Bryant 549C manual ELECTRICAL DATA - 548F cont, Legend

ELECTRICAL DATA — 548F (cont)

548F036-120 (UNITS WITH ELECTRICAL CONVENIENCE OUTLET) (cont)

				VOLTAGE		COMPRESSOR						ELECTRIC			POWER SUPPLY				DISCONNECT
	UNIT	NOMINAL	IFM	RANGE			(each)		OFM	IFM		HEAT*								SIZE†
	548F	V-PH-Hz	TYPE	Min	Max	RLA		LRA	FLA	FLA	Nominal		FLA	MCA		MOCP		FLA			LRA
											kW**
											—		—	40.4/ 40.4		45/ 45††		40/ 40			195/195
											4.9/	6.5	13.6/15.6	57.4/	59.9	60/	60††	56/	58		208/211
			STD	187	254	22.7		146.0	1.4	5.8	7.9/10.5		21.9/25.3	67.8/	72.0	70/	80	65/	69		217/220
											12.0/16.0		33.3/38.5	82.0/	88.5	90/	90	78/	84		228/233***
											15.8/21.0		43.9/50.5	95.3/103.5		100/110		90/	98		239/245***
		208/230-3-60									19.9/26.5		55.2/63.8	109.4/120.1		110/125		103/113			250/259***
											—		—	42.1/ 42.1		45/ 45††		42/ 42			214/214
											4.9/	6.5	13.6/15.6	59.1/	61.6	60/	70	58/	60		227/229
548F			HIGH-STATIC	187	254	22.7		146.0	1.4	7.5	7.9/10.5		21.9/25.3	69.5/	73.7	70/	80	67/	71		236/239
											12.0/16.0		33.3/38.5	83.7/	90.2	90/100		80/	86		247/252***
											15.8/21.0		43.9/50.5	97.0/105.2		100/110		92/100			258/264***
											19.9/26.5		55.2/63.8	111.1/121.8		125/125		105/115			269/278***
	072										—		—	19.7		20††		19			97
	(6 Tons)										6.0		7.2	28.7		30††		28			104
			STD	414	508	11.4		73.0	0.7	2.6	11.5		13.8	37.0		40††		35			111
											14.0		16.8	40.7		45††		39			114
											23.0		27.7	54.4		60††		51			125
		460-3-60									25.5		30.7	58.1		60††		55			128
											—		—	20.5		25††		20			107
											6.0		7.2	29.5		30††		29			114
			HIGH-STATIC	414	508	11.4		73.0	0.7	3.4	11.5		13.8	37.8		40††		36			121
											14.0		16.8	41.5		45††		40			124
											23.0		27.7	55.2		60††		52			134
											25.5		30.7	58.9		60††		56			137
		575-3-60	STD	518	632	9.1		58.4	0.7	2.6	—		—	15.8		20††		16			78
			HIGH-STATIC	518	632	9.1		58.4	0.7	3.4	—		—	16.4		20††		16			85

	LEGEND
FLA	— Full Load Amps
HACR	— Heating, Air Conditioning and Refrigeration
IFM	— Indoor Fan Motor
LRA	— Locked Rotor Amps
MCA	— Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC	— National Electrical Code
OFM	— Outdoor Fan Motor
RLA	— Rated Load Amps

*Heaters are field installed only.

†Used to determine minimum disconnect size per NEC.

**Heater capacity (kW) is based on heater voltage of 208 v, 240 v and 480 v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly.

††Fuse or HACR circuit breaker.

***Optional disconnect switch is unavailable.

NOTES:

1.In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker.

2.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percent of voltage imbalance.

% Voltage Imbalance

= 100 x	max voltage deviation from average voltage
	average voltage
Example: Supply voltage is 460-3-60.
	AB = 452 v
	BC = 464 v
	AC = 455 v
	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 of voltage imbalance. 7

% Voltage Imbalance =100 x 457

= 1.53%

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.

POWER EXHAUST ELECTRICAL DATA

POWER EXHAUST	MCA	MCA	MCA	MOCP
				(for separate
PART NO.	(230 v)	(460 v)	(575 v)
				power source)
CRPWREXH021A01	N/A	0.68	N/A	15
CRPWREXH022A01	3.4	N/A	1.32	15
CRPWREXH023A01	N/A	1.4	N/A	15
CRPWREXH028A01	1.7	N/A	0.68	15
CRPWREXH029A01	N/A	0.7	N/A	15
CRPWREXH030A01	1.6	N/A	0.64	15

N/A — Not available

NOTE: If a single power source is to be used, size wire to include power exhaust MCA and MOCP.

Check MCA and MOCP when power exhaust is powered through the unit. Deter- mine the new MCA including the power exhaust using the following formula: MCA New = MCA unit only + MCA of Power Exhaust

For example, using a 548F060 unit with MCA = 35.6 and MOCP = 40, with CRPWREXH030A01 power exhaust.

MCA New = 35.6 amps + 1.6 amps = 37.2 amps

If the new MCA does not exceed the published MOCP, then MOCP would not change. The MOCP in this example is 40 amps and the MCA New is below 40; therefore the MOCP is acceptable. If “MCA New” is larger than the published MOCP, raise the MOCP to the next larger size. In all cases, the MOCP for the power exhaust should be 15 amps per NEC.

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