Bryant 581B manual Physical Data, 060N†††, 090N†††, 120N†††

PHYSICAL DATA (cont)

UNIT SIZE 581B			036			048				060		072
FURNACE SECTION
Rollout Switch Cutout Temp (F)†			195			195				195		195
Burner Orifice Diameter (in. ...drill size)**
Natural Gas — Std	071/072	.113...33			.113...33				.113...33			.113...33
	114/115	.113...33			.113...33				.113...33			.113...33
	149/150		—		.129...30				.129...30			.129...30
	060N	.102...38			.102...38				.102...38			—
	090N	.102...38			.102...38				.102...38			—
	120N		—		.116...32				.116...32			—
Liquid Propane — Alt††	071/072	.089...43			.089...43				.089...43			.089...43
	114/115	.089...43			.089...43				.089...43			.089...43
	149/150		—		.102...38				.102...38			.102...38
	060N	.082...45			.082...45				.082...45			—
	090N	.082...45			.082...45				.082...45			—
Thermostat Heat Anticipator Setting (amps)	120N		—		.094...42				.094...42			—
			.14			.14				.14		.14
(208/230/460/575 V)
Gas Input (Btuh)
First Stage/Second Stage	071II	—/	72,000		—/	72,000			—/	72,000		—
	114II	—/115,000			—/115,000				—/115,000			—
	149II		—		—/150,000				—/150,000			—
	072***	50,000/		72,000	50,000/		72,000		50,000/		72,000	50,000/	72,000
	115***	82,000/115,000			82,000/115,000				82,000/115,000			82,000/115,000
	150***		—		120,000/150,000				120,000/150,000			120,000/150,000
	060N†††	—/	60,000		—/	60,000			—/	60,000		—
	090N†††	—/	90,000		—/	90,000			—/	90,000		—
	120N†††		—		—/120,000				—/120,000			—
Efficiency (Thermal) (%)	071		82			82				82		—
	114		80			81				81		—
	149		—			80				80		—
	072		82			82				82		82
	115		80			81				81		81
	150		—			80				80		80
	060N		81			81				81		—
	090N		81			81				81		—
	120N		—			82				82		—
Temperature Rise Range	071	15-45			15-45				15-45			—
	114	55-85			35-65				35-65			—
	149		—		50-80				50-80			—
	072	15-45			15-45				15-45			15-45
	115	55-85			35-65				35-65			35-65
	150		—		50-80				50-80			50-80
	060N	20-50			20-50				20-50			—
	090N	30-60			30-60				30-60			—
Manifold Pressure (in. wg)	120N		—		40-70				40-70			—
Natural Gas — Std			3.5			3.5				3.5		3.5
Liquid Propane — Alt††			3.5			3.5				3.5		3.5
Maximum Static Pressure (in. wg)			1.0			1.0				1.0		1.0
Field Gas Connection Size (in.)			1/2			1/2				1/2		1/2
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 ± 5
FREEZE PROTECTION THERMOSTAT
Opens (F)								30 ± 5
Closes (F)								45 ± 5
OUTDOOR-AIR INLET SCREENS							Cleanable
Quantity...Size (in.)							1...20 x 24 x 1
RETURN-AIR FILTERS							Throwaway
Quantity...Size (in.)							2...16 x 25 x 2

LEGEND

Bhp — Brake Horsepower

*Single phase/three phase.

†Indicates automatic reset.

**581B 072 unit size 036-072 (72,000 Btu heat input) have 2 burners. 581B 115 unit size 036-072 (115,000 Btu heat input) have 3 burners. 581B 150 unit size 048-072 (150,000 Btu heat input) have 3 burners.

††An LP kit is available as an accessory. llCalifornia compliant three-phase models.

***Three-phase standard models have heating inputs as shown. Single- phase standard models have one-stage heating with heating input values as follows:

581BJV036-060072, 72,000 Btuh

581BJV036-060115, 115,000 Btuh

581BJV048-060150, 150,000 Btuh

†††California SCAQMD compliant Low NOx models have combustion prod- ucts that are controlled to 40 nanograms per joule or less.

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