Carrier 50JZ Product Data page 23

VOLTAGE
UNIT
RANGE
SIZE V-PH-Hz
50JZ
Min
024 208/230-1-60 187
030 208/230-1-60 187
036
208/230-1-60 187
042 208/230-1-60 187
048 208/230-1-60 187
060
208/230-1-60 187
LEGEND
FLA — Full Load Amps
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA — Rated Load Amps
*Heater capacity (KW) based on heater voltage of 208v, 240v, & 480v.
If power distribution voltage to unit varies from rated heater voltage,
heater KW will vary accordingly.
NOTES:
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse . The CGA (Canadian Gas
Association) units may be fuse or circuit breaker.
2. Minimum wire size is based on 60 C copper wire. If other than
60 C wire is used, or if length exceeds wire length in table,
determine size from NEC.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply volt-
age is greater than 2%. Use the following formula to determine
the percentage of voltage imbalance.
% Voltage imbalance
max voltage deviation from average voltage
= 100 x
average voltage
50JZ WITH ICM FIOP ELECTRICAL DATA
OUTDOOR
COMPRESSOR
FAN MOTOR
Max RLA LRA FLA
253 13.5 61.0 0.9
253 15.9 73.0 0.9
253 16.9 83.0 1.6
253 22.4 105.0 0.9
253 21.3 109.0 1.6
253 27.6 158.0 1.6
®
INDOOR
FAN MOTOR ELECTRIC HEAT
FLA Nominal kw*
—/—
3.8/5.0 18.1/20.8
4.3
5.4/7.2 25.9/30.0
7.5/10.0 36.1/41.7
—/—
3.8/5.0 18.1/20.8
4.3 5.4/7.2 25.9/30.0
7.5/10.0 36.1/41.7
11.3/15.0 54.2/62.5
—/—
3.8/5.0 18.1/20.8
6.8 5.4/7.2 25.9/30.0
7.5/10.0 36.1/41.7
11.3/15.0 54.2/62.5
—/—
3.8/5.0 18.1/20.8
5.4/7.2 25.9/30.0
6.8
7.5/10.0 36.1/41.7
11.3/15.0 54.2/62.5
15.0/20.0 72.2/83.3
—/—
3.8/5.0 18.1/20.8
5.4/7.2 25.9/30.0
6.8
7.5/10.0 36.1/41.7
11.3/15.0 54.2/62.5
15.0/20.0 72.2/83.3
—/—
3.8/5.0 18.1/20.8
5.4/7.2 25.9/30.0
9.2
7.5/10.0 36.1/41.7
11.3/15.0 54.2/62.5
15.0/20.0 72.2/83.3
EXAMPLE: Supply voltage is 460-3-60.
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.
SINGLE POINT
POWER SUPPLY
MAX FUSE
FLA UNIT MCA or CKT. BKR.
—/— 22.1/22.1 30/30
44.6/48.1 50/50
54.5/59.6 60/–
67.2/74.2 —
—/— 25.1/25.1 30/30
47.6/51.1 50/50
57.4/62.6 —
70.2/77.2 —
92.8/103.2 —
—/— 29.5/29.5 40/40
52.1/55.6 60/60
61.9/67.0 —
74.7/81.6 —
97.2/107.7 —
—/— 35.7/35.7 50/50
58.3/61.7 —
68.1/73.2 —
80.8/87.8 —
103.4/113.0 —
126.0/139.9 —
—/— 35.0/35.0 50/50
57.6/61.1 —
67.4/72.5 —
80.2/87.1 —
102.7/113.2 —
125.3/139.2 —
—/— 45.1/45.1 60/60
67.7/71.1 —
77.7/82.8 —
90.3/97.2 —
112.8/123.2 —
135.4/149.3 —
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
7
457
= 1.53%
MOCP
—
—
–/70
70/80
—
—
70/70
80/80
100/110
—
—
70/80
80/90
100/110
—
70/70
80/80
90/90
110/125
150/150
—
70/70
80/80
90/90
110/125
150/150
—
80/80
90/90
100/110
125/125
150/150
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