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Electrical Requirements
Important recommendation
Do not bundle or run interconnection wiring in parallel with or
in the same conduit with any high-voltage wires (110 V or
greater). Exposure of interconnection wiring to high-voltage
wiring, inductive loads, or RF transmitters may cause radio
frequency interference (RFI). In addition, improper separation
may cause electrical noise problems. Therefore, use shielded
wire (Beldon 83559/83562 or equivalent) in applications that
require a high degree of noise immunity. Connect the shield to
the chassis ground and tape at the other end.
Figure 56. Interface power requirements
Line
24 Vac
voltage
Transformer
Table 12. Electric heat kW limits (min/max)
Motor
3
200 V / 60 Hz / 3 PH
6/13
230 V / 60 Hz / 3 PH
6/13
460 V / 60 Hz / 3 PH
6/13
575 V / 60 Hz / 3 PH
6/13
Min airflow (CFM)
1050
Notes: Units drawing less than 100 amps are available with or without door interlocking disconnect. Units drawing more than 100 amps are not available with door interlocking
disconnect.
Units drawing less than 48 amps are available with or without line fusing. Units drawing greater than 48 amps have line fusing as standard.
Units with electric heat must not be run below the minimum cfm listed above.
Heaters available in the following kW increments: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 41, 44, 47, 50, 53, 56, 59, 63, 67,
71, 75, 79, 83, 87, 91, 95, 100, 110, 115, 120.
Fuse Sizes
The standard ampere ratings for fuses and inverse time circuit
breakers are listed in
Table
time circuit breakers with non-standard ampere ratings shall
be permitted provided the rating does not exceed the
maximum fuse size defined on the unit nameplate.
Table 13. Standard fuse sizes (amperes)
15
20
25
30
80
90
100
110
125
300
350
400
450
500
1200
1600
2000
2500
3000
52
Termination board
6
8
6/26
7/28
6/26
7/32
6/24
7/32
6/26
7/34
2100
2800
13. The use of fuse and inverse
35
40
45
50
60
150
175
200
225
600
700
800
1000
4000
5000
6000
Table 11. Electric heat voltage ratings
Unit Voltage
Useful formulas:
kW = (Airflow x Delta T)/K
Delta T = (kW x K)/Airflow
K = 3145 (English)
K = 824.7 (SI)
Heater input current = (kW x 1000)/(Voltage x 1.73)
MCA = Minimum Circuit Ampacity
MOP = Maximum Overcurrent Protection rating or Maximum
fuse size
10
12
14
8/41
10/50
12/50
8/41
10/53
12/59
8/44
10/53
12/63
8/44
10/53
12/63
3500
4200
4900
70
250
Heater Voltage
200
230
460
575
17
21
14/50
17/50
20/47
14/59
17/59
20/56
14/75
17/95
20/95
14/75
17/95
20/95
5950
7350
8750
200
230
460
575
25
30
20/41
20/50
20/120
20/120
10,500
CLCH-SVX009L-EN
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