Hitachi YUTAKI Series - Page 8

GENERAL INDEX
PMML0510 rev.1 - 10/2019
VIII
4.2.3 Swimming pool heating .................................................................................................................................................. 23
4.2.4 Space cooling (Necessary cooling kit) ........................................................................................................................... 23
4.3 R32 Temperature working range .......................................................................................................................... 24
4.3.1 Space heating ................................................................................................................................................................ 24
4.3.2 DHW ............................................................................................................................................................................... 25
4.3.3 Swimming pool heating .................................................................................................................................................. 25
4.3.4 Space cooling (Necessary cooling kit) ........................................................................................................................... 26
4.4 R410A Hydraulic working range ........................................................................................................................... 26
4.4.1 Hydraulic data ................................................................................................................................................................ 26
4.5 R32 Hydraulic working range ............................................................................................................................... 27
4.5.1 Hydraulic data ................................................................................................................................................................ 27
4.5.2 Pump performance curves ............................................................................................................................................. 28
5 REFRIGERANT AND WATER PIPING .......................................................................................35
5.1 R32 Refrigerant circuit.......................................................................................................................................... 35
5.1.1 General notes R32 refrigerant ........................................................................................................................................ 35
5.1.2 Refrigerant piping ........................................................................................................................................................... 35
5.1.3 Refrigerant charge .......................................................................................................................................................... 37
5.2 R410A Refrigerant circuit ..................................................................................................................................... 37
5.2.1 Refrigerant piping ........................................................................................................................................................... 37
5.2.2 Precautions in the event of gas refrigerant leaks ........................................................................................................... 39
5.3 Water piping ......................................................................................................................................................... 41
5.3.1 Water piping length......................................................................................................................................................... 41
5.3.2 Water piping size ............................................................................................................................................................ 41
5.3.3 Water quality................................................................................................................................................................... 44
5.3.4 Water ow control ........................................................................................................................................................... 44
6 ELECTRICAL AND CONTROL SETTINGS ................................................................................45
6.1 General check ...................................................................................................................................................... 45
6.2 Electrical connection ............................................................................................................................................ 49
6.2.1 Wiring size ...................................................................................................................................................................... 49
6.2.2 Minimum requirements of the protection devices ........................................................................................................... 53
6.3 Terminal board connections ................................................................................................................................. 57
6.3.1 Table board 1 .................................................................................................................................................................. 57
6.3.2 Table board 2 .................................................................................................................................................................. 58
7 UNIT CONTROLLER ..................................................................................................................66
7.1 Denition of the switches...................................................................................................................................... 66
7.2 Description of the icons ........................................................................................................................................ 67
7.2.1 Common icons ............................................................................................................................................................... 67