581B036-150

PHYSICAL DATA — 581B036-072 (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
	114115	.089...43		.089...43		.089...43		.089...43
Thermostat Heat Anticipator Setting (amps)	149/150	—		.102...38		.102...38		.102...38
Thermostat Heat Anticipator Setting (amps)
208/230/460 v
First Stage		.14		.14		.14		.14
Second Stage		.14		.14		.14		.14
Gas Input (Btuh)
First Stage/Second Stage (3-phase units)	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
	071II	—/ 72,000		—/ 72,000		—/ 72,000		—
	114II	—/115,000		—/115,000		—/115,000		—
	149II	—		—/150,000		—/150,000		—
	060N***	—/ 60,000		—/ 60,000		—/ 60,000		—
	090N***	—/ 90,000		—/ 90,000		—/ 90,000		—
	120N***	—		—/120,000		—/120,000		—
Efficiency (Steady State) (%)	072	82		82		82		82
	115	80		81		81		81
	150	—		80		80		80
	071	82		82		82		—
	114	80		81		81		—
	149	—		80		80		—
	060N	80		80		80		—
	090N	80		80		80		—
	120N	—		80		80		—
Temperature Rise Range	072	25-55		25-55		25-55		25-55
	115	55-85		35-65		35-65		35-65
	150	—		50-80		50-80		50-80
	071	25-55		25-55		25-55		—
	114	55-85		35-65		35-65		—
	149	—		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		—
Manifold Pressure (in. wg)
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		2		2	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.)				Varies By Option Selected
RETURN-AIR FILTERS					Throwaway
Quantity...Size (in.)				2...16 x 25 x 2				4...16 x 16 x 2

LEGEND

Bhp — Brake Horsepower

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

**60,000 and 72,000 Btuh heat input units have 2 burners. 90,000 and 120,000 Btuh heat input units have 3 burners. 115,000 Btuh heat input units and 150,000 Btuh Heat input units have 3 burners.

††An LP kit is available as an accessory. In order to convert a Low NOx unit to LP gas, the baffle must be removed. Low NOx units converted to LP gas are no longer California SCAQMD compliant.

California compliant three-phase models.

***California SCAQMD compliant low NOx models have combustion products that are controlled to 40 nanograms per joule or less.

581A/B specifications

The Bryant 581A/B is a sophisticated rooftop unit designed for commercial heating and cooling applications, striking a balance between performance, efficiency, and versatility. This unit is engineered to cater to various building sizes and configurations, making it an excellent choice for businesses seeking reliable climate control solutions.

One of the standout features of the Bryant 581A/B is its high efficiency. With SEER ratings reaching up to 14.5, this unit can significantly reduce energy costs while providing optimal performance throughout its operational lifespan. The design incorporates advanced compressor technology, allowing for variable speed operation that not only enhances comfort but also promotes energy savings by adjusting to the real-time demands of the environment.

The Bryant 581A/B also integrates cutting-edge refrigerant technology. Utilizing Puron refrigerant, it adheres to current environmental standards, minimizing its impact on ozone depletion while maximizing cooling performance. This commitment to sustainability is complemented by energy-efficient components, including high-efficiency coils and fan motors, which further optimize energy consumption.

In terms of construction, the Bryant 581A/B is built to withstand the rigors of outdoor installation. The unit features a rugged cabinet design with durable, corrosion-resistant materials, ensuring long-term reliability even in challenging weather conditions. Additionally, the easily accessible components simplify maintenance, reducing downtime for businesses.

The functionality of the Bryant 581A/B extends beyond mere cooling and heating. It is equipped with advanced control systems that can be interfaced with building management systems, allowing for seamless integration and enhanced control over indoor climate. This technology provides operators with the ability to monitor and adjust settings remotely, ensuring a comfortable indoor environment while optimizing energy use.

Noise reduction is another important characteristic of the Bryant 581A/B. The unit is designed with sound-dampening features, making it suitable for applications where low noise levels are a priority, such as retail spaces or office buildings.

Overall, the Bryant 581A/B is a robust solution for businesses seeking efficient, reliable, and flexible climate control. Its combination of advanced technology, durable construction, and user-friendly features make it a leading choice in the commercial HVAC market.

Bryant 581A/B manual 581B036-150

Models: 581A/B

581B036-150

PHYSICAL DATA — 581B036-072 (cont)

UNIT SIZE 581B

FURNACE SECTION

RETURN-AIR FILTERS

581A/B specifications