Carrier 48EJ, EW, EK, EY024-048 installation instructions Ð Electrical Data cont, Unit

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)
											15		46.2/	Ð	Ð	0.96	223.1/218.9	275/275
													42.0	23.6	41.6	0.96	246.7/242.5	300/300
	208/230	187	254	69.2	345	69.2	345	4	1	5.3	20		59.4/	Ð	Ð	0.96	236.3/230.9	300/300
													54.0	23.6	41.6	0.96	259.9/254.5	300/300
											25		74.8/	Ð	Ð	0.96	251.7/244.9	300/300
													68.0	23.6	41.6	0.96	275.3/268.5	300/300
											15		21.0	Ð	Ð	0.50	96.6	125
														12.6	23.6	0.50	109.2	125
044	460	414	508	28.8	173	28.8	173	4	1	2.7	20		27.0	Ð	Ð	0.50	102.6	125
														12.6	23.6	0.50	115.2	125
											25		34.0	Ð	Ð	0.50	109.6	125
														12.6	23.6	0.50	122.2	150
											15		17.0	Ð	Ð	0.50	86.7	110
														12.6	23.6	0.50	99.3	125
	575	518	632	26.7	120	26.7	120	4	1	2.4	20		22.0	Ð	Ð	0.50	91.7	110
														12.6	23.6	0.50	104.3	125
											25		27.0	Ð	Ð	0.50	96.7	110
														12.6	23.6	0.50	109.3	125
											20		59.4/	Ð	Ð	0.96	252.4/247.0	300/300
													54.0	23.6	41.6	0.96	276.0/270.6	300/300
	208/230	187	254	82.1	446	69.2	345	4	1	5.3	25		74.8/	Ð	Ð	0.96	267.8/261.0	300/300
													68.0	23.6	41.6	0.96	291.4/284.6	300/300
											30		88.0/	Ð	Ð	0.96	281.0/273.0	300/300
													80.0	23.6	41.6	0.96	304.6/296.6	350/300
											20		27.0	Ð	Ð	0.50	119.5	150
														12.6	23.6	0.50	132.1	150
048	460	414	508	42.3	223	28.8	173	4	1	2.7	25		34.0	Ð	Ð	0.50	126.5	150
														12.6	23.6	0.50	139.1	175
											30		40.0	Ð	Ð	0.50	132.5	150
														12.6	23.6	0.50	145.1	175
											20		22.0	Ð	Ð	0.50	101.6	125
														12.6	23.6	0.50	114.2	125
	575	518	632	34.6	164	26.7	120	4	1	2.4	25		27.0	Ð	Ð	0.50	106.6	125
														12.6	23.6	0.50	119.2	150
											30		32.0	Ð	Ð	0.50	111.6	125
														12.6	23.6	0.50	124.2	150

LEGEND

EXAMPLE: Supply voltage is 460-3-60.

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

AB = 452 v

BC = 464 v

AC = 455 v

Average Voltage =

452 + 464 + 455

3

NEC	Ð	National Electrical Code	or
OFM	Ð	Outdoor (Condenser) Fan Motor

=

1371

3

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

= 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

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

= 100 x

max voltage deviation from average voltage

average voltage

2%, contact your local electric utility company immediately.

20