Bryant 549B Nominal Voltage Electric Power Minimum Unit Compressor, Ph-Hz Min Max, Rla Lra Fla

ELECTRICAL DATA (cont)

UNITS WITHOUT ELECTRICAL CONVENIENCE OUTLET (cont)

		NOMINAL	VOLTAGE						ELECTRIC				POWER			MINIMUM UNIT
	UNIT				COMPRESSOR		OFM	IFM								DISCONNECT
		VOLTAGE	RANGE						HEAT*				SUPPLY
	549B																SIZE
		(V-Ph-Hz)
			Min	Max	RLA	LRA	FLA	FLA	kW†	FLA		MCA		MOCP		FLA		LRA
									—/—	—/—		38.2/	38.2	40/	40**	40/	40	242/242
									7.8/10.4	21.7/	25.0	65.3/	69.5	70/	70	65/	69	264/267
		208/230-3-60	187	254	12.4	88.0	1.4	7.5	12.0/16.0	33.3/	38.5	79.8/	86.3	80/	90	79/	85	275/281††
									18.6/24.8	51.6/	59.7	102.7/112.8		110/125		100/109		294/302††
	090***								24.0/32.0	66.6/	77.0	121.5/134.5		125/150		117/129		309/319††
									31.8/42.4	88.3/102.0		148.6/165.7		150/175		142/158		330/344††
	(71/2 Tons)								—	—		19.2		20**		20		121
									13.9	16.7		40.1		45**		39		138
		460-3-60	414	508	6.4	44.0	0.7	3.4	16.5	19.8		44.0		45**		43		141
									27.8	33.4		61.0		70		59		155
									33.0	39.7		68.8		70		66		161
									41.7	50.2		82.0		90		78		171
									—/—	—/—		56.8/	56.8	60/	60**	60/	60	337/337
									7.8/10.4	21.7/	25.0	84.0/	88.1	90/	90	85/	89	358/362††
		208/230-3-60	187	254	19.3	123.0	1.4	10.6	12.0/16.0	33.3/	38.5	98.5/105.0		100/110		98/104		370/375††
549B036-120									24.0/32.0	66.6/	77.0	140.1/153.1		150/175		136/148		403/414††
	120***								31.8/42.4	88.3/102.0		167.2/184.3		175/200		161/177		425/439††
									37.6/50.0	104.4/120.3		187.3/177.1		200/200		180/198		441/457††
	(10 Tons)
									—	—		28.7		30		30		170
									50.0	60.1		88.8		100		99		230††
									16.5	19.8		53.3		60		53		189
		460-3-60	414	508	10.0	62.0	0.7	4.8	27.8	33.4		70.5		80		69		203
									33.0	39.7		78.3		80		76		209
									41.7	50.2		91.5		100		88		220††

LEGEND AND NOTES FOR ELECTRICAL DATA TABLES

LEGEND

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration IFM — Indoor Fan Motor

LRA — Locked Rotor Amps MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection NEC — National Electrical Code

OFM — Outdoor Fan Motor

RLA — Rated Load Amps

*Used to determine minimum disconnect per NEC.

†Heater capacity (kW) is based on heater voltage of 208 v and 480 v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly.

**Fuse or HACR circuit breaker.

††Optional disconnect switch cannot be used.

***Units have 2 outdoor fan motors.

NOTES:

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

% Voltage Imbalance

= 100 x	max voltage deviation from average voltage
	average voltage

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.

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.

92