Carrier AIR COOLED SPLIT SYSTEM 38AQS008 - Manual (Page 7)

Table 4 — Electrical Data
UNIT
38AQS
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
008
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
220-3-50 198 242 39.7 198 3.1 52.7 70 55 205
400-3-50 360 440 19.9 99 1.4 26.3 35 30 106
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
LRA
— Locked Rotor Amps
MCA — Minimum Circuit Amps
NEC — National Electrical Code (U.S.A.)
OFM — Outdoor Fan Motor
RLA — Rated Load Amps
(60 Hz Only) (60 Hz Only)
NOTES:
1. In compliance with NEC requirements for multimotor and combi-
nation load equipment (refer to NEC Articles 430 and 440), the
overcurrent 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 volt-
age 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 = 5 v
(BC) 464 Ϫ 457 = 7 v
(AC) 457 Ϫ 455 = 2 v
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.
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