Carrier 50HG014-028 Electrical Data Units Without Optional Convenience Outlet, FLA MCA Mocp

Table 2A — Electrical Data (Units Without Optional Convenience Outlet)

UNIT	NOMINAL	VOLTAGE				COMPRESSOR						OFM		ELECTRIC				IFM			POWER			POWER				DISCONNECT
SIZE	VOLTAGE	RANGE		No. 1			No. 2		No. 3					HEAT						EXHAUST				SUPPLY				SIZE
50HG	(3 Ph, 60 Hz)	Min	Max	RLA	LRA		RLA	LRA	RLA	LRA	Qty	Hp	FLA	kW	FLA		Hp	FLA		Qty		Hp	FLA	MCA		MOCP*		FLA
													(ea)										(ea)
																	3.7	10.6/	9.6	—		—	—	60/ 59		70/ 70		70/ 70
														—	—					2		1.0	5.9	72/	71	90/	80	80/	80
																	5.0	16.7/15.2		—		—	—	66/ 64		80/ 80		80/ 70
																				2		1.0	5.9	78/	76	90/	90	90/	90
																	3.7	10.6/	9.6	—		—	—	60/ 60		70/ 70		70/ 70
														12/16	33/	38				2		1.0	5.9	72/	74	90/	80	80/	80
																	5.0	16.7/15.2		—		—	—	66/ 67		80/ 80		80/ 70
	208/230	187	253	19.2	146.0		19.2	146.0	—	—	4.0	1/4	1.5							2		1.0	5.9	78/	81	90/	90	90/	90
																	3.7	10.6 /9.6		—		—	—	78/ 87		80/ 90		80/ 90
														19/25	52/	60				2		1.0	5.9	93/102		100/110		90/100
																	5.0	16.7/15.2		—		—	—	86/ 94		90/100		80/ 90
																				2		1.0	5.9	101/109		110/110		100/110
																	3.7	10.6/	9.6	—		—	—	143/132		150/150		150/150
														38/50	104/120					2		1.0	5.9	158/147		175/150		150/175
																	5.0	16.7/15.2		—		—	—	151/139		175/150		150/175
																				2		1.0	5.9	166/154		175/175		175/175
																	3.7	4.8		—		—	—	29		35		35
														—	—					2		1.0	3.1	35		40		40
																	5.0	7.6		—		—	—	32		40		35
																				2		1.0	3.1	38		45		45
																	3.7	4.8		—		—	—	29		35		35
														15	18					2		1.0	3.1	36		40		40
																	5.0	7.6		—		—	—	32		40		35
014	460	414	506	9.5	73.0		9.5	73.0	—	—	4.0	1/4	0.7							2		1.0	3.1	40		45		45
																	3.7	4.8		—		—	—	44		45		45
														25	30					2		1.0	3.1	51		60		50
																	5.0	7.6		—		—	—	47		50		45
																				2		1.0	3.1	55		60		60
																	3.7	4.8		—		—	—	66		80		80
														50	60					2		1.0	3.1	74		80		90
																	5.0	7.6		—		—	—	70		80		80
																				2		1.0	3.1	77		80		90
																	3.0	3.9		—		—	—	24		30		30
														—	—					2		1.0	3.1	30		35		35
																	5.0	6.1		—		—	—	26		30		30
																				2		1.0	3.1	32		35		35
																	3.0	3.9		—		—	—	24		30		30
														16	15					2		1.0	3.1	31		35		35
																	5.0	6.1		—		—	—	26		30		30
	575	518	633	7.6	58.4		7.6	58.4	—	—	4.0	1/4	0.7							2		1.0	3.1	34		35		35
																	3.0	3.9		—		—	—	35		35		35
														25	24					2		1.0	3.1	43		45		40
																	5.0	6.1		—		—	—	38		40		35
																				2		1.0	3.1	45		50		45
																	3.0	3.9		—		—	—	62		70		60
														48	46					2		1.0	3.1	70		80		70
																	5.0	6.1		—		—	—	65		70		60
																				2		1.0	3.1	73		80		70

LEGEND AND NOTES FOR TABLES 2A AND 2B

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

*Fuse or HACR circuit breaker.

†208/230 v 75-kW Electric Heat units must use dual-point wiring. The main table lists the branch circuit values for the refrigeration part of the system. The following two tables list the branch circuit values for the electric heat and values for a feeder circuit for both branch circuits.

NOTES:

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

max voltage deviation from average voltage

= 100 x

average voltage

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 – 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.

3.The 75-kW 208/240-v electric heat can be factory installed but it must be wired sepa- rately in the field.

4.The convenience outlet full load amps (FLA) are 5, 3 and 3 for 208/230, 460, 575-v units, respectively.

5.The FLA load amps provided in the table for electric heaters are based on 208/240, 480 and 600 v.

6. MCA calculation for 50HG014-028 units with electric heaters over 50 kW is = 1.25 x (IFM + Power Exhaust + Convenience Outlet FLA amps) + 1.00 x (Electric Heater FLA).

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