Carrier EY024-048, 48EJ, EW, EK installation instructions Fla Lra, Hacr, Nec, Rla

Table 4 Ð Electrical Data (cont)

UNIT	NOMINAL	VOLTAGE		COMPRESSOR					OFM			IFM		POWER		COMBUSTION	POWER SUPPLY
		RANGE		No. 1		No. 2								EXHAUST		FAN MOTOR
SIZE	VOLTAGE
48E	(3 Ph 60 Hz)	Min	Max	RLA	LRA	RLA	LRA	Qty	Hp	FLA	Hp		FLA	FLA	LRA	FLA	MCA	MOCP*
										(ea)
											10		30.8/	Ð	Ð	0.96	169.9/167.1	225/200
													28.0	23.6	41.6	0.96	193.5/190.7	250/225
	208/230	187	254	57.1	266	57.1	266	2	1	5.3	15		46.2/	Ð	Ð	0.96	185.3/181.1	225/225
													42.0	23.6	41.6	0.96	208.9/204.7	250/250
											20		59.4/	Ð	Ð	0.96	198.5/193.1	250/250
													54.0	23.6	41.6	0.96	222.1/216.7	275/250
											10		14.0	Ð	Ð	0.50	77.0	100
														12.6	23.6	0.50	89.6	110
034	460	414	508	25.6	120	25.6	120	2	1	2.7	15		21.0	Ð	Ð	0.50	84.0	100
														12.6	23.6	0.50	96.6	110
											20		27.0	Ð	Ð	0.50	90.0	110
														12.6	23.6	0.50	102.6	125
											10		11.0	Ð	Ð	0.50	61.9	80
														12.6	23.6	0.50	74.5	90
	575	518	632	20.5	96	20.5	96	2	1	2.4	15		17.0	Ð	Ð	0.50	67.9	80
														12.6	23.6	0.50	80.5	100
											20		22.0	Ð	Ð	0.50	72.9	90
														12.6	23.6	0.50	85.5	100
											10		30.8/	Ð	Ð	0.96	180.5/177.7	225/225
													28.0	23.6	41.6	0.96	204.1/201.3	250/250
	208/230	187	254	57.1	266	57.1	266	4	1	5.3	15		46.2/	Ð	Ð	0.96	195.9/191.7	250/225
													42.0	23.6	41.6	0.96	219.5/215.3	275/250
											20		59.4/	Ð	Ð	0.96	209.1/203.7	250/250
													54.0	23.6	41.6	0.96	232.7/227.3	275/275
											10		14.0	Ð	Ð	0.50	82.4	100
														12.6	23.6	0.50	95.0	110
038	460	414	508	25.6	120	25.6	120	4	1	2.7	15		21.0	Ð	Ð	0.50	89.4	110
														12.6	23.6	0.50	102.0	125
											20		27.0	Ð	Ð	0.50	95.4	110
														12.6	23.6	0.50	108.0	125
											10		11.0	Ð	Ð	0.50	66.7	80
														12.6	23.6	0.50	79.3	90
	575	518	632	20.5	96	20.5	96	4	1	2.4	15		17.0	Ð	Ð	0.50	72.7	90
														12.6	23.6	0.50	85.3	100
											20		22.0	Ð	Ð	0.50	77.7	90
														12.6	23.6	0.50	90.3	110

	LEGEND
FLA	Ð Full Load Amps
HACR	Ð Heating, Air Conditioning and
	Refrigeration
IFM	Ð Indoor (Evaporator) Fan Motor
LRA	Ð Locked Rotor Amps
MCA	Ð Minimum Circuit Amps
MOCP Ð Maximum Overcurrent Protection		or
NEC	Ð National Electrical Code
OFM	Ð Outdoor (Condenser) Fan Motor
RLA	Ð Rated Load Amps

*Fuse or HACR circuit breaker.

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

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 − 45 2 = 5 v

(BC) 464 − 45 7 = 7 v

(AC) 457 − 45 5 = 2 v Maximum deviation is 7 v.

Determine percent voltage imbalance.

breaker. Canadian units may be fuse or circuit breaker.

% Voltage Imbalance = 100 x

7

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 voltage imbalance.

% Voltage Imbalance

= 100 x	max voltage deviation from average voltage
	average voltage

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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