Hitachi RAS-(4-12)HNP(1)(E) - Maximum Refrigerant Piping Length

3 Piping work and
refrigerant charge
73
SMGB0087 rev.0 - 12/2013
3

Maximum refrigerant piping length
IVX Premium series
(m)
OutdoorUnit 2HP 2.5HP 3HP 4HP 5HP 6HP 8HP 10HP 12HP
Maximumpipinglength
betweentheoutdoorunit
andthefarthestindoor
unit
ActualLength(L) 50 75 100
EquivalentLength(EL) 70 95 125
Totalpipinglength
2units(A+B+C) 50 60 85 100 115
3units(A+B+C+D) -- 60 95 100 130
4units(A+B+C+D+E+F) -- 95 100 145
Maximumpipinglineafter
rstbranch
4and3units(B+C+D) 10 15
4units(B+D,B+E,C+F,
C+G)
-- 10 15
MainpipinglengthA A > B, C, D, E, F, G
MaximumheightdifferenceOutdoor/Indoor(H)
(OutdoorUnitisHigher/Lower.)
30 / 20
MaximumheightdifferenceIndoor/Indoor 3 10
Maximumheightdifference:
branchpipe/Indoor(2,3and4indoorunitssystem)
branchpipe/branchpipe(4indoorunitssystem)
3
Maximumlengthdifferenceoftheseveralbranches:
(B-C)(2and3unitsystem)
(B-D)(3unitsystem)
(C-D)(3unitsystem)
(C+G)-(C+F)(4unitsystem)
(B+E)-(B+D)(4unitsystem)
(C+G)-(B+E)(4unitsystem)
(C+G)-(B+D)(4unitsystem)
(C+F)-(B+E)(4unitsystem)
(C+F)-(B+D)(4unitsystem)
< 8