Carrier 50PSW036-360 specifications Wire Electrical Connections, 50PSW Electrical Data

Step 6 — Wire Electrical Connections

WARNING

To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation. Install lockout tag.

CAUTION

Use only copper conductors for field-installed electrical wiring. Unit terminals are not designed to accept other types of conductors. Failure to heed this warning could result in equipment damage.

All field-installed wiring, including the electrical ground, MUST comply with the National Electrical Code (NEC) as well as applicable local codes. In addition, all field wiring must conform to the Class II temperature limitations described in the NEC.

Operating voltage must be the same voltage and phase as shown in Table 3.

Refer to unit wiring diagrams Fig. 4-8 for a schematic of the field connections which must be made by the installing (or electrical) contractor.

Consult the unit wiring diagram located on the inside of the compressor access panel to ensure proper electrical hookup. The installing (or electrical) contractor must make the field connections when using field-supplied disconnect.

Make all final electrical connections with a length of flexi- ble conduit to minimize vibration and sound transmission to the building.

POWER CONNECTION — Line voltage connection is made by connecting incoming line voltage wires to L1, L2, and L3 on the power distribution block.

SUPPLY VOLTAGE — Operating voltage to unit must be within voltage range indicated on unit nameplate.

Voltages between phases must be balanced within 2%. Use the following formula to determine the percentage voltage imbalance:

% Voltage Imbalance

= 100 x	max voltage deviation from average voltage
	average voltage

Example: Supply voltage is 380-3-50.

AB = 372 volts

BC = 376 volts

AC = 384 volts

Average Voltage =	372 + 376 + 384
	3

= 1132 3

= 377

Determine maximum deviation from average voltage:

(AB) 372 – 377 = 5 v (BC) 376 – 377 = 1 v (AC) 384 – 377 = 7 v

Maximum deviation is 7 v. Determine percent voltage imbalance.

% Voltage Imbalance =	100 x	7
		377
=	1.86%

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electri- cal components.

NOTE: If more than 2% voltage imbalance is present, contact local electric utility.

Table 3 — 50PSW Electrical Data

50PSW UNIT		VOLTAGE	VOLTAGE RANGE	COMPRESSOR			TOTAL	MCA	MOCP*
	SIZE	(V-Ph-Hz)	MIN/MAX	RLA	LRA	QTY	FLA
	036	220/240-1-50	198/264	13.5	67	1	13.5	16.9	30
		380/420-3-50	342/462	5.4	38	1	5.4	6.8	15
	060	220/240-1-50	198/264	24.5	153	1	24.5	30.6	50
		380/420-3-50	342/462	9.6	74	1	9.6	12.0	20
	120	220/240-1-50	198/264	24.5	153	2	49.0	55.1	80
		380/420-3-50	342/462	9.6	74	2	19.2	21.6	30
	180	220/240-1-50	198/264	44.9	273	1	44.9	56.1	100
		380/420-3-50	342/462	18.6	118	1	18.6	23.3	40
	360	220/240-1-50	198/264	44.9	273	2	89.8	101.0	125
		380/420-3-50	342/462	18.6	118	2	37.2	46.6	60
		LEGEND
FLA	— Full Load Amps
HACR — Heating, Air Conditioning, and Refrigeration
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Minimum Overcurrent Protection
RLA	— Rated Load Amps

*Time-delay fuse or HACR circuit breaker.

7