Bryant 315AAV instruction manual Altitude Range, Btuh/Cu

315AAV

Table 15 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate

(Tabulated Data Based on 21,000 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			HEAT VALUE
					0.58			0.60			0.62			0.64
	FT. (M)		(BTUH/CU
				Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
			FT.)			Pressure			Pressure			Pressure			Pressure
				No.			No.			No.			No.
						High/Low			High/Low			High/Low			High/Low
			900	42		3.2/1.5	42		3.3/1.6	42		3.4/1.6	42		3.5/1.7
			925	43		3.7/1.8	43		3.8/1.8	42		3.2/1.5	42		3.3/1.6
		0 to	950	43		3.5/1.7	43		3.6/1.7	43		3.7/1.8	43		3.8/1.8
			975	43		3.3/1.6	43		3.4/1.6	43		3.5/1.7	43		3.7/1.7
USA		2000
			1000	44		3.6/1.7	43		3.3/1.6	43		3.4/1.6	43		3.5/1.7
		(0 to 610)
			1025	44		3.4/1.6	44		3.6/1.7	43		3.2/1.5	43		3.3/1.6
			1050	44		3.3/1.6	44		3.4/1.6	44		3.5/1.7	43		3.2/1.5
			1075	45		3.8/1.8	44		3.2/1.5	44		3.3/1.6	44		3.4/1.6
			1100	46		3.8/1.8	45		3.7/1.8	44		3.2/1.5	44		3.3/1.6
							SPECIFIC GRAVITY OF NATURAL GAS
			AVG. GAS		0.58			0.60			0.62			0.64
ALTITUDE RANGE			HEAT VALUE	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
	FT. (M)					Pressure			Pressure			Pressure			Pressure
			(BTUH/CU FT.)	No.			No.			No.			No.
						High/Low			High/Low			High/Low			High/Low
			800	43		3.8/1.8	42		3.2/1.5	42		3.3/1.6	42		3.4/1.6
			825	43		3.5/1.7	43		3.7/1.7	43		3.8/1.8	42		3.2/1.5
		2001 to	850	43		3.3/1.6	43		3.5/1.6	43		3.6/1.7	43		3.7/1.8
USA			875	43		3.2/1.5	43		3.3/1.6	43		3.4/1.6	43		3.5/1.7
		3000 (610	900	44		3.4/1.6	44		3.5/1.7	43		3.2/1.5	43		3.3/1.6
		to 914)	925	44		3.2/1.5	44		3.3/1.6	44		3.5/1.6	44		3.6/1.7
			950	45		3.7/1.8	45		3.8/1.8	44		3.3/1.6	44		3.4/1.6
			975	46		3.7/1.8	46		3.8/1.8	45		3.8/1.8	44		3.2/1.5
			1000	46		3.5/1.7	46		3.6/1.7	46		3.8/1.8	45		3.7/1.8
							SPECIFIC GRAVITY OF NATURAL GAS
			AVG. GAS		0.58			0.60			0.62			0.64
ALTITUDE RANGE			HEAT VALUE	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
	FT. (M)					Pressure			Pressure			Pressure			Pressure
			(BTUH/CU FT.)	No.			No.			No.			No.
						High/Low			High/Low			High/Low			High/Low
			775	43		3.5/1.7	43		3.7/1.7	43		3.8/1.8	42		3.2/1.5
			800	43		3.3/1.6	43		3.4/1.6	43		3.5/1.7	43		3.7/1.7
		3001 to	825	44		3.6/1.7	43		3.2/1.5	43		3.3/1.6	43		3.4/1.6
			850	44		3.4/1.6	44		3.5/1.7	44		3.6/1.7	43		3.2/1.5
USA		4000 (914
			875	45		3.8/1.8	44		3.3/1.6	44		3.4/1.6	44		3.5/1.7
		to 1219)
			900	46		3.8/1.8	45		3.8/1.8	44		3.2/1.5	44		3.3/1.6
			925	46		3.6/1.7	46		3.7/1.8	45		3.7/1.8	45		3.8/1.8
			950	46		3.4/1.6	46		3.5/1.7	46		3.7/1.7	46		3.8/1.8
							SPECIFIC GRAVITY OF NATURAL GAS
			AVG. GAS		0.58			0.60			0.62			0.64
ALTITUDE RANGE				Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
			HEAT VALUE
	FT. (M)					Pressure			Pressure			Pressure			Pressure
			(BTUH/CU FT.)	No.			No.			No.			No.
						High/Low			High/Low			High/Low			High/Low
			750	43	3.3/1.6		43	3.4/1.6		43	3.5/1.7		43	3.6/1.7
		4001 to	775	44	3.6/1.7		43	3.2/1.5		43	3.3/1.6		43	3.4/1.6
			800	44	3.3/1.6		44	3.4/1.6		44	3.6/1.7		43	3.2/1.5
	5000
USA			825	45	3.8/1.8		44	3.2/1.5		44	3.4/1.6		44	3.5/1.6
		(1219 to	850	46	3.8/1.8		45	3.7/1.8		45	3.8/1.8		44	3.3/1.6
	1524)		875	46	3.5/1.7		46	3.7/1.7		46	3.8/1.8		45	3.7/1.8
			900	47	3.8/1.8		46	3.5/1.7		46	3.6/1.7		46	3.7/1.8
			925	47	3.6/1.7		47	3.7/1.8		47	3.8/1.8		46	3.5/1.7

* Orifice numbers 43 are factory installed

44