Carrier REFRIGERANT R-410A Installation And Service Instructions Manual page 18

UNIT V-PH-Hz
208/230-3-60
40RUA*25
460-3-60
40RUS*25
575-3-60
208/230-3-60
40RUA*28
460-3-60
40RUS*28
575-3-60
208/230-3-60
40RUA*30
460-3-60
40RUS*30
575-3-60
See Legend and Notes below.
UNIT V-PH-Hz
208/230-3-60
40RUA*25
460-3-60
40RUS*25
575-3-60
208/230-3-60
40RUA*28
40RUA*30
460-3-60
40RUS*28
40RUS*30
575-3-60
See Legend and Notes below.
LEGEND
FLA — Full Load Amps
— Maximum Overcurrent Protection
MOCP
† Motors are designed for satisfactory operation within 10% of nominal
voltages shown. Voltages should not exceed the limits shown in the
Voltage Limits column.
NOTES:
1. Minimum circuit amps (MCA) and MOCP values are calculated in accor-
dance with NEC (National Electrical Code), Article 440.
2. Motor FLA values are established in accordance with UL (Underwriters'
Laboratories) Standard 1995.
3. 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 percentage of
voltage imbalance.
max voltage deviation from average voltage
% Voltage Imbalance = 100 x
EXAMPLE: Supply voltage is 400-3-50.
AB = 393 v
BC = 403 v
AC = 396 v
Average Voltage =
Table 4 — Electrical Data, Standard Motors
VOLTAGE
†
LIMITS
187-253
414-506
518-632
187-253
414-506
518-632
187-253
414-506
518-632
Table 5 — Electrical Data, Alternate Motors
VOLTAGE
†
LIMITS
187-253
414-506
518-632
187-253
414-506
518-632
Legend and Notes For Tables 4 and 5
average voltage
393 + 403 + 396
3
1192
=
3
= 397
FAN MOTOR
Hp (kW) FLA
5.0 (3.73) 14.6/12.8
5.0 (3.73) 6.4
5.0 (3.73) 5.1
7.5 (5.59) 21.4/19.4
7.5 (5.59) 9.7
7.5 (5.59) 7.8
10.0 (7.46) 28.2/26.8
10.0 (7.46) 13.4
10.0 (7.46) 10.3
FAN MOTOR
Hp (kW) FLA
7.5 (5.59) 21.4/19.4
7.5 (5.59) 9.7
7.5 (5.59) 7.8
10.0 (7.46) 28.2/26.8
10.0 (7.46) 13.4
10.0 (7.46) 10.3
Determine maximum deviation from average voltage
(AB) 397 – 393 = 4 v
(BC) 403 – 397 = 6 v
(AC) 397 – 396 = 1 v
Maximum deviation is 6 v.
Determine percent voltage imbalance.
% Voltage Imbalance = 100 x
= 1.5%
This amount of phase imbalance is satisfactory because it is below the maxi-
mum allowable 2%.
IMPORTANT:
If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
18
POWER SUPPLY
Minimum
MOCP
Circuit Amps
18.3/16.0 30/25
8.0 15
6.4 15
26.9/24.3 45/40
12.1 20
9.8 15
35.3/33.5 60/60
16.8 30
12.9 20
POWER SUPPLY
Minimum
MOCP
Circuit Amps
26.9/24.3 45/40
12.1 20
9.8 15
35.3/33.5 60/60
16.8 30
12.9 20
6
397