Carrier 38AUZ User Manual
Page 13
13
Table 5 — Electrical Data — 38AUZ*07-14 60 Hz Units
LEGEND
UNIT
SIZE
38AU
FACTORY-
INSTALLED
OPTION
NOMINAL
VOLTAGE
VOLTAGE
RANGE*
COMPRESSOR
FAN MOTORS
(Qty 2)
POWER
SUPPLY
V-Ph-Hz
MIN
MAX
RLA
LRA
FLA (ea)
LRA (ea)
MCA
MOCP
Z*07
NONE OR DISCONNECT
CONVENIENCE OUTLET
208/230-3-60
187
253
19
123
1.5
3.7
25.2
45
NONE OR DISCONNECT
CONVENIENCE OUTLET
460-3-60
414
506
9.7
62
0.8
1.9
12.9
20
NONE OR DISCONNECT
CONVENIENCE OUTLET
575-3-60
518
633
7.4
50
0.6
1.6
9.9
15
Z*08
NONE OR DISCONNECT
CONVENIENCE OUTLET
208/230-3-60
187
253
25
164
1.5
3.7
32.7
50
NONE OR DISCONNECT
CONVENIENCE OUTLET
460-3-60
414
506
12.2
100
0.8
1.9
16.0
25
NONE OR DISCONNECT
CONVENIENCE OUTLET
575-3-60
518
633
9.0
78
0.6
1.6
11.8
20
Z*12
NONE OR DISCONNECT
CONVENIENCE OUTLET
208/230-3-60
187
253
30.1
225
1.5
3.7
39.1
60
NONE OR DISCONNECT
CONVENIENCE OUTLET
460-3-60
414
506
16.7
114
0.8
1.9
21.7
30
NONE OR DISCONNECT
CONVENIENCE OUTLET
575-3-60
518
633
12.2
80
0.6
1.6
15.8
25
Z*14
NONE OR DISCONNECT
CONVENIENCE OUTLET
208/230-3-60
187
253
48.1
245
1.5
3.7
61.6
80
NONE OR DISCONNECT
CONVENIENCE OUTLET
460-3-60
414
506
18.6
125
0.8
1.9
24.0
30
NONE OR DISCONNECT
CONVENIENCE OUTLET
575-3-60
518
633
14.7
100
0.6
1.6
19.0
30
FLA
—
Full Load Amps
LRA
—
Locked Rotor Amps
MCA —
Minimum Circuit Amps
MOCP —
Maximum Overcurrent
Protection
NEC
—
National Electrical Code
RLA
—
Rated Load Amps
*Units are suitable for use on electrical systems where voltage supplied to
the unit terminals is not below or above the listed limits.
NOTES:
1. The MCA and MOCP values are calculated in accordance with the NEC,
Article 440.
2. Motor RLA and LRA values are established in accordance with Underwriters’
Laboratories (UL), Standard 1995.
3. The 575-v units are UL, Canada-listed only.
4. Convenience outlet is available as a factory-installed option and is 115-v,
1 ph, 60 Hz.
5. 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 percentage
of voltage imbalance.
Example: Supply voltage is 230-3-60
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage =
(224 + 231 + 226)
=
681
3
3
=
227
Determine maximum deviation from average voltage.
(AB) 227 – 224 = 3 v
(BC) 231 – 227 = 4 v
(AC) 227 – 226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
% Voltage Imbalance
= 100 x
4
227
= 1.76%
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.
% Voltage Imbalance
= 100 x
max voltage deviation from average voltage
average voltage