Bryant 588A User Manual
Page 20
ELECTRICAL DATA
UNIT
588A
V-PH-Hz
VOLTAGE
RANGE
COMPRESSOR
COND.
FAN
MOTOR
INDOOR
FAN
POWER SUPPLY
AWG 60 C
MIN WIRE
SIZE
MAX WIRE
LENGTH
(ft)
Min
Max
RLA
LRA
FLA
FLA
MCA
MOCP*
018
208/230-1-60
187
253
7.6
45
0.7
1.8
12.0
15
14
75
024
208/230-1-60
187
253
12.4
61
0.7
2.0
18.2
30
12
80
030
208/230-1-60
187
253
14.4
82
1.4
2.0
21.8
30
10
100
208/230-3-60
187
253
9.4
66
1.4
2.0
15.5
25
12
80
036
208/230-1-60
187
253
18.0
96
1.4
2.8
26.7
40
10
90
208/230-3-60
187
253
11.7
75
1.4
2.8
18.8
30
12
65
460-3-60
414
506
5.6
40
0.8
1.4
9.2
10
14
100
042
208/230-1-60
187
253
20.4
104
1.4
4.0
30.9
50
8
100
208/230-3-60
187
253
14.0
91
1.4
4.0
22.9
35
10
85
460-3-60
414
506
6.4
42
0.8
2.0
10.8
15
14
100
048
208/230-1-60
187
253
26.4
129
2.1
5.0
40.1
60
6
100
208/230-3-60
187
253
15.0
99
2.1
5.0
25.9
40
10
75
460-3-60
414
506
8.2
50
1.1
2.3
13.7
20
14
100
060
208/230-1-60
187
253
32.1
169
2.1
6.8
49.0
60
6
100
208/230-3-60
187
253
19.3
123
2.1
6.8
33.0
50
8
90
460-3-60
414
506
10.0
62
1.1
3.2
16.8
25
12
100
LEGEND
AWG
— American Wire Gage
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 (fuses or HACR-type
circuit breaker)
NEC
— National Electrical Code
RLA
— Rated Load Amps
*Fuse or HACR breaker.
†Minimum wire size is based on 60 C copper wire. If other than 60 C is
used, determine size from NEC. Voltage drop of wire must be less than
2% of rated voltage.
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. The CSA
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.
% Voltage Imbalance
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.
7
% Voltage Imbalance = 100 x
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.
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