Hitachi UTOPIA RAS-4 Series - Page 7

General Index
TCGB0136 rev.1 - 05/2021
V
5. Acoustic characteristic curves ............................................................................... 61
5.1 Overall sound level ................................................................................................................................62
5.2 Sound pressure curves .........................................................................................................................63
5.3 Sound power curves..............................................................................................................................65
6. Working range .......................................................................................................... 67
6.1 Working range ....................................................................................................................................... 68
6.1.1 Power supply ................................................................................................................................................. 68
6.1.2 Temperature working range ........................................................................................................................... 68
6.1.3 Special DSW conguration for low ambient temperature (-15ºC) - only for simultaneous operation mode
units (UTOPIA Prime) .............................................................................................................................................. 69
7. General dimensions ................................................................................................. 71
7.1 Dimensions............................................................................................................................................72
7.1.1 RAS-3HVRC2 ................................................................................................................................................ 72
7.1.2 RAS-(4-6)H(V)(R/N)(C/P)2E ......................................................................................................................... 73
7.2 Service space ........................................................................................................................................74
7.2.1 Basic sizes .................................................................................................................................................... 74
7.2.2 RAS-3HVRC2 ................................................................................................................................................ 75
7.2.3 RAS-(4-6)H(V)(R/N)(C/P)2E ......................................................................................................................... 77
8. Refrigerant cycle ...................................................................................................... 79
8.1 General notes ........................................................................................................................................80
8.2 RAS-3HVRC2........................................................................................................................................80
8.3 RAS-(4-6)H(V)(R/N)(C/P)2E .................................................................................................................81
9. Piping work and refrigerant charge ....................................................................... 83
9.1 Refrigerant pipe selection......................................................................................................................84
9.1.1 Pipe size selection ......................................................................................................................................... 84
9.1.2 Multikit or distributor selection ....................................................................................................................... 84
9.2 Refrigerant piping range ........................................................................................................................84
9.2.1 Refrigerant piping length ............................................................................................................................... 84
9.2.2 Piping system for header branch ................................................................................................................... 85
9.2.3 Maximum lenght of refrigerant piping ............................................................................................................ 86
9.2.4 Combinations of piping size and piping length .............................................................................................. 88
9.2.5 Refrigerant piping size and multikit/distributor ............................................................................................... 88
9.3 Copper pipes, sizes and connection .....................................................................................................90
9.3.1 Copper pipes and sizes ................................................................................................................................. 90
9.3.2 Insulation ....................................................................................................................................................... 91