Carrier specifications 50PTH,PTV,PTD Electrical Data

conform to the Class II temperature limitations described in the NEC.

Refer to unit wiring diagrams Fig. 15-24 for a schematic of the field connections, which must be made by the installing (or electrical) contractor. For Deluxe D with WSHP Open controls 3-phase units and Complete C with Open controls single-phase and 3-phase units contact Application Engineering. Refer to Table 4 for fuse sizes.

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.

Operating voltage must be the same voltage and phase as shown in electrical data shown in Table 4.

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

POWER CONNECTION — Make line voltage connection by connecting the incoming line voltage wires to the line side of the compressor contactor terminal as shown in Fig. 25. See Table 4 for amperage ratings to provide correct wire and maximum overcurrent protection sizing.

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

On 3-phase units, voltages under load between phases must be balanced within 2%. Use the following formula to deter- mine the percentage voltage imbalance:

% Voltage Imbalance

= 100 x	max voltage deviation from average voltage
	average voltage

Example: Supply voltage is 460-3-60.

AB = 452 volts

BC = 464 volts

AC = 455 volts

Average Voltage = 452 + 464 + 455 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 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%.

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 your local electric utility.

208-VOLT OPERATION — All 208-230 volt units are factory wired for 208 volts. The transformers may be switched to 230-volt operation by switching the red (208 volt) wire with the orange (230 volt) wire at the L1 terminal.

460-VOLT OPERATION — Units using 460-v and an ECM (electronically commutated motor) fan motor, modulating HWR, and/or internal secondary pump will require a neutral wire from the supply side in order to feed accessory with 265-v.

Table 4 — 50PTH,PTV,PTD Electrical Data

50PTH,		VOLTAGE	COMPRESSOR		FAN	TOTAL	MIN	MAX		UNITS WITH HWR
PTV, PTD	V-PH-Hz*				MOTOR		CIRCUIT	FUSE/	REHEAT	TOTAL	MIN	MAX
		MIN/MAX	RLA	LRA		UNIT FLA			PUMP	UNIT	CIRCUIT	FUSE/
UNITS					FLA		AMPS	HACR	FLA	FLA	AMP	HACR
026	208/230-1-60	197/254	10.3	52.0	4.3	14.6	17.2	25	0.8	15.4	18.0	25
	208/230-1-60	197/254	16.7	82.0	4.3	21.0	25.2	40	0.8	21.8	26.0	40
038	208/230-3-60	197/254	11.2	58.0	4.3	15.5	18.3	25	0.8	16.3	19.1	30
	460-3-60	414/506	4.5	29.0	4.1	8.6	9.7	15	0.7	9.3	10.4	15
	208/230-1-60	197/254	21.2	96.0	7.0	28.2	33.5	50	1.07	29.3	34.6	50
049	208/230-3-60	197/254	13.5	88.0	7.0	20.5	23.9	35	1.07	21.6	24.9	35
	460-3-60	414/506	6.4	41.0	6.9	13.3	14.9	20	1.07	14.4	16.0	20
	208/230-1-60	197/254	25.6	118.0	7.0	32.6	39.0	60	1.07	33.7	40.1	60
064	208/230-3-60	197/254	17.6	123.0	7.0	24.6	29.0	45	1.07	25.7	30.1	45
	460-3-60	414/506	9.0	62.0	6.9	15.9	18.2	25	1.07	17.7	19.2	25
072	208/230-1-60	197/254	27.2	150.0	7.0	34.2	41.0	60	1.07	35.3	42.1	60

	LEGEND
FLA	— Full Load Amps
HACR	— Heating, Air Conditioning and Refrigeration
LRA	— Locked Rotor Amps
RLA	— Rated Load Amps
HWR	— Hot Water Reheat

*The 460-v units using an ECM (electronically commutated motor) fan motor, modulating HWR, and/or an internal secondary pump will require a neutral wire from the supply side in order to feed the accessory with 265-v.

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