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Table 4 — Electrical Data
UNIT
575A
NOMINAL VOLTAGE
(V-Ph-Hz)
VOLTAGE RANGE COMPRESSOR OFM POWER SUPPLY MINIMUM DISCONNECT
Min Max RLA LRA FLA MCA
MAX FUSE OR
HACR BRKR AMPS
FLA LRA
090
208/230-3-60 187 254 31.5 160 3.1 42.5 50 45 177
460-3-60 414 508 15.7 80 1.4 21.0 25 25 89
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
NEC — National Electrical Code
OFM — Outdoor Fan Motor
RLA — Rated Load Amps
NOTES:
1. In compliance with NEC requirements for multimotor and combina-
tion load equipment (refer to NEC Articles 430 and 440), the over-
current protective device for the unit shall be fuse or HACR 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
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
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
(AB) 457 Ϫ 452=5v
(BC) 464 Ϫ 457=7v
(AC) 457 Ϫ 455=2v
Maximum deviation is 7 v.
Determine percent voltage imbalance
7
% Voltage Imbalance = 100
457
= 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.
Table 5 — Accessory Electric Heater Data
UNIT
524A-H
NOMINAL kW V-PH-HZ
HEATER
PART NO.
HEATER
AMPS
MCA* MOCP*
090
5
240-3-60 CAELHEAT001A00 12.0 25.6 30
480-3-60 CAELHEAT002A00 6.0 12.3 15
10
240-3-60 CAELHEAT004A00 24.1 40.7 50
480-3-60 CAELHEAT005A00 12.0 19.8 25
15
240-3-60 CAELHEAT007A00 36.0 55.7 80
480-3-60 CAELHEAT008A00 18.0 27.4 40
25
240-3-60 CAELHEAT010A00 60.1 85.8 125
480-3-60 CAELHEAT011A00 30.1 42.4 60
35
240-3-60 CAELHEAT013A00 84.0 115.8 175
480-3-60 CAELHEAT014A00 42.1 57.4 80
LEGEND
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection (Amps)
*Sizes shown are for single-point connection of electric heat accessory
and air handler.
NOTES:
1. MCA and MOCP values apply to both standard and alternate factory-
supplied motors.
2. Electrical resistance heaters are rated at 240 v or 480 v. To deter-
mine heater capacity (kW) at unit nameplate voltage, multiply 240-v
or 480-v capacity by multipliers found in table below.
HEATER RATING
VOLTAGE
ACTUAL SITE VOLTAGE
200 208 230 240 400 440 460 480
240 .694 .751 .918 1 — — — —
480 — — — — .694 .840 .918 1
NOTE: The following equation converts kW of heat energy to Btuh:
kW x 3,412 = Btuh.
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