Bryant 558F, 551A Legend And Notes For Electrical Data Tables, PERFORMANCE DATA cont, 551B036

PERFORMANCE DATA (cont)

ELECTRIC HEATING CAPACITIES

			ACCESSORY	ACCESSORY
UNIT	VOLTAGE	ACCESSORY	HEATER	SINGLE POINT BOX
551B	(60 Hz)	kW	PART NUMBER	PART NO.
			CRHEATER---A00	CRSINGLE---A00
		4.4	101	—
	208/230	6.5	102	—
	(single	8.7	103	—
	phase)	10.5	104	—
		13.0*	102*	004
		4.4	101	—
036	208/230	6.5	102	—
		8.7	103	—
	(3 phase)
		10.5	104	—
		16.0	105	—
		6.0	106	—
	460	8.8	107	—
	(3 phase)	11.5	108	—
		14.0	109	—
		4.4	101	—
	208/230	8.7	103	—
	(single	13.0*	102*	004
	phase)	17.4*	103*	004
		21.0*	104*	004
048		6.5	102	—
	208/230	8.7	103	—
	(3 phase)	16.0	105	—
		21.0*	104*	002
		6.0	106	—
	460	11.5	108	—
	(3 phase)	14.0	109	—
		23.0*	108*	—
		6.5	102	—
	208/230	8.7	103	—
	(single	13.0*	102*	004
	phase)	17.4*	103*	004
		21.0*	104*	004
		6.5	102	—
060	208/230	10.5	104	—
		16.0	105	—
	(3 phase)
		21.0*	104*	002
		26.5*	105,104	002
		6.0	106	—
	460	11.5	108	—
		14.0	109	—
	(3 phase)
		23.0*	108*	—
		25.5*	109,108	—
		6.5	102	—
	208/230	10.5	104	—
		16.0	105	—
	(3 phase)
		21.0*	104*	002
072		26.5*	105,104	002
		6.0	106	—
	460	11.5	108	—
		14.0	109	—
	(3 phase)
		23.0*	108*	—
		25.5*	109,108	—

			ACCESSORY	ACCESSORY
UNIT	VOLTAGE	ACCESSORY	HEATER	SINGLE POINT BOX
551B	(60 Hz)	kW	PART NUMBER	PART NO.
			CRHEATER---A00	CRSINGLE---A00
		10.5	117	006
	208/230	16.0	110	006
		24.8	111	007
	(3 phase)
		32.0	112	007
		42.4*	112,117	007†	551B036-
090,	(3 phase)	34.0	119	006
		14.0	116	006
102	460	16.5	113	006
	(3 phase)	27.8	114	006
		33.0	115	006
		41.7*	114,116	008
	575	17.0	118	006
					150
		10.5	117	012
	208/230	16.0	110	012
		32.0	112	012
	(3 phase)
		42.4*	112,117	015
		50.0*	112,110	015
120,		16.5	113	011
		27.8	114	011
150	460
		33.0	115	011**
	(3 phase)
		41.7*	114,116	014
		50.0*	115,113	014
	575	17.0	118	011
		34.0	119	011
	(3 phase)
		51.0*	119,118	014

*Two heater packages required to provide kW indicated.

†009 for 551B102 units.

**On units with factory-installed outlet, use CRSINGLE014A00.

NOTES:

1.The kW ratings shown above are at 240, 480, and 600 v. Use the Multiplica- tion Factors table below to determine heater capacity for your particular voltage.

MULTIPLICATION FACTORS

HEATER kW	VOLTAGE DISTRIBUTION	MULTIPLICATION
RATING	V/3/60	FACTOR
	200	.69
240	208	.75
	230	.92
	240	1.00
480	440	.84
	460	.92
	480	1.00
600	550	.84
	575	.92
	600	1.00

Example: 32.0 kW (at 240 v) heater on 208 v

=32.0 (.75 mult factor)

=24.0 kW capacity at 208 v

2.Heaters are not available for size 036-072 575-v units.

LEGEND AND NOTES FOR ELECTRICAL DATA TABLES

LEGEND

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

IFM — Indoor (Evaporator) Fan Motor

LRA — Locked Rotor Amps

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC — National Electrical Code

OFM — Outdoor (Condenser) Fan Motor

RLA — Rated Load Amps

UL — Underwriters’ Laboratories

*Used to determine minimum disconnect per NEC.

†Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v or 575 v. If power distribution voltage to unit varies form rated heater voltage, heater kW will vary accordingly.

**Fuse or HACR circuit breaker per NEC. ††Units have 2 condenser-fan motors.

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 ImbalanceExample: Supply voltage is 460-3-60.

max voltage deviation from average voltage

= 100 x

average voltage

Example: Supply voltage is 460-3-60.

AB = 452 v BC = 464 v AC = 455 v

452 + 464 + 455

Average Voltage =

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. % Voltage Imbalance = 100 x 4577

= 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.

3.Non-fused disconnect switch cannot be used when rooftop unit electrical ratings exceed 80 amps.

4.575-v units have UL, Canada approval only. Electric heaters are not avail- able for 036-072, 575-v units.

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