Carrier 48AJ, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AK, 48EJ specifications 236.3/230.9

Table 7 — Electrical Data — 48AJ,AK,AW,AY Units (cont)

UNIT SIZE	NOMINAL	VOLTAGE RANGE		COMPRESSOR					OFM			IFM	POWER	POWER
				No. 1		No. 2							EXHAUST	SUPPLY
48AJ,AK,	VOLTAGE
AW,AY	(3 PH, 60 Hz)	Min	Max	RLA	LRA	RLA	LRA	Qty		FLA	Hp	FLA	FLA	MCA	MOCP*
													(total)
											20	59.4/54.0	—	236.3/230.9	300/300
													23.6/23.6	259.9/254.5	300/300
	208/230	187	253	69.2	345	69.2	345	4		5.3	25	74.8/68.0	—	253.1/244.9	300/300
										(ea)			23.6/23.6	276.7/268.5	350/300
											30	88/80.0	—	269.6/259.6	350/300
													23.6/23.6	293.2/283.2	350/350
											20	27	—	102.6	125
													12.6	115.2	125
050	460	414	508	28.8	173	28.8	173	4		2.7	25	34	—	110.9	125
										(ea)			12.6	123.5	150
											30	40	—	118.4	150
													12.6	131.0	150
											20	22	—	91.7	110
													12.6	104.3	125
	575	518	632	26.7	120	26.7	120	4		2.4	25	27	—	96.8	110
										(ea)			12.6	109.4	125
											30	32	—	103.0	125
													12.6	115.6	125
											25	74.8/68.0	—	291.3/284.5	350/350
													35.4/35.4	326.7/319.9	400/400
	208/230	187	253	82.1	446	82.1	446	6		5.3	30	88/80.0	—	306.0/296.5	350/350
										(ea)			35.4/35.4	341.4/331.9	400/400
											40	114/104	—	338.5/326.0	450/400
													35.4/35.4	373.9/361.4	450/450
											25	34	—	148.3	175
													18.9	167.2	200
060	460	414	508	43.6	223	43.6	223	6		2.7	30	40	—	154.3	175
										(ea)			18.9	173.2	200
											40	52	—	168.4	200
													18.9	187.3	225
											25	27	—	119.3	150
													18.9	138.2	150
	575	518	632	34.6	164	34.6	164	6		2.4	30	32	—	124.3	150
										(ea)			18.9	143.2	175
											40	41	—	134.9	175
													18.9	153.8	175

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 per NEC.

NOTES:

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

2.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt- age 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.

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