Bryant 579F User Manual page 81

UNIT SIZE NOMINAL IFM
580F V-PH-Hz TYPE
STD
208/230-3-60
HIGH
STD
103
460-3-60
(8 1 / Ton)
2
HIGH
STD
575-3-60
HIGH
STD
208/230-3-60 ALT
HIGH
STD
120
460-3-60 ALT
(10 Ton)
HIGH
STD
575-3-60 ALT
HIGH
STD
208/230-3-60 ALT
HIGH
STD
121
460-3-60 ALT
(10 Ton)
HIGH
STD
575-3-60 ALT
HIGH
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
*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. 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.
% 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 =
=
= 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.
ELECTRICAL DATA (cont)
VOLTAGE
COMPRESSOR (each)
CONV
RANGE
OUTLET
Min Max Qty
NO
YES
187 254 2
NO
YES
NO
YES
414 508 2
NO
YES
NO
YES
518 632 2
NO
YES
NO
YES
NO
187 254 2
YES
NO
YES
NO
YES
NO
414 508 2
YES
NO
YES
NO
YES
NO
518 632 2
YES
NO
YES
NO
YES
NO
187 254 2
YES
NO
YES
NO
YES
NO
414 508 2
YES
NO
YES
NO
YES
NO
518 632 2
YES
NO
YES
452 + 464 + 455
3
1371
3
OFM (each)
IFM
FLA
RLA LRA Qty FLA
5.8
17.3 120.0 2 1.4
10.6
2.6
7.9 70.0 2 0.7
4.8
2.0
5.5 50.0 2 0.6
2.8
5.8
15.8 130 2 1.4 7.5
15.0
2.6
7.9 64 2 0.7 3.4
7.4
2.0
6.6 52 2 0.6 2.0
2.8
5.8
15.8 130 2 1.4 7.5
15.0
2.6
7.9 64 2 0.7 3.4
7.4
2.0
6.6 52 2 0.6 2.8
3.3
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
= 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. For units with power exhaust: 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 (must be in accordance with NEC and/or local codes). Determine the new
MCA including the power exhaust using the following formula:
MCA New = MCA unit only + MCA of Power Exhaust
For example, using a 580F060 unit with MCA = 28.9 and MOCP = 35, with
CRPWREXH030A01 power exhaust.
MCA New = 28.9 amps + 1.6 amps = 30.5 amps
If the new MCA does not exceed the published MOCP, then MOCP would not change. The
MOCP in this example is 35 amps, the MCA New is below 35, 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.
POWER EXHAUST ELECTRICAL DATA
POWER EXHAUST
PART NO.
CRPWREXH030A01
CRPWREXH021A01
CRPWREXH022A01
CRPWREXH023A01
CRPWREXH028A01
CRPWREXH029A01
*Single or three phase.
81
COMBUSTION
POWER SUPPLY
FAN MOTOR
FLA MCA MOCP†
44.3 50
49.1 60
0.6
49.1 60
53.9 60
21.0 25
23.2 30
0.3
23.2 30
25.4 30
16.7 20
18.4 25
0.3
18.5 25
20.2 25
44.2 50
50.2 60
45.9 50
0.6
51.9 60
53.4 60
59.4 70
21.8 25
27.8 30
22.6 25
0.3
25.3 30
26.6 30
29.3 35
18.1 25
24.1 25
18.7 25
0.3
24.7 25
21.9 30
24.6 30
44.6 50
49.4 60
46.3 60
0.6
51.1 60
53.8 60
58.6 70
22.0 25
24.2 30
22.8 25
0.3
25.0 30
26.8 30
29.0 35
18.1 20
19.8 25
18.7 20
0.3
20.4 25
21.9 25
23.6 25
7
457
APPLICATION MCA MCA MCA
USAGE (230 V) (460 V) (575 V)
036-073* 1.6 N/A 0.64
036-073 N/A 0.68 N/A
090-151* 3.4 N/A 1.32
090-151 N/A 1.4 N/A
ALL* 1.7 N/A 0.68
ALL N/A 0.7 N/A
MINIMUM UNIT
DISCONNECT SIZE*
FLA LRA
46 272
52 277
52 316
57 320
22 149
24 151
24 171
27 173
17 109
19 111
19 126
21 128
46 307
52 311
48 326
54 330
57 374
62 378
23 152
25 154
24 191
26 193
28 185
31 187
19 123
21 109
20 155
22 141
23 150
25 136
46 307
52 312
48 326
54 331
57 374
62 379
23 152
25 154
24 191
26 193
28 185
30 187
19 123
21 125
20 150
22 156
23 155
25 151
MOCP
(separate
power source
only)
15
15
15
15
15
15