GENERAL INDEX
6.4
R410A Refrigerant circuit ..................................................................................................................................... 53
6.4.1 Refrigerant piping ........................................................................................................................................................... 53
6.5
Water piping ......................................................................................................................................................... 56
6.5.1 Water piping length......................................................................................................................................................... 56
6.5.2 Water piping size ............................................................................................................................................................ 56
6.5.3 Water quality................................................................................................................................................................... 59
6.5.5 Water flow control ........................................................................................................................................................... 61
6.6
6.6.2 Suspension Of Water Piping .......................................................................................................................................... 62
6.7
Space heating and DHW ...................................................................................................................................... 63
6.7.1 YUTAKI S AND YUTAKI M ............................................................................................................................................. 63
6.7.2 YUTAKI S COMBI........................................................................................................................................................... 66
6.7.3 YUTAKI S80 ................................................................................................................................................................... 69
7.1
General check ...................................................................................................................................................... 72
7.2
Electrical connection ............................................................................................................................................ 76
7.2.1 Wiring size ...................................................................................................................................................................... 76
7.3
7.4
Terminal board connections ................................................................................................................................. 98
7.4.1 Table board 1 .................................................................................................................................................................. 98
7.4.2 Table board 2 for YUTAKI M and YUTAKI S80 ............................................................................................................... 99
7.4.3 Table board 2 for YUTAKI S and YUTAKI S COMBI......................................................................................................110
8.1
Definition of the switches.................................................................................................................................... 125
8.2
Description of the icons ...................................................................................................................................... 126
8.2.1 Common icons ............................................................................................................................................................. 126
8.3
Room thermostat contents ................................................................................................................................. 129
IX
PMML0575 rev.2 - 03/2022