43
LEGEND
NOTES:
1. In compliance with NEC requirements for multi-motor and combination
load equipment (refer to NEC Articles 430 and 440), the overcurrent pro-
tective 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 percentage
of voltage imbalance.
Example: Supply voltage is 230-3-60
Determine maximum deviation from average voltage.
(AB) 227-224 = 3 v
(BC) 231-227 = 4 v
(AC) 227-226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
This amount of phase imbalance is satisfactory as it is below the maximum
allowable 2%.
Check all factory and field electrical connections for tightness.
UNIT WIRE/FUSE OR HACR BREAKER SIZING DATA
UNIT
NOM.
V-PH-HZ
IFM TYPE
NO C.O. OR UNPWR C.O. W/ PWRD C.O.
NO P.E. W/ P.E. (PWRD FR/ UNIT) NO P.E. W/ P.E. (PWRD FR/ UNIT)
MCA
MAX
FUSE
OR
HACR
BRKR
DISC. SIZE
MCA
MAX
FUSE
OR
HACR
BRKR
DISC SIZE
MCA
MAX
FUSE
OR
HACR
BRKR
DISC SIZE
MCA
MAX
FUSE
OR
HACR
BRKR
DISC SIZE
FLA LRA FLA LRA FLA LRA FLA LRA
582J*04
208/230-
1-60
DD-STD 30 45 29 88 32 45 31 90 34 50 34 93 36 50 36 95
MED 274026932945289532453198344534100
HIGH 29 45 28 118 31 45 30 120 34 50 34 123 36 50 36 125
208/230-
3-60
DD-STD 22 30 22 82 24 30 24 84 27 30 27 87 29 35 29 89
MED 20/19 25/25 19/19 111 22/21 30/30 21/21 113 24/24 30/30 25/24 116 26/26 30/30 27/26 118
HIGH 23/23 30/30 23/23 147 25/25 30/30 25/25 149 28/28 30/30 28/28 152 30/29 35/35 30/30 154
460-3-60
DD-STD 12 15 12 43 13 15 13 44 14 20 14 45 15 20 16 46
MED 11151057121511581315135914151460
HIGH 12 15 12 75 13 15 13 76 15 20 15 77 16 20 16 78
575-3-60
DD-STD 10 15 10 42 12 15 12 44 11 15 12 44 13 15 14 46
MED 7 15 7 45 9 15 9 47 9 15 9 47 11 15 11 49
HIGH 9 15 8 60 10 15 10 62 10 15 10 62 12 15 12 64
582J*05
208/230-
1-60
DD-STD 37 50 35 128 39 50 37 130 41 60 41 133 43 60 43 135
MED 34 50 32 133 36 50 35 135 39 60 38 138 41 60 40 140
HIGH 36 50 35 158 38 50 37 160 41 60 40 163 43 60 43 165
208/230-
3-60
DD-STD 26 30 26 94 28 40 28 96 31 40 32 99 33 45 34 101
MED 24/24 30/30 23/23 123 26/26 30/30 26/25 125 29/29 40/40 29/29 128 31/31 40/40 31/31 130
HIGH 27/27 40/40 27/27 159 29/29 40/40 29/29 161 32/32 45/45 33/33 164 34/34 45/45 35/35 166
460-3-60
DD-STD 13 15 13 47 14 20 14 48 15 20 15 49 16 20 16 50
MED 12151161131512621415136315201564
HIGH 13 15 13 79 14 20 14 80 15 20 15 81 16 20 17 82
575-3-60
DD-STD 11 15 11 39 13 15 13 41 13 15 13 41 15 20 15 43
MED 9 15 8 4211 15 104410 15 104412 15 1246
HIGH 10 15 9 5712 15 125912 15 115913 15 1461
582J*06
208/230-
1-60
DD-STD 41 60 39 144 42 60 41 146 45 60 44 149 47 60 47 151
MED 40 60 38 174 42 60 41 176 45 60 44 179 47 60 46 181
208/230-
3-60
DD-STD 29 40 28 120 31 45 31 122 34 45 34 125 36 50 36 127
MED 30/30 45/45 30/29 185 32/32 45/45 32/32 187 35/35 50/50 35/35 190 37/37 50/50 37/37 192
HIGH 30/30 45/45 30/29 185 32/32 45/45 32/32 187 35/35 50/50 35/35 190 37/37 50/50 37/37 192
460-3-60
DD-STD 14 20 14 58 15 20 15 59 16 20 16 60 17 20 17 61
MED 14201490152015911720169218201893
HIGH 14 20 14 90 15 20 15 91 17 20 16 92 18 20 18 93
575-3-60
DD-STD 12 15 12 46 14 15 14 48 13 15 13 48 15 20 16 50
MED 11151064121512661215126614151468
HIGH 11 15 10 64 12 15 12 66 12 15 12 66 14 15 14 68
BRKR – Circuit Breaker
CO – Convenience Outlet
DD – Direct Drive (indoor fan motor)
DISC – Disconnect
FLA – Full Load Amps
IFM – Indoor Fan Motor
LRA – Locked Rotor Amps
MCA – Minimum Circuit Amps
MOCP – MAX FUSE or HACR Breaker
PE – Power Exhaust
PWR CO – Powered Convenience Outlet
UNPWR CO – Unpowered Convenience Outlet
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage =
(224 + 231 + 226)
=
681
= 227
33
% Voltage Imbalance = 100x
4
=1.78%
227
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.
A
B
C
MOTOR
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