Carrier 50JZ Installation, Start-Up And Service Instructions Manual page 12

VOLTAGE
UNIT 50JZ
RANGE
V-PH-HZ
SIZE
Min Max
024 400–3–50 360
030 400–3–50 360
036 400–3–50 360
048 400–3–50 360
(See legend following Electrical Data charts)
LEGEND
FLA — Full Load Amps
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA — Rated Load Amps
CKTBKR — Circuit Breaker
NOTES:
1. In compliance with IEC(International Electrical Code) requirements
for multimotor and combination load equipment (refer to IEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse .
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 IEC.
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
2. Read and follow instructions on all DANGER, WARNING,
CAUTION, and INFORMATION labels attached to, or
shipped with, unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages such as broken
lines, loose parts, disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections and on
unit base. Detecting oil generally indicates a refrigerant
leak. Leak-test all refrigerant tubing connections using
electronic leak detector, or liquid-soap solution. If a refrig-
erant leak is detected, see following Check for Refrigerant
Leaks section.
c. Inspect all field and factory-wiring connections. Be sure
that connections are completed and tight.
d. Inspect coil fins. If damaged during shipping and handling,
carefully straighten fins with a fin comb.
Table 4—Electrical Data—50JZ (50Hz)
COMPRESSOR OFM IFM ELECTRIC HEAT
RLA LRA FLA FLA Nominal Kw FLA MCA FUSE OR CKT. BKR MOCP
440 4.5 32.0 0.8
440 5.2 35.0 0.8
440 6.5 46.0 0.8
440 6.7 50.0 1.3
.
Fig. 13—Electrical Data Legend
8.1
– –
1.7 14.4
3.5 5.0
20.6
– – 9.0
3.5 5.0 15.3
1.7
6.9 10.0 21.5
10.4 15.0 21.5
– – 10.6
3.5 5.0 16.9
1.7
6.9 10.0 23.1
10.4 15.0 23.1
– – 13.2
3.5 5.0 19.4
3.5 6.9 10.0 25.7
10.4 15.0 25.7
13.9 20.0 25.7
EXAMPLE: Supply voltage is 400-3-50.
Determine maximum deviation from average voltage.
(AB) 397-
(BC) 403 -
(AC) 397 -
Maximum deviation is 6 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.
4. Verify the following conditions:
a. Make sure that outdoor-fan blade is correctly positioned in
fan orifice.
b. Make sure that air filter(s) is in place.
c. Make sure that condensate drain and trap are filled with
water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose parts have
been removed.
5. Compressors are internally spring mounted. Do not loosen or
remove compressor hold-down bolts.
6. Each unit system has 2 Schrader-type ports, one low-side
Schrader fitting located on the suction line, and one high-side
Schrader fitting located on the compressor discharge line. Be
sure that caps on the ports are tight.
12
POWER SUPPLY
15
15 –
25
15
20
–
25
30
15
20
–
25
30
20
30
35 –
40
45
AB = 393 v
BC = 403 v
AC = 396 v
393 + 403 + 396
Average Voltage =
1192
=
3
= 397
393 = 4 v
397 = 6 v
396 = 1 v
6
397
= 1.5%
DISCONNECT SIZE
FLA LRA
8 36
14 42
20 47
9 39
15 45
20 50
9 40
10 50
16 56
22 61
10 51
13 58
19 63
25 68
13 58
13 58
3
C02002