Electrical Data - Carrier 50EJ Installation, Start-Up And Service Instructions Manual

VOLTAGE
NOMINAL
UNIT
RANGE
VOLTAGE
SIZE
(3 Ph 60 Hz)
Min Max
208/230 187 254
024 460 414 508
575 518 632
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
OFM — Outdoor (Condenser) Fan Motor
RLA — Rated Load Amps
*Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v, and 575 v.
If power distribution voltage to unit varies from rated heater voltage, heater kW will
vary accordingly.
†Fuse or HACR circuit breaker.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equip-
ment (refer to NEC Articles 430 and 440), the overcurrent protective device for the
unit shall be fuse or HACR breaker. The Canadian 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 percent of voltage imbalance.
max voltage deviation from average voltage
% Voltage Imbalance = 100 x
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
Table 4 — Electrical Data — 50EJ,EK,EW,EY024-048
COMPRESSOR
No. 1 No. 2
RLA LRA RLA LRA Qty
39.1 228 25.6 160 2
19.9 114 11.5 80 2
16.0 91 9.6 64 2
average voltage
452 + 464 + 455
3
1371
=
3
= 457
POWER
OFM IFM
EXHAUST
Hp FLA (ea) Hp FLA FLA
—
23.6
16.7/ —
5
15.2 23.6
—
23.6
—
23.6
30.8/ —
1 5.3 10
28.0 23.6
—
23.6
—
23.6
46.2/ —
15
42.0 23.6
—
23.6
—
12.6
—
5 7.6
12.6
—
12.6
—
12.6
—
1 2.7 10 14
12.6
—
12.6
—
12.6
—
15 21
12.6
—
12.6
—
12.6
—
5 6.1
12.6
—
12.6
—
12.6
—
1 2.4 10 11
12.6
—
12.6
—
12.6
—
15 17
12.6
—
12.6
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.
3. MCA calculation for units with electric heaters over 50 kW = (1.25 x IFM amps) +
(1.00 x heater FLA).
17
ELECTRIC
POWER SUPPLY
HEAT*
LRA kW FLA MCA
— — — 101.8/100.3
41.6 — — 125.4/123.9
— 29/36 75.1/ 86.6 114.7/127.3
41.6 29/36 75.1/ 86.6 144.2/156.8
— 59/72 150.1/173.2 171.0/192.2
41.6 59/72 150.1/173.2 200.5/221.7
— — — 115.9/113.1
41.6 — — 139.5/136.7
— 29/36 75.1/ 86.6 132.3/143.3
41.6 29/36 75.1/ 86.6 161.8/172.8
— 59/72 150.1/173.2 188.6/208.2
41.6 59/72 150.1/173.2 218.1/237.7
— — — 131.3/127.1
41.6 — — 154.9/150.7
— 29/36 75.1/ 86.6 151.6/160.8
41.6 29/36 75.1/ 86.6 181.1/190.3
— 59/72 150.1/173.2 207.9/225.7
41.6 59/72 150.1/173.2 237.4/255.2
— — —
23.6 — —
— 36 43.3
23.6 36 43.3
— 72 86.6
23.6 72 86.6 111.9
— — —
23.6 — —
— 36 43.3
23.6 36 43.3
— 72 86.6 104.1
23.6 72 86.6 119.9
— — —
23.6 — —
— 36 43.3
23.6 36 43.3
— 72 86.6 112.9
23.6 72 86.6 128.6
— — —
23.6 — —
— 36 34.6
23.6 36 34.6
— 72 69.3
23.6 72 69.3
— — —
23.6 — —
— 36 34.6
23.6 36 34.6
— 72 69.3
23.6 72 69.3
— — —
23.6 — —
— 36 34.6
23.6 36 34.6
— 72 69.3
23.6 72 69.3 106.3
7
457
= 1.53%
MOCP†
125/125
150/150
125/150
150/175
200/225
225/225
150/150
175/175
150/150
175/175
220/225
250/250
150/150
175/175
175/175
200/200
250/250
275/275
49.4 60
62.0 80
63.6 70
79.4 80
96.1 110
125
55.8 70
68.4 80
71.6 80
87.4 90
110
125
62.8 80
75.4 90
80.4 90
96.1 100
125
150
40.5 50
53.1 60
50.9 60
66.7 70
76.9 80
92.7 100
45.4 60
58.0 70
57.1 60
72.8 80
83.0 90
98.8 100
51.4 60
64.0 80
64.6 70
80.3 90
90.5 100
110