Installation manual

IM 1029-2 Magnitude™ Frictionless Centrifugal Chillers – Model WMC 31
Electrical Data
General Note: The RLA for use in the following tables is obtained by the selection of a specific unit by
Daikin. When shipped, a unit will bear the specific RLA, stamped on the nameplate, for the selected operating
conditions.
!
CAUTION
The RLA stamped on the unit may be lower than the minimum shown in the following tables, in which case the
minimum table value must be used for wire sizing.
Table 7, Electrical Acronyms and Notes
ACRONYMS:
DS Disconnect switch
LRA Locked rotor amps
N/A Not available
MCA Minimum circuit ampacity
MOP Maximum overcurrent protection
PB Power block
RLA Rated load amps
NOTES:
1
In all cases, a disconnect switch is supplied for each compressor circuit.
2 RLA and LRA data is for each compressor
3 Wire size per NEC 2008, table 310.16, 75° C, copper
4 MOP size per NEC 2008, section 440.22(a) for air conditioning and refrigeration equip.
W
MC 145S, Single Compressor
Table 8, WMC 145S-B, 3/60/460
SINGLE POINT CONNECTION, STANDARD
COMPRESSOR CHILLER
RLA
[Amp]
LRA
[Amp]
QTY
MCA
[Amp]
MOP
[Amp]
DISC.
SWT.
[Amp]
POWER
BLOCK
[Amp]
WIRE
QTY
WIRE
GAUGE
79 to 80
110
1
99 to 100
175
150
N/A
3
3 GA
81 to 88
110
1
101 to 110
175
150
3
2 GA
89 to 92
110
1
111 to 115
200
150
3
2 GA
93 to 99
110
1
116 to 123
200
150
3
1 GA
100
110
1
125
225
150
3
1 GA
101 to 104
132
1
126 to 130
225
200
3
1 GA
105 to 111
132
1
131 to 138
225
200
3
1/0
112 to 120
132
1
140 to 150
250
200
3
1/0
121 to 133
154
1
151 to 166
250
225
3
2/0
134 to 140
154
1
167 to 175
300
225
3
2/0
141 to 150
165
1
176 to 187
300
225
3
3/0