Bryant DURAPAC PLUS 581B Installation & Service Instructions Manual page 12

Table 2C — Electrical Data — High-Static Motor Units Without Electrical Convenience Outlet
VOLTAGE
NOMINAL
UNIT
RANGE
VOLTAGE
581B
(V-Ph-Hz)
Min
208/230-3-60 187
036 460-3-60 414
575-3-60 518
208/230-3-60 187
048 460-3-60 414
575-3-60 518
208/230-3-60 187
060 460-3-60 414
575-3-60 518
208/230-3-60 187
072 460-3-60 414
575-3-60 518
Table 2D — Electrical Data — High-Static Motor Units With Electrical Convenience Outlet
VOLTAGE
NOMINAL
UNIT
RANGE
VOLTAGE
581B
(V-Ph-Hz)
Min
208/230-3-60 187
036 460-3-60 414
575-3-60 518
208/230-3-60 187
048 460-3-60 414
575-3-60 518
208/230-3-60 187
060 460-3-60 414
575-3-60 518
208/230-3-60 187
072 460-3-60 414
575-3-60 518
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
UL — Underwriters' Laboratories
*The values listed in this table do not include power exhaust. See table at right for
power exhaust requirements.
†Used to determine minimum disconnect per NEC.
**Fuse or HACR circuit breaker.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load
equipment (refer to NEC Articles 430 and 440), the overcurrent protective
device for the unit shall be fuse or HACR breaker. The UL, Canada units
may be fuse or circuit breaker.
2. Electrical data based on 95 F ambient outdoor-air temperature ± 10% voltage.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where phase imbalance in supply voltage is greater
than 2%. Use the following formula to determine the percent 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
Average Voltage =
Determine maximum deviation from average voltage.
COMPRESSOR
(each)
Max Qty RLA LRA
254 10.3 77.0
508 1 5.1 39.0
632 4.2 31.0
254 13.5 93.0
508 1 6.4 46.5
632 6.4 40.0
254 17.3 123.0
508 1 9.0 62.0
632 7.1 50.0
254 20.5 156.0
508 1 9.6 75.0
632 7.7 56.0
COMPRESSOR
(each)
Max Qty RLA LRA
254 10.3 77.0
508 1 5.1 39.0
632 4.2 31.0
254 13.5 93.0
508 1 6.4 46.5
632 6.4 40.0
254 17.3 123.0
508 1 9.0 62.0
632 7.1 50.0
254 20.5 156.0
508 1 9.6 75.0
632 7.7 56.0
452 + 464 + 455
3
1371
=
3
= 457
OFM COMBUSTION
IFM
(each) FAN MOTOR
FLA FLA RLA
0.7 5.8 0.6
0.4 2.6 0.3
0.4 2.6 0.3
0.7 5.8 0.6
0.4 2.6 0.3
0.4 2.6 0.3
1.5 7.5 0.6
0.8 3.4 0.3
0.8 3.4 0.3
1.4 7.5 0.6
0.6 3.4 0.3
0.6 3.4 0.3
OFM COMBUSTION
IFM
(each) FAN MOTOR
FLA FLA RLA
0.7 5.8 0.6
0.4 2.6 0.3
0.4 2.6 0.3
0.7 5.8 0.6
0.4 2.6 0.3
0.4 2.6 0.3
1.5 7.5 0.6
0.8 3.4 0.3
0.8 3.4 0.3
1.4 7.5 0.6
0.6 3.4 0.3
0.6 3.4 0.3
(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.
POWER EXHAUST ELECTRICAL DATA
POWER EXHAUST
PART NO.
CRPWREXH021A01
CRPWREXH022A01
CRPWREXH023A01
CRPWREXH028A01
CRPWREXH029A01
CRPWREXH030A01
N/A — Not available
NOTE: If a single power source is to be used, size wire to include power exhaust
MCA and MOCP.
Check MCA and MOCP when power exhaust is powered through the unit. Deter-
mine the new MCA including the power exhaust using the following formula:
MCA New = MCA unit only + MCA of Power Exhaust
For example, using a 581B072 unit with MCA = 32.8 and MOCP = 40, with
CRPWREXH030A01 power exhaust.
MCA New = 32.8 amps + 1.6 amps = 34.4 amps
If the new MCA does not exceed the published MOCP, then MOCP would not
change. The MOCP in this example is 40 amps and the MCA New is below 40;
therefore the MOCP is acceptable. If "MCA New" is larger than the published
MOCP, raise the MOCP to the next larger size. For separate power, the MOCP for
the power exhaust will be 15 amps per NEC.
— —
12
MINIMUM UNIT
POWER
DISCONNECT
SUPPLY*
MCA MOCP** FLA
19.4 25 19
9.4 20
7.7 20
23.4 30 23
11.0 20 11
10.4 20 10
30.6 35 30
15.5 20 15
12.2 20 12
34.5 40 34
16 20 16
12.8 20 13
MINIMUM UNIT
POWER
DISCONNECT
SUPPLY*
MCA MOCP** FLA
25.4 30 25
12.1 20 12
9.8 20 10
29.4 35 29
13.7 20 13
12.6 20 12
36.6 40 36
18.2 20 18
14.4 20 14
40.5 45 39
18.7 25 18
15.0 20 15
7
457
= 1.53%
MCA MCA MCA
(230 v) (460 v) (575 v)
N/A 0.9 N/A
3.3 N/A 1.32
N/A 1.8 N/A
1.7 N/A 0.68
N/A 1.0 N/A
1.6 N/A 0.64
SIZE†
LRA
120
9 60
8 48
136
68
57
187
94
76
219
107
81
SIZE†
LRA
124
63
50
140
70
59
192
96
77
224
109
83
MOCP
(for separate
power source)
15
15
15
15
15
15