Bryant COMMERCIAL SINGLE PACKAGE ROOFTOP GAS HEAT/ELECTRIC COOLING 581B - Manual (Page 45)

45
ELECTRICAL DATA
581B036-072 STANDARD MOTOR (Units Without Electrical Convenience Outlet)
581B036-072 STANDARD MOTOR (Units With Electrical 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. UL, Can-
ada 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.
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.
% 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%, con-
tact your local electric utility company immediately.
UNIT
581B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
COMPRESSOR OFM IFM
COMBUSTION
FAN MOTOR
POWER
SUPPLY
WITH OUTLET
MINIMUM UNIT
DISCONNECT
SIZE*
Min Max RLA LRA FLA FLA FLA MCA MOCP† FLA LRA
036
(3 Tons)
208/230-1-60 187 254 16.0 88.0 0.7 4.9 .57 25.6/25.6 35/35 25/25 101/101
208/230-3-60 187 254 10.3 77.0 0.7 4.9 .57 18.5/18.5 25/25 18/18 90/ 90
460-3-60 414 508 5.1 39.0 0.4 2.2 .30 9.0 15 9 46
575-3-60 518 632 4.2 31.0 0.4 2.2 .30 7.3 15 7 36
048
(4 Tons)
208/230-1-60 187 254 23.7 129.0 0.7 4.9 .57 35.2/35.2 45/45 34/34 142/142
208/230-3-60 187 254 13.5 99.0 0.7 4.9 .57 22.5/22.5 30/30 22/22 112/112
460-3-60 414 508 7.4 49.5 0.4 2.2 .30 11.9 15 12 56
575-3-60 518 632 5.8 40.0 0.4 2.2 .30 9.3 15 9 45
060
(5 Tons)
208/230-1-60 187 254 28.8 169.0 1.5 8.8 .57 46.3/46.3 60/60 45/45 216/216
208/230-3-60 187 254 17.3 123.0 1.5 5.8 .57 28.9/28.9 35/35 28/28 168/168
460-3-60 414 508 9.0 62.0 0.8 2.6 .30 14.7 20 14 84
575-3-60 518 632 7.1 50.0 0.8 2.6 .30 11.6 15 11 67
072
(6 Tons)
208/230-3-60 187 254 20.5 156.0 1.4 5.8 .57 32.8/32.8 40/40 32/32 200/200
460-3-60 414 508 9.6 70.0 0.6 2.6 .30 15.2 20 15 92
575-3-60 518 632 7.7 56.0 0.6 2.6 .30 12.2 15 13 78
UNIT
581B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAGE
RANGE
COMPRESSOR OFM IFM
COMBUSTION
FAN MOTOR
POWER
SUPPLY
WITH OUTLET
MINIMUM UNIT
DISCONNECT
SIZE*
Min Max RLA LRA FLA FLA FLA MCA MOCP† FLA LRA
036
(3 Tons)
208/230-1-60 187 254 16.0 88.0 0.7 4.9 .57 31.6/31.6 40/40 30/30 106/106
208/230-3-60 187 254 10.3 77.0 0.7 4.9 .57 24.5/24.5 30/30 24/24 95/95
460-3-60 414 508 5.1 39.0 0.4 2.2 .30 11.7 15 11 48
575-3-60 518 632 4.2 31.0 0.4 2.2 .30 9.5 15 9 38
048
(4 Tons)
208/230-1-60 187 254 23.7 129.0 0.7 4.9 .57 41.2/41.2 50/50 39/39 147/147
208/230-3-60 187 254 13.5 99.0 0.7 4.9 .57 28.5/28.5 35/35 27/27 117/117
460-3-60 414 508 7.4 49.5 0.4 2.2 .30 14.6 20 14 58
575-3-60 518 632 5.8 40.0 0.4 2.2 .30 11.5 15 11 47
060
(5 Tons)
208/230-1-60 187 254 28.8 169.0 1.5 8.8 .57 52.3/52.3 60/60 50/50 221/221
208/230-3-60 187 254 17.3 123.0 1.5 5.8 .57 34.9/34.9 40/40 34/34 173/173
460-3-60 414 508 9.0 62.0 0.8 2.6 .30 17.4 20 17 86
575-3-60 518 632 7.1 50.0 0.8 2.6 .30 13.8 20 13 69
072
(6 Tons)
208/230-3-60 187 254 20.5 156.0 1.4 5.8 .57 38.8/38.8 45/45 37/37 205/205
460-3-60 414 508 9.6 70.0 0.6 2.6 .30 17.9 20 17 94
575-3-60 518 632 7.7 56.0 0.6 2.6 .30 14.3 20 15 79
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
= 100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
452 + 464 + 455
3
=
1371
3
7
457