Bryant 310AAV instruction manual Specific Gravity of Natural GAS Altitude Range, Btu/Cu Ft

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

(Tabulated data based on 22,000 btuh 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)		AT ALTITUDE
			Orifice	Manifold	Orifice	Manifold	Orifice	Manifold	Orifice	Manifold
		(BTU/CU FT.)	No.	Pressure	No.	Pressure	No.	Pressure	No.	Pressure
		900	42	3.5	42	3.6	42	3.7	41	3.5
		925	42	3.3	42	3.4	42	3.5	42	3.7
	0 to	950	43	3.8	42	3.3	42	3.4	42	3.5
		975	43	3.6	43	3.8	42	3.2	42	3.3
	2000
U.S.A.		1000	43	3.5	43	3.6	43	3.7	43	3.8
	(0 to
		1025	43	3.3	43	3.4	43	3.5	43	3.6
	610)
		1050	44	3.6	43	3.2	43	3.4	43	3.5
		1075	44	3.4	44	3.5	43	3.2	43	3.3
		1100	44	3.3	44	3.4	44	3.5	43	3.2
		800	42	3.4	42	3.5	42	3.6	42	3.7
		825	42	3.2	42	3.3	42	3.4	42	3.5
	2001 to	850	43	3.7	43	3.8	42	3.2	42	3.3
	3000	875	43	3.5	43	3.6	43	3.7	43	3.8
U.S.A.	(610 to
		900	43	3.3	43	3.4	43	3.5	43	3.6
	914)
		925	43	3.1	43	3.2	43	3.3	43	3.4
		950	43	2.9	43	3.0	43	3.1	43	3.2
		975	43	2.8	43	2.9	43	3.0	43	3.1
		1000	43	2.6	43	2.7	43	2.8	43	2.9
		775	42	3.2	42	3.3	42	3.4	42	3.5
		800	43	3.6	43	3.8	42	3.2	42	3.3
	3001 to	825	43	3.4	43	3.5	43	3.7	43	3.8
U.S.A.	4000	850	43	3.2	43	3.3	43	3.4	43	3.6
	(914 to	875	43	3.0	43	3.1	43	3.3	43	3.4
	1219)
		900	43	2.9	43	3.0	43	3.1	43	3.2
		925	43	2.7	43	2.8	43	2.9	43	3.0
		950	43	2.6	43	2.7	43	2.8	43	2.8
		750	43	3.6	43	3.8	42	3.2	42	3.3
		775	43	3.4	43	3.5	43	3.6	43	3.8
	4001 to	800	43	3.2	43	3.3	43	3.4	43	3.5
U.S.A.	5000	825	43	3.0	43	3.1	43	3.2	43	3.3
	(1219 to	850	43	2.8	43	2.9	43	3.0	43	3.1
	1524)
		875	43	2.7	43	2.8	43	2.9	43	2.9
		900	43	2.5	43	2.6	43	2.7	43	2.8
		925	43	2.4	43	2.5	43	2.6	43	2.6

* Orifice numbers 43 are factory installed.

310AAV

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