Carrier 40RU manual Electrical Data, Standard Motors, Electrical Data, Alternate Motors

Table 4 – Electrical Data, Standard Motors

					VOLTAGE		FAN MOTOR
UNIT	---V---PH		Hz{				Hp (kW)	FLA
					LIMITS
40RUA*25	208/230---		3---	60	187---	253	5.0 (3.73)	14.7/13.6
	460	3---	60		414	506	5.0 (3.73)	6.8
40RUQ*25
40RUS*25	575	3---	60		518	632	5.0 (3.73)	5.1
40RUA*28	208/230---		3---	60	187---	253	7.5 (5.59)	21.4/19.4
	460	3---	60		414	506	7.5 (5.59)	9.7
40RUS*28
	575	3---	60		518	632	7.5 (5.59)	7.8
40RUA30	208/230---		3---	60	187---	253	10.0 (7.46)	28.0/25.2
	460	3---	60		414	506	10.0 (7.46)	12.6
40RUS30
	575	3---	60		518	632	10.0 (7.46)	10.3

POWER SUPPLY

Minimum	MOCP
Circuit Amps
18.4/17.0	30/25
8.5	15
6.4	15
26.9/24.3	45/40

12.120

9.8	15
35.0/31.5	60/50

15.825

12.920

40RU

See Legend and Notes below.

Table 5 – Electrical Data, Alternate Motors

					VOLTAGE		FAN MOTOR
UNIT	V---PH		Hz{
							Hp (kW)	FLA
					LIMITS
40RUA*25	208/230---		3---	60	187---	253	7.5 (5.59)	21.4/19.4
	460	3---	60		414	506	7.5 (5.59)	9.7
40RUQ*25
40RUS*25	575	3---	60		518	632	7.5 (5.59)	7.8
40RUA*28	208/230---		3---	60	187---	253	10.0 (7.46)	28.0/25.2
40RUA*30
	460	3---	60		414	506	10.0 (7.46)	12.6
40RUS*28
	575	3---	60		518	632	10.0 (7.46)	10.3
40RUS*30

POWER SUPPLY

Minimum	MOCP
Circuit Amps
26.9/24.3	45/40

12.120

9.8	15
35.0/31.5	60/50

15.825

12.920

See Legend and Notes below.

Legend and Notes for Tables 4 and 5

LEGEND:

FLA	---	Full Load Amps
MOCP	---	Maximum Overcurrent Protection

{Motors are designed for satisfactory operation within 10% of normal voltage shown. Voltages should not exceed the limits shown in the Voltage Limits column.

NOTES:

1.Minimum circuit amps (MCA) and MOCP values are calcu- lated in accordance with The NEC. Article 440.

2.Motor FLA values are established in accordance with Under- writers’ Laboratories (UL). Standard 1995.

3.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the formula in the example (see column to the right) to determine the percentage of volt- age imbalance.

4.Installation with Accessory Electric Heaters

Size the Field Power Wiring between the heater TB1 and the 40RU indoor fan motor per NEC Article 430--- 28 (1) or (2) (depends on length of conduit between heater enclosure and 40RU power entry location). Install wires in field--- installed conduit.

Example: Supply voltage is 230-3-60

% Voltage Imbalance = 100 x	max voltage deviation from average voltage
	average voltage

AB = 393 v

BC = 403 v

AC = 396 v

Average Voltage =	(393 + 403 + 396)	=	1192
	3		3

=397

Determine maximum deviation from average voltage. (AB) 397 – 393 = 4 v

(BC) 403 – 397 = 6 v (AC) 397 – 396 = 1 v Maximum deviation is 4 v.

Determine percent of voltage imbalance.

% Voltage Imbalance	= 100 x	6
		397
	= 1.5%

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.

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