59
Table 7B — Electrical Data High Ambient 125 F Data, Standard Condenser Fan (cont)
LEGEND
*Amperages in ( ) are for units with cooler heaters installed.
†Wye-delta start is standard. Across-the-line start is not available.
**Circuit A/Circuit B.
NOTES:
1. Main power must be supplied from a field-supplied fused electrical service with a
(factory or field-installed) disconnect located in sight from the unit.
2. Cooler heater, oil heater, and control circuit power must be supplied from a separate
source through a field-supplied disconnect. The control circuit power transformer acces-
sory may be applied to power from the main unit power supply.
3. Maximum incoming wire size for each terminal block is 500 kcmil.
4. Maximum allowable supply voltage phase imbalance is voltage 2%.
5. Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
Use the following formula to determine the percent voltage imbalance.
Percent Voltage Imbalance
Example: Supply voltage is 240-3-60.
AB = 243 v
BC = 236 v
AC = 238 v
Determine maximum deviation from average voltage:
(AB) 243 – 239 = 4 v
(BC) 239 – 236 = 3 v
(AC) 239 – 238 = 1 v
Maximum deviation is 4 v. Determine percent voltage imbalance:
This amount of phase imbalance is satisfactory as it is below the maximum allow-
able 2%.
UNIT
30GXN,R
UNIT VOLTAGE
POWER
SUPPLY
QTY. REQ’D
STANDARD CONDENSER FAN CONTROL CIRCUIT
V-Hz
(3 Ph)
Supplied
# Power Supply
Conductors
MCA MOCP
ICF Rec Fuse Size
V-Hz
(Single Ph)
MCA and
MOCP*
Min Max XL WD XL WD
225
208/230-60 187 253 2 12 609/483** 800/800** † 934.1/808.0** † 700/600** 115-60 30 (50)
230-60 207 253 2 12 550/443** 800/700** † 914.8/808.0** † 700/600** 115-60 30 (50)
460-60 414 506 1 6 458 600 1444.2 640.2 500 500 115-60 30 (50)
575-60 518 633 1 3 366 450 1154.9 511.9 400 400 115-60 30 (50)
380-60 342 418 1 6 559 700 1628.8 739.8 700 700 230-60 15 (25)
228
208/230-60 187 253 2 12 693/374** 1000/600** † 1017.9/609.0** † 800/450** 115-60 30 (50)
230-60 207 253 2 12 627/296** 800/500** † 991.8/557.0** † 800/350** 115-60 30 (50)
460-60 414 506 1 6 461 600 1446.8 642.8 500 500 115-60 30 (50)
575-60 518 633 1 3 368 450 1156.6 513.6 400 400 115-60 30 (50)
380-60 342 418 1 6 561 700 1631.3 742.3 700 700 230-60 15 (25)
249
208/230-60 187 253 2 12 753/421** 1000/600** † 1077.7/659.0** † 1000/500** 115-60 30 (50)
230-60 207 253 2 12 681/389** 800/600** † 1045.6/659.0** † 800/500** 115-60 30 (50)
460-60 414 506 1 6 503 600 1489.1 685.1 600 600 115-60 30 (50)
575-60 518 633 1 6 400 500 1189.4 546.4 450 450 115-60 30 (50)
380-60 342 418 1 6 612 700 1681.8 792.8 700 700 230-60 15 (25)
253
208/230-60 187 253 2 12 752/448** 1000/700** † 1077.4/685.0** † 1000/600** 115-60 30 (50)
230-60 207 253 2 12 681/389** 800/600** † 1045.6/659.0** † 800/500** 115-60 30 (50)
460-60 414 506 1 6 516 600 1501.9 697.9 600 600 115-60 30 (50)
575-60 518 633 1 6 412 500 1200.6 557.6 450 450 115-60 30 (50)
380-60 342 418 1 6 628 800 1698.4 809.4 700 700 230-60 15 (25)
264
208/230-60 187 253 2 12 753/496** 1000/800** † 1077.7/821.0** † 1000/600** 115-60 30 (50)
230-60 207 253 2 12 681/456** 800/700** † 1045.6/821.0** † 800/600** 115-60 30 (50)
460-60 414 506 1 6 530 600 1516.0 712.0 600 600 115-60 30 (50)
575-60 518 633 1 6 422 500 1211.2 568.2 500 500 115-60 30 (50)
380-60 342 418 1 6 645 800 1715.2 826.2 700 700 230-60 15 (25)
268
208/230-60 187 253 2 12 752/522** 1000/800** † 1077.4/847.0** † 1000/700** 115-60 30 (50)
230-60 207 253 2 12 681/482** 800/700** † 1045.6/847.0** † 800/600** 115-60 30 (50)
460-60 414 506 1 6 543 600 1528.8 724.8 600 600 115-60 30 (50)
575-60 518 633 1 6 433 500 1222.1 579.1 500 500 115-60 30 (50)
380-60 342 418 1 6 661 800 1731.0 842.0 800 800 230-60 15 (25)
281
460-60 414 506 1 6 563 700 1549.3 745.3 700 700 115-60 30 (50)
575-60 518 633 1 6 450 500 1239.2 596.2 500 500 115-60 30 (50)
380-60 342 418 1 6 689 800 1758.7 869.7 800 800 230-60 15 (25)
301
460-60 414 506 1 6 597 700 1582.7 778.7 700 700 115-60 30 (50)
575-60 518 633 1 6 476 500 1264.8 621.8 600 600 115-60 30 (50)
380-60 342 418 2 9 354/420** 500/600** 1423.4/1489.3** 534.4/600.3** 400/500** 400/500** 230-60 15 (25)
325
460-60 414 506 1 6 640 700 1626.3 822.3 700 700 115-60 30 (50)
575-60 518 633 1 6 509 600 1298.2 655.2 600 600 115-60 30 (50)
380-60 342 418 2 9 379/445** 500/600** 1449.0/1514.9** 560.0/625.9** 450/500** 450/500** 230-60 15 (25)
350
460-60 414 506 1 6 694 800 1680.1 876.1 800 800 115-60 30 (50)
575-60 518 633 1 6 553 600 1341.8 698.8 600 600 115-60 30 (50)
380-60 342 418 2 12 413/479** 500/600** 1482.4/1548.3** 593.4/659.3** 500/600** 500/600** 230-60 15 (25)
ICF —
Maximum Instantaneous Current Flow
MCA —
Minimum Circuit Ampacity (for wire sizing)
MOCP —
Maximum Overcurrent Protection
Rec Fuse Size —
Recommended Dual-Element Fuse Amps (150% of largest
compressor rated load amps [RLA] plus 100% of remaining
compressor RLAs and sum of condenser fan full load amps
[FLAs]. Choose next largest standard fuse size.)
WD —
Wye-Delta Start
XL —
Across-the-Line Start
= 100 x
max voltage deviation from average voltage
average voltage
Average voltage =
243 + 236 + 238
3
= 239 v
% Voltage Imbalance = 100 x
4
239
= 1.7%
IMPORTANT: Contact your local electric utility company immediately if the supply
voltage phase imbalance is more than 2%.
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