Bryant 581B RLA LRA FLA MCA Mocp, FAN Motor Disconnect SIZE†, With Outlet, Nec, Rla

Table 2A — Electrical Data — Standard Motor Units Without Electrical Convenience Outlet

UNIT		NOMINAL VOLTAGE	VOLTAGE		COMPRESSOR			OFM	IFM	COMBUSTION	POWER		MINIMUM UNIT
			RANGE			(each)		(each)		FAN MOTOR	SUPPLY*		DISCONNECT SIZE†
581B		(V-Ph-Hz)
			Min	Max	Qty	RLA	LRA	FLA	FLA	FLA	MCA	MOCP**	FLA	LRA
	208/230-1-60		187	254		16.0	88.0	0.7	4.9	.60	25.6/25.6	30/30	25/25	101/101
036	208/230-3-60		187	254	1	10.3	77.0	0.7	4.9	.60	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	20	9	46
	575-3-60		518	632		4.2	31.0	0.4	2.2	.30	7.3	20	7	37
048		208/230-1-60	187	254		23.7	126.0	0.7	4.9	.60	35.2/35.2	45/45	34/34	139/139
	208/230-3-60		187	254	1	13.5	93.0	0.7	4.9	.60	22.5/22.5	30/30	22/22	106/106
(4 Tons)	460-3-60		414	508		6.4	46.5	0.4	2.2	.30	10.6	20	10	54
	575-3-60		518	632		6.4	40.0	0.4	2.2	.30	10.1	20	10	46
060		208/230-1-60	187	254		28.8	169.0	1.5	8.8	.60	46.3/46.3	60/60	45/45	216/216
	208/230-3-60		187	254	1	17.3	123.0	1.5	5.8	.60	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	20	12	68
072		208/230-3-60	187	254		20.5	156.0	1.4	5.8	.60	32.8/32.8	40/40	32/32	200/200
	460-3-60		414	508	1	9.6	75.0	0.6	2.6	.30	15.2	20	15	97
(6 Tons)
	575-3-60		518	632		7.7	56.0	0.6	2.6	.30	12.2	20	12	74

Table 2B — Electrical Data — Standard Motor Units With Electrical Convenience Outlet

		VOLTAGE		COMPRESSOR			OFM		COMBUSTION	POWER		MINIMUM UNIT
UNIT	NOMINAL VOLTAGE							IFM		SUPPLY
		RANGE			(each)		(each)		FAN MOTOR			DISCONNECT SIZE†
581B	(V-Ph-Hz)									WITH OUTLET*
		Min	Max	Qty	RLA	LRA	FLA	FLA	FLA	MCA	MOCP**	FLA	LRA
	208/230-1-60	187	254		16.0	88.0	0.7	4.9	.60	31.6/31.6	35/35	30/30	106/106
036	208/230-3-60	187	254	1	10.3	77.0	0.7	4.9	.60	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	20	11	48
	575-3-60	518	632		4.2	31.0	0.4	2.2	.30	9.5	20	9	38
	208/230-1-60	187	254		23.7	126.0	0.7	4.9	.60	41.2/41.2	50/50	39/39	144/144
048	208/230-3-60	187	254	1	13.5	93.0	0.7	4.9	.60	28.5/28.5	35/35	27/27	111/111
(4 Tons)	460-3-60	414	508		6.4	46.5	0.4	2.2	.30	13.3	20	13	56
	575-3-60	518	632		6.4	40.0	0.4	2.2	.30	12.2	20	12	47
	208/230-1-60	187	254		28.8	169.0	1.5	8.8	.60	52.3/52.3	60/60	50/50	221/221
060	208/230-3-60	187	254	1	17.3	123.0	1.5	5.8	.60	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	87
	575-3-60	518	632		7.1	50.0	0.8	2.6	.30	13.8	20	13	70
072	208/230-3-60	187	254		20.5	156.0	1.4	5.8	.60	38.8/38.8	45/45	37/37	205/205
	460-3-60	414	508	1	9.6	75.0	0.6	2.6	.30	17.9	20	17	99
(6 Tons)
	575-3-60	518	632		7.7	56.0	0.6	2.6	.30	14.3	20	14	75

	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

*The values listed in this table do not include power exhaust. See table at right for power exhaust requirements.

†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. The UL, Canada units may be fuse or circuit breaker.

2.Electrical data based on 95 F ambient outdoor-air temperature ± 10% voltage.

3.Unbalanced 3-Phase Supply Voltage

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

% 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%, contact your local electric utility company immediately.

POWER EXHAUST ELECTRICAL DATA

POWER EXHAUST	MCA	MCA	MCA	MOCP
				(for separate
PART NO.	(230 v)	(460 v)	(575 v)
				power source)
CRPWREXH021A01	N/A	0.9	N/A	15
CRPWREXH022A01	3.3	N/A	1.32	15
CRPWREXH023A01	N/A	1.8	N/A	15
CRPWREXH028A01	1.7	N/A	0.68	15
CRPWREXH029A01	N/A	1.0	N/A	15
CRPWREXH030A01	1.6	N/A	0.64	15

N/A — Not available

NOTE: If a single power source is to be used, size wire to include power exhaust MCA and MOCP.

Check MCA and MOCP when power exhaust is powered through the unit. Deter- mine the new MCA including the power exhaust using the following formula:

MCA New = MCA unit only + MCA of Power Exhaust

For example, using a 581B072 unit with MCA = 32.8 and MOCP = 40, with CRPWREXH030A01 power exhaust.

MCA New = 32.8 amps + 1.6 amps = 34.4 amps

If the new MCA does not exceed the published MOCP, then MOCP would not change. The MOCP in this example is 40 amps and the MCA New is below 40; therefore the MOCP is acceptable. If “MCA New” is larger than the published MOCP, raise the MOCP to the next larger size. For separate power, the MOCP for the power exhaust will be 15 amps per NEC.

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