165
CITY MULTI
SYSTEM DESIGN
MEE15K036
SYSTEM DESIGN WY SERIES
1. Electrical work.................................................................................................................................................. 166
1-1.General cautions ....................................................................................................................................... 166
1-2.Power supply for Indoor unit and Heat source unit.................................................................................... 167
1-3.Power cable specifications ........................................................................................................................ 168
1-4.Power supply examples............................................................................................................................. 169
2. M-NET control.................................................................................................................................................. 171
2-1.Transmission cable length limitation.......................................................................................................... 171
2-2.Transmission cable specifications ............................................................................................................. 172
2-3.System configuration restrictions............................................................................................................... 173
2-4.Address setting.......................................................................................................................................... 177
3. Piping Design................................................................................................................................................... 190
3-1.R410A Piping material............................................................................................................................... 190
3-2.Piping Design ............................................................................................................................................ 192
3-3.Refrigerant charging calculation ................................................................................................................ 194
4. Installation........................................................................................................................................................ 196
4-1.Requirement on installation site ................................................................................................................ 196
4-2.Spacing...................................................................................................................................................... 196
4-3.Caution on selecting heat source unit ....................................................................................................... 196
4-4.Piping direction .......................................................................................................................................... 197
5. Installation information..................................................................................................................................... 198
5-1.General precautions .................................................................................................................................. 198
5-2.Precautions for Indoor unit ........................................................................................................................ 199
5-3.Precautions for Fresh air intake type indoor unit ....................................................................................... 200
5-4.Precautions for Outdoor unit/Heat source unit .......................................................................................... 200
5-5.Precautions for Control-related items ........................................................................................................ 201
6. Caution for refrigerant leakage ........................................................................................................................ 202
6-1.Refrigerant property................................................................................................................................... 202
6-2.Confirm the Critical concentration and take countermeasure.................................................................... 202
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