Carrier 48AJ installation instructions Unit

Table 8B — Electrical Data — 48AJ,AK,AW,AY Units with Convenience Outlet (cont)

UNIT		VOLTAGE				COMPRESSOR						CONDENSER		EVAPORATOR		POWER	CONVENIENCE	POWER SUPPLY
	VOLTAGE	RANGE		Cir A, No. 1		Cir A, No. 2		Cir B, No. 1		Cir B, No. 2		FAN MOTOR		FAN MOTOR		EXHAUST	OUTLET
SIZE	3 PH, 60 Hz
48A		Min	Max	RLA	LRA	RLA	LRA	RLA	LRA	RLA	LRA	Qty	FLA	Hp	FLA	FLA (total)	FLA	MCA	Fuse or
																			HACR Brkr*
														20	59.4	—	7.0	257.5	300
																35.4	7.0	292.9	350
														25	74.8	—	7.0	276.7	350
													6.5			35.4	7.0	312.1	350
	208	187	229	34.3	265	34.3	265	34.3	265	34.3	265	6
													(ea)	30	88	—	7.0	293.2	350
																35.4	7.0	328.6	400
														40	114	—	7.0	325.7	400
																35.4	7.0	361.1	450
														20	54	—	7.0	251.3	300
																35.4	7.0	286.7	300
														25	68	—	7.0	268.8	300
													6.6			35.4	7.0	304.2	350
	230	207	253	34.3	265	34.3	265	34.3	265	34.3	265	6
													(ea)	30	80	—	7.0	283.8	350
																35.4	7.0	319.2	350
														40	104	—	7.0	313.8	400
																35.4	7.0	349.2	450
051
														20	27	—	3.5	121.1	125
																18.9	3.5	140.0	150
														25	34	—	3.5	129.8	150
													3.3			18.9	3.5	148.7	175
	460	414	508	16	120	16	120	16	120	16	120	6
													(ea)	30	40	—	3.5	137.3	175
																18.9	3.5	156.2	175
														40	52	—	3.5	152.3	200
																18.9	3.5	171.2	200
														20	22	—	2.5	97.2	110
																14.4	2.5	111.6	125
														25	27	—	2.5	103.5	125
													2.6			14.4	2.5	117.9	125
	575	518	632	12.9	80	12.9	80	12.9	80	12.9	80	6
													(ea)	30	32	—	2.5	109.7	125
																14.4	2.5	124.1	150
														40	41	—	2.5	121.0	150
																14.4	2.5	135.4	175
														25	75.0	—	7.0	315.1	350
																35.4	7.0	350.5	400
	208	187	229	40.8	265	47	380	40.8	265	47	380	6	6.5	30	88.0	—	7.0	331.6	400
													(ea)			35.4	7.0	367.0	450
														40	114.0	—	7.0	364.1	450
																35.4	7.0	399.5	500
														25	68.0	—	7.0	307.2	350
																35.4	7.0	342.6	400
	230	207	253	40.8	265	47	380	40.8	265	47	380	6	6.6	30	80.0	—	7.0	322.2	400
													(ea)			35.4	7.0	357.6	400
														40	104.0	—	7.0	352.2	450
																35.4	7.0	387.6	450
060
														25	34.0	—	3.5	151.0	175
																18.9	3.5	169.9	200
	460	414	508	20.2	135	22.4	175	20.2	135	22.4	175	6	3.3	30	40.0	—	3.5	158.5	175
													(ea)			18.9	3.5	177.4	200
														40	52.0	—	3.5	173.5	225
																18.9	3.5	192.4	225
														25	27.0	—	2.5	122.3	125
																14.4	2.5	136.7	150
	575	518	632	16.6	120	18.6	140	16.6	120	18.6	140	6	2.6	30	32.0	—	2.5	128.5	150
													(ea)			14.4	2.5	142.9	150
														40	41.0	—	2.5	139.8	175
																14.4	2.5	154.2	175

		LEGEND
FLA	—	Full Load Amps
HACR	— Heating, Air Conditioning and Refrigeration
LRA	—	Locked Rotor Amps
MCA	— Minimum Circuit Amps
NEC	— National Electrical Code
RLA	—	Rated Load Amps

*Fuse or HACR circuit breaker per NEC.

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. 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 voltage is greater than 2%. Use the following formula to determine the percent of volt- age 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.

% Voltage Imbalance	= 100 x	7
		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.

28