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PMEN0643 rev.0 - 04/2023

REFRIGERANT AND WATER PIPING

Refrigerant and water piping

5.1 General notes before performing piping work ...............................................17

5.2 R32 Refrigerant circuit ..................................................................................... 17

5.2.1 General notes R32 refrigerant ............................................................... 17

5.2.2 Refrigerant piping ..................................................................................18

5.2.3 Refrigerant charge .................................................................................20

5.2.3.1 Refrigerant charge amount ......................................................20

5.2.3.2 Refrigerant charge before shipment (W

(kg)) .........................20

5.3 Water piping ....................................................................................................20

5.3.1 Water piping length ...............................................................................20

5.3.2 Water piping size ...................................................................................20

5.3.3 Water quality for primary (space heang / cooling) and secondary

(DHW) circuit..........................................................................................21

5.3.3.1 Water lling ..............................................................................22

5.3.4 Requirements and recommendaons for the hydraulic circuit ............25

5.3.5 Water ow control .................................................................................26

5.4 Space heang and DHW ..................................................................................26

5.4.5.1 Addional hydraulic necessary elements for space heang ...26

5.4.5.2 Addional hydraulic oponal elements (For DHW) .................29

Hitachi YUTAKI S Series Installation And Operation Manual

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