		3.2/1.4	42		3.3/1.4
			825	43		3.4/1.5	43		3.5/1.5	43		3.7/1.6	43		3.8/1.6
		4000
USA			850	43		3.2/1.4	43		3.3/1.4	43		3.4/1.5	43		3.6/1.5
		(914 to	875	44		3.5/1.5	44		3.6/1.6	43		3.3/1.4	43		3.4/1.5
		1219)
			900	44		3.3/1.4	44		3.4/1.5	44		3.5/1.5	43		3.2/1.4
			925	45		3.8/1.6	44		3.2/1.4	44		3.3/1.5	44		3.4/1.5
			950	46		3.8/1.6	45		3.7/1.6	45		3.8/1.7	44		3.3/1.4
							SPECIFIC GRAVITY OF NATURAL GAS
ALTITUDE RANGE			AVG. GAS		0.58			0.60			0.62			0.64
						Manifold			Manifold			Manifold			Manifold
	FT. (M)		HEAT VALUE	Orifice			Orifice			Orifice		Pressure	Orifice
						Pressure			Pressure						Pressure
			(BTUH/CU FT.)	No.			No.			No.		High/Low	No.
						High/Low			High/Low						High/Low
			750	43	3.6/1.6		43	3.8/1.6		42	3.2/1.4		42	3.3/1.4
		4001 to	775	43	3.4/1.5		43	3.5/1.5		43	3.6/1.6		43	3.8/1.6
			800	43	3.2/1.4		43	3.3/1.4		43	3.4/1.5		43	3.5/1.5
	5000
USA			825	44	3.4/1.5		44	3.6/1.5		43	3.2/1.4		43	3.3/1.4
		(1219 to
			850	44	3.2/1.4		44	3.4/1.5		44	3.5/1.5		44	3.6/1.6
	1524)
			875	45	3.7/1.6		45	3.8/1.7		44	3.3/1.4		44	3.4/1.5
			900	46	3.7/1.6		46	3.8/1.7		45	3.7/1.6		44	3.2/1.4
			925	46	3.5/1.5		46	3.6/1.6		46	3.7/1.6		46	3.8/1.7

* Orifice numbers 43 are factory installed

42