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(Two Field Provided Power Supply Circuits to the Chiller. Field Connections to Factory provided Terminal Block (Std)
or Disconnects (Opt) in the Options Panel. Circuit Breaker (opt
Chiller
Field Provided Power Supply
Model
YCAS
Volts
Min NF Over-Current Protection
1
MCA
Disc SW
2
Min.
380
387
400
0250EC
460
320
400
575
257
400
380
477
600
0270EC
460
390
400
575
312
400
380
473
600
0300EC
460
390
400
575
311
400
380
524
600
0330EC
460
429
600
575
342
400
NOTES
1. Minimum circuit ampacity (MCA) is based on 125% of the rated load amps for the largest motor plus 100% of the rated load amps for all
other loads included in the circuit, per N.E.C. Article 430-24. If a Factory Mounted Control Transformer is provided, add the following to
the system #1 MCA values in the YCAS Tables: -17, add 15 amps; -28, add 12 amps; -40, add 7 amps; -46, add 6 amps; -58, add 5 amps.
2. The recommended disconnect switch is based on a minimum of 115% of the summation rated load amps of all the loads included in the
circuit, per N.E.C. 440 - 12A1.
3. Minimum fuse size is based on 150% of the largest motor RLA plus 100% of the remaining RLAs (U.L. Standard 1995, Section 36.1).
Minimum fuse rating = (1.5 x largest compressor RLA) + other compressor RLAs + (# fans x each fan motor FLA).
4. Maximum dual element fuse size is based on 225% maximum plus 100% of the rated load amps for all other loads included in the circuit,
per N.E.C. 440-22. Maximum fuse rating = (2.25 x largest compressor RLA) + other compressor RLAs + (# fans x each fan motor FLA).
5. Minimum circuit breaker is 150% maximum plus 100% of rated load amps included in the circuit, per circuit per U.L. 1995 Fig. 36.2.
Minimum circuit breaker rating = (1.5 x largest compressor RLA) + other compressor RLAs + (# fans x each fan motor FLA).
6. Maximum circuit breaker is based on 225% maximum plus 100% of the rated load amps for all loads included in the circuit, per circuit,
per U.L. 1995 Fig. 36.2. Maximum circuit breaker rating = (2.25 x largest compressor RLA) + other compressor RLAs + ( # fans x each
fan motor FLA).
4
ELECTRICAL DATA (60 Hz)
60 Hz MULTIPLE POINT POWER SUPPLY CONNECTION
Factory Provided (Lugs) Wire Range
13
Standard
3, 5
Max.
4, 6
Terminal block
450
500
(1)1/0-(2)4/0AWG
400
400
(1)1/0-(2)4/0AWG
300
350
(1)1/0-(2)4/0AWG
600
700
(2) 2AWG-300kcm (2) 250-500kcm 155
450
500
(1)1/0-(2)4/0AWG
350
450
(1)1/0-(2)4/0AWG
600
600
(2) 2AWG-300kcm (2) 250-500kcm 181
450
500
(1)1/0-(2)4/0AWG
350
400
(1)1/0-(2)4/0AWG
600
700
(2)1/0AWG-500kcm (2) 250-500kcm 197
500
600
(2) 2AWG-300kcm (2) 250-500kcm 163
400
500
(1)1/0-(2)4/0AWG
10
) in each of the two Motor Control Centers.)
Electrical System #1 Field Supplied Wiring
7
Compressor #1
Optional NF
RLA Y-∆ LRA XL-LRA RLA Y-∆ LRA XL-LRA Qty FLA (ea) LRA (ea)
Disc. Switch
250-500 kcm
155
343
1,093
250-500 kcm
128
280
893
250-500 kcm
103
224
714
343
1,093
250-500 kcm
128
280
893
250-500 kcm
103
224
714
343
1,093
250-500 kcm
149
280
893
250-500 kcm
119
224
714
343
1,093
280
893
250-500 kcm
130
224
714
Fan
11, 12
Compressor #3
Data
155
343
1,093
8
4.8
128
280
893
8
4.0
103
224
714
8
3.1
227
343
1,093
8
4.8
184
280
893
8
4.0
147
224
714
8
3.1
199
343
1,093
9
4.8
164
280
893
9
4.0
131
224
714
9
3.1
227
343
1,093
9
4.8
184
280
893
9
4.0
147
224
714
9
3.1
YORK INTERNATIONAL
23.0
19.0
15.2
23.0
19.0
15.2
23.0
19.0
15.2
23.0
19.0
15.2
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