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Table 3B — Electrical Data (Units With Electrical Convenience Outlet) (cont)
LEGEND
*Heaters are field installed only.
†Used to determine minimum disconnect size per NEC.
**Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v, and 575 v. If
power distribution voltage to unit varies from rated heater voltage, heater kW will vary
accordingly.
††Fuse or HACR circuit breaker.
***Optionaldisconnect switch is unavailable.
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.
2. Unbalanced 3-PhaseSupply 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 = 464v
AC = 455 v
= 457
Determine maximum deviation from average voltage.
(AB)457–452=5v
(BC) 464 –457 = 7v
(AC) 457 – 455= 2 v
Maximum deviation is 7 v.
Determine percentof voltage imbalance.
%Voltage Imbalance =100 x
=1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.
50TFQ
UNIT SIZE
NOMINAL
V-PH-Hz
IFM
TYPE
VOLTAGE
RANGE
COMPRESSOR
(each)
OFM
FLA
IFM
FLA
ELECTRIC
HEAT*
POWER SUPPLY
DISCONNECT
SIZE†
Min Max RLA LRA
Nominal
kW**
FLA MCA MOCP FLA LRA
012
(10 Tons)
208/230-3-60
STD 187 254 17.2 124.0 1.4 5.8
— — 52.1/ 52.1 60/ 60†† 55/ 55 300/300
7.8/10.4 21.7/ 25.0 79.2/ 83.4 80/ 90 80/ 84 322/325***
12.0/16.0 33.3/ 38.5 93.7/100.2 100/110 93/ 99 333/338***
24.0/32.0 66.6/ 77.0 135.4/148.4 150/150 132/144 366/377***
31.8/42.4 88.3/102.0 162.5/179.6 175/200 157/172 388/402***
37.6/50.0 104.4/120.3 182.6/172.4 200/200 175/193 404/420***
ALT 187 254 17.2 124.0 1.4 7.5
— — 53.8/ 53.8 60/ 60†† 57/ 57 319/319
7.8/10.4 21.7/ 25.0 80.9/ 85.1 90/ 90 82/ 86 341/344***
12.0/16.0 33.3/ 38.5 95.4/101.9 100/110 95/101 352/357***
24.0/32.0 66.6/ 77.0 137.1/150.1 150/175 134/145 385/396***
31.8/42.4 88.3/102.0 164.2/181.3 175/200 158/174 407/421***
37.6/50.0 104.4/120.3 184.3/174.1 200/200 177/195 423/439***
HIGH-STATIC 187 254 17.2 124.0 1.4 15.0
— — 61.3/ 61.3 70/ 70 66/ 66 367/367
7.8/10.4 21.7/ 25.0 88.4/ 92.6 90/100 91/ 94 389/392***
12.0/16.0 33.3/ 38.5 102.9/109.4 110/110 104/110 400/405***
24.0/32.0 66.6/ 77.0 144.6/157.6 150/175 142/154 433/444***
31.8/42.4 88.3/102.0 171.7/188.8 175/200 167/183 455/459***
37.6/50.0 104.4/120.3 191.8/181.6 200/200 186/204 471/487***
460-3-60
STD 414 508 8.6 59.6 0.7 2.6
— — 25.5 30†† 27 145
16.5 19.8 50.3 60†† 50 165
27.8 33.4 67.3 70 65 178
33.0 39.7 75.2 80 73 185
41.7 50.2 88.3 90 85 195***
50.0 60.1 85.6 90 96 205***
ALT 414 508 8.6 59.6 0.7 3.4
— — 26.3 30†† 28 185
16.5 19.8 51.1 60†† 51 204
27.8 33.4 68.1 70 66 218
33.0 39.7 76.0 80 73 224
41.7 50.2 89.1 90 86 235***
50.0 60.1 86.4 90 97 245***
HIGH-STATIC 414 508 8.6 59.6 0.7 7.4
— — 30.3 35†† 32 179
16.5 19.8 55.1 60†† 55 198
27.8 33.4 72.1 80 71 212
33.0 39.7 80.0 80 78 218
41.7 50.2 93.1 100 90 229***
50.0 60.1 90.4 100 102 239***
575-3-60
STD 518 632 6.9 49.4 0.7 2.6
— — 20.5 25†† 22 120
17.0 17.1 41.8 45†† 41 137
34.0 34.1 63.1 70 61 154
51.0 51.2 71.7 80 80 171***
ALT 518 632 6.9 49.4 0.7 3.4
— — 21.1 25†† 22 151
17.0 17.1 42.5 45†† 42 168
34.0 34.1 63.7 70 62 185
51.0 51.2 72.3 80 81 202***
HIGH-STATIC 518 632 6.9 49.4 0.7 7.4
— — 24.3 25†† 26 146
17.0 17.1 45.7 50†† 46 163
34.0 34.1 66.9 70 65 180
51.0 51.2 75.5 80 85 198***
FLA — FullLoad Amps
HACR — Heating, Air Conditioningand Refrigeration
IFM — Indoor Fan Motor
LRA — Locked RotorAmps
MCA — Minimum Circuit Amps
MOCP — Maximum OvercurrentProtection
NEC — National Electrical Code
OFM — Outdoor Fan Motor
RLA — Rated Load Amps
= 100 x
max voltage deviation fromaverage voltage
average voltage
AverageVoltage =
452 + 464+ 455
3
=
1371
3
IMPORTANT: If the supplyvoltage phase imbalance is more than 2%, contact your local
electric utility company immediately.
7
457