Carrier 50EY - Manual (Page 23)

Table 3 — Electrical Data — 50EJ,EK,EW,EY024-048 (cont)
UNIT
SIZE
NOMINAL
VOLTAGE
(3 Ph 60 Hz)
VOLTAGE
RANGE
COMPRESSOR
OFM IFM
POWER
EXHAUST
ELECTRIC
HEAT*
POWER SUPPLY
No. 1 No. 2
Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA kW FLA MCA MOCP†
048
208/230 187 254 82.1 446 69.2 345 4 1 5.3
20
59.4/
54.0
— — — — 252.4/247.0 300/300
23.6 41.6 — — 276.0/270.6 300/300
— — 29/36 75.1/ 86.6 252.4/247.0 300/300
23.6 41.6 29/36 75.1/ 86.6 276.0/270.6 300/300
— — 59/72 150.1/173.2 252.4/247.0 300/300
23.6 41.6 59/72 150.1/173.2 276.0/270.6 300/300
25
74.8/
68.0
— — — — 267.8/261.0 300/300
23.6 41.6 — — 291.4/284.6 300/300
— — 29/36 75.1/ 86.6 267.8/261.0 300/300
23.6 41.6 29/36 75.1/ 86.6 291.4/284.6 300/300
— — 59/72 150.1/173.2 267.8/261.0 300/300
23.6 41.6 59/72 150.1/173.2 291.4/284.6 300/300
30
88.0/
80.0
— — — — 281.0/273.0 300/300
23.6 41.6 — — 304.6/296.6 350/300
— — 29/36 75.1/ 86.6 281.0/273.0 300/300
23.6 41.6 29/36 75.1/ 86.6 304.6/296.6 350/300
— — 59/72 150.1/173.2 281.0/273.0 300/300
23.6 41.6 59/72 150.2/173.2 304.6/296.6 350/300
460 414 508 42.3 223 28.8 173 4 1 2.7
20 27
— — — — 119.5 150
12.6 23.6 — — 132.1 150
— — 36 43.3 119.5 150
12.6 23.6 36 43.3 132.1 150
— — 72 86.6 120.4 150
12.6 23.6 72 86.6 136.1 150
25 34
— — — — 126.5 150
12.6 23.6 — — 139.1 175
— — 36 43.3 126.5 150
12.6 23.6 36 43.3 139.1 175
— — 72 86.6 129.1 150
12.6 23.6 72 86.6 144.9 175
30 40
− — — — 132.5 150
12.6 23.6 — — 145.1 175
— — 36 43.3 132.5 150
12.6 23.6 36 43.3 145.1 175
— — 72 86.6 136.6 175
12.6 23.6 72 86.6 152.4 175
575 518 632 34.6 164 26.7 120 4 1 2.4
20 22
— — — — 101.6 125
12.6 23.6 — — 114.2 125
— — 36 34.6 101.6 125
12.6 23.6 36 34.6 114.2 125
— — 72 69.3 101.6 125
12.6 23.6 72 69.3 114.2 125
25 27
— — — — 106.6 125
12.6 23.6 — — 119.2 150
— — 36 34.6 106.6 125
12.6 23.6 36 34.6 119.2 150
— — 72 69.3 106.6 125
12.6 23.6 72 69.3 119.2 150
30 32
— — — — 111.6 125
12.6 23.6 — — 124.2 150
— — 36 34.6 111.6 125
12.6 23.6 36 34.6 124.2 150
— — 72 69.3 111.6 125
12.6 23.6 72 69.3 124.2 150
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
average voltage
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
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.
7
% Voltage Imbalance = 100 x
457
= 1.53%
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).
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