Bryant 558J manual PH---HZ Electric Heater, Unit IFM No P.E

558J

Table 38 – MCA/MOCP DETERMINATION W/ PWRD C.O.

	PH---HZ		ELECTRIC HEATER					w/ PWRD C.O.
UNIT		IFM				NO P.E.				w/ P.E. (pwrd fr/unit)
		TYPE	kW	FLA	MCA	MOCP	DISC. SIZE		MCA		MOCP	DISC. SIZE
	---
							FLA	LRA				FLA	LRA
	V
			---	---	35.3	50	35	162	37.2		50	37	164
			4.9/6.5	13.6/15.6	35.3/35.3	50/50	35/35	162/162	37.2/37.2		50/50	37/37	164/164
		STD	7.9/10.5	21.9/25.3	39.9/44.1	50/50	37/41	162/162	42.3/46.5		50/50	39/43	164/164
			12.0/16.0	33.4/38.5	54.3/60.6	60/70	50/56	162/162	56.6/63.0		60/70	52/58	164/164
			15.8/21.0	43.8/50.5	67.3/75.6	70/80	62/70	162/162	69.6/78.0		70/80	64/72	164/164
			19.9/26.5	55.2/63.8	81.5/92.3	90/100	75/85	162/162	83.9/94.6		90/100	77/87	164/164
	---60		---	---	37.6	50	38	188	39.5		50	40	190
			4.9/6.5	13.6/15.6	37.6/37.6	50/50	38/38	188/188	39.5/39.5		50/50	40/40	190/190
	---3	MED	7.9/10.5	21.9/25.3	42.8/47.0	50/50	39/43	188/188	45.1/49.4		50/50	42/45	190/190
	208/230		12.0/16.0	33.4/38.5	57.1/63.5	60/70	53/58	188/188	59.5/65.9		60/70	55/61	190/190
			15.8/21.0	43.8/50.5	70.1/78.5	80/80	65/72	188/188	72.5/80.9		80/90	67/74	190/190
			19.9/26.5	55.2/63.8	84.4/95.1	90/100	78/88	188/188	86.8/97.5		90/100	80/90	190/190
			---	---	37.6	50	38	188	39.5		50	40	190
			4.9/6.5	13.6/15.6	37.6/37.6	50/50	38/38	188/188	39.5/39.5		50/50	40/40	190/190
		HIGH	7.9/10.5	21.9/25.3	42.8/47.0	50/50	39/43	188/188	45.1/49.4		50/50	42/45	190/190
			12.0/16.0	33.4/38.5	57.1/63.5	60/70	53/58	188/188	59.5/65.9		60/70	55/61	190/190
			15.8/21.0	43.8/50.5	70.1/78.5	80/80	65/72	188/188	72.5/80.9		80/90	67/74	190/190
			19.9/26.5	55.2/63.8	84.4/95.1	90/100	78/88	188/188	86.8/97.5		90/100	80/90	190/190
558J*06		STD	---	---	17.7	25	18	81	18.7		25	19	82
			6.0	7.2	17.7	25	18	81	18.7		25	19	82
			11.5	13.8	23.3	25	21	81	24.5		25	23	82
			14.0	16.8	27.0	30	25	81	28.3		30	26	82
			23.0	27.7	40.6	45	37	81	41.9		45	39	82
			25.5	30.7	44.4	45	41	81	45.6		50	42	82
			---	---	18.5	25	19	94	19.5		25	20	95
	--- 60		6.0	7.2	18.5	25	19	94	19.5		25	20	95
			11.5	13.8	24.3	25	22	94	25.5		30	23	95
	3	MED
			14.0	16.8	28.0	30	26	94	29.3		30	27	95
	---
	460		23.0	27.7	41.6	45	38	94	42.9		45	39	95
			25.5	30.7	45.4	50	42	94	46.6		50	43	95
			---	---	19.5	25	20	103	20.5		30	21	104
			6.0	7.2	19.5	25	20	103	20.5		30	21	104
		HIGH	11.5	13.8	25.5	30	23	103	26.8		30	25	104
			14.0	16.8	29.3	30	27	103	30.5		35	28	104
			23.0	27.7	42.9	45	39	103	44.1		45	41	104
			25.5	30.7	46.6	50	43	103	47.9		50	44	104
	60	STD	---	---	13.6	20	13	65	15.5		20	16	67
	3---	MED	---	---	14.4	20	14	76	16.3		20	17	78
	575---
		HIGH	---	---	14.4	20	14	76	16.3		20	17	78

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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