138
ELECTRICAL DATA (cont)
581B036-150 UNITS
LEGEND
*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 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
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.
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
N/A — Not Available
*Single or three phase.
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. Determine the
new MCA including the power exhaust using the following formula:
MCA New = MCA unit only + MCA of Power Exhaust
For example, using a 581B060 unit with MCA = 28.9 and MOCP = 35, with
CRPWREXH030A01 power exhaust.
MCA New = 28.9 amps + 1.6 amps = 30.5 amps
If the new MCA does not exceed the published MOCP, then MOCP would not change.
The MOCP in this example is 35 amps and the MCA New is below 35; 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.
UNIT SIZE
581B NOMINAL
V-PH-Hz IFM TYPE CONV
OUTLET
VOLTAGE
RANGE COMPRESSOR (each) OFM (each) IFM
FLA
COMBUSTION
FAN MOTOR POWER SUPPLY* MINIMUM UNIT
DISCONNECT SIZE†
Min Max Qty RLA LRA Qty FLA FLA MCA MOCP** FLA LRA
102
(81/2 Tons)
208/230-3-60
STD NO
187 254 2 13.1 105 2 1.4
7.5
0.6
40.2 45 42 276
YES 46.2 50 48 281
HIGH NO 10.6 43.3 50 46 301
YES 49.3 60 51 305
460-3-60 STD NO
414 508 2 7.4 55 2 0.7 3.4 0.3
21.5 25 23 143
YES 24.2 30 25 145
HIGH NO 4.8 22.9 25 24 156
YES 25.6 30 27 158
575-3-60
STD NO
518 632 2 6.4 44 2 0.6
2.8
0.3
18.2 20 19 115
YES 20.4 25 21 116
HIGH NO 3.3 18.9 25 20 124
YES 21.1 25 22 126
PH NO 0.7 4.8 0.3 19.4 25 20 124
YES 21.5 25 22 126
120
(10 Tons)
208/230-3-60
STD NO
187 254 2 17.6 125 2 1.4
10.6 0.6 53.0 60 56 341
YES 59.0 70 61 345
HIGH NO 15.0 0.6 57.4 70 61 364
YES 63.4 70 66 369
460-3-60 STD NO
414 508 2 8.3 6 2.5 2 0.7 4.8 0.3
24.9 30 26 171
YES 27.6 30 29 173
HIGH NO 7.4 27.5 30 29 182
YES 30.2 35 32 184
575-3-60
STD NO
518 632 2 6.3 50
20.63.3 0.3 19.1 25 20 136
YES 21.3 25 22 138
HIGH NO 5.6 0.3 21.0 25 23 146
YES 23.1 25 25 148
PH NO 20.77.4 0.3 21.2 25 23 146
YES 23.4 25 25 148
150
(121/2 Tons)
208/230-3-60 STD NO 187 254 2 19 156 2 1. 4 15.0 0.6 60.6 70 64 426
YES 66.6 70 70 431
460-3-60 STD NO 414 508 2 9 75 2 0.7 7.4 0.3 29.1 35 31 207
YES 31.8 35 33 209
575-3-60
ST NO
518 632 2 7.4 54
20.65.6 0.3 23.5 30 25 154
YES 25.6 30 27 156
PH NO 20.77.4 0.3 23.7 30 25 154
YES 25.9 30 27 156
CONV — Convenience Outlet
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evapora tor) Fan Motor
LRA — Locked Rotor Amps
MCA —Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
OFM —Outdoor (Condenser) Fan Motor
PH — Perfect Humidity™ Dehumidification System
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%
POWER EXHAUST
PART NO. APPLICATION
USAGE MCA
(230 V) MCA
(460 V) MCA
(575 V)
MOCP
(separate
power source
only)
CRPWREXH030A01 036-072* 1.6 N/A 0.64 15
CRPWREXH021A01 036-072 N/A 0.68 N/A 15
CRPWREXH022A01 090-150* 3.4 N/A 1.32 15
CRPWREXH023A01 090-150 N/A 1.4 N/A 15
CRPWREXH028A01 ALL* 1.7 N/A 0.68 15
CRPWREXH029A01 ALL N/A 0.7 N/A 15
581B036-150