Trane RT-SVX19A-E4 manual Scroll compressors Compressor electrical phasing, With Electric heat

Installation

Scroll compressors

Compressor electrical phasing

Proper phasing of the electrical power wiring is critical for proper operation and reliability of the scroll compressor and fans.

Proper rotation of the scroll compressor must be established before the unit is started. This is accomplished by confirming that the electrical phase sequence of the power supply is correct. The motor is internally connected for clockwise rotation with the inlet power supply phased A, B, C.

Table 21 - Electrical data - YKD/YKH Unit Wiring
	Electrical Characteristics Unit amps
				Standard Evaporator		Oversized Evaporator
				Fan Motor		Fan Motor
					Maximum		Maximum
	UNIT		MPS	Minimum	Overcurrent	Minimum	Overcurrent
					Protective		Protective
				Circuit		circuit
					Device (Fuse		Device (Fuse
				Ampacity		ampacity
					or Circuit		or Circuit
					Breaker)		Breaker)
	Without Electric heat option
	TKD/H	155	400/3/50	35	50	36.9	50
	TKD/H	175	400/3/50	41	50	41.9	50
	TKD/H	200	400/3/50	44	63	44.5	63
	TKD/H	250	400/3/50	46.4	63	-	-
	WKD/H	125	400/3/50	31.9	40	33.8	40
	WKD/H	155	400/3/50	35.1	50	37	50
	WKD/H	200	400/3/50	50.4	63	50.9	63
	YKD/H	155	400/3/50	35.6	50	37.5	50
	YKD/H	175	400/3/50	42.3	50	43.2	50
	YKD/H	200	400/3/50	44.6	63	45.1	63
	YKD/H	250	400/3/50	46.4	63	-	-
	With Electric heat
	TKD/H	155	400/3/50	41	63	43	63
	TKD/H	175	400/3/50	43	63	43	63
	TKD/H	200	400/3/50	61	80	61	80
	TKD/H	250	400/3/50	62	80	-	-
	WKD/H	125	400/3/50	68	80	69.9	80
	WKD/H	155	400/3/50	71.2	80	73.1	80
	WKD/H	200	400/3/50	104.5	125	105	125

The direction of rotation may be reversed by interchanging any two of the line wires. It is this possible interchange of wiring that makes a phase sequence indicator necessary if the operator is to quickly determine the phase rotation of the compressor motor.

The "ABC" indicator on the face of the phase indicator will glow if phase is ABC for terminals L1, L2, L3.

CAUTION! After completion of wiring, check all electrical connections, and ensure all connections are tight. Replace and secure all electrical box covers and access doors before leaving unit or connecting power to circuit supplying unit.

CAUTION! Units with Scroll compressors are not equipped with crankcase heaters.

WARNING !

Disconnect all power,including remote disconnects, and discharge all capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. After power is removed, allow

4 minutes for capacitors to discharge. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and/or discharge capacitors before servicing could result in death or serious injury. For additional information regarding the safe discharge of capacitors, see Trane Service Bulletin PROD-SVB06A.

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