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Table 2A — Electrical Data — Standard Motor Units Without Electrical Convenience Outlet
UNIT
NOMINAL VOLTAGE
581B
(V-Ph-Hz)
208/230-1-60
208/230-3-60
036
(3 Tons)
460-3-60
575-3-60
208/230-1-60
208/230-3-60
048
(4 Tons)
460-3-60
575-3-60
208/230-1-60
208/230-3-60
060
(5 Tons)
460-3-60
575-3-60
208/230-3-60
072
460-3-60
(6 Tons)
575-3-60
Table 2B — Electrical Data — Standard Motor Units With Electrical Convenience Outlet
UNIT
NOMINAL VOLTAGE
581B
(V-Ph-Hz)
208/230-1-60
208/230-3-60
036
(3 Tons)
460-3-60
575-3-60
208/230-1-60
208/230-3-60
048
(4 Tons)
460-3-60
575-3-60
208/230-1-60
208/230-3-60
060
(5 Tons)
460-3-60
575-3-60
208/230-3-60
072
460-3-60
(6 Tons)
575-3-60
LEGEND
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
*The values listed in this table do not include power exhaust. See table at right for
power exhaust requirements.
†Used to determine minimum disconnect per NEC.
**Fuse or HACR circuit breaker.
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 UL, Canada units
may be fuse or circuit breaker.
2. Electrical data based on 95 F ambient outdoor-air temperature ± 10% voltage.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where phase imbalance in supply voltage is greater
than 2%. Use the following formula to determine the percent 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
Average Voltage =
Determine maximum deviation from average voltage.
VOLTAGE
COMPRESSOR
RANGE
(each)
Min
Max
Qty
RLA
LRA
187
254
16.0
187
254
10.3
1
414
508
5.1
518
632
4.2
187
254
23.7
126.0
187
254
13.5
1
414
508
6.4
518
632
6.4
187
254
28.8
169.0
187
254
17.3
123.0
1
414
508
9.0
518
632
7.1
187
254
20.5
156.0
414
508
1
9.6
518
632
7.7
VOLTAGE
COMPRESSOR
RANGE
(each)
Min
Max
Qty
RLA
LRA
187
254
16.0
187
254
10.3
1
414
508
5.1
518
632
4.2
187
254
23.7
126.0
187
254
13.5
1
414
508
6.4
518
632
6.4
187
254
28.8
169.0
187
254
17.3
123.0
1
414
508
9.0
518
632
7.1
187
254
20.5
156.0
414
508
1
9.6
518
632
7.7
452 + 464 + 455
3
1371
=
3
= 457
OFM
COMBUSTION
IFM
(each)
FAN MOTOR
FLA
FLA
FLA
88.0
0.7
4.9
.60
77.0
0.7
4.9
.60
39.0
0.4
2.2
.30
31.0
0.4
2.2
.30
0.7
4.9
.60
93.0
0.7
4.9
.60
46.5
0.4
2.2
.30
40.0
0.4
2.2
.30
1.5
8.8
.60
1.5
5.8
.60
62.0
0.8
2.6
.30
50.0
0.8
2.6
.30
1.4
5.8
.60
75.0
0.6
2.6
.30
56.0
0.6
2.6
.30
OFM
COMBUSTION
IFM
(each)
FAN MOTOR
FLA
FLA
FLA
88.0
0.7
4.9
.60
77.0
0.7
4.9
.60
39.0
0.4
2.2
.30
31.0
0.4
2.2
.30
0.7
4.9
.60
93.0
0.7
4.9
.60
46.5
0.4
2.2
.30
40.0
0.4
2.2
.30
1.5
8.8
.60
1.5
5.8
.60
62.0
0.8
2.6
.30
50.0
0.8
2.6
.30
1.4
5.8
.60
75.0
0.6
2.6
.30
56.0
0.6
2.6
.30
(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
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.
POWER EXHAUST ELECTRICAL DATA
POWER EXHAUST
PART NO.
CRPWREXH021A01
CRPWREXH022A01
CRPWREXH023A01
CRPWREXH028A01
CRPWREXH029A01
CRPWREXH030A01
N/A — Not available
NOTE: If a single power source is to be used, size wire to include power exhaust
MCA and MOCP.
Check MCA and MOCP when power exhaust is powered through the unit. Deter-
mine the new MCA including the power exhaust using the following formula:
MCA New = MCA unit only + MCA of Power Exhaust
For example, using a 581B072 unit with MCA = 32.8 and MOCP = 40, with
CRPWREXH030A01 power exhaust.
MCA New = 32.8 amps + 1.6 amps = 34.4 amps
If the new MCA does not exceed the published MOCP, then MOCP would not
change. The MOCP in this example is 40 amps and the MCA New is below 40;
therefore the MOCP is acceptable. If "MCA New" is larger than the published
MOCP, raise the MOCP to the next larger size. For separate power, the MOCP for
the power exhaust will be 15 amps per NEC.
—
—
11
POWER
MINIMUM UNIT
SUPPLY*
DISCONNECT SIZE†
MCA
MOCP**
FLA
25.6/25.6
30/30
25/25
18.5/18.5
25/25
18/18
9.0
20
9
7.3
20
7
35.2/35.2
45/45
34/34
22.5/22.5
30/30
22/22
10.6
20
10
10.1
20
10
46.3/46.3
60/60
45/45
28.9/28.9
35/35
28/28
14.7
20
14
11.6
20
12
32.8/32.8
40/40
32/32
15.2
20
15
12.2
20
12
POWER
MINIMUM UNIT
SUPPLY
DISCONNECT SIZE†
WITH OUTLET*
MCA
MOCP**
FLA
31.6/31.6
35/35
30/30
24.5/24.5
30/30
24/24
11.7
20
11
9.5
20
9
41.2/41.2
50/50
39/39
28.5/28.5
35/35
27/27
13.3
20
13
12.2
20
12
52.3/52.3
60/60
50/50
34.9/34.9
40/40
34/34
17.4
20
17
13.8
20
13
38.8/38.8
45/45
37/37
17.9
20
17
14.3
20
14
7
457
= 1.53%
MCA
MCA
MCA
(230 v)
(460 v)
(575 v)
N/A
0.9
N/A
3.3
N/A
1.32
N/A
1.8
N/A
1.7
N/A
0.68
N/A
1.0
N/A
1.6
N/A
0.64
LRA
101/101
90/90
46
37
139/139
106/106
54
46
216/216
168/168
84
68
200/200
97
74
LRA
106/106
95/95
48
38
144/144
111/111
56
47
221/221
173/173
87
70
205/205
99
75
MOCP
(for separate
power source)
15
15
15
15
15
15
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