Bryant 340MAV instruction manual FOR USE WITH 140 SIZE FURNACES ONLY

TABLE 10—MODEL 340MAV ORIFICE SIZE AND MANIFOLD PRESSURE FOR CORRECT INPUT

FOR USE WITH 140 SIZE FURNACES ONLY

(TABULATED DATA BASED ON 23,000 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	41		3.6	41		3.7	41		3.8	40		3.6	40		3.8
			875	42		3.8	41		3.5	41		3.6	41		3.7	41		3.8
Canada			900	42		3.5	42		3.7	42		3.8	41		3.5	41		3.6
		0	925	42		3.4	42		3.5	42		3.6	42		3.7	42		3.8
			950	42		3.2	42		3.3	42		3.4	42		3.5	42		3.6
and		to	975	43		3.7	43		3.8	42		3.2	42		3.3	42		3.4
			1000	43		3.5	43		3.6	43		3.7	42		3.2	42		3.3
U.S.A.
		2000	1025	43		3.3	43		3.4	43		3.6	43		3.7	43		3.8
			1050	43		3.2	43		3.3	43		3.4	43		3.5	43		3.6
		0%	1075	44		3.5	44		3.6	43		3.2	43		3.3	43		3.4
		derate	1100	44		3.3	44		3.4	44		3.5	43		3.2	43		3.3
	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	41		3.7	41		3.8	40		3.6	40		3.7	39		3.6
		Altitudes	800	42		3.8	41		3.6	41		3.7	41		3.8	40		3.6
Canada		2001to	825	42		3.6	42		3.7	41		3.5	41		3.6	41		3.7
		3000	850	42		3.4	42		3.5	42		3.6	42		3.7	41		3.5
		or	875	42		3.2	42		3.3	42		3.4	42		3.5	42		3.6
and		Canada	900	43		3.7	43		3.8	42		3.2	42		3.3	42		3.4
		Altitude	925	43		3.5	43		3.6	43		3.7	42		3.2	42		3.3
U.S.A.
		2001 to	950	43		3.3	43		3.4	43		3.5	43		3.7	43		3.8
		4500	975	43		3.1	43		3.3	43		3.4	43		3.5	43		3.6
		5%	1000	43		3.0	43		3.1	43		3.2	43		3.3	43		3.4
		derate	1025	43		2.8	43		2.9	43		3.0	43		3.1	43		3.2
	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	41		3.6	41		3.8	40		3.6	40		3.7	40		3.8
			775	42		3.8	41		3.5	41		3.6	41		3.7	40		3.6
			800	42		3.5	42		3.7	42		3.8	41		3.5	41		3.6
Only		3001	825	42		3.3	42		3.4	42		3.6	42		3.7	42		3.8
			850	43		3.8	42		3.2	42		3.4	42		3.5	42		3.6
U.S.A.		to	875	43		3.6	43		3.7	42		3.2	42		3.3	42		3.4
			900	43		3.4	43		3.5	43		3.6	43		3.8	42		3.2
		4000	925	43		3.2	43		3.3	43		3.5	43		3.6	43		3.7
			950	43		3.1	43		3.2	43		3.3	43		3.4	43		3.5
		7%	975	43		2.9	43		3.0	43		3.1	43		3.2	43		3.3
		derate	1000	43		2.8	43		2.9	43		3.0	43		3.0	43		3.1

*Orifice numbers shown in BOLD are factory installed.

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

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