Bryant 558J MCA/MOCP Determination no C.O. or Unpwrd C.O, Electric Heater, IFM MCA No P.E FLA LRA

558J

Table 32 – MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.

	HZ		ELECTRIC HEATER					NO C.O. or UNPWRD C.O.
UNIT
	---PHV---	IFM			MCA	NO P.E.	FLA		LRA	MCA	w/ P.E. (pwrd fr/unit)			LRA
		TYPE	kW	FLA		MOCP						MOCP	FLA
							DISC. SIZE						DISC. SIZE
			---	---	27.2	40	26		95	29.1		45	29	97
			3.3/4.4	15.9/18.3	27.2/29.0	40/40	26/27		95/95	29.1/31.4		45/45	29/29	97/97
		STD	4.9/6.5	23.5/27.1	35.5/40.0	40/45	33/37		95/95	37.9/42.4		45/45	35/39	97/97
	--- 60		6.5/8.7	31.4/36.3	45.4/51.5	50/60	42/47		95/95	47.8/53.9		50/60	44/50	97/97
			7.9/10.5	37.9/43.8	53.5/60.9	60/70	49/56		95/95	55.9/63.3		60/70	51/58	97/97
	--- 1
			9.8/13.0	46.9/54.2	64.8/73.9	70/80	60/68		95/95	67.1/76.3		70/80	62/70	97/97
	208/230		4.9/6.5	23.5/27.1	35.5/40.0	40/45	33/37		95/95	37.9/42.4		45/45	35/39	97/97
			---	---	27.2	40	26		95	29.1		45	29	97
			3.3/4.4	15.9/18.3	27.2/29.0	40/40	26/27		95/95	29.1/31.4		45/45	29/29	97/97
		MED	6.5/8.7	31.4/36.3	45.4/51.5	50/60	42/47		95/95	47.8/53.9		50/60	44/50	97/97
			7.9/10.5	37.9/43.8	53.5/60.9	60/70	49/56		95/95	55.9/63.3		60/70	51/58	97/97
			9.8/13.0	46.9/54.2	64.8/73.9	70/80	60/68		95/95	67.1/76.3		70/80	62/70	97/97
			---	---	19.4	25	19		89	21.3		30	22	91
			3.3/4.4	9.2/10.6	19.4/19.4	25/25	19/19		89/89	21.3/21.8		30/30	22/22	91/91
		STD	4.9/6.5	13.6/15.6	23.1/25.6	25/30	21/24		89/89	25.5/28.0		30/30	23/26	91/91
			6.5/8.7	18.1/20.9	28.8/32.3	30/35	26/30		89/89	31.1/34.6		35/35	29/32	91/91
			7.9/10.5	21.9/25.3	33.5/37.8	35/40	31/35		89/89	35.9/40.1		40/45	33/37	91/91
			12.0/16.0	33.4/38.5	47.9/54.3	50/60	44/50		89/89	50.3/56.6		60/60	46/52	91/91
	---60		---	---	19.4	25	19		89	21.3		30	22	91
			3.3/4.4	9.2/10.6	19.4/19.4	25/25	19/19		89/89	21.3/21.8		30/30	22/22	91/91
	--- 3
		MED	4.9/6.5	13.6/15.6	23.1/25.6	25/30	21/24		89/89	25.5/28.0		30/30	23/26	91/91
558J*04	208/230		6.5/8.7	18.1/20.9	28.8/32.3	30/35	26/30		89/89	31.1/34.6		35/35	29/32	91/91
			7.9/10.5	21.9/25.3	33.5/37.8	35/40	31/35		89/89	35.9/40.1		40/45	33/37	91/91
			12.0/16.0	33.4/38.5	47.9/54.3	50/60	44/50		89/89	50.3/56.6		60/60	46/52	91/91
			---	---	19.7	30	20		107	21.6		30	22	109
			3.3/4.4	9.2/10.6	19.7/19.8	30/30	20/20		107/107	21.6/22.1		30/30	22/22	109/109
		HIGH	4.9/6.5	13.6/15.6	23.5/26.0	30/30	22/24		107/107	25.9/28.4		30/30	24/26	109/109
			6.5/8.7	18.1/20.9	29.1/32.6	30/35	27/30		107/107	31.5/35.0		35/40	29/32	109/109
			7.9/10.5	21.9/25.3	33.9/38.1	35/40	31/35		107/107	36.3/40.5		40/45	33/37	109/109
			12.0/16.0	33.4/38.5	48.3/54.6	50/60	44/50		107/107	50.6/57.0		60/60	47/52	109/109
			---	---	10.2	15	10		46	11.2		15	11	47
			6.0	7.2	11.6	15	11		46	12.9		15	12	47
		STD	8.8	10.6	15.9	20	15		46	17.1		20	16	47
			11.5	13.8	19.9	20	18		46	21.1		25	19	47
			14.0	16.8	23.6	25	22		46	24.9		25	23	47
	60		---	---	10.2	15	10		46	11.2		15	11	47
			6.0	7.2	11.6	15	11		46	12.9		15	12	47
	3---
		MED	8.8	10.6	15.9	20	15		46	17.1		20	16	47
	---
			11.5	13.8	19.9	20	18		46	21.1		25	19	47
	460
			14.0	16.8	23.6	25	22		46	24.9		25	23	47
			---	---	10.7	15	11		55	11.7		15	12	56
			6.0	7.2	12.3	15	11		55	13.5		15	12	56
		HIGH	8.8	10.6	16.5	20	15		55	17.8		20	16	56
			11.5	13.8	20.5	25	19		55	21.8		25	20	56
			14.0	16.8	24.3	25	22		55	25.5		30	23	56
	3--- 60	STD	---	---	7.3	15	7		44	9.2		15	9	46
		MED	---	---	7.3	15	7		44	9.2		15	9	46
	575---
		HIGH	---	---	7.4	15	7		50	9.3		15	10	52

LEGEND:
CO	---	Convenient outlet
DISC	---	Disconnect
FLA	---	Full load amps
IFM	---	Indoor fan motor
LRA	---	Locked rotor amps
MCA	---	Minimum circuit amps
MOCP	--- Maximum over current protection
PE	---	Power exhaust
UNPWRD CO	---	Unpowered convenient outlet
NOTES:

1.In compliance with NEC requirements for multimotor and combina- tion load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit 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 percentage of voltage imbalance.

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

Example: Supply voltage is 230-3-60

AB = 224 v

BC = 231 v

AC = 226 v

Average Voltage =	(224 + 231	+ 226)	=	681
	3			3
=	227

Determine maximum deviation from average voltage.

(AB) 227 – 224 = 3 v	Maximum deviation is 4 v.
(BC) 231 – 227 = 4 v	Determine percent of voltage imbalance.
% Voltage Imbalance	= 100 x	4
		227
	= 1.76%

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%, con- tact your local electric utility company immediately.

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