Bryant DuraPac Series 580f - Manual (Page 13)

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Table 2B — Electrical Data (With Convenience Outlet)
LEGEND
*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
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
= 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.
= 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
CRPWREXH030A00 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.
UNIT
580F NOMINAL
VOLTAGE
IFM
TYPE
VOLTAGE
RANGE
COMPR
(ea)
OFM
(ea)
IFM COMBUSTION
FAN MOTOR
FLA
POWER SUPPLY
DISCONNECT
SIZE*
Min Max RLA LRA Hp FLA FLA MCA MOCP† FLA LRA
036
(3 Tons)
208/230-1-60
Std
187 254 16.2 96.0 1 / 4 1.4
3.5
.6
31.2/31.2 35/35 30/30 111/111
Alt 4.9 32.6/32.6 40/40 31/31 116/116
208/230-3-60
Std
187 254 10.2 75.0 1 / 4 1.4
3.5
.6
22.5/22.5 25/25 23/23 90/ 90
Alt 4.9 23.9/23.9 30/30 25/25 95/ 95
High 5.2 24.2/24.2 30/30 25/25 114/114
460-3-60
Std
414 508 4.4 40.0 1 / 4 0.8
1.3
.3
9.8 15 10 47
Alt 2.1 10.6 15 11 50
High 2.6 11.1 15 11 59
575-3-60
Std
518 632 3.7 31.0 1 /
4
0.8
1.3
.3
7.2 15 8 36
Alt 2.1 7.7 15 9 39
High 2.6 8.0 15 9 58
048
(4 Tons)
208/230-1-60
Std
187 254 23.3 118.0 1 /
4
1.4
3.5
.6
40.0/40.0 45/45 38/38 134/134
Alt 4.9 41.4/41.4 50/50 40/40 138/138
208/230-3-60
Std
187 254 15.4 90.0 1 /
4
1.4
3.5
.6
29.0/29.0 35/35 29/29 106/106
Alt 4.9 30.4/30.4 35/35 30/30 110/110
High 5.2 30.7/30.7 35/35 31/31 129/129
460-3-60
Std
414 508 8.3 45.0 1 / 4 0.8
1.8
.3
15.2 20 15 53
Alt 2.1 15.5 20 15 55
High 2.6 16.0 20 16 64
575-3-60
Std
518 632 6.4 36.0 1 / 4 0.8
1.8
.3
10.9 15 12 42
Alt 2.1 11.1 15 12 44
High 2.6 11.4 15 12 51
060
(5 Tons)
208/230-1-60
Std
187 254 28.8 147.0 1 / 4 1.4
5.9
.6
49.3/49.3 60/60 47/47 166/166
Alt 6.6 50.0/50.0 60/60 48/48 188/188
208/230-3-60
Std
187 254 16.0 114.0 1 / 4 1.4
5.9
.6
32.1/32.1 40/40 32/32 133/133
Alt 5.2 31.4/31.4 40/40 32/32 153/153
High 7.5 33.7/33.7 40/40 34/34 179/179
460-3-60
Std
414 508 7.4 64.0 1 / 4 0.8
3.1
.3
15.3 20 15 74
Alt 2.6 15.6 20 15 83
High 3.4 15.6 20 16 96
575-3-60
Std
518 632 6.2 52.0 1 / 4 0.8
3.1
.3
11.5 15 13 60
Alt 2.6 11.7 15 12 67
High 3.4 11.7 15 13 77
072
(6 Tons)
208/230-3-60
Std
187 254 20.6 146.0 1 / 4 1.4
5.2
.6
37.2/37.2 45/45 37/37 184/184
High 7.5 39.5/39.5 45/45 39/39 210/210
460-3-60
Std
414 508 9.5 73.0 1 / 4 0.6
2.6
.3
17.6 20 17 92
High 3.4 18.4 25 18 105
575-3-60
Std
518 632 7.6 58.4 1 / 4 0.6
2.6
.3
13.1 20 14 77
High 3.4 13.7 20 15 90
073
(6 Tons)
208/230-3-60
Std
187 254 20.6 146.0 1 /
4
1.4
5.2
.6
37.2/37.2 45/45 37/37 184/184
High 7.5 39.5/39.5 45/45 39/39 210/210
460-3-60
Std
414 508 9.5 73.0 1 /
4
0.6
2.6
.3
17.6 20 17 92
High 3.4 18.4 25 18 105
575-3-60
Std
518 632 7.6 58.4 1 /
4
0.6
2.6
.3
13.1 20 14 77
High 3.4 13.7 20 15 90
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
= 100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
452 + 464 + 455
3
=
1371
3
% Voltage Imbalance = 100 x
7
457
POWER EXHAUST
PART NO.
MCA
(230 v)
MCA
(460 v)
MCA
(575 v)
MOCP
(for separate
power source)
CRPWREXH030A00 1.6 N/A 0.64 15
CRPWREXH021A00 N/A 0.9 N/A 15
CRPWREXH022A00 3.3 N/A 1.32 15
CRPWREXH023A00 N/A 1.8 N/A 15
CRPWREXH028A00 1.7 N/A 0.68 15
CRPWREXH029A00 N/A 1.0 N/A 15