Carrier 58TMA operating instructions DERATED 4% FOR EACH 1000 FT ABOVE SEA LEVEL

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
			725	44		3.8/1.6	43		3.4/1.4	43		3.5/1.4	43		3.6/1.5	43		3.7/1.5
			750	44		3.5/1.5	44		3.6/1.5	44		3.8/1.6	43		3.4/1.4	43		3.5/1.4
Only			775	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
		4001	800	45		3.7/1.5	44		3.2/1.3	44		3.3/1.4	44		3.4/1.4	44		3.5/1.5
			825	46		3.7/1.5	46		3.8/1.6	45		3.8/1.6	44		3.2/1.3	44		3.3/1.4
U.S.A.
		to	850	46		3.5/1.4	46		3.6/1.5	46		3.7/1.5	46		3.8/1.6	45		3.8/1.6
			875	47		3.7/1.5	46		3.4/1.4	46		3.5/1.5	46		3.6/1.5	46		3.7/1.5
		5000	900	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
			925	48		3.8/1.6	47		3.4/1.4	47		3.6/1.5	47		3.7/1.5	47		3.8/1.6
			950	48		3.6/1.5	48		3.7/1.5	48		3.8/1.6	47		3.5/1.4	47		3.6/1.5
			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
			700	44		3.5/1.5	44		3.6/1.5	44		3.8/1.6	43		3.4/1.4	43		3.5/1.4
			725	44		3.3/1.4	44		3.4/1.4	44		3.5/1.4	44		3.6/1.5	44		3.7/1.5
			750	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
			775	46		3.6/1.5	46		3.8/1.6	45		3.7/1.5	44		3.2/1.3	44		3.3/1.4
Only		5001	800	46		3.4/1.4	46		3.5/1.5	46		3.7/1.5	46		3.8/1.6	45		3.7/1.5
			825	47		3.7/1.5	47		3.8/1.6	46		3.4/1.4	46		3.6/1.5	46		3.7/1.5
		to	850	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
U.S.A.
			875	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
		6000	900	48		3.5/1.4	48		3.6/1.5	48		3.7/1.5	47		3.4/1.4	47		3.5/1.4
			925	48		3.3/1.4	48		3.4/1.4	48		3.5/1.5	48		3.6/1.5	48		3.8/1.6
			950	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
			975	49		3.5/1.4	49		3.6/1.5	49		3.7/1.5	48		3.3/1.4	48		3.4/1.4
			1000	49		3.3/1.4	49		3.4/1.4	49		3.6/1.5	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
			650	44		3.5/1.5	44		3.7/1.5	44		3.8/1.6	43		3.4/1.4	43		3.5/1.4
			675	44		3.3/1.4	44		3.4/1.4	44		3.5/1.4	44		3.6/1.5	44		3.7/1.5
Only			700	45		3.7/1.5	44		3.2/1.3	44		3.3/1.3	44		3.4/1.4	44		3.5/1.4
		6001	725	46		3.6/1.5	46		3.7/1.5	45		3.7/1.5	45		3.8/1.6	44		3.2/1.3
			750	47		3.8/1.6	46		3.5/1.4	46		3.6/1.5	46		3.7/1.5	46		3.8/1.6
U.S.A.
		to	775	47		3.6/1.5	47		3.7/1.5	47		3.8/1.6	46		3.5/1.4	46		3.6/1.5
			800	48		3.8/1.6	47		3.5/1.4	47		3.6/1.5	47		3.7/1.5	47		3.8/1.6
		7000	825	48		3.6/1.5	48		3.7/1.5	48		3.8/1.6	47		3.5/1.4	47		3.6/1.5
			850	48		3.4/1.4	48		3.5/1.4	48		3.6/1.5	48		3.7/1.5	47		3.4/1.4
			875	49		3.8/1.6	48		3.3/1.4	48		3.4/1.4	48		3.5/1.5	48		3.6/1.5

*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.

19