Electrical Data 581A155,180, Fla, Hacr, Rla

ELECTRICAL DATA — 581A (cont)

ELECTRICAL DATA — 581A155,180

UNIT	NOMINAL	VOLTAGE		COMPRESSOR					OFM			IFM	POWER		COMBUSTION	POWER
	VOLTAGE	RANGE		No. 1		No. 2							EXHAUST		FAN MOTOR	SUPPLY
581A
	(3 Ph, 60 Hz)
		Min	Max	RLA	LRA	RLA	LRA	Qty	Hp	FLA (ea)	Hp	FLA	FLA	LRA	FLA	MCA	MOCP*
	208/230	187	253	20.7	156	20.7	156	3	0.5	1.70	2.9	8.8/ 8.4	—	—	0.57	60/60	80/80
155													4.6	18.8	0.57	65/65	80/80

													—	—	0.30	29	35
(Standard	460	414	506	10.0	75	10.0	75	3	0.5	0.80	2.9	4.2
													2.3	6.0	0.30	31	40
IFM)
	575	518	633	8.2	54	8.2	54	3	0.5	0.75	3.0	3.9	—	—	0.57	25	30
													2.1	4.8	0.57	27	30

155	208/230	187	253	20.7	156	20.7	156	3	0.5	1.70	3.7	10.5/11.0	—	—	0.57	62/63	80/80
													4.6	18.8	0.57	67/67	80/80

(Optional
													—	—	0.30	30	35
IFM)	460	414	506	10.0	75	10.0	75	3	0.5	0.80	3.7	4.8
													2.3	6.0	0.30	32	40

	208/230	187	253	32.1	195	20.7	156	3	0.5	1.70	5.0	15.8/15.8	—	—	0.57	82/82	110/110
													4.6	18.8	0.57	86/86	110/110

180	460	414	506	16.4	95	10.0	75	3	0.5	0.80	5.0	7.9	—	—	0.30	41	50
													2.3	6.0	0.30	43	50

	575	518	633	12.0	80	8.2	54	3	0.5	0.75	5.0	6.0	—	—	0.57	31	40
													2.1	4.8	0.57	34	45

		LEGEND
FLA	—	Full Load Amps
HACR —		Heating, Air Conditioning and Refrigeration
IFM	—	Indoor (Evaporator) Fan Motor
LRA	—	Locked Rotor Amps
MCA	—	Minimum Circuit Amps
MOCP —		Maximum Overcurrent Protection
NEC	—	National Electrical Code
OFM	—	Outdoor (Condenser) Fan Motor
RLA	—	Rated Load Amps

*Fuse or HACR circuit breaker.

NOTES:

1.In compliance with NEC requirements for multimotor and combina- tion load equipment (refer to NEC Articles 430 and 440), the over- current protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.

2.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the per- cent of voltage imbalance.

% Voltage Imbalance

Example: Supply voltage is 460-3-60.

AB = 452 v BC = 464 v AC = 455 v

Average Voltage = 452 + 464 + 455 3

= 1371 3

= 457

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v (BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x 457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

	= 100 x	max voltage deviation from average voltage
	= 100 x	average voltage
		average voltage

581A155-300

244

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 Electrical Data 581A155,180, Fla, Hacr, Rla

Models: 581A/B

ELECTRICAL DATA — 581A (cont)

ELECTRICAL DATA — 581A155,180

UNIT

RANGE

RLA

FLA

FLA

HACR —

RLA

Rated Load Amps

2.Unbalanced 3-Phase Supply Voltage

581A155-300

581A/B specifications