Bryant 581A/B manual 150, Med

PHYSICAL DATA — 581B090-150 (cont)

	UNIT SIZE 581B			090	102		120	150
	FURNACE SECTION
	Rollout Switch Cutout Temp (F)†			195	195		195	195
	Burner Orifice Diameter (in. ...drill size)**		Lo
	Natural Gas — Std			.120...31	.120...31		.120...31	.120...31
			Med	.120...31	.120...31		.120...31	.129...30
			Hi	.120...31	.120...31		.129...30
	Liquid Propane — Alt††		Lo	.096...41	.096...41		.096...41	.096...41
			Med	.096...41	.096...41		.096...41	.102...38
			Hi	.096...41	.096...41		.102...38
	Thermostat Heat Anticipator Setting (amps)
		Stage 1		.14	.14		.14	.14
				.14	.14		.14	.14
		Stage 2		.14	.14		.14
				.14	.14		.20	.20
				.20	.20		.20	.20
	Gas Input (Btuh)	Stage 1	Lo	.20	.20		.20
				90,000	90,000		120,000	120,000
150			Med	120,000	120,000		180,000	180,000
			Hi	180,000	180,000		200,000
		Stage 2	Lo	125,000	125,000		180,000	180,000
581B036-	Temperature Rise Range		Med	180,000	180,000		224,000	224,000
			Lo	20-50	20-50		35-65	35-65
	Efficiency (Steady State) (%)		Hi	224,000	224,000		250,000
				82	82		82	82
				82	82		82	80
				82	82		80
			Med	35-65	35-65		35-65	40-70
	Manifold Pressure (in. wg)		Hi	45-75	45-75		40-70
	Natural Gas — Std			3.5	3.5		3.5	3.5
	Liquid Propane — Alt††		Lo	3.5	3.5		3.5	3.5
	Field Gas Connection Size (in.)			.50	.50		.75	.75
			Med	.75	.75		.75	.75
			Hi	.75	.75		.75
	HIGH-PRESSURE SWITCH (psig)
	Standard Compressor Internal Relief					450 ± 50
	Cutout					428
	Reset (Auto.)					320
	LOSS-OF-CHARGE SWITCH/LOW-PRESSURE
	SWITCH (Liquid LIne) (psig)
	Cutout					7 ± 3
	Reset (Auto.)					22 ± 7
	FREEZE PROTECTION THERMOSTAT
	Opens (F)					30 ± 5
	Closes (F)					45 ± 5
	OUTDOOR-AIR INLET SCREENS					Cleanable
	Quantity...Size (in.)				1...20 x 25 x 1
					1...16 x 25 x 1
	RETURN-AIR FILTERS					Throwaway
	Quantity...Size (in.)			4...16 x 20 x 2	4...20 x 20 x 2		4...20 x 20 x 2	4...20 x 20 x 2

LEGEND

Bhp — Brake Horsepower

*Single phase/three phase. †Indicates automatic reset.

**180,000 Btuh heat input units have 2 burners.

224,000 Btuh heat input units and 250,000 Btuh Heat input units have 3 burners.

††An LP kit is available as an accessory.

86