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Installation - Electrical
Selection Procedures
•
RLA = Rated Load Amps
•
Compressor LRA = Locked Rotor Amps
•
Compressor Input = VFD drive Input
•
Compressor Output = VFD drive output
•
Voltage utilization range is ±10%
Determination of Minimum Circuit
Ampacity (MCA)
MCA = 1.25 x Largest motor amps/VFD Input + the sum of
the remaining motor amps.
Table 15.
Electrical service sizing data — motors
Tonnage
Model Number
SCWMN025F
25
SCWMN0254
SCWMN030F
Low MCA
30
SCWMN0304
Low MCA
SCWMN035F
Low MCA
35
SCWMN0354
Low MCA
SCWMN04LF
Low MCA
SCWMN040F
40
SCWMN04L4
Low MCA
SCWMN0404
SCWMN05LF
Low MCA
SCWMN050F
50
SCWMN05L4
Low MCA
SCWMN0504
SCWMN06LF
Low MCA
SCWMN060F
60
SCWMN06L4
Low MCA
SCWMN0604
SCWMN07LF
Low MCA
SCWMN070F
70
SCWMN07L4
Low MCA
SCWMN0704
44
Unit Wiring
Nameplate
Voltage
MCA
Voltage
Range
208-230/60/3
187-253
128.0
460/60/3
414-506
86.0
208-230/60/3
187-253
163.0
460/60/3
414-506
81.0
208-230/60/3
187-253
167.0
460/60/3
414-506
81.0
208-230/60/3
187 - 253
186.6
208-230/60/3
187-253
221.6
460/60/3
414 - 506
90.7
460/60/3
414-506
128.2
208-230/60/3
187 - 253
233.4
208-230/60/3
187-253
268.4
460/60/3
414 - 506
113.2
460/60/3
414-506
150.7
208-230/60/3
187 - 253
260.9
208-230/60/3
187-253
295.9
460/60/3
414 - 506
123.4
460/60/3
414-506
160.9
208-230/60/3
187-253
321.8
208-230/60/3
187-253
356.9
460/60/3
414-506
154.2
460/60/3
414-506
191.7
Determination of Max Fuse (MFS) and Max
Circuit Breaker (MCB) Sizes
MFS and MCB = 2.25 x Largest motor amps (RLA)/VFD
input) + the sum of the remaining motor amps.
If the rating value calculation does not equal a standard
over current protective device rating, use the next lower
standard rating as the maximum.
Compressor (EA)
Fixed Speed
MOP Disc Qty
LRA Qty
RLA
211
200
NA
-
-
146
100
NA
-
-
218
200
1
51.28
300
110
100
1
23.1
150
223
200
1
55.77
340
111
100
1
23.72
110
250
200
1
55.77
340
300
225
1
55.77
340
125
100
1
23.72
110
200
125
1
23.72
110
300
250
2
51.28
300
350
300
2
51.28
300
150
125
2
23.1
150
200
150
2
23.1
150
300
300
2
55.77
340
375
300
2
55.77
340
150
150
2
23.72
110
225
175
2
23.72
110
375
350
3
51.28
300
450
375
3
51.28
300
175
175
3
23.1
150
250
200
3
23.1
150
Motor Data
Fan (EA)
Variable Speed
VSD
Max
Qty
kW
FLA
Input (A)
1
84
1
6.15
18.6
1
60
1
6.15
1
56
2
6.15
18.6
1
30
2
6.15
1
56
2
6.15
18.6
1
30
2
6.15
1
56
3
6.15
18.6
1
84
3
6.15
18.6
1
30
3
6.15
1
60
3
6.15
1
56
3
6.15
18.6
1
84
3
6.15
18.6
1
30
3
6.15
1
60
3
6.15
1
56
4
6.15
18.6
1
84
4
6.15
18.6
1
30
4
6.15
1
60
4
6.15
1
56
5
6.15
18.6
1
84
5
6.15
18.6
1
30
5
6.15
1
60
5
6.15
PKG-SVX027D-EN
9
9
9
9
9
9
9
9
9
9
9
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