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VOLTAGE
VOLTAGE
RANGE
UNIT
(3 Ph,
542J
60 Hz)
Min
Max
RLA LRA RLA LRA
208/230
187
253
39.7
150
460
414
508
19.9
208/230
187
253
28.2
180
460
414
508
14.1
LEGEND
FLA
— Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
LRA
— Locked Rotor Amps
MCA
— Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC
— National Electrical Code
RLA
— Rated Load Amps
*Heater capacity (kW) is based on heater voltage of 208 v, 240 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. This is the maximum size permissible; smaller
fuse size may be used where conditions permit.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equip-
ment (refer to NEC Articles 430 and 440), the overcurrent protective device for
the unit shall be fuse or HACR breaker. The Canadian units may be fuse or
circuit breaker.
2. MCA calculation for units with electric heaters over 50 kW
= (1.25 x IFM amps) + (1.00 x heater FLA).
3. 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
max voltage deviation from average voltage
= 100 x
average voltage
Table 2 — Electrical Data
OUTDOOR
COMPRESSOR
FAN
No. 1
No. 2
MOTOR
FLA
Qty
(ea)
228
—
—
3
1.7
114
—
—
3
0.8
160
28.2
160
3
1.7
80
14.1
80
3
0.8
INDOOR FAN
POWER
ELECTRIC HEAT*
MOTOR
EXHAUST
Hp
FLA
FLA LRA
FLA
−/−
39/ 45
—
—
72/ 82
117/135
3.7 10.5/10.5
−/−
39/ 45
4.6
18.8
72/ 82
117/135
—
18
—
—
39
66
3.7
4.8
—
18
2.3
6.0
39
66
—/—
—
—
72/ 82
117/135
5
15.8/15.8
—/—
4.6
18.8
72/ 82
117/135
—
—
—
39
66
5
7.9
—
2.3
6.0
39
66
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
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
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.
—10—
POWER SUPPLY
kW
MCA
MOCP†
−/−
65/ 65
100/100
14/19
114/122
125/150
26/34
155/168
175/175
42/56
211/200
225/225
147/167
−/−
70/ 70
100/100
14/19
119/126
125/150
26/34
159/173
175/175
100/112
42/56
216/205
225/225
152/173
—
32
50
15
54
60
32
81
90
55
98
110
—
34
50
15
57
70
32
83
90
55
100
110
—/—
84/ 84
110/110
26/34
174/187
175/200
101/112
42/56
231/219
250/225
153/173
—/—
89/ 89
110/110
26/34
179/191
200/200
106/118
42/56
235/224
250/225
158/179
—
42
50
32
91
100
55
108
110
—
44
50
32
93
100
55
110
125
452 + 464 + 455
3
1371
=
3
= 457
7
457
= 1.53%
DISCONNECT
SIZING
RLA
LRA
64/ 64
64/ 64
387/387
94/107
69/ 69
69/ 69
406/406
31
31
189
50
82
34
34
195
53
84
89/ 89
499/485
94/ 94
518/504
44
54
238
85
47
57
244
88
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