63
Table 7E — Electrical Data High Ambient 125 F Data, Duplex Units (High-Static Condenser Fan)
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. REQD
HIGH-STATIC 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
283A, 328B,
393B, 418B
208/230-60 187 253 2 9 564.0/283** 800/500** † 889.0/518.0** † 700/350** 115-60 30
230-60 207 253 1 6 729.5 1000 † 1094.2 † 1000 115-60 30
460-60 414 506 1 3 354.7 500 1340.6 536.6 400 400 115-60 30
575-60 518 633 1 3 285.4 400 1074.1 431.1 350 350 115-60 30
380-60 342 418 1 6 427.0 600 1497.1 608.1 500 500 230-60 15
283B,
303B, 373B
208/230-60 187 253 1 6 687.2 800 † 924.5 † 800 115-60 30
230-60 207 253 1 6 633.0 800 † 903.0 † 700 115-60 30
460-60 414 506 1 3 308.5 400 1073.0 444.0 350 350 115-60 30
575-60 518 633 1 3 248.1 300 859.7 356.7 300 300 115-60 30
380-60 342 418 1 3 371.5 500 1200.3 504.3 450 450 230-60 15
303A
208/230-60 187 253 2 9 593.2/344** 800/600** † 918.2/581.0** † 700/450** 115-60 30
230-60 207 253 2 9 553.5/311** 800/500** † 918.2/581.0** † 700/400** 115-60 30
460-60 414 506 1 6 389.1 500 1375.0 571.0 450 450 115-60 30
575-60 518 633 1 3 313.2 400 1101.9 458.9 350 350 115-60 30
380-60 342 418 1 6 468.2 600 1538.3 649.3 600 600 230-60 15
328A,
353A/B
208/230-60 187 253 2 12 593.2/418** 800/700** † 918.2/743.0** † 700/600** 115-60 30
230-60 207 253 2 9 553.5/378** 800/600** † 918.2/743.0** † 700/500** 115-60 30
460-60 414 506 1 6 416.0 500 1401.9 597.9 500 500 115-60 30
575-60 518 633 1 3 334.7 450 1123.4 480.4 400 400 115-60 30
380-60 342 418 1 6 500.7 600 1570.9 681.9 600 600 230-60 15
370A,
450A/B, 475B
208/230-60 187 253 2 12 609/564** 800/800** † 934.1/889.0** † 700/700** 115-60 30 (50)
230-60 207 253 2 12 550/524** 800/800** † 914.8/889.0** † 700/600** 115-60 30 (50)
460-60 414 506 1 6 489 600 1475.2 671.2 600 600 115-60 30 (50)
575-60 518 633 1 6 393 500 1181.9 538.9 450 450 115-60 30 (50)
380-60 342 418 1 6 592 700 1661.6 772.6 700 700 230-60 15 (25)
370B
208/230-60 187 253 2 12 400.6/418** 600/500** † 634.8/743.0** † 500/600** 115-60 30
230-60 207 253 1 6 700.3 1000 † 1065.0 † 800 115-60 30
460-60 414 506 1 3 342.1 450 1328.0 524.0 400 400 115-60 30
575-60 518 633 1 3 274.5 350 1063.7 420.7 350 350 115-60 30
380-60 342 418 1 6 412.9 500 1482.6 593.6 500 500 230-60 15
373A, 393A,
478A, 503A/B
208/230-60 187 253 2 12 752/577** 1000/800** † 1077.4/814.6** † 1000/700** 115-60 30 (50)
230-60 207 253 2 12 681/545** 800/700** † 1045.6/814.6** † 800/700** 115-60 30 (50)
460-60 414 506 1 6 566 700 1551.5 747.5 700 700 115-60 30 (50)
575-60 518 633 1 6 455 500 1243.8 600.8 500 500 115-60 30 (50)
380-60 342 418 1 6 681 800 1751.0 862.0 800 800 230-60 15 (25)
390A,
415A, 525A/B
208/230-60 187 253 2 12 753/594** 1000/800** † 1077.7/918.2** † 1000/700** 115-60 30 (50)
230-60 207 253 2 12 681/553** 800/800** † 1045.6/918.2** † 800/700** 115-60 30 (50)
460-60 414 506 1 6 567 700 1553.2 749.2 700 700 115-60 30 (50)
575-60 518 633 1 6 454 500 1243.6 600.6 500 500 115-60 30 (50)
380-60 342 418 1 6 685 800 1754.6 865.6 800 800 230-60 15 (25)
390B
208/230-60 187 253 1 6 657.6 800 † 895.6 † 800 115-60 30
230-60 207 253 1 6 603.8 800 † 873.8 † 700 115-60 30
460-60 414 506 1 3 295.9 400 1060.4 431.4 350 350 115-60 30
575-60 518 633 1 3 236.8 300 849.3 346.3 300 300 115-60 30
380-60 342 418 1 3 356.3 500 1185.8 489.8 400 400 230-60 15
415B
208/230-60 187 253 2 12 459.8/418** 700/700** † 697.8/743.0** † 600/600** 115-60 30
230-60 207 253 1 6 743.9 1000 † 1108.6 † 1000 115-60 30
460-60 414 506 1 3 363.9 500 1349.8 545.8 450 450 115-60 30
575-60 518 633 1 3 291.2 400 1080.4 437.4 350 350 115-60 30
380-60 342 418 1 6 438.5 600 1508.2 619.2 500 500 230-60 15
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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