Bryant 345MAV instruction manual Btu/Cu Ft, Altitude

TABLE 7ÐMODEL 345MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT

(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
			850	43		3.7	43		3.8	42		3.2	42	3.3	42		3.4
			875	43		3.5	43		3.6	43		3.7	43	3.8	42		3.2
Canada			900	44		3.7	43		3.4	43		3.5	43	3.6	43		3.7
		0	925	44		3.5	44		3.7	44		3.8	43	3.4	43		3.5
			950	44		3.4	44		3.5	44		3.6	44	3.7	44		3.8
and		to	975	44		3.2	44		3.3	44		3.4	44	3.5	44		3.6
			1000	45		3.7	45		3.8	44		3.2	44	3.4	44		3.5
U.S.A.
		2000	1025	45		3.5	45		3.6	45		3.7	44	3.2	44		3.3
			1050	45		3.3	45		3.4	45		3.6	45	3.7	45		3.8
			1075	45		3.2	45		3.3	45		3.4	45	3.5	45		3.6
			1100	47		3.6	47		3.7	45		3.2	45	3.4	45		3.5
	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
		U.S.A.	775	43		3.8	42		3.2	42		3.3	42	3.4	42		3.5
		Altitudes	800	43		3.5	43		3.7	43		3.8	42	3.2	42		3.3
Canada		2001	825	44		3.8	43		3.4	43		3.6	43	3.7	43		3.8
		to	850	44		3.6	44		3.7	44		3.8	43	3.5	43		3.6
		3000	875	44		3.4	44		3.5	44		3.6	44	3.7	43		3.4
and		or	900	44		3.2	44		3.3	44		3.4	44	3.5	44		3.6
		Canada	925	45		3.7	45		3.8	44		3.2	44	3.3	44		3.4
U.S.A.
		Altitudes	950	45		3.5	45		3.6	45		3.7	45	3.8	44		3.3
		2000	975	45		3.3	45		3.4	45		3.5	45	3.6	45		3.8
		to	1000	45		3.1	45		3.2	45		3.4	45	3.5	45		3.6
		4500	1025	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
			750	43		3.7	43		3.8	42		3.3	42	3.4	42		3.5
			775	43		3.5	43		3.6	43		3.7	43	3.8	42		3.2
			800	44		3.7	43		3.4	43		3.5	43	3.6	43		3.7
Only		3001	825	44		3.5	44		3.6	44		3.8	43	3.4	43		3.5
			850	44		3.3	44		3.4	44		3.5	44	3.7	44		3.8
U.S.A.		to	875	45		3.8	44		3.2	44		3.3	44	3.5	44		3.6
			900	45		3.6	45		3.7	45		3.8	44	3.3	44		3.4
		4000	925	45		3.4	45		3.5	45		3.6	45	3.7	44		3.2
			950	45		3.2	45		3.3	45		3.4	45	3.5	45		3.7
			975	45		3.0	45		3.2	45		3.3	45	3.4	45		3.5
			1000	45		2.9	45		3.0	45		3.1	45	3.2	45		3.3

* Orifice numbers shown in BOLD are factory installed.

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