Bryant 120 Service And Maintenance, Procedures, Sea level, Electrical Shock, Fire Or Explosion

Table 16 - Orifice Size and Manifold Pressure for Gas Input Rate (cont.)

(Tabulated Data Based on 21,000 Btuh High-Heat/14,500 Btuh for Low-Heat Per Burner, Derated 4% for Each 1000 Ft Above

Sea level)

			AVG. GAS				SPECIFIC GRAVITY OF NATURAL GAS
ALTITUDE RANGE			HEAT VALUE		0.58			0.60			0.62			0.64
	(FT)		AT ALTITUDE
				Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
			(BTUH/CU FT)	No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure
			675	44		3.5/1.7	43		3.2/1.5	43		3.3/1.6	43		3.4/1.6
			700	44		3.3/1.6	44		3.4/1.6	44		3.5/1.7	43		3.2/1.5
			725	45		3.7/1.8	45		3.8/1.8	44		3.3/1.6	44		3.4/1.6
U.S.A.		6001 to	750	46		3.6/1.7	46		3.8/1.8	45		3.7/1.8	45		3.8/1.8
Only		7000	775	46		3.4/1.6	46		3.5/1.7	46		3.6/1.7	46		3.8/1.8
			800	47		3.6/1.7	47		3.8/1.8	46		3.4/1.6	46		3.5/1.7
			825	47		3.4/1.6	47		3.5/1.7	47		3.6/1.7	47		3.8/1.8
			850	48		3.7/1.7	48		3.8/1.8	47		3.4/1.6	47		3.5/1.7
			AVG. GAS				SPECIFIC GRAVITY OF NATURAL GAS
ALTITUDE RANGE					0.58			0.60			0.62			0.64
			HEAT VALUE
	(FT)
			AT ALTITUDE )	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
				No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure
			650	44		3.3/1.6	44		3.4/1.6	44		3.5/1.7	43		3.2/1.5
			675	45		3.7/1.8	45		3.8/1.8	44		3.3/1.6	44		3.4/1.6
			700	46		3.6/1.7	46		3.7/1.8	46		3.8/1.8	45		3.8/1.8
U.S.A.		7001 to	725	47		3.8/1.8	46		3.5/1.7	46		3.6/1.7	46		3.7/1.8
Only		8000	750	47		3.5/1.7	47		3.7/1.8	47		3.8/1.8	46		3.5/1.6
			775	48		3.8/1.8	47		3.4/1.6	47		3.6/1.7	47		3.7/1.7
			800	48		3.6/1.7	48		3.7/1.8	48		3.8/1.8	47		3.4/1.6
			825	48		3.3/1.6	48		3.5/1.6	48		3.6/1.7	48		3.7/1.8
							SPECIFIC GRAVITY OF NATURAL GAS
ALTITUDE RANGE					0.58			0.60			0.62			0.64
	(FT)			Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
				No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure
			625	45		3.7/1.8	45		3.8/1.8	44		3.3/1.6	44		3.4/1.6
			650	46		3.6/1.7	46		3.7/1.8	46		3.8/1.8	45		3.8/1.8
U.S.A.		8001 to	675	47		3.8/1.8	46		3.4/1.6	46		3.5/1.7	46		3.7/1.7
			700	47		3.5/1.7	47		3.6/1.7	47		3.7/1.8	46		3.4/1.6
Only		9000
			725	48		3.7/1.8	48		3.8/1.8	47		3.5/1.7	47		3.6/1.7
			750	48		3.5/1.7	48		3.6/1.7	48		3.7/1.8	48		3.8/1.8
			775	49		3.8/1.8	48		3.4/1.6	48		3.5/1.7	48		3.6/1.7
ALTITUDE RANGE			AVG GAS				SPECIFIC GRAVITY OF NATURAL GAS
			HEAT VALUE		0.58			0.60			0.62			0.64
	(FT)		AT ALTITUDE	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold	Orifice		Manifold
			(BTU/CU FT)	No.		Pressure	No.		Pressure	No.		Pressure	No.		Pressure
			600	46	3.6/1.7		46	3.7/1.8		46	3.8/1.8		45	3.7/1.8
			625	47	3.7/1.8		47	3.8/1.8		46	3.5/1.7		46	3.6/1.7
U.S.A.		9001 to	650	47	3.4/1.6		47	3.6/1.7		47	3.7/1.8		47	3.8/1.8
Only	10,000		675	48	3.6/1.7		48	3.8/1.8		47	3.4/1.6		47	3.5/1.7
			700	48	3.4/1.6		48	3.5/1.7		48	3.6/1.7		48	3.7/1.8
			725	49	3.7/1.8		49	3.8/1.8		48	3.4/1.6		48	3.5/1.7

* Orifice numbers 43 are factory installed
SERVICE AND MAINTENANCE
		!	WARNING
	PROCEDURES
		ELECTRICAL SHOCK, FIRE OR EXPLOSION
!	WARNING
		HAZARD
		Failure to follow this warning could result in personal injury
FIRE, PERSONAL INJURY AND UNIT DAMAGE
		or death, or property damage.
HAZARD
		Before servicing, disconnect all electrical power to furnace.
Failure to follow this warning could result in personal injury,
		Verify proper operation after servicing.
death and/or property damage.

The ability to properly perform maintenance on this equipment requires certain knowledge, mechanical skills, tools, and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment other than those procedures recommended in the User’s Manual.

312A

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