Bryant 558J manual 15.5 16.5 11.5

Table 35 – MCA/MOCP DETERMINATION W/ PWRD C.O.

	HZ		ELECTRIC HEATER					NO C.O. or UNPWRD C.O.
UNIT	---PHV---	IFM				NO P.E.	FLA		LRA		w/ P.E. (pwrd fr/unit)			LRA
		TYPE	kW	FLA	MCA	MOCP	DISC. SIZE			MCA		MOCP	DISC. SIZE
			---	---	30.5	45	30		157	32.4		50	32	159
			4.9/6.5	13.6/15.6	30.5/30.5	45/45	30/30		157/157	32.4/32.4		50/50	32/32	159/159
		STD	7.9/10.5	21.9/25.3	33.9/38.1	45/45	31/35		157/157	36.3/40.5		50/50	33/37	159/159
			12.0/16.0	33.4/38.5	48.3/54.6	50/60	44/50		157/157	50.6/57.0		60/60	47/52	159/159
			15.8/21.0	43.8/50.5	61.3/69.6	70/70	56/64		157/157	63.6/72.0		70/80	59/66	159/159
			19.9/26.5	55.2/63.8	75.5/86.3	80/90	69/79		157/157	77.9/88.6		80/90	72/82	159/159
	---60		---	---	32.8	50	32		183	34.7		50	34	185
			4.9/6.5	13.6/15.6	32.8/32.8	50/50	32/32		183/183	34.7/34.7		50/50	34/34	185/185
	---3	MED	7.9/10.5	21.9/25.3	36.8/41.0	50/50	34/38		183/183	39.1/43.4		50/50	36/40	185/185
	208/230		12.0/16.0	33.4/38.5	51.1/57.5	60/60	47/53		183/183	53.5/59.9		60/60	49/55	185/185
			15.8/21.0	43.8/50.5	64.1/72.5	70/80	59/67		183/183	66.5/74.9		70/80	61/69	185/185
			19.9/26.5	55.2/63.8	78.4/89.1	80/90	72/82		183/183	80.8/91.5		90/100	74/84	185/185
			---	---	32.8	50	32		183	34.7		50	34	185
			4.9/6.5	13.6/15.6	32.8/32.8	50/50	32/32		183/183	34.7/34.7		50/50	34/34	185/185
		HIGH	7.9/10.5	21.9/25.3	36.8/41.0	50/50	34/38		183/183	39.1/43.4		50/50	36/40	185/185
			12.0/16.0	33.4/38.5	51.1/57.5	60/60	47/53		183/183	53.5/59.9		60/60	49/55	185/185
			15.8/21.0	43.8/50.5	64.1/72.5	70/80	59/67		183/183	66.5/74.9		70/80	61/69	185/185
			19.9/26.5	55.2/63.8	78.4/89.1	80/90	72/82		183/183	80.8/91.5		90/100	74/84	185/185
558J*07		STD	---	---	15.5	25	15		79	16.5		25	16	80
			6.0	7.2	15.5	25	15		79	16.5		25	16	80
			11.5	13.8	20.5	25	19		79	21.8		25	20	80
			14.0	16.8	24.3	25	22		79	25.5		30	23	80
			23.0	27.7	37.9	40	35		79	39.1		40	36	80
			25.5	30.7	41.6	45	38		79	42.9		45	39	80
			---	---	16.3	25	16		92	17.3		25	17	93
	--- 60		6.0	7.2	16.3	25	16		92	17.3		25	17	93
			11.5	13.8	21.5	25	20		92	22.8		25	21	93
	3	MED
			14.0	16.8	25.3	30	23		92	26.5		30	24	93
	---
	460		23.0	27.7	38.9	40	36		92	40.1		45	37	93
			25.5	30.7	42.6	45	39		92	43.9		45	40	93
			---	---	17.3	25	17		101	18.3		25	18	102
			6.0	7.2	17.3	25	17		101	18.3		25	18	102
		HIGH	11.5	13.8	22.8	25	21		101	24.0		25	22	102
			14.0	16.8	26.5	30	24		101	27.8		30	26	102
			23.0	27.7	40.1	45	37		101	41.4		45	38	102
			25.5	30.7	43.9	45	40		101	45.1		50	42	102
	60	STD	---	---	11.9	15	12		63	13.8		20	14	65
	3---	MED	---	---	12.7	20	12		74	14.6		20	15	76
	575---
		HIGH	---	---	12.7	20	12		74	14.6		20	15	76

558J

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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