Carrier 50HS018 Installation, Start-Up And Service Instructions Manual page 15

UNIT
SIZE V-Ph-Hz
50HS
018 208/230-1-60
024 208/230-1-60
208/230-1-60
030
208/230-3-60
208/230-1-60
036 208/230-3-60
460-3-60
208/230-1-60
042 208/230-3-60
460-3-60
208/230-1-60*
208/230-1-60†
208/230-3-60*
048
208/230-3-60†
460-3-60*
460-3-60†
208/230-1-60*
208/230-1-60†
208/230-3-60*
060
208/230-3-60†
460-3-60*
460-3-60†
LEGEND
CSA — Canadian Standards Association
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor-Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
(fuses or HACR-type circuit breaker)
NEC — National Electrical Code
OFM — Outdoor-Fan Motor
RLA — Rated Load Amps
*Carrier Scroll Compressor.
†Copeland Scroll Compressor.
NOTES:
1. In compliance with NEC requirements for multimotor and combi-
nation load equipment (refer to NEC Articles 430 and 440), the over-
current protective device for the unit shall be fuse or HACR breaker.
The CSA units may be fuse or circuit 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 per-
cent of voltage imbalance.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Table 3 — Electrical Data
COMPRESSOR
RLA
10.4
11.2
14.4
10.4
18.0
11.4
4.8
20.4
14.0
6.4
24.4
26.4
14.1
15.0
7.1
8.2
28.9
32.1
16.0
19.3
8.0
10.0
average voltage
OFM
LRA FLA
49.0 0.7
61.0 1.4
82.0 1.4
65.5 1.4
96.0 1.4
75.0 1.4
40.0 0.8
102.0 1.4
91.0 1.4
42.0 0.8
140.0 2.1
129.0 2.1
105.0 2.1
99.0 2.1
55.0 1.1
49.5 1.1
165.0 2.1
169.0 2.1
125.0 2.1
123.0 2.1
66.0 1.1
62.0 1.1
Average Voltage =
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
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.
15
POWER SUPPLY
IFM
MOCP
FLA MCA
1.8 15.5
2.0 17.4
2.6 22.0
2.6 17.0
2.8 26.7
2.8 18.5
1.4 9.0
4.0 30.9
4.0 22.9
2.0 10.8
5.0 40.1
5.0 40.1
5.0 25.9
5.0 25.9
2.3 13.7
2.3 13.7
6.2 48.4
6.2 48.4
6.2 32.4
6.2 32.4
3.2 16.8
3.2 16.8
452 + 464 + 455
3
1371
=
3
= 457
7
457
= 1.53%
MAX
25
25
30
25
40
25
10
50
30
15
60
60
35
40
15
20
60
60
40
50
20
25