Carrier 58TMA operating instructions 625 1.4

Table 10—Model 58TMA Orifice Size and Manifold Pressure for Correct Input—Continued

(TABULATED DATA BASED ON 21,000 BTUH HIGH HEAT/13,500 BTUH LOW HEAT PER BURNER,

DERATED 4% FOR EACH 1000 FT ABOVE SEA LEVEL)*

			AVG GAS						SPECIFIC GRAVITY OF NATURAL GAS
	ALTITUDE				0.58			0.60			0.62			0.64			0.66
			HEAT VALUE
		RANGE	AT ALTITUDE	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
		(FT)				Pressure			Pressure			Pressure			Pressure			Pressure
			(BTU/CU FT)	No.			No.			No.			No.			No.
						High/Low			High/Low			High/Low			High/Low			High/Low
			625	44		3.3/1.4	44		3.4/1.4	44		3.5/1.5	44		3.6/1.5	44		3.7/1.5
			650	45		3.7/1.5	45		3.8/1.6	44		3.3/1.3	44		3.4/1.4	44		3.5/1.4
Only			675	46		3.6/1.5	46		3.7/1.5	46		3.8/1.6	45		3.8/1.6	44		3.2/1.3
		7001	700	47		3.8/1.6	46		3.4/1.4	46		3.6/1.5	46		3.7/1.5	46		3.8/1.6
			725	47		3.5/1.5	47		3.6/1.5	47		3.8/1.6	46		3.4/1.4	46		3.5/1.5
U.S.A.
		to	750	48		3.7/1.5	47		3.4/1.4	47		3.5/1.5	47		3.6/1.5	47		3.7/1.5
			775	48		3.5/1.5	48		3.6/1.5	48		3.8/1.6	47		3.4/1.4	47		3.5/1.4
		8000	800	48		3.3/1.4	48		3.4/1.4	48		3.5/1.5	48		3.6/1.5	48		3.7/1.5
			825	49		3.6/1.5	49		3.8/1.6	48		3.3/1.4	48		3.4/1.4	48		3.5/1.5
			850	49		3.4/1.4	49		3.5/1.5	49		3.7/1.5	49		3.8/1.6	48		3.3/1.4
			AVG GAS						SPECIFIC GRAVITY OF NATURAL GAS
	ALTITUDE				0.58			0.60			0.62			0.64			0.66
			HEAT VALUE
		RANGE
			AT ALTITUDE	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
		(FT)				Pressure			Pressure			Pressure			Pressure			Pressure
			(BTU/CU FT)	No.			No.			No.			No.			No.
						High/Low			High/Low			High/Low			High/Low			High/Low
			600	45		3.7/1.5	44		3.2/1.3	44		3.3/1.4	44		3.4/1.4	44		3.5/1.4
			625	46		3.6/1.5	46		3.7/1.5	46		3.8/1.6	45		3.8/1.6	44		3.2/1.3
Only		8001	650	47		3.8/1.6	46		3.4/1.4	46		3.5/1.5	46		3.7/1.5	46		3.8/1.6
			675	47		3.5/1.4	47		3.6/1.5	47		3.7/1.5	47		3.8/1.6	46		3.5/1.4
		to	700	48		3.7/1.5	48		3.8/1.6	47		3.5/1.4	47		3.6/1.5	47		3.7/1.5
U.S.A.
			725	48		3.4/1.4	48		3.6/1.5	48		3.7/1.5	48		3.8/1.6	47		3.4/1.4
		9000	750	49		3.8/1.6	48		3.3/1.4	48		3.4/1.4	48		3.5/1.5	48		3.7/1.5
			775	49		3.5/1.5	49		3.7/1.5	49		3.8/1.6	48		3.3/1.4	48		3.4/1.4
			800	49		3.3/1.4	49		3.4/1.4	49		3.5/1.5	49		3.7/1.5	49		3.8/1.6
			AVG GAS						SPECIFIC GRAVITY OF NATURAL GAS
	ALTITUDE				0.58			0.60			0.62			0.64			0.66
			HEAT VALUE
		RANGE
			AT ALTITUDE	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
		(FT)				Pressure			Pressure			Pressure			Pressure			Pressure
			(BTU/CU FT)	No.			No.			No.			No.			No.
						High/Low			High/Low			High/Low			High/Low			High/Low
			575	46		3.6/1.5	46		3.7/1.5	46		3.8/1.6	45		3.8/1.6	44		3.2/1.3
			600	47		3.7/1.5	46		3.4/1.4	46		3.5/1.5	46		3.6/1.5	46		3.8/1.6
Only		9001	625	47		3.4/1.4	47		3.6/1.5	47		3.7/1.5	47		3.8/1.6	46		3.5/1.4
			650	48		3.6/1.5	48		3.8/1.6	47		3.4/1.4	47		3.5/1.5	47		3.6/1.5
		to	675	48		3.4/1.4	48		3.5/1.4	48		3.6/1.5	48		3.7/1.5	48		3.8/1.6
U.S.A.
			700	49		3.7/1.5	49		3.8/1.6	48		3.3/1.4	48		3.5/1.4	48		3.6/1.5
		10,000	725	49		3.4/1.4	49		3.5/1.5	49		3.7/1.5	49		3.8/1.6	48		3.3/1.4
			750	50		3.8/1.6	49		3.3/1.4	49		3.4/1.4	49		3.5/1.5	49		3.6/1.5
			775	50		3.5/1.5	50		3.7/1.5	50		3.8/1.6	49		3.3/1.4	49		3.4/1.4

*For 125-20 size only, input is 20,500 Btuh for high fire. Deduct 0.1-in. from manifold pressure shown in table. Change orifice size if manifold pressure falls below 3.2-in. wc.

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