Carrier 48HJ015-025 Ð Make Electrical Connections, Ð Field Power Wiring Connections

Step 8 Ð Make Electrical Connections

FIELD POWER SUPPLY Ð Unit is factory wired for volt- age shown on unit nameplate.

When installing units, provide a disconnect per NEC (National Electrical Code) of adequate size (Table 2).

All ®eld wiring must comply with NEC and local requirements.

Route power and ground lines through control box end panel or unit basepan (see Fig. 4 and 5) to connections as shown on unit wiring diagram and Fig. 14.

The unit must be electrically grounded in accordance with local codes and NEC ANSI/NFPA 70 (National Fire Protection Association).

Field wiring must conform to temperature limitations for type ``T'' wire. All ®eld wiring must comply with NEC and local requirements.

Transformer no. 1 is wired for 230-v unit. If 208/230-v unit is to be run with 208-v power supply, the transformer must be rewired as follows:

1.Remove cap from red (208 v) wire.

2.Remove cap from orange (230 v) spliced wire.

3.Replace orange wire with red wire.

4.Recap both wires.

	LEGEND
EQUIP	Ð Equipment
GND	Ð Ground
NEC	Ð National Electrical Code
TB	Ð Terminal Board

NOTE: Maximum wire size for TB1 is 2/0.

Fig. 14 Ð Field Power Wiring Connections

IMPORTANT: BE CERTAIN UNUSED WIRES ARE CAPPED. Failure to do so may damage the transformers.

Operating voltage to compressor must be within voltage range indicated on unit nameplate. On 3-phase units, volt- ages between phases must be balanced within 2%.

Table 2 Ð Electrical Data

	NOMINAL	VOLTAGE		COMPRESSOR							OFM					IFM		POWER		COMBUSTION	POWER SUPPLY		DISCONNECT
UNIT	VOLTAGE	RANGE		No. 1		No. 2												EXHAUST		FAN MOTOR			SIZE
48HJ	(3 Ph,
		Min	Max	RLA	LRA	RLA	LRA	Qty			FLA	LRA			Hp	FLA	LRA	FLA	LRA	FLA	MCA	MOCP*	FLA	LRA
	60 Hz)
											(ea)	(ea)
	208/230	187	254	39.7	228	Ð	Ð	3			1.7	3.8	3.7			10.5/10.5	84.5/84.5	Ð	Ð	0.57	65/65	100/100	64/64	324/324
																		4.6	18.8	0.57	70/70	100/100	70/70	343/343
015	460	414	508	19.9	114	Ð	Ð	3			0.8	1.9	3.7			4.8	42.3	Ð	Ð	0.30	32	50	32	162
																		2.3	6.0	0.30	34	50	34	168
	575	518	632	16.0	91	Ð	Ð	3	0.75			1.5		3		3.9	23.4	Ð	Ð	0.57	26	40	26	119
																		2.1	4.8	0.57	28	40	29	124
	208/230	187	254	28.2	160	28.2	160	3		1.7		24.8		5		15.8/15.8	105/91	Ð	Ð	0.57	84/84	110/100	90/90	499/485
																		4.6	18.8	0.57	89/89	110/110	95/95	518/504
017	460	414	508	14.1	80	14.1	80	3		0.8		10.8		5		7.9	46	Ð	Ð	0.30	42	50	45	238
																		2.3	6.0	0.30	44	50	47	244
	575	518	632	11.3	64	11.3	64	3		0.75		8.4		5		6.0	37	Ð	Ð	0.57	34	40	36	190
																		2.1	4.8	0.57	36	45	39	195
	208/230	187	254	35.6	198	35.6	198	2		5.5		24.8		10		28.0/28.0	193/168	Ð	Ð	0.57	119/119	150/150	127/127	639/614
																		4.6	18.8	0.57	124/124	150/150	133/133	657/632
025	460	414	508	17.8	99	17.8	99	2		2.8		10.8		10		14.6	84	Ð	Ð	0.30	60	70	65	304
																		2.3	6.0	0.30	63	80	67	310
	575	518	632	14.3	79	14.3	79	2		3.4		8.4		10		13.0	66	Ð	Ð	0.57	52	60	56	241
																		2.1	4.8	0.57	54	60	59	246

FLA	Ð	LEGEND
		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
NEC	Ð	National Electrical Code
OFM	Ð Outdoor (Condenser) Fan Motor
RLA	Ð	Rated Load Amps

*This is the maximum size permissible; smaller fuse size may be used where conditions permit.

NOTES: In compliance with NEC requirements for multimotor and combina- tion load equipment (refer to NEC Articles 430 and 440), the overcurrent pro- tective device for the unit shall be fuse or HACR breaker. The Canadian units may be fuse or circuit breaker.

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