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Table 2C — Electrical Data (Units With Convenience Outlet) (558F090, 102, 120, 150) (cont)
558F
NOMINAL
IFM
UNIT
V-Ph-Hz
TYPE
SIZE
Std
208/230-3-60
Alt
High
Std
120
Alt
460-3-60
High
Std
575-3-60
Alt
High
LEGEND
FLA
— Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM
— Indoor (Evaporator) Fan Motor
LRA
— Locked Rotor Amps
MCA
— Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC
— National Electrical Code
OFM
— Outdoor (Condenser) Fan Motor
RLA
— Rated Load Amps
*Used to determine minimum disconnect per NEC.
†Fuse or HACR circuit breaker per NEC.
**Fuse only.
††Compressor no. 1 is shown in table.
208/230-3-60: Compressor no. 2 RLA is 14.1 amps and LRA is 105 amps.
460-3-60: Compressor no. 2 RLA is 7.1 amps and LRA is 55 amps.
575-3-60: Compressor no. 2 RLA is 6.4 amps and LRA is 40 amps.
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. 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
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.
7
% Voltage Imbalance = 100 x
457
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.
All manuals and user guides at all-guides.com
VOLTAGE
COMPRESSOR
RANGE
(ea)
Min
Max
RLA
LRA
Qty
187
254
15.8
130.0
2
414
508
7.9
64.0
2
518
632
6.6
52.0
2
452 + 464 + 455
3
1371
=
3
= 457
ELECTRIC
OFM
HEAT
(ea)
IFM
FLA
Nominal
Hp
FLA
kW
—
7.8/10.4
12.0/16.0
5.8
24.0/32.0
31.8/42.4
37.6/50.0
104.2/120.3
—
7.8/10.4
12.0/16.0
1
/
1.4
7.5
24.0/32.0
4
31.8/42.4
37.6/50.0
104.2/120.3
—
7.8/10.4
12.0/16.0
15.0
24.0/32.0
31.8/42.4
37.6/50.0
104.2/120.3
—
16.5
27.8
2.6
33.0
41.7
50.0
—
16.5
27.8
1
/
0.7
3.4
33.0
4
41.7
50.0
—
16.5
27.8
7.4
33.0
41.7
50.0
—
17.0
2.6
34.0
51.0
—
17.0
1
/
0.7
3.4
4
34.0
51.0
—
17.0
7.4
34.0
51.0
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric
utility company immediately.
3. For units with power exhaust: If a single power source is to be used, size wire to include
power exhaust MCA and MOCP. Check MCA and MOCP when power exhaust is powered
through the unit (must be in accordance with NEC and/or local codes). Determine the
new MCA including the power exhaust using the following formula:
MCA New = MCA unit only + MCA of Power Exhaust
For example, using a 558FPX091000 unit with MCA = 40.1 and MOCP = 45, with
CRPWREXH030A01 power exhaust.
MCA New = 40.1 amps + 1.6 amps = 41.7 amps
If the new MCA does not exceed the published MOCP, then MOCP would not change.
The MOCP in this example is 45 amps, the MCA New is below 45, therefore the MOCP is
acceptable. If "MCA New" is larger than the published MOCP, raise the MOCP to the next
larger size. For separate power, the MOCP for the power exhaust will be 15 amps per
NEC.
POWER EXHAUST
PART NO.
CRPWREXH021A01
CRPWREXH022A01
CRPWREXH023A01
CRPWREXH028A01
CRPWREXH029A01
CRPWREXH030A01
4. Determine heater capacity using multiplication factors table below:
HEATER
RATING
200
VOLTAGE
240
0.694 0.751 0.918 1.000
480
—
600
—
NOTE: The following equation converts kW of heat energy to Btuh: kW x 3.412 = Btuh.
EXAMPLE: 32.0 kW (at 240 v) heater on 208 v
= 32.0 (.751 mult factor)
= 24.0 kW capacity at 208 v
—
—
17
POWER
SUPPLY
FLA
MCA
MOCP†
—
49.1/ 49.1
60/ 60
21.7/ 25.0
49.1/ 49.1
60/ 60
33.4/ 38.5
53.9/ 60.4
60/ 70**
66.7/ 77.0
95.6/108.5
100/110**
88.4/102.0
122.7/139.8
125/150**
142.5/132.5
150/150**
—
50.8/ 50.8
60/ 60
21.7/ 25.0
50.8/ 50.8
60/ 60
33.4/ 38.5
56.1/ 62.5
60/ 60
66.7/ 77.0
97.8/110.6
100/125**
88.4/102.0
124.9/141.9
125/150**
144.7/134.7
150/150**
—
58.3/ 58.3
70/ 70**
21.7/ 25.0
58.3/ 58.3
70/ 70**
33.4/ 38.5
65.4/ 71.9
60/ 80**
66.7/ 77.0
107.1/120.0
110/125**
88.4/102.0
134.2/151.3
150/175**
154.0/144.0
175/175**
—
23.7
30
19.8
30.7
30
33.4
47.8
50
39.7
55.5
60
50.2
68.6
70**
60.1
65.6
70**
—
24.5
30
19.8
31.7
30
33.4
48.8
50
39.7
56.6
60
50.2
69.7
70**
60.1
66.6
70**
—
28.5
30
19.8
36.7
35
33.4
53.8
60
39.7
61.5
70**
50.2
74.6
80**
60.1
71.6
80**
—
20.6
25
17.1
26.6
25
34.1
47.9
50
51.2
56.0
60
—
21.2
25
17.1
27.4
30
34.1
48.8
50
51.2
56.8
60
—
24.4
30
17.1
31.4
35
34.1
52.7
60
51.2
60.8
70**
MCA
MCA
MCA
(230 v)
(460 v)
(575 v)
N/A
0.9
3.3
N/A
N/A
1.8
1.7
N/A
N/A
1.0
1.6
N/A
ACTUAL HEATER VOLTAGE
208
230
240
380
440
460
—
—
—
—
—
—
0.626 0.840 0.918 1.000
—
—
—
—
—
—
DISCONNECT
SIZE*
FLA
LRA
50/ 50
50/ 50
51/ 56
311/311
89/101
114/130
132/151
52/ 52
52/ 52
53/ 58
330/330
91/103
116/131
134/152
61/ 61
61/ 61
61/ 67
378/378
99/111
124/140
143/161
24
28
44
154
51
63
75
25
29
45
194
52
64
76
30
34
49
188
57
69
80
21
24
110
44
63
21
25
141
44
64
25
28
136
48
68
MOCP
(for separate
power source)
N/A
15
1.32
15
N/A
15
0.68
15
N/A
15
0.64
15
480
550
575
600
—
—
—
—
—
—
—
—
0.840 0.918 1.000
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