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Table 2A — Electrical Data (Units Without Convenience Outlet) (558F090, 102, 120, 150) (cont)
LEGEND
*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
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.
= 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.
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.
4. Determine heater capacity using multiplication factors table below:
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
558F
UNIT
SIZE
NOMINAL
V-Ph-Hz
IFM
TYPE
VOLTAGE
RANGE
COMPRESSOR
(ea)
OFM
(ea)
IFM
FLA
ELECTRIC
HEAT
POWER
SUPPLY
DISCONNECT
SIZE*
Min Max RLA LRA Qty Hp FLA
Nominal
kW
FLA MCA MOCP† FLA LRA
150
208/230-3-60
Std
187 254 23.0 146.0 2
1
/
4
1.4
10.6
— — 65.2/ 65.2 80/ 80** 68/ 68
383/383
7.8/10.4 21.7/ 25.0 65.2/ 65.2 80/ 80** 68/ 68
12.0/16.0 33.4/ 38.5 65.2/ 65.2 70/ 70** 68/ 68
24.0/32.0 66.7/ 77.0 96.6/109.5 100/110** 89/101
31.8/42.4 88.4/102.0 123.7/140.8 125/150** 114/129
37.6/50.0 104.2/120.3 143.5/133.5 150/150** 132/151
Alt 15.0
— — 69.6/ 69.6 80/ 80** 73/ 73
406/406
7.8/10.4 21.7/ 25.0 69.6/ 69.6 80/ 80** 73/ 73
12.0/16.0 33.4/ 38.5 69.6/ 69.6 80/ 80** 73/ 73
24.0/32.0 66.7/ 77.0 102.1/115.0 110/125** 94/106
31.8/42.4 88.4/102.0 129.2/146.3 150/150** 119/135
37.6/50.0 104.2/120.3 149.0/139.0 150/175** 137/156
460-3-60
Std
414 508 10.4 73.0 2
1
/
4
0.7
4.8
— — 29.6 40 31
192
16.5 19.8 30.8 40 31
27.8 33.4 47.8 50 44
33.0 39.7 55.6 60 51
41.7 50.2 68.7 70** 63
50.0 60.1 66.1 80** 75
Alt 7.4
— — 32.2 45 34
203
16.5 19.8 34.1 45 34
27.8 33.4 51.0 60 47
33.0 39.7 58.9 60 54
41.7 50.2 71.9 80** 66
50.0 60.1 69.4 80** 78
575-3-60
Std
518 632 8.3 58.4 2
1
/
4
0.7
4.8
— — 23.6 30 25
154
17.0 17.1 26.1 30 25
34.0 34.1 47.5 50 44
51.0 51.2 56.0 60 63
Alt 7.4
— — 25.7 30 27
163
17.0 17.1 28.7 35 27
34.0 34.1 50.1 60 46
51.0
51.2 58.6 70** 66
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
= 100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
452 + 464 + 455
3
=
1371
3
% Voltage Imbalance = 100 x
7
457
POWER EXHAUST
PART NO.
MCA
(230 v)
MCA
(460 v)
MCA
(575 v)
MOCP
(for separate
power source)
CRPWREXH021A01 N/A 0.9 N/A 15
CRPWREXH022A01 3.3 N/A 1.32 15
CRPWREXH023A01 N/A 1.8 N/A 15
CRPWREXH028A01 1.7 N/A 0.68 15
CRPWREXH029A01 N/A 1.0 N/A 15
CRPWREXH030A01 1.6 N/A 0.64 15
HEATER
RATING
VOLTAGE
ACTUAL HEATER VOLTAGE
200 208 230 240 380 440 460 480 550 575 600
240 0.694 0.751 0.918 1.000 — — — — — — —
480 — — — — 0.626 0.840 0.918 1.000 — — —
600 — — — — — — — — 0.840 0.918 1.000