Bryant DURAPAC PLUS 581A Installation And Service Instructions Manual page 13

VOLTAGE
NOMINAL
581A
RANGE
VOLTAGE No. 1
UNIT
(3 Ph,
SIZE
Min Max RLA LRA RLA LRA RLA LRA Qty
60 Hz)
208/230 187 253 16.7
210 460 414 506 9
575 518 633 7
208/230 187 253 22.4
240 460 414 506 10.7
575 518 633 9.3
208/230 187 253 47.1
300 460 414 506 19.6
575 518 633 15.8
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
*Fuse or HACR circuit breaker.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equip-
ment (refer to NEC Articles 430 and 440), the overcurrent protective device for the
unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.
2. 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 percent voltage imbalance.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Table 4A — Electrical Data — Units Without Convenience Outlet
COMPRESSOR
No. 2 No. 3
130 16.7 130 22.4 184 4
70 9 70 10.7 90 4
55 7 55 9.3 73 4
184 22.4 184 22.4 184 4
90 10.7 90 10.7 90 4
73 9.3 73 9.3 73 4
245 47.1 245 — — 6
125 19.6 125 — — 6
100 15.8 100 — — 6
POWER
OFM IFM
EXHAUST
FLA Qty Hp FLA
Hp Hp FLA
(ea)
— —
3.7 10.6/ 9.6
2 1
0.25 1.5
— —
5 16.7/15.2
2 1
— —
3.7 4.8
2 1
0.25 0.7
— —
5 7.6
2 1
— —
3 3.9
2 1
0.25 0.7
— —
5 6.1
2 1
— —
5 16.7/15.2
2 1
0.25 1.5
— —
7.5 24.2/22
2 1
— —
5 7.6
2 1
0.25 0.7
— —
7.5 11
2 1
— —
5 6.1
2 1
0.25 0.7
— —
7.5 9
2 1
— —
7.5 24.2/22
2 1
0.25 1.5
— —
10 30.8/28
2 1
— —
7.5 11
2 1
0.25 0.7
— —
10 14
2 1
— —
7.5 9
2 1
0.25 0.7
— —
10 11
2 1
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 voltage imbalance.
% Voltage Imbalance = 100 x
This amount of phase imbalance is satisfactory as it is below the maximum allow-
able 2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact the
local electric utility company immediately.
3. The convenience outlet full load amps (FLA) are 5, 3, and 3 for 208/230, 460,
575-V units, respectively.
— 13 —
COMBUSTION
POWER SUPPLY
FAN MOTOR
FLA MCA MOCP*
(ea)
— 78/ 77 100/ 90
5.9 90/ 89 100/100
0.5
— 84/ 83 100/100
5.9 96/ 94 100/100
— 39 45
3.1 45 50
0.3
— 42 50
3.1 48 50
— 32 40
2.4 37 45
0.24
— 35 40
2.4 39 45
— 96/ 94 100/100
5.9 107/106 125/125
0.5
— 103/101 125/110
5.9 115/113 125/125
— 45 50
3.1 51 60
0.3
— 49 50
3.1 55 60
— 39 45
2.4 44 50
0.24
— 42 50
2.4 47 50
— 139/137 175/175
5.9 151/149 175/175
0.5
— 146/143 175/175
5.9 158/155 200/200
— 59 60
3.1 66 80
0.3
— 62 80
3.1 69 80
— 49 60
2.4 54 60
0.24
— 51 60
2.4 56 60
AB = 452 v
BC = 464 v
AC = 455 v
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
7
457
= 1.53%
DISCONNECT
SIZE
FLA
83/ 82
97/ 96
90/ 89
104/102
42
49
45
52
35
40
37
43
103/102
117/115
112/109
126/123
49
56
53
60
42
48
46
51
147/144
160/158
154/151
168/164
63
70
66
73
52
57
54
59