Bryant 340MAV instruction manual Orifice Manifold

		TABLE 9—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT														(Continued)
				FOR USE WITH 040 THROUGH 120 SIZE FURNACES ONLY
	(TABULATED DATA BASED ON 20,000 BTUH PER BURNER, DERATED 2% FOR EACH 1000 FT ABOVE SEA LEVEL)
	ALTITUDE		AVG GAS						SPECIFIC GRAVITY OF NATURAL GAS
			HEAT VALUE		0.58			0.60			0.62			0.64				0.66
		RANGE
		(FT)	AT ALTITUDE	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold		Orifice		Manifold
			(BTU/CU FT)
				No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure		No.		Pressure
			725	43		3.7	43		3.8	42		3.2	42		3.3		42		3.4
			750	43		3.4	43		3.5	43		3.7	43		3.8		42		3.2
Only		4001	775	44		3.7	44		3.8	43		3.4	43		3.5		43		3.7
			800	44		3.5	44		3.6	44		3.7	44		3.8		43		3.4
U.S.A.		to	825	44		3.2	44		3.4	44		3.5	44		3.6		44		3.7
		5000	875	45		3.5	45		3.6	45		3.7	44		3.2		44		3.3
			850	45		3.7	45		3.8	44		3.3	44		3.4		44		3.5
			900	45		3.3	45		3.4	45		3.5	45		3.6		45		3.8
		0%	925	45		3.1	45		3.2	45		3.3	45		3.4		45		3.6
		derate	950	45		3.0	45		3.1	45		3.2	45		3.3		45		3.4
	ALTITUDE		AVG GAS						SPECIFIC GRAVITY OF NATURAL GAS
			HEAT VALUE		0.58			0.60			0.62			0.64				0.66
		RANGE
		(FT)	AT ALTITUDE	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold		Orifice		Manifold
			(BTU/CU FT)
				No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure		No.		Pressure
			700	43		3.6	43		3.7	42		3.2	42		3.3		42		3.4
			725	43		3.4	43		3.5	43		3.6	43		3.7		43		3.8
			750	44		3.6	44		3.7	43		3.4	43		3.5		43		3.6
			775	44		3.4	44		3.5	44		3.6	44		3.7		43		3.4
Only		5001	800	44		3.2	44		3.3	44		3.4	44		3.5		44		3.6
			825	45		3.6	45		3.7	44		3.2	44		3.3		44		3.4
U.S.A.		to	850	45		3.4	45		3.5	45		3.6	45		3.8		44		3.2
			875	45		3.2	45		3.3	45		3.4	45		3.6		45		3.7
		6000	900	45		3.0	45		3.1	45		3.3	45		3.4		45		3.5
			925	45		2.9	45		3.0	45		3.1	45		3.2		45		3.3
			950	45		2.7	45		2.8	45		2.9	45		3.0		45		3.1
		11%	975	45		2.6	45		2.7	45		2.8	45		2.9		45		2.9
		derate	1000	45		2.5	45		2.5	45		2.6	45		2.7		45		2.8
	ALTITUDE		AVG GAS						SPECIFIC GRAVITY OF NATURAL GAS
			HEAT VALUE		0.58			0.60			0.62			0.64				0.66
		RANGE
		(FT)	AT ALTITUDE	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold		Orifice		Manifold
			(BTU/CU FT)
				No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure		No.		Pressure
			650	42		3.2	42		3.3	42		3.4	42		3.5		42		3.6
			675	43		3.6	43		3.7	43		3.8	42		3.2		42		3.3
Only		6001	700	44		3.8	43		3.4	43		3.6	43		3.7		43		3.8
			725	44		3.6	44		3.7	44		3.8	43		3.4		43		3.5
U.S.A.		to	750	44		3.3	44		3.4	44		3.6	44		3.7		44		3.8
		7000	800	45		3.5	45		3.7	45		3.8	44		3.2		44		3.3
			775	45		3.8	44		3.2	44		3.3	44		3.4		44		3.5
			825	45		3.3	45		3.4	45		3.6	45		3.7		45		3.8
		13%	850	45		3.1	45		3.2	45		3.4	45		3.5		45		3.6
		derate	875	45		3.0	45		3.1	45		3.2	45		3.3		45		3.4

*Orifice numbers shown in BOLD are factory installed.

Percents of derate are based on midpoints of U.S. altitude ranges.

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