Hitachi UTOPIA R32 Series - Refrigerant Piping and Charge

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PMEN0654 rev.0 - 12/2023

REFRIGERANT PIPING AND REFRIGERANT CHARGE

Refrigerant piping and refrigerant charge

5.1 Seleconofthecopperpipes .........................................................................14

5.2 Threeprinciplesonworkwithrefrigerantpipes.............................................14

5.3 Flaredpipes .....................................................................................................15

5.3.1 Seleconoftheconneconwithareng .......................................15

5.3.2 Dimensionsofaredpipe .....................................................................16

5.3.3 Flaredconneconmounng .................................................................16

5.4 Generalinstruconsontheinstallaonofrefrigerantpipes .........................17

5.4.1 Preparingcopperrefrigeraonpipes ....................................................17

5.4.2 Cungcopperrefrigeraonpipes ........................................................19

5.4.3 Bendingcopperpipes ............................................................................19

5.4.4 Brazingcopperrefrigerantpipes ...........................................................20

5.5 Refrigerantpipeinsulaon ..............................................................................21

5.6 SuspensionofRefrigerantPiping ....................................................................22

5.7 Linebranchandheaderbranchinstallaon ...................................................22

5.8 Pipingconneconforoutdoorunit .................................................................23

5.8.1 Outdoorunitstopvalve ......................................................................... 25

5.8.2 Connecngareadapter .......................................................................26

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