Bryant manual Electrical Data 574B Standard Electrical Data

ELECTRICAL DATA

574B (STANDARD) ELECTRICAL DATA

UNIT		VOLTAGE		COMPRESSOR		OUTDOOR FAN	INDOOR FAN
		RANGE				MOTOR	MOTOR	POWER SUPPLY
SIZE	V-PH-Hz
574B									MAX FUSE
		Min	Max	RLA	LRA	FLA	FLA	MCA	OR BKR
024	208/230–1–60	187	253	13.5	61.0	0.8	4.3	22.0/22.0	30/30
030	208/230–1–60	187	253	16.9	73.0	0.8	4.3	25.0/25.0	30/30
036	208/230–1–60	187	253	15.9	83.0	0.8	6.8	28.7/28.7	35/35
	208/230–3–60	187	253	12.2	77.0	0.8	6.8	22.9/22.9	30/30
042	208/230–1–60	187	253	22.4	105.0	0.8	6.8	35.6/35.6	45/45
	208/230–3–60	187	253	15.4	88.0	0.8	6.8	26.9/26.9	35/35
048	208/230–1–60	187	253	21.3	109.0	1.6	6.8	35.0/35.0	45/45
	208/230–3–60	187	253	14.7	91.0	1.6	6.8	26.8/26.8	35/35
060	208/230–1–60	187	253	27.0	145.0	1.6	9.1	44.5/44.5	60/60
	208/230–3–60	187	253	18.1	123.0	1.6	9.1	33.3/33.3	40/40

	LEGEND
FLA	— Full Load Amps
LRA	— Locked Rotor Amps	®
MCA	— Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA	— Rated Load Amps

*Heater capacity (KW) based on heater voltage of 208v, 240v, & 480v. If power distribution voltage to unit varies from rated heater voltage, heater KW will vary accordingly.

NOTES:

1.In compliance with NEC (National Electrical Code) requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be Power Supply fuse . The CGA (Canadian Gas Association) units may be fuse or circuit breaker.

2.Minimum wire size is based on 60 C copper wire. If other than 60 C wire is used, or if length exceeds wire length in table, determine size from NEC.

3.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt- age 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 460-3-60.

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

Average Voltage = 452 + 464 + 455 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		7
	457

= 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.

C99024

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