Hitachi UTOPIA R32 Series - Page 38

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PMEN0654 rev.0 - 12/2023
6
RAS-(2-3)HVRC3
REFRIGERANT PIPING LENGTH
◆ Maximum refrigerant piping length
Outdoor Unit 2 HP 2.5 HP 3 HP
Maximum piping length between the
outdoor unit and the farthest indoor unit
Actual length (L) 50 50 50
Equivalent length (EL) 70 70 70
Total piping length 2 units (A+B+C) -- -- 50
Maximum piping line aer rst branch 2 units (B, C) -- -- 15
Main piping length A -- -- A > B, C
Maximum height dierence, Outdoor / Indoor (H)
(Outdoor Unit is higher / lower)
30 / 20 30 / 20 30 / 20
Maximum height dierence Indoor / Indoor -- -- 3
Maximum height dierence: Branch pipe/indoor 2 indoor units system -- -- 3
Maximum length dierence of the several branches: (B-C) (2 unit system) -- -- < 8
 NOTE
• The liquid piping and the gas piping must be of the same piping length and run along the same
route.
• Install the branch piping as much as possible near the indoor units.
• Install Mul-Kits at the same horizontal level.