Carrier 48AK, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AJ, 48EJ specifications 30.8/28.0

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)
										10	30.8/28.0	—	180.5/177.7	225/225
												23.6/23.6	204.1/201.3	250/250
	208/230	187	253	57.1	266	57.1	266	4	5.3	15	46.2/42.0	—	195.9/191.7	250/225
									(ea)			23.6/23.6	219.5/215.3	250/250
										20	59.4/54.0	—	209.7/203.7	250/250
												23.6/23.6	233.3/227.3	250/250
										10	14	—	82.4	100
												12.6	95.0	110
035	460	414	508	25.6	120	25.6	120	4	2.7	15	21	—	89.4	110
									(ea)			12.6	102.0	125
										20	27	—	95.8	110
												12.6	108.4	125
										10	11	—	66.7	80
												12.6	79.3	90
	575	518	632	20.5	96	20.5	96	4	2.4	15	17	—	72.7	90
									(ea)			12.6	85.3	100
										20	22	—	78.1	100
												12.6	90.7	110
										15	46.2/42.0	—	211.0/206.8	250/250
												23.6/23.6	234.6/230.4	300/250
	208/230	187	253	57.1	266	69.2	345	4	5.3	20	59.4/54.0	—	224.2/218.8	250/250
									(ea)			23.6/23.6	247.8/242.4	300/300
										25	74.8/68.0	—	241.0/232.8	300/300
												23.6/23.6	264.6/256.4	300/300
										15	21	—	93.4	110
												12.6	106.0	125
040	460	414	508	25.6	120	28.8	173	4	2.7	20	27	—	99.4	125
									(ea)			12.6	112.0	125
										25	34	—	107.7	125
												12.6	120.3	150
										15	17	—	80.5	100
												12.6	93.1	110
	575	518	632	20.5	96	26.7	120	4	2.4	20	22	—	85.5	110
									(ea)			12.6	98.1	110
										25	27	—	90.6	110
												12.6	103.2	125

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.

37