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Table 5 — Electrical Data
LEGEND
*Fuse or HACR circuit breaker.
NOTES:
1. In compliance with NEC requirements for multimotor and combination
load equipment (refer to NEC Articles 430 and 440), the overcurrent pro-
tective device forthe unit shallbe fuse or HACRbreaker.Canadian units
maybefuseorcircuitbreaker.
2. 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 determine the percent
voltage imbalance.
% Voltage Imbalance
EXAMPLE: Supply voltage is 460-3-60.
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5v
(BC) 464 – 457 = 7v
(AC) 457 – 455 = 2v
Maximum deviation is 7 v.
Determine percent voltage imbalance.
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum
allowable 2%.
UNIT
48TM
NOMINAL
VOLTAGE
(3 Ph, 60 Hz)
VOLTAGE
RANGE
COMPRESSOR
OFM IFM
POWER
EXHAUST
COMBUSTION
FAN MOTOR
POWER
SUPPLY
No. 1 No. 1A No. 2
Min Max RLA LRA RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA FLA MCA MOCP*
016
208/230 187 253 32.1 195 — — 20.7 156 3 0.5 1.7 5.0 15.8/15.8
— — 0.57 82/82 110/110
4.6 18.8 0.57 86/86 110/110
460 414 508 16.4 95 — — 10 70 3 0.5 0.8 5.0 7.9
— — 0.30 41 50
2.3 6.0 0.30 43 50
575 518 633 12 80 — — 8.2 54 3 0.5 0.75 5.0 6.0
— — 0.57 31 40
2.1 4.8 0.57 34 40
020
208/230 187 253 30.1 225 — — 28.8 195 3 0.5 1.7 5.0 15.8/15.8
— — 0.57 87/87 110/110
4.6 18.8 0.57 92/92 110/110
460 414 508 15.5 114 — — 14.7 95 3 0.5 0.8 5.0 7.9
— — 0.30 44 50
2.3 6.0 0.30 47 60
575 518 632.5 12.1 80 — — 10.7 80 3 0.5 0.75 5.0 6.0
— — 0.57 34 40
2.1 4.8 0.57 36 40
025
208/230 187 253 42 239 — — 33.6 225 2 1 6.6 7.5 25.0/25.0
— — 0.57 124/124 150/150
4.6 18.8 0.57 129/129 150/150
460 414 508 19.2 125 — — 17.3 114 2 1 3.3 7.5 13.0
— — 0.30 61 80
2.3 6.0 0.30 63 80
575 518 633 13.8 80.0 — — 13.5 80.0 2 1.0 3.4 7.5 10.0
— — 0.57 48 60
2.1 4.8 0.57 50 60
028
208/230 187.2 253 20.7 156 20.7 156 47.1 245 6 0.5 1.7 10.0 28.0/28.0
— — 0.57 138/138 175/175
4.6 18.8 0.57 143/143 150/175
460 414 508 10 75 10 75 19.6 125 6 0.5 0.8 10.0 14.6
— — 0.30 64 80
2.3 6 0.30 66 80
575 517.5 632.5 8.2 54 8.2 54 15.8 100 6 0.5 0.8 10.0 13.0
— — 0.57 54 60
2.1 4.8 0.57 56 70
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum CircuitAmps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
OFM — Outdoor (Condenser) Fan Motor
RLA — RatedLoadAmps
= 100 x
max voltage deviation from average voltage
average voltage
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
452 + 464 + 455
3
=
1371
3
= 457
% Voltage Imbalance = 100 x
7
457
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.