Bryant COMMERCIAL AIR COOLED CONDENSING UNITS 576b User Manual
Page 7
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7
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Table 4 — Electrical Data
LEGEND
NOTES:
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 =
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
(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:
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.
UNIT
NOMINAL VOLTAGE
(V-Ph-Hz)
VOLTAGE RANGE
COMPRESSOR
OFM
POWER SUPPLY
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
576B090
208/230-3-60
187
254
31.5
160
3.1
42.5
50
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
576B102
208/230-3-60
187
254
39.7
198
3.1
52.7
70
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
576B120
208/230-3-60
187
254
39.7
198
3.1
52.7
70
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
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
NEC
—
National Electrical Code
OFM
—
Outdoor (Condenser) Fan Motor
RLA
—
Rated Load Amps
UL
—
Underwriters’ Laboratories
100 x
max voltage deviation from average voltage
average
voltage
Average Voltage
=
452 + 464 + 455
3
=
1371
3
=
457
% Voltage Imbalance
=
100 x
7
457
=
1.53%