UNIT
SIZE
38AUQ
NOMINAL
POWER
SUPPLY
Table 8 - Electrical Data -- 38AUQ*07-12 60 Hz Units
VOLTAGE RANGE COMPRESSOR
OFM
NO C.O. or UNPWRD C.O.
POWER SUPPLY
DISCONNECT
SIZE
FUSE or
FLA
V-Ph-Hz Min Max RLA LRA Qty (ea) MCA HACR FLA LRA
BRKR
208/260-3-60 187 256 19.0 126 2 1.5 26.8/26.8 45/45 25/25 129/129
*07 460-3-60 414 506 9.7 62 2 0.8 16.7 20 13 66
575-6-60 518 636 7.4 50 2 0.7 10.7 15 10 54
208/260-3-60 187 256 25.2 164 2 1.5 34.5/34.5 50/50 32/62 170/170
*08 460-6-60 414 506 12.7 1O0 2 0.8 17.5 30 16 104
575-6-60 518 636 11.0 78 2 0.7 15.2 25 14 82
208/260-3-60 187 256 30.8 225 2 1.5 41.5/41.5 60/60 39/39 261/261
"12 460-6-60 414 506 16.7 114 2 0.8 22.5 30 21 118
575-6-60 518 636 12.8 80 2 0.7 17.4 30 16 84
NOMINAL
POWER
SUPPLY
UNIT
SIZE
38AU
VOLTAGE RANGE COMPRESSOR
OFM
w/PWRD C.O.
POWER SUPPLY
DISCONNECT
SIZE
FUSE or
FLA
V-Ph-Hz Min Max RLA LRA Qty (ea) MCA HACR FLA LRA
BRKR
208/230-3-60 187 253 19.0 123 2 1.5 31.6/31.6 50/50 31/31 134/134
*07 460-3-60 414 506 9.7 62 2 0.8 15.9 25 16 68
575-6-60 518 636 7.4 50 2 0.7 12.4 15 12 56
208/260-3-60 187 256 25.2 164 2 1.5 39.3/39.3 60/60 38/38 175/175
*08 460-6-60 414 506 12.7 1O0 2 0.8 19.7 30 19 106
575-3-60 518 636 11.0 78 2 0.7 16.9 25 16 84
208/260-3-60 187 256 30.8 225 2 1.5 46.3/46.3 60/60 44/44 266/266
"12 460- 3- 60 414 506 16.7 114 2 0.8 24.7 30 24 120
575-6-60 518 636 12.8 80 2 0.7 19.1 30 18 86
Legend and Notes for Table 8
LEGEND:
BRKR - Circuit breaker Q [mS
CO - Convenient outlet
FLA - Full Load Amps C
LRA - Locked Rotor Amps
MCA - Minimum Circuit Amps
Protection
NEC - National Electrical Code
PWRD CO - Powered convenient outlet
RLA - Rated Load Amps
UNPWR CO - Unpowered convenient outlet
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. Canadian units may be fuse or circuit
breaker.
2. The MCA values are calculated in accordance with The NEC.
Article 440.
3. Motor RLA and LRA values are established in accordance
with Underwriters' Laboratories (UL). Standard 1995.
4. The 575-v units are UL, Canada-listed only.
5. 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 de-
termine the percentage of voltage imbalance.
Example: Supply voltage is 260-3-60
max voltage deviation from average voltage
% Voltage imbalance = 100 x
average voltage
AB = 224 v
BC = 231 v
AC = 226 v
(224 + 231 + 226)
Average Voltage =
3
681
3
= 227
Determine maximum deviation from average voltage.
(AB) 227 - 224 = 3 v
(BC) 261 - 227 = 4 v
(AC) 227- 226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
4
% Voltage imbalance = 100 x
227
= 1.76%
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.
16
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