Carrier 50JZ - Page 23

23
452=5v
457=7v
455=2v
LEGEND
FLA — Full Load Amps
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA
—
Rated
Load Amps
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
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
(BC) 464
(AC) 457
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.
®
*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.
50JZ WITH ICM FIOP ELECTRICAL DATA
UNIT
SIZE
50JZ
V-PH-Hz
VOLTAGE
RANGE
COMPRESSOR
OUTDOOR
FAN MOTOR
INDOOR
FAN MOTOR ELECTRIC HEAT
SINGLE POINT
POWER SUPPLY
Min Max RLA LRA FLA FLA Nominal kw* FLA UNIT MCA
MAX FUSE
or CKT. BKR. MOCP
024 208/230-1-60 187 253 13.5 61.0 0.9 4.3
—/—
3.8/5.0
5.4/7.2
7.5/10.0
—/—
18.1/20.8
25.9/30.0
36.1/41.7
22.1/22.1
44.6/48.1
54.5/59.6
67.2/74.2
30/30
50/50
60/–
—
—
—
–/70
70/80
030 208/230-1-60 187 253 15.9 73.0 0.9 4.3
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
25.1/25.1
47.6/51.1
57.4/62.6
70.2/77.2
92.8/103.2
30/30
50/50
—
—
—
—
—
70/70
80/80
100/110
036
208/230-1-60 187 253 16.9 83.0 1.6 6.8
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
29.5/29.5
52.1/55.6
61.9/67.0
74.7/81.6
97.2/107.7
40/40
60/60
—
—
—
—
—
70/80
80/90
100/110
042 208/230-1-60 187 253 22.4 105.0 0.9 6.8
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
15.0/20.0
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
72.2/83.3
35.7/35.7
58.3/61.7
68.1/73.2
80.8/87.8
103.4/113.0
126.0/139.9
50/50
—
—
—
—
—
—
70/70
80/80
90/90
110/125
150/150
048
208/230-1-60 187 253 21.3 109.0 1.6 6.8
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
15.0/20.0
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
72.2/83.3
35.0/35.0
57.6/61.1
67.4/72.5
80.2/87.1
102.7/113.2
125.3/139.2
50/50
—
—
—
—
—
—
70/70
80/80
90/90
110/125
150/150
060
208/230-1-60 187 253 27.6 158.0 1.6 9.2
—/—
3.8/5.0
5.4/7.2
7.5/10.0
11.3/15.0
15.0/20.0
—/—
18.1/20.8
25.9/30.0
36.1/41.7
54.2/62.5
72.2/83.3
45.1/45.1
67.7/71.1
77.7/82.8
90.3/97.2
112.8/123.2
135.4/149.3
60/60
—
—
—
—
—
—
80/80
90/90
100/110
125/125
150/150