Electrical requirements, Installation, Selection procedures – Trane IntelliPak SCWG 020 User Manual
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SCXG-SVX01B-EN
Electrical
Requirements
Selection Procedures
RLA = Rated Load Amps
Compressor LRA = Locked Rotor Amps
Fan Motor LRA = Locked Rotor Amps,
N.E.C. Table 430 - 150
FLA = Full Load Amps, N.E.C.
Table 430 - 150
Voltage utilization range is ±10 percent
Determination of minimum circuit
ampacity (MCA).
MCA = 1.25 x largest motor amps/VFD
amps (FLA or RLA) + the sum of the
remaining motor amps.
Determination of maximum fuse size
(MFS) and maximum circuit breaker size
(MCB).
MFS and MCB = 2.25 x largest motor
amps (FLA or RLA) + the sum of the
remaining motor amps.
If the rating value determined does not
equal a standard current rating of over
current protective device, use the next
lower standard rating for the marked
maximum rating.
For units with the dual power option,
there are two circuits that need calcula-
tions using the formulas above:
circuit #1 - fans
circuit #2 - compressors
If the rating value determined does not
equal a standard current rating of over
current protective device, use the next
lower standard rating for the marked
maximum rating.
Installation
Table I-ER-2. SCWG/SIWG Compressor Motor Data
200V
460V
575V
HP
RLA
LRA
RLA
LRA
RLA
LRA
10
33.1
269
14.4
117
11.5
94
15
46.9
409
20.4
178
16.4
143
Table I-ER-3. SCRG/SIRG Compressor Motor Data
200V
460V
575V
HP
RLA
LRA
RLA
LRA
RLA
LRA
10
38.4
269
16.7
117
13.4
94
15
55.0
409
24.1
178
19.1
143
Table I-ER-4. Fan without VFD
200V
460V
575V
HP
FLA
LRA
FLA
LRA
FLA
LRA
5
16.1
105
6.7
46
5.4
37
7.5
25.0
152
10.8
66
8.2
54
10
32.9
193
14.2
84
11.4
66
15
44.8
290
20.3
126
16.2
102
20
61.0
373
25.0
162
20.0
132
25
74.0
469
31.0
204
24.2
162
Table I-ER-5. Fan with VFD
200V
460V
HP
FLA
LRA
FLA
LRA
7.5
29.0
152
14.3
66
10
38.3
193
18.2
84
15
42.7
290
25.3
126
20
55.2
373
32.0
162
25
67.8
469
32.7
204
Table I-ER-1. Number of Compressors per Unit
SCWG/SIWG 20
25
30
35
SCRG/SIRG
20
25
32
10 HP
2
2
1
-
15 HP
-
-
1
2
Table I-ER-6. Electric Heat - Single Stage
SCWG/SIWG
SCRG/SIRG
Heat
200V
460V
Size
Size
Kw
Amps
Amps
20
20
16
44.8
19.6
25
25
20
55.6
24.2
30
-
24
66.8
29.0
-
32
26
72.4
31.6
35
-
28
78
34.0
Note:
Electric heat amperage should not be considered when determining minimum circuit ampacity. The current of the
unit in the heating mode will not exceed the current of the unit in the cooling mode.