12
920-164-02 (10-04)
2) Electrical
A. Grounding
CAUTION:
The unit must be electrically wired and
grounded in accordance with all state and local codes,
national electric code, and NFPA 70. Unit and controls will
NOT operate unless properly grounded. A ground lug is
provided for ground connection. Use only approved copper
wire and connectors from unit to service panel.
B. Power Supply
NOTE:
Line voltage circuit is completely factory wired.
Make all line voltage connections inside circuit breaker
junction box.
Table 4
The circuit breakers or fuses used for branch circuit protection
should be UL recognized. If circuit breakers are used, the
circuit breaker for the compressor circuit must have a UL
HACR rating. If fuses are used, the fuse for the compressor
circuit MUST be time delay type.
CAUTION:
Units are dual voltage rated 208-230/1/60.
The 24V control transformer must be connected for either
208V or 240V power source for proper operation. Line
voltage must not exceed 253V or go below 197V.
The
transformer connection must be changed for 208V
operation.
Depending on auxiliary heater size, unit must be supplied with
2 or 3 separate 208V or 240V circuits from structure’s fuse
box or service panel.Each circuit is internally connected to a
circuit breaker located in the unit control box located at the front
center of the unit. Refer to Table 4 and Table 5 for required
circuits and recommended wire size for each circuit.
DANGER: Electrical shock hazard
. Turn OFF electric
power at the fuse box or service panel before making any
electrical connections and ensure a proper ground connection
is made before connecting line voltage. Failure to do so can
result in property damage, personal injury and/or death.
Air Conditioners
Multiple Circuits
Single Circuit
Factory
Circuit
Breakers
Voltage / Hz / Ph
Voltage
Range
MCA
HACR /
Max Breaker Size
Wire Size (fi eld)
Groung Wire Size (fi eld)
MCA
HACR /
Max
Breaker
Size
Wire Size
(fi eld)
Groung
Wire Size
(fi eld)
Ckt 1
Ckt 2
Ckt 1
Ckt 2
Ckt 1
Ckt 2
Ckt 1
Ckt 2
Ckt 1
Ckt 1
Ckt 1
Ckt 1
VEB18K
00
1
230/208-60-1
198-253
14
N/A
20
N/A
12
N/A
12
N/A
14
20
10
12
05
2
230/208-60-1
198-253
14
27
20
30
12
10
12
10
27
30
10
10
75
2
230/208-60-1
198-253
14
39
20
40
12
8
12
10
40
40
6
10
10
2
230/208-60-1
198-253
14
53
20
60
12
6
12
10
53
60
6
10
VEB24K
00
1
230/208-60-1
198-253
16
N/A
20
N/A
10
N/A
10
N/A
16
20
10
10
05
2
230/208-60-1
198-253
16
27
20
30
10
10
10
10
27
30
10
10
75
2
230/208-60-1
198-253
16
39
20
40
10
8
10
10
40
45
6
10
10
2
230/208-60-1
198-253
16
53
20
60
10
6
10
10
53
60
6
10
VEB30K
00
1
230/208-60-1
198-253
23
N/A
30
N/A
8
N/A
10
N/A
23
30
8
10
05
2
230/208-60-1
198-253
23
27
30
30
8
10
10
10
27
30
8
10
75
2
230/208-60-1
198-253
23
39
30
40
8
8
10
10
40
45
6
10
10
2
230/208-60-1
198-253
23
53
30
60
8
6
10
10
53
60
6
10
15
2
230/208-60-1
198-253
27
53
30
60
8
8
10
10
80
90
4
8
VEB36K
00
1
230/208-60-1
198-253
28
N/A
40
N/A
8
N/A
10
N/A
28
40
8
10
05
2
230/208-60-1
198-253
28
27
40
30
8
10
10
10
28
40
8
10
75
2
230/208-60-1
198-253
28
39
40
40
8
8
10
10
40
45
6
10
10
2
230/208-60-1
198-253
28
53
40
60
8
6
10
10
53
60
6
10
15
2
230/208-60-1
198-253
28
53
40
60
8
8
10
10
81
90
4
8
VEB42K
00
1
230/208-60-1
198-253
34
N/A
50
N/A
6
N/A
10
N/A
34
50
6
10
10
2
230/208-60-1
198-253
34
53
50
60
6
6
10
10
55
60
6
10
15
2
230/208-60-1
198-253
34
53/27
50
60/30
6
6/8
10
10/10
82
90
4
8
VEB49K
00
1
230/208-60-1
198-253
36
N/A
50
N/A
6
N/A
10
N/A
41
60
6
10
15
3
230/208-60-1
198-253
36
53/27
50
60/30
6
6/8
10
10/10
82
90
4
8
20
3
230/208-60-1
198-253
36
53/53
50
60/60
6
6/6
10
10/10
108
110
2
4
VEB60K
00
1
230/208-60-1
198-253
48
N/A
70
N/A
4
N/A
8
N/A
48
70
4
8
20
3
230/208-60-1
198-253
48
53/53
70
60/60
4
6/6
8
10/10
108
110
2
4
25
4
230/208-60-1
198-253
48
53/53/27
70
60/60/30
4
6/6/8
10
10/10/10
N/A
N/A
N/A
N/A
Summary of Contents for VERT-I-PAK B-SERIES
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