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Table 4 — Electrical Data — 50EJ,EK,EW,EY024-048 (cont)
UNIT
SIZE
NOMINAL
VOLTAGE
(3 Ph 60 Hz)
VOLTAGE
RANGE
COMPRESSOR
OFM IFM
POWER
EXHAUST
ELECTRIC
HEAT*
POWER SUPPLY
No. 1 No. 2
Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA kW FLA MCA MOCP†
038
208/230 187 254 57.1 266 57.1 266 4 1 5.3
10
30.8/
28.0
— — — — 180.5/177.7 225/225
23.6 41.6 — — 204.1/201.3 250/250
— — 29/36 75.1/ 86.6 180.5/177.7 225/225
23.6 41.6 29/36 75.1/ 86.6 204.1/201.3 250/250
— — 59/72 150.1/173.2 188.6/208.2 225/225
23.6 41.6 59/72 150.1/173.2 218.1/237.7 250/250
15
46.2/
42.0
— — — — 195.9/191.7 250/225
23.6 41.6 — — 219.5/215.3 275/250
— — 29/36 75.1/ 86.6 195.9/191.7 250/225
23.6 41.6 29/36 75.1/ 86.6 219.5/215.3 275/250
— — 59/72 150.1/173.2 207.9/225.7 250/250
23.6 41.6 59/72 150.1/173.2 237.4/255.2 275/275
20
59.4/
54.0
— — — — 209.1/203.7 250/250
23.6 41.6 — — 232.7/227.3 275/275
— — 29/36 75.1/ 86.6 209.1/203.7 250/250
23.6 41.6 29/36 75.1/ 86.6 232.7/227.3 275/275
— — 59/72 150.1/173.2 224.4/240.7 275/275
23.6 41.6 59/72 150.1/173.2 253.9/270.2 300/300
460 414 508 25.6 120 25.6 120 4 1 2.7
10 14
— — — — 82.4 100
12.6 23.6 — — 95.0 110
— — 36 43.3 82.4 100
12.6 23.6 36 43.3 95.0 110
— — 72 86.6 104.1 110
12.6 23.6 72 86.6 119.9 125
15 21
— — — — 89.4 110
12.6 23.6 — — 102.0 125
— — 36 43.3 89.4 110
12.6 23.6 36 43.3 102.0 125
— — 72 86.6 112.9 125
12.6 23.6 72 86.6 128.6 150
20 27
— — — — 95.4 110
12.6 23.6 — — 108.0 125
— — 36 43.3 95.4 110
12.6 23.6 36 43.3 108.0 125
— — 72 86.6 120.4 125
12.6 23.6 72 86.6 136.1 150
575 518 632 20.5 96 20.5 96 4 1 2.4
10 11
— — — — 66.7 80
12.6 23.6 — — 79.3 90
— — 36 34.6 66.7 80
12.6 23.6 36 34.6 79.3 90
— — 72 69.3 83.0 90
12.6 23.6 72 69.3 98.8 100
15 17
— — — — 72.7 90
12.6 23.6 — — 85.3 100
— — 36 34.6 72.7 80
12.6 23.6 36 34.6 85.3 100
— — 72 69.3 90.5 100
12.6 23.6 72 69.3 106.3 110
20 22
— — — — 77.7 90
12.6 23.6 — — 90.3 110
— — 36 34.6 77.7 90
12.6 23.6 36 34.6 90.3 110
— — 72 69.3 96.8 110
12.6 23.6 72 69.3 112.5 125
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
*Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v, and 575 v.
If power distribution voltage to unit varies from rated heatervoltage, heater kW will
vary accordingly.
†Fuse or HACR circuit breaker.
NOTES:
1. Incompliance with NECrequirements formultimotor andcombination loadequip-
ment (refertoNECArticles 430and 440),the overcurrentprotective devicefor 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 motorwhere a phase imbalancein supply voltage is greaterthan
2%.
Use the following formula to determine the percent of voltage imbalance.
max voltage deviation from average voltage
% Voltage Imbalance = 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.
3. MCAcalculation for units with electric heaters over 50kW = (1.25 x IFM amps) +
(1.00 x heater FLA).
21