Mitsubishi Electric CITY MULTI PEFY-P22VMS-E-S Data Book page 312

CITY MULTI
SYSTEM DESIGN Y SERIES
1. Electrical work.................................................................................................................................................. 4 - 36
1-1.General cautions ....................................................................................................................................... 4 - 36
1-2.Power supply for Indoor unit and Outdoor unit .......................................................................................... 4 - 37
1-3.Power cable specifications ........................................................................................................................ 4 - 39
1-4.Power supply examples............................................................................................................................. 4 - 40
2. M-NET control.................................................................................................................................................. 4 - 41
2-1.Transmission cable length limitation.......................................................................................................... 4 - 41
2-2.Transmission cable specifications ............................................................................................................. 4 - 42
2-3.System configuration restrictions............................................................................................................... 4 - 43
2-4.Address setting.......................................................................................................................................... 4 - 46
3. Piping Design................................................................................................................................................... 4 - 56
3-1.R410A Piping material............................................................................................................................... 4 - 56
3-2.Piping Design ............................................................................................................................................ 4 - 57
3-3.Refrigerant charging calculation ................................................................................................................ 4 - 58
4. Outdoor Installation.......................................................................................................................................... 4 - 59
4-1.Requirement on installation site ................................................................................................................ 4 - 59
4-2.Spacing...................................................................................................................................................... 4 - 60
4-3.Piping direction .......................................................................................................................................... 4 - 62
4-4.Weather countermeasure .......................................................................................................................... 4 - 65
4-5.Caution on selecting outdoor units ............................................................................................................ 4 - 66
5. Installation information..................................................................................................................................... 4 - 67
5-1.General precautions .................................................................................................................................. 4 - 67
5-2.Precautions for Indoor unit ........................................................................................................................ 4 - 68
5-3.Precautions for Fresh air intake type indoor unit ....................................................................................... 4 - 69
5-4.Precautions for Outdoor unit/Heat source unit .......................................................................................... 4 - 69
5-5.Precautions for Control-related items ........................................................................................................ 4 - 70
6. Caution for refrigerant leakage ........................................................................................................................ 4 - 71
6-1.Refrigerant property................................................................................................................................... 4 - 71
6-2.Confirm the Critical concentration and take countermeasure.................................................................... 4 - 71
SYSTEM DESIGN Y SERIES
C7-R Rev.
4 - 35