Bryant 576b installation instructions Electrical Data

Table 4 — Electrical Data

UNIT	NOMINAL VOLTAGE	VOLTAGE RANGE		COMPRESSOR		OFM	POWER SUPPLY
	(V-Ph-Hz)	Min	Max	RLA	LRA	FLA	MCA	MOCP
569C072	208/230-3-60	187	254	21.8	158	1.9	30.1	40
	460-3-60	414	508	10.0	79	1.0	13.5	20
	575-3-60	518	632	9.0	65	1.9	14.1	20
569C090	208/230-3-60	187	254	28.8	195	3.8	39.8	50
	460-3-60	414	508	14.7	95	1.9	20.3	25
	575-3-60	518	632	10.8	80	1.9	15.4	20
569C120	208/230-3-60	187	254	37.8	239	3.1	51.1	70
	460-3-60	414	508	17.2	125	1.4	23.4	30
	575-3-60	518	632	14.3	90	1.4	19.8	25
	208/230-3-60	187	254	31.5	160	3.1	42.5	50
576B090	380-3-60	342	418	19.0	75	2.2	26.0	35
	460-3-60	414	508	15.7	80	1.4	21.0	25
	575-3-60	518	632	12.6	64	1.4	17.2	20
	208/230-3-60	187	254	39.7	198	3.1	52.7	70
576B102	380-3-60	342	418	24.0	93	2.2	32.2	40
	460-3-60	414	508	19.9	99	1.4	26.3	35
	575-3-60	518	632	15.9	79	1.4	21.3	25
	208/230-3-60	187	254	39.7	198	3.1	52.7	70
576B120	380-3-60	342	418	24.0	93	2.2	32.2	40
	460-3-60	414	508	19.9	99	1.4	26.3	35
	575-3-60	518	632	15.9	79	1.4	21.3	25

		LEGEND
CSA	—	Canadian Standards Association
FLA	—	Full Load Amps
HACR	— Heating, Air Conditioning and Refrigeration
LRA	—	Locked Rotor Amps
MCA	—	Minimum Circuit Amps
MOCP —		Maximum Overcurrent Protection

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

	452 + 464 + 455
Average Voltage	=
	3

NEC	—	National Electrical Code
OFM	—	Outdoor (Condenser) Fan Motor

=

1371

RLA	—	Rated Load Amps
UL	—	Underwriters’ Laboratories

3 = 457

(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:

NOTES:

% Voltage Imbalance = 100 x

7

1.In compliance with NEC requirements for multimotor and combina- tion load equipment (refer to NEC Articles 430 and 440), the over- current protective device for the unit shall be fuse or HACR breaker. The 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 percent of voltage imbalance.

% of Voltage Imbalance =

max voltage deviation from average voltage

100 x

average voltage

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maxi- mum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

3.The 575-v units are CSA only.

4.The 380-v units are not UL or CSA listed.

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