Hitachi YUTAKI M RASM-3WF2E Installation And Operation Manual page 4

5.2 Hydraulic Connections .....................................................................................20
5.3 Space heating and DHW .................................................................................22
5.3.1 Additional hydraulic necessary elements for space heating ................22
5.3.2 Additional hydraulic necessary elements for DHW ..............................23
5.3.3 Additional hydraulic optional elements (for DHW) ...............................25
5.3.4 Requirements and recommendations for the hydraulic circuit ............26
5.3.5 Anti-freezing protection for water circuit .............................................27
5.3.6 Glycol as anti-freezing protection .........................................................27
5.3.7 Insulation ...............................................................................................29
5.3.8 Water filling ...........................................................................................30
5.3.9 Water quality .........................................................................................32
5.4 Minimum water volume description ...............................................................33
5.5 Water piping ....................................................................................................35
5.5.1 Water piping length
5.5.2 Water piping size ...................................................................................36
5.6 Suspension of water piping .............................................................................36
6. Electrical and control settings
6.1 Optional unit wiring for accessories ................................................................39
6.1.1 Summary of the terminal board connections .......................................39
6.1.2 Input terminals (Default input functions) .............................................41
6.2 Setting of DIP switches and RSW switches ......................................................50
6.2.1 Refrigerant cycle PCB .............................................................................51
6.2.1.1 DSW1 .......................................................................................51
6.2.1.2 DSW2 ........................................................................................52
6.2.1.3 DSW3 ........................................................................................52
6.2.1.4 DSW4 / RSW1 ...........................................................................52
PMEN0657 rev.0 - 02/2024
.........................................................................35
..................................................................................37
II
III