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Table 2A — Electrical Data (Units Without Convenience Outlet) (558F090, 102, 120, 150) (cont)
558F
NOMINAL
IFM
UNIT
V-Ph-Hz
TYPE
SIZE
Min
Std
208/230-3-60
Alt
187
High
Std
120
Alt
460-3-60
414
High
Std
575-3-60
Alt
518
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)
Max
RLA
LRA
Qty
254
15.8
130.0
2
508
7.9
64.0
2
632
6.6
52.0
2
452 + 464 + 455
3
1371
=
3
= 457
OFM
ELECTRIC
(ea)
HEAT
IFM
FLA
Nominal
Hp
FLA
kW
—
7.8/10.4
21.7/ 25.0
12.0/16.0
33.4/ 38.5
5.8
24.0/32.0
66.7/ 77.0
31.8/42.4
88.4/102.0
37.6/50.0
104.2/120.3
—
7.8/10.4
21.7/ 25.0
12.0/16.0
33.4/ 38.5
1
/
1.4
7.5
4
24.0/32.0
66.7/ 77.0
31.8/42.4
88.4/102.0
37.6/50.0
104.2/120.3
—
7.8/10.4
21.7/ 25.0
12.0/16.0
33.4/ 38.5
15.0
24.0/32.0
66.7/ 77.0
31.8/42.4
88.4/102.0
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
4
33.0
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
—
—
11
POWER
SUPPLY
FLA
MCA
MOCP†
—
43.1/ 43.1
50/ 50
43.1/ 43.1
50/ 50
48.9/ 55.4
60/ 60
90.6/103.5
100/110**
117.7/134.8
125/150**
137.5/127.5
150/150**
—
44.8/ 44.8
50/ 50
44.8/ 44.8
50/ 50
51.1/ 57.5
60/ 60
92.8/105.6
100/110**
119.9/136.9
125/150**
139.7/129.7
150/150**
—
52.3/ 52.3
60/ 60
52.3/ 52.3
60/ 60
60.4/ 66.9
60/ 80**
102.1/115.0
110/125**
129.2/146.3
150/150**
149.0/139.0
150/175**
—
21.0
25
19.8
28.1
30
33.4
45.0
50
39.7
52.9
60
50.2
65.9
70**
60.1
63.4
70**
—
21.8
25
19.8
29.1
30
33.4
46.0
50
39.7
53.9
60
50.2
66.9
70**
60.1
64.4
70**
—
25.8
30
19.8
34.1
35
33.4
51.0
60
39.7
58.9
60
50.2
71.9
80**
60.1
69.4
80**
—
17.9
20
17.1
23.9
25
34.1
45.3
50
51.2
53.8
60
—
18.5
25
17.1
24.7
25
34.1
46.1
50
51.2
54.6
60
—
21.7
25
17.1
28.7
35
34.1
50.1
60
51.2
58.6
70**
MCA
MCA
MCA
(230 v)
(460 v)
(575 v)
N/A
0.9
3.3
N/A
1.32
N/A
1.8
1.7
N/A
0.68
N/A
1.0
1.6
N/A
0.64
ACTUAL HEATER VOLTAGE
208
230
240
380
440
460
—
—
—
—
—
—
0.626 0.840 0.918 1.000
—
—
—
—
—
—
DISCONNECT
SIZE*
FLA
LRA
45/ 45
45/ 45
45/ 51
307/307
83/ 95
108/124
127/145
47/ 47
47/ 47
47/ 53
326/326
85/ 97
110/126
128/147
56/ 56
56/ 56
56/ 62
374/374
94/106
119/135
137/156
22
26
41
152
49
61
72
23
27
42
191
50
62
73
27
31
47
185
54
66
78
19
22
107
42
61
19
23
139
42
62
23
26
134
46
66
MOCP
(for separate
power source)
N/A
15
15
N/A
15
15
N/A
15
15
480
550
575
600
—
—
—
—
—
—
—
—
0.840 0.918 1.000
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