46
ELECTRICAL DATA (cont)
581B036-072 HIGH-STATIC MOTOR (Units Without Electrical Convenience Outlet)
581B036-072 HIGH-STATIC MOTOR (Units With Electrical Convenience Outlet)
LEGEND
*Used to determine minimum disconnect per NEC.
†Fuse or HACR circuit breaker.
NOTES:
1. In compliance with NEC requirements for multimotor and combina-
tion load equipment (refer to NEC Articles 430 and 440), the overcur-
rent protective device for the unit shall be fuse or HACR breaker. UL,
Canada 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.
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
= 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
= 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.
UNIT
581B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
COMPRESSOR
(each)
OFM
IFM
COMBUSTION
FAN MOTOR
POWER
SUPPLY
MINIMUM UNIT
DISCONNECT
SIZE*
Min
Max
RLA
LRA
FLA
FLA
RLA
MCA
MOCP†
FLA
LRA
036
208/230-3-60
187
254
10.3
77.0
0.7
5.8
0.6
19.4/19.4
25/25
19/19
120/120
460-3-60
414
508
5.1
39.0
0.4
2.6
0.3
9.4
15
9
60
575-3-60
518
632
4.2
31.0
0.4
2.6
0.3
7.7
15
8
48
048
208/230-3-60
187
254
13.5
99.0
0.7
5.8
0.6
23.4/23.4
30/30
23/23
142/142
460-3-60
414
508
7.4
49.5
0.4
2.6
0.3
12.3
15
12
71
575-3-60
518
632
5.8
40.0
0.4
2.6
0.3
9.7
15
9
57
060
208/230-3-60
187
254
17.3
123.0
1.5
7.5
0.6
30.6/30.6
35/35
30/30
187/187
460-3-60
414
508
9.0
62.0
0.8
3.4
0.3
15.5
20
15
94
575-3-60
518
632
7.1
50.0
0.8
3.4
0.3
12.2
15
12
76
072
208/230-3-60
187
254
20.5
156.0
1.4
7.5
0.6
30.6/30.6
35/35
30/30
187/187
460-3-60
414
508
9.6
70.0
0.6
3.4
0.3
15.5
20
15
94
575-3-60
518
632
7.7
56.0
0.6
3.4
0.3
12.2
15
12
76
UNIT
581B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
COMPRESSOR
(each)
OFM
IFM
COMBUSTION
FAN MOTOR
POWER
SUPPLY
MINIMUM UNIT
DISCONNECT
SIZE*
Min
Max
RLA
LRA
FLA
FLA
RLA
MCA
MOCP†
FLA
LRA
036
208/230-3-60
187
254
10.3
77.0
0.7
5.8
0.6
25.4/25.4
30/30
25
124/124
460-3-60
414
508
5.1
39.0
0.4
2.6
0.3
12.1
15
12
63
575-3-60
518
632
4.2
31.0
0.4
2.6
0.3
9.8
15
10
50
048
208/230-3-60
187
254
13.5
99.0
0.7
5.8
0.6
29.4/29.4
35/35
29
146/146
460-3-60
414
508
7.4
49.5
0.4
2.6
0.3
15.0
20
14
73
575-3-60
518
632
5.8
40.0
0.4
2.6
0.3
11.8
15
11
59
060
208/230-3-60
187
254
17.3
123.0
1.5
7.5
0.6
36.6/36.6
40/40
36
192/192
460-3-60
414
508
9.0
62.0
0.8
3.4
0.3
18.2
20
18
96
575-3-60
518
632
7.1
50.0
0.8
3.4
0.3
14.4
20
14
77
072
208/230-3-60
187
254
20.5
156.0
1.4
7.5
0.6
40.5/40.5
45/45
39
224/224
460-3-60
414
508
9.6
70.0
0.6
3.4
0.3
18.7
25
18
104
575-3-60
518
632
7.7
56.0
0.6
3.4
0.3
15.0
20
15
89
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
= 100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
452 + 464 + 455
3
=
1371
3
7
457