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ELECTRICAL DATA (cont)
UNITS WITH ELECTRICAL CONVENIENCE OUTLET (cont)
LEGEND AND NOTES FOR ELECTRICAL DATA TABLES
LEGEND
*Used to determine minimum disconnect per NEC.
†Heater capacity (kW) is based on heater voltage of 208 v and 480 v. If
power distribution voltage to unit varies from rated heater voltage,
heater kW will vary accordingly.
**Fuse or HACR circuit breaker.
††Optional disconnect switch cannot be used.
***Units have 2 outdoor fan motors.
NOTES:
1. In compliance with NEC requirements for multimotor and combina-
tion load and equipment (refer to NEC Articles 430 and 440), the
overcurrent protective device for the unit shall be fuse or HACR
breaker.
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
of voltage imbalance.
% Voltage Imbalance
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
= 457
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
= 1.53%
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.
UNIT
549B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
COMPRESSOR OFM IFM
ELECTRIC
HEAT*
POWER
SUPPLY
MINIMUM UNIT
DISCONNECT
SIZE
Min Max RLA LRA FLA FLA kW† FLA MCA MOCP FLA LRA
090***
(7
1/
2
Tons)
208/230-3-60 187 254 12.4 88.0 1.4 7.5
—
/—
—
/—
43.0/ 43.0 45/ 45** 46/ 46 247/247
7.8/10.4 21.7/ 25.0 70.1/ 74.3 80/ 80 71/ 75 269/272
12.0/16.0 33.3/ 38.5 84.6/ 91.1 90/100 84/ 90 280/285††
18.6/24.8 51.6/ 59.7 107.5/117.6 110/125 105/115 298/307††
24.0/32.0 66.6/ 77.0 126.3/139.3 150/150 122/134 313/324††
31.8/42.4 88.3/102.0 153.4/170.5 175/175 147/163 335/349††
460-3-60 414 508 6.4 44.0 0.7 3.4
——21.4 25** 23 123
13.9 16.7 42.3 45** 42 140
16.5 19.8 46.1 50** 46 143
27.8 33.4 63.1 70 61 157
33.0 39.7 71.0 80 68 163
41.7 50.2 84.1 90 80 174††
120***
(10 Tons)
208/230-3-60 187 254 19.3 123.0 1.4 10.6
—
/—
—
/—
61.6/ 61.6 70/ 70 65/ 65 341/341
7.8/10.4 21.7/ 25.0 88.8/ 92.9 90/100 90/ 94 363/366††
12.0/16.0 33.3/ 38.5 103.3/109.6 110/110 104/110 375/380††
24.0/32.0 66.6/ 77.0 144.9/157.9 150/175 142/154 408/418††
31.8/42.4 88.3/102.0 172.0/189.1 175/200 167/183 430/443††
37.6/50.0 104.4/120.3 192.1/181.9 200/200 185/204 446/462††
460-3-60 414 508 10.0 62.0 0.7 4.8
——30.9 35** 33 172
16.5 19.8 55.6 60** 55 191
27.8 33.4 72.6 80 71 205
33.0 39.7 80.5 90 78 211
41.7 50.2 93.6 100 90 222††
50.0 60.1 91.0 100 102 232††
FLA —
Full Load Amps
HACR —
Heating, Air Conditioning and Refrigeration
IFM —
Indoor Fan Motor
LRA —
Locked Rotor Amps
MCA —
Minimum Circuit Amps
MOCP —
Maximum Overcurrent Protection
NEC —
National Electrical Code
OFM —
Outdoor Fan Motor
RLA —
Rated Load Amps
= 100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
452 + 464 + 455
3
=
1371
3
7
457
50TFQ004-012
549B036-120