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
5
82J*04
208/230-
1-60
DD-STD
30
45
29
88
32
45
31
90
34
50
34
93
36
50
36
95
MED
27
40
26
93
29
45
28
95
32
45
31
98
34
45
34
100
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
11
15
10
57
12
15
11
58
13
15
13
59
14
15
14
60
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
58
2J*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
12
15
11
61
13
15
12
62
14
15
13
63
15
20
15
64
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
42
11
15
10
44
10
15
10
44
12
15
12
46
HIGH
10
15
9
57
12
15
12
59
12
15
11
59
13
15
14
61
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
14
20
14
90
15
20
15
91
17
20
16
92
18
20
18
93
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
11
15
10
64
12
15
12
66
12
15
12
66
14
15
14
68
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
3
3
% 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
