Bryant 558J manual IFM MCA No P.E LRA, Type FLA Mocp DISC. Size

Table 37 – MCA/MOCP DETERMINATION W/ PWRD C.O.

	HZ		ELECTRIC HEATER					w/ PWRD C.O.
UNIT
	---PHV---	IFM			MCA	NO P.E.		LRA	MCA	w/ P.E. (pwrd fr/unit)			LRA
		TYPE	kW	FLA		MOCP	FLA				MOCP	FLA
							DISC. SIZE					DISC. SIZE
			---	---	44.0	60	43	155	45.9		60	45	157
			4.9/6.5	23.5/27.1	44.0/46.0	60/60	43/43	155/155	45.9/48.4		60/60	45/45	157/157
	60	STD	6.5/8.7	31.4/36.3	51.4/57.5	60/60	47/53	155/155	53.8/59.9		60/60	49/55	157/157
			9.8/13.0	46.9/54.2	70.8/79.9	80/80	65/73	155/155	73.1/82.3		80/90	67/76	157/157
	---		13.1/17.4	62.8/72.5	90.6/102.8	100/110	83/95	155/155	93.0/105.1		100/110	86/97	157/157
	--- 1		15.8/21.0	75.8/87.5	106.9/121.5	110/125	98/112	155/155	109.3/123.9		110/125	101/114	157/157
	208/230
			---	---	46.1	60	45	180	48.0		60	48	182
			4.9/6.5	23.5/27.1	46.1/48.6	60/60	45/45	180/180	48.0/51.0		60/60	48/48	182/182
		MED	6.5/8.7	31.4/36.3	54.0/60.1	60/70	50/55	180/180	56.4/62.5		60/70	52/58	182/182
			9.8/13.0	46.9/54.2	73.4/82.5	80/90	68/76	180/180	75.8/84.9		80/90	70/78	182/182
			13.1/17.4	62.8/72.5	93.3/105.4	100/110	86/97	180/180	95.6/107.8		100/110	88/99	182/182
			15.8/21.0	75.8/87.5	109.5/124.1	110/125	101/114	180/180	111.9/126.5		125/150	103/116	182/182
			---	---	30.7	45	31	131	32.6		45	33	133
			4.9/6.5	13.6/15.6	30.7/31.6	45/45	31/31	131/131	32.6/34.0		45/45	33/33	133/133
		STD	7.9/10.5	21.9/25.3	39.5/43.8	45/45	36/40	131/131	41.9/46.1		45/50	39/42	133/133
			12.0/16.0	33.4/38.5	53.9/60.3	60/70	50/55	131/131	56.3/62.6		60/70	52/58	133/133
			15.8/21.0	43.8/50.5	66.9/75.3	70/80	62/69	131/131	69.3/77.6		70/80	64/71	133/133
	60		19.9/26.5	55.2/63.8	81.1/91.9	90/100	75/85	131/131	83.5/94.3		90/100	77/87	133/133
			---	---	31.0	45	31	149	32.9		45	33	151
	---		4.9/6.5	13.6/15.6	31.0/32.0	45/45	31/31	149/149	32.9/34.4		45/45	33/33	151/151
	--- 3	MED	7.9/10.5	21.9/25.3	39.9/44.1	45/45	37/41	149/149	42.3/46.5		45/50	39/43	151/151
	208/230		12.0/16.0	33.4/38.5	54.3/60.6	60/70	50/56	149/149	56.6/63.0		60/70	52/58	151/151
			15.8/21.0	43.8/50.5	67.3/75.6	70/80	62/70	149/149	69.6/78.0		70/80	64/72	151/151
			19.9/26.5	55.2/63.8	81.5/92.3	90/100	75/85	149/149	83.9/94.6		90/100	77/87	151/151
558J*05			---	---	33.3	45	34	175	35.2		50	36	177
			4.9/6.5	13.6/15.6	33.3/34.9	45/45	34/34	175/175	35.2/37.3		50/50	36/36	177/177
		HIGH	7.9/10.5	21.9/25.3	42.8/47.0	45/50	39/43	175/175	45.1/49.4		50/50	42/45	177/177
			12.0/16.0	33.4/38.5	57.1/63.5	60/70	53/58	175/175	59.5/65.9		60/70	55/61	177/177
			15.8/21.0	43.8/50.5	70.1/78.5	80/80	65/72	175/175	72.5/80.9		80/90	67/74	177/177
			19.9/26.5	55.2/63.8	84.4/95.1	90/100	78/88	175/175	86.8/97.5		90/100	80/90	177/177
			---	---	14.7	20	15	62	15.7		20	16	63
			6.0	7.2	14.7	20	15	62	15.7		20	16	63
		STD	11.5	13.8	22.6	25	21	62	23.9		25	22	63
			14.0	16.8	26.4	30	24	62	27.6		30	25	63
			23.0	27.7	40.0	45	37	62	41.3		45	38	63
			25.5	30.7	43.8	45	40	62	45.0		50	41	63
	60		---	---	15.2	20	15	71	16.2		20	16	72
			6.0	7.2	15.2	20	15	71	16.3		20	16	72
	3---	MED	11.5	13.8	23.3	25	21	71	24.5		25	23	72
	---		14.0	16.8	27.0	30	25	71	28.3		30	26	72
	460		23.0	27.7	40.6	45	37	71	41.9		45	39	72
			25.5	30.7	44.4	45	41	71	45.6		50	42	72
			---	---	16.0	20	16	84	17.0		20	17	85
			6.0	7.2	16.0	20	16	84	17.3		20	17	85
		HIGH	11.5	13.8	24.3	25	22	84	25.5		30	23	85
			14.0	16.8	28.0	30	26	84	29.3		30	27	85
			23.0	27.7	41.6	45	38	84	42.9		45	39	85
			25.5	30.7	45.4	50	42	84	46.6		50	43	85
	60	STD	---	---	11.5	15	12	48	13.4		15	14	50
	3---	MED	---	---	12.4	15	13	65	14.3		20	15	67
	---
	575	HIGH	---	---	12.4	15	13	65	14.3		20	15	67

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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