Bryant 581B manual Electrical Data

ELECTRICAL DATA

581B036-072 STANDARD MOTOR (Units Without Electrical Convenience Outlet)

	NOMINAL	VOLTAGE						COMBUSTION	POWER		MINIMUM UNIT
UNIT				COMPRESSOR		OFM	IFM		SUPPLY		DISCONNECT
	VOLTAGE	RANGE						FAN MOTOR
581B									WITH OUTLET			SIZE*
	(V-Ph-Hz)
		Min	Max	RLA	LRA	FLA	FLA	FLA	MCA	MOCP†	FLA		LRA
	208/230-1-60	187	254	16.0	88.0	0.7	4.9	.57	25.6/25.6	35/35	25/25		101/101
036	208/230-3-60	187	254	10.3	77.0	0.7	4.9	.57	18.5/18.5	25/25	18/18		90/ 90
(3 Tons)	460-3-60	414	508	5.1	39.0	0.4	2.2	.30	9.0	15	9		46
	575-3-60	518	632	4.2	31.0	0.4	2.2	.30	7.3	15	7		36
	208/230-1-60	187	254	23.7	129.0	0.7	4.9	.57	35.2/35.2	45/45	34/34		142/142
048	208/230-3-60	187	254	13.5	99.0	0.7	4.9	.57	22.5/22.5	30/30	22/22		112/112
(4 Tons)	460-3-60	414	508	7.4	49.5	0.4	2.2	.30	11.9	15	12		56
	575-3-60	518	632	5.8	40.0	0.4	2.2	.30	9.3	15	9		45
	208/230-1-60	187	254	28.8	169.0	1.5	8.8	.57	46.3/46.3	60/60	45/45		216/216
060	208/230-3-60	187	254	17.3	123.0	1.5	5.8	.57	28.9/28.9	35/35	28/28		168/168
(5 Tons)	460-3-60	414	508	9.0	62.0	0.8	2.6	.30	14.7	20	14		84
	575-3-60	518	632	7.1	50.0	0.8	2.6	.30	11.6	15	11		67
072	208/230-3-60	187	254	20.5	156.0	1.4	5.8	.57	32.8/32.8	40/40	32/32		200/200
	460-3-60	414	508	9.6	70.0	0.6	2.6	.30	15.2	20	15		92
(6 Tons)
	575-3-60	518	632	7.7	56.0	0.6	2.6	.30	12.2	15	13		78

581B036-072 STANDARD MOTOR (Units With Electrical Convenience Outlet)

	NOMINAL	VOLTAGE						COMBUSTION	POWER		MINIMUM UNIT
UNIT				COMPRESSOR		OFM	IFM		SUPPLY		DISCONNECT
		RANGE						FAN MOTOR
581B	VOLTAGE								WITH OUTLET			SIZE*
	(V-Ph-Hz)
		Min	Max	RLA	LRA	FLA	FLA	FLA	MCA	MOCP†	FLA		LRA
	208/230-1-60	187	254	16.0	88.0	0.7	4.9	.57	31.6/31.6	40/40	30/30		106/106
036	208/230-3-60	187	254	10.3	77.0	0.7	4.9	.57	24.5/24.5	30/30	24/24		95/95
(3 Tons)	460-3-60	414	508	5.1	39.0	0.4	2.2	.30	11.7	15	11		48
	575-3-60	518	632	4.2	31.0	0.4	2.2	.30	9.5	15	9		38
	208/230-1-60	187	254	23.7	129.0	0.7	4.9	.57	41.2/41.2	50/50	39/39		147/147
048	208/230-3-60	187	254	13.5	99.0	0.7	4.9	.57	28.5/28.5	35/35	27/27		117/117
(4 Tons)	460-3-60	414	508	7.4	49.5	0.4	2.2	.30	14.6	20	14		58
	575-3-60	518	632	5.8	40.0	0.4	2.2	.30	11.5	15	11		47
	208/230-1-60	187	254	28.8	169.0	1.5	8.8	.57	52.3/52.3	60/60	50/50		221/221
060	208/230-3-60	187	254	17.3	123.0	1.5	5.8	.57	34.9/34.9	40/40	34/34		173/173
(5 Tons)	460-3-60	414	508	9.0	62.0	0.8	2.6	.30	17.4	20	17		86
	575-3-60	518	632	7.1	50.0	0.8	2.6	.30	13.8	20	13		69
072	208/230-3-60	187	254	20.5	156.0	1.4	5.8	.57	38.8/38.8	45/45	37/37		205/205
	460-3-60	414	508	9.6	70.0	0.6	2.6	.30	17.9	20	17		94
(6 Tons)
	575-3-60	518	632	7.7	56.0	0.6	2.6	.30	14.3	20	15		79

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

UL — Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

†Fuse or HACR circuit breaker.

NOTES:

1.In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. UL, Can- ada 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 percent of voltage imbalance.

max voltage deviation from average voltage

= 100 x

average voltage

Example: Supply voltage is 460-3-60.

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

452 + 464 + 455

Average Voltage =

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.

7

% 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%, con- tact your local electric utility company immediately.

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