Bryant 558F User Manual
Page 52
ELECTRICAL DATA — 558D090-150 (cont)
UNIT
558D
NOMINAL
V-PH-Hz
IFM
VOLTAGE
RANGE
COMPR
(ea)
OFM
IFM
ELECTRIC
HEAT*
POWER SUPPLY
DISCONNECT
SIZE†
Min
Max
RLA
LRA
Qty
Hp
FLA
FLA
Nom kW**
FLA
MCA
MOCP††
FLA
LRA
150
(12
1
⁄
2
Tons)
208/230-3-60
Std
187
254
22.3
142.0
2
1
⁄
4
1.4
10.6
—
—
63.6/ 63.6
70/ 70
67/ 67
375/375
7.8/10.4
21.7/ 25.0
63.6/ 63.6
70/ 70
67/ 67
12.0/16.0
33.4/ 38.1
63.6/ 63.6
70/ 70
67/ 67
24.0/32.0
66.7/ 74.2
96.6/109.5
100/110
89/101
31.8/42.4
88.4/102.0
123.7/140.8
125/150
114/129
37.5/50.0
104.2/120.3
143.5/133.5
150/150
132/151
Alt
15.0
—
—
68.0/ 68.0
80/ 80
72/ 72
398/398
7.8/10.4
21.7/ 25.0
68.0/ 68.0
80/ 80
72/ 72
12.0/16.0
33.4/ 38.1
68.0/ 68.0
80/ 80
72/ 72
24.0/32.0
66.7/ 74.2
102.1/115.0
110/125
94/106
31.8/42.4
88.4/102.0
129.2/146.3
150/150
119/135
37.5/50.0
104.2/120.3
149.0/139.0
150/175
137/156
460-3-60
Std
414
508
10.4
72.0
2
1
⁄
4
0.8
4.8
—
—
29.6
40
31
190
16.5
19.8
30.8
40
31
27.8
33.4
47.8
50
44
33.0
39.7
55.6
60
51
41.7
50.2
68.7
70
63
50.0
60.1
66.1
80
75
Alt
7.4
—
—
32.2
45
34
201
16.5
19.8
34.1
45
34
27.8
33.4
51.0
60
47
33.0
39.7
58.9
60
54
41.7
50.2
71.9
80
66
50.0
60.1
69.4
80
78
575-3-60
Std
518
632
9.6
58.5
2
1
⁄
4
0.8
4.8
—
—
26.6
30
28
154
18.0
17.0
26.6
30
28
36.0
34.0
47.5
50
44
54.0
51.0
56.0
60
63
Alt
7.4
—
—
28.6
35
30
162
18.0
17.0
28.7
35
30
36.0
34.0
50.1
50
46
54.0
51.0
58.6
70
66
LEGEND AND NOTES FOR ELECTRICAL DATA TABLES ON PAGES 49-54
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
*Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v, and
575 v. Heaters are rated at 240 v, 480 v, and 575 v. If power distribution voltage
to unit varies from rated heater voltage, heater kW will vary accordingly. To de-
termine heater capacity at actual unit voltage, multiply 240 v, 480 v, or 575 v
capacity by multipliers found in Electric Heat Multiplication Factors table on
page 48.
†Used to determine minimum disconnect size per NEC.
**Heaters are field installed only.
††Fuse or HACR circuit breaker.
Fusing in single point box provides the required branch circuit protection.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load
equipment (refer to NEC Articles 430 and 440), the overcurrent protective de-
vice for the unit shall be fuse or HACR breaker. The 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 of voltage
imbalance.
max voltage deviation from average voltage
% Voltage Imbalance = 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 − 452 = 5 v
(BC) 464 − 457 = 7 v
(AC) 457 − 455 = 2 v
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.
3. MCA calculation for units with electric heaters over 50 kW = (1.25 x IFM amps)
+ (1.00 x heater FLA).
036-150 Only
036-072 Only
090-150 Only
180-300 Only
180-300 Only
52