8
Table 2—38HDR Electrical Data
38HDR
UNIT
SIZE
V---PH---Hz
VOLTAGE
RANGE*
COMPRESSOR
OUTDOOR FAN MOTOR
MIN
CKT
AMPS
FUSE/BKR
AMPS
RLA
LRA
FLA
NEC
Hp
kw
Out
Min
Max
018
208/230---1---60
187
253
9.0
48.0
0.80
0.125
0.09
12.1
20
024
208/230---1---60
187
253
12.8
58.3
0.80
0.125
0.09
16.8
25
030
208/230---1---60
187
253
14.1
73.0
1.45
0.25
0.19
19.1
30
036
208/230---1---60
187
253
14.1
77.0
1.45
0.25
0.19
19.1
30
208/230---3---60
187
253
9.0
71.0
1.45
0.25
0.19
12.7
20
460---3---60
414
506
5.6
38.0
0.80
0.25
0.19
7.8
15
048
208/230---1---60
187
253
21.8
117.0
1.45
0.25
0.19
28.7
50
208/230---3---60
187
253
13.7
83.1
1.45
0.25
0.19
18.6
30
460---3---60
414
506
6.2
41.0
0.80
0.25
0.19
8.6
15
060
208/230---1---60
187
253
26.4
134.0
1.45
0.25
0.19
34.5
60
208/230---3---60
187
253
16.0
110.0
1.45
0.25
0.19
21.5
35
460---3---60
414
506
7.8
52.0
0.80
0.25
0.19
10.6
15
LEGEND
:
FLA
--- Full Load Amps
LRA
--- Locked Rotor Amps
NEC
--- National Electrical Code
RLA
--- Rated Load Amps (compressor)
* Permissible limits of the voltage range at which the unit will operate
satisfactorily
NOTES
:
1. Control circuit is 24---V on all units and requires external power
source. Copper wire must be used from service disconnect to unit.
2. All motors/compressors contain internal overload protection.
3. In compliance with NEC (U.S.A. Standard) requirements for multi-
motor and combination load equipment (refer to NEC Articles 430
and 440), the overcurrent protective device for the unit shall be fuse
or breaker.
4. Motor RLA values are established in accordance with UL (Underwrit-
ers’ Laboratories) Standard 465 (U.S.A. Standard).
5. 38HDR018---030 units are only available in single---phase voltage.
6.
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-
age of voltage imbalance:
= 100 X
max voltage deviation from average voltage
average
EXAMPLE
: Supply voltage is 460---3---60
AB = 452v
BC = 464v
AC = 455v
Average Voltage = 452 + 464 + 455
3
=
1371
3
=
457
Determine maximum deviation from average voltage:
(AB) 457---452 = 5v
(BC) 464---457 = 7v
(AC) 457---455 = 2v
Maximum deviation is 7v.
Determine percentage of voltage imbalance
% of voltage imbalance = 100 x 7
57
=
1.53%
This amount of phase imbalance is satisfactory as it is below the maximum
allowable of 2%.
IMPORTANT
: Contact your local electric utility company immediately if the
supply voltage phase imbalance is more than 2%.
38H
D
R
