Carrier AIR COOLED SPLIT SYSTEM 38AQS008 Installation And Service Instructions Manual page 7

UNIT NOMINAL VOLTAGE
38AQS (V-Ph-Hz)
208/230-3-60
460-3-60
008
220-3-50
400-3-50
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
Table 4 — Electrical Data
VOLTAGE RANGE COMPRESSOR
Min Max RLA
187 254 31.5
414 508 15.7
198 242 39.7
360 440 19.9
OFM POWER SUPPLY
MAX FUSE OR
LRA FLA MCA
HACR BRKR AMPS
160 3.1 42.5
80 1.4 21.0
198 3.1 52.7
99 1.4 26.3
Example: Supply voltage is 460-3-60.
(AB) 457 452 = 5 v
(BC) 464 457 = 7 v
(AC) 457 455 = 2 v
Maximum deviation is 7 v.
Determine percent voltage imbalance
% Voltage Imbalance = 100
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.
7
MINIMUM DISCONNECT
FLA
50 45
25 25
70 55
35 30
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
7
457
= 1.53%
LRA
177
89
205
106