56
Table 7A — Electrical Data Reduced Ambient 115 F Data (cont)
LEGEND
*Wye-delta start is standard. Across-the-line start is not available.
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
080
208/230-60 187 253 1 6 384.8 500 * 556.2 * 450 115-60 30
230-60 207 253 1 3 352.8 450 * 543.4 * 400 115-60 30
460-60 414 506 1 3 172.5 225 664.2 267.2 200 200 115-60 30
575-60 518 633 1 3 138.9 175 552.3 215.3 175 175 115-60 30
380-60 342 418 1 3 208.8 250 742.4 304.4 250 250 230-60 15
083
208/230-60 187 253 1 6 396.2 500 * 577.0 * 450 115-60 30
230-60 207 253 1 3 366.9 500 * 565.4 * 450 115-60 30
460-60 414 506 1 3 177.5 225 673.2 276.2 200 200 115-60 30
575-60 518 633 1 3 142.9 175 559.5 222.5 175 175 115-60 30
380-60 342 418 1 3 213.4 250 752.4 314.4 250 250 230-60 15
090
208/230-60 187 253 1 6 434.5 600 * 622.2 * 500 115-60 30
230-60 207 253 1 6 397.7 500 * 609.4 * 450 115-60 30
460-60 414 506 1 3 194.8 250 769.2 300.2 225 225 115-60 30
575-60 518 633 1 3 158.1 225 616.3 241.3 200 200 115-60 30
380-60 342 418 1 3 236.0 300 858.4 340.4 300 300 230-60 15
093
208/230-60 187 253 1 6 431.6 600 * 643.0 * 500 115-60 30
230-60 207 253 1 6 398.9 500 * 631.4 * 450 115-60 30
460-60 414 506 1 3 193.5 250 778.2 309.2 225 225 115-60 30
575-60 518 633 1 3 155.7 200 623.5 248.5 175 175 115-60 30
380-60 342 418 1 3 232.7 300 868.4 350.4 300 300 230-60 15
106
208/230-60 187 253 1 6 524.5 700 * 736.4 * 600 115-60 30
230-60 207 253 1 6 481.4 700 * 723.6 * 600 115-60 30
460-60 414 506 1 3 234.7 300 916.8 355.8 300 300 115-60 30
575-60 518 633 1 3 189.3 250 734.7 285.7 225 250 115-60 30
380-60 342 418 1 3 284.6 400 1022.2 402.2 350 350 230-60 15
108
208/230-60 518 633 1 6 488.3 600 * 747.7 * 600 115-60 30
230-60 342 418 1 6 450.2 600 * 734.2 * 500 115-60 30
460-60 207 253 1 3 219.1 300 922.1 361.1 250 250 115-60 30
575-60 342 440 1 3 176.2 250 738.6 289.6 200 200 115-60 30
380-60 187 253 1 3 263.8 350 1028.2 408.2 300 300 230-60 15
114
208/230-60 187 253 1 6 550.2 700 * 762.1 * 700 115-60 30
230-60 207 253 1 6 504.5 700 * 746.7 * 600 115-60 30
460-60 414 506 1 3 246.3 350 928.4 367.4 300 300 115-60 30
575-60 518 633 1 3 198.3 250 743.7 294.7 225 225 115-60 30
380-60 342 418 1 3 298.7 400 1036.3 416.3 350 350 230-60 15
118
208/230-60 187 253 1 6 542.7 700 * 802.1 * 600 115-60 30
230-60 207 253 1 6 502.2 600 * 786.2 * 600 115-60 30
460-60 414 506 1 3 243.1 300 946.1 385.1 300 300 115-60 30
575-60 518 633 1 3 195.8 250 758.2 309.2 225 225 115-60 30
380-60 342 418 1 3 292.4 400 1056.8 436.8 350 350 230-60 15
125
208/230-60 187 253 1 6 619.1 800 * 857.1 * 700 115-60 30
230-60 207 253 1 6 567.9 800 * 837.9 * 700 115-60 30
460-60 414 506 1 3 278.0 400 1042.5 413.5 350 350 115-60 30
575-60 518 633 1 3 222.7 300 835.2 332.2 250 250 115-60 30
380-60 342 418 1 3 335.8 450 1165.3 469.3 400 400 230-60 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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