Hitachi RAS-(3-6)HVNC1(E) - Piping System for Line Branch

3 Piping work and
refrigerant charge
75
SMGB0087 rev.0 - 12/2013
3
3.3.3 Piping system for line branch
OU 3HP 4HP 5HP 6HP 8HP 10HP 12HP
IUquantityallowed
IVXPremium 2 -3 2 - 5 2 - 6 2 - 8
IVXStandard -- 2 - 4
(picture is as example)

Maximum refrigerant piping length (Line branch system)
IVX Premium series
(m)
OutdoorUnit 3HP 4HP 5HP 6HP 8HP 10HP 12HP
Maximumpipinglengthbetweenthe
outdoorunitandthefarthestindoor
unit
ActualLength(L1) 50 75 100
EquivalentLength(EL) 70 95 125
Maximumpipinglengthfromrstbranchtoeachindoorunit(L2) 20 30 40
Maximumpipinglengthfrombranchtoindoorunit(L3) 10 15
TotalpipinglengthL4+(L31+L32+L33....) 60 95 100 145
MaximumheightdifferenceOutdoor/Indoor(H)
(OutdoorUnitisHigher/Lower.)
30 / 20
MaximumheightDifferenceIndoor/Indoor 10
Maximumheightdifference:
Branchpipe/Indoor
Branchpipe/branchpipe
3
IVX Standard series
(m)
OutdoorUnit 4HP 5HP 6HP 8HP 10HP 12HP
Maximum piping length between the outdo-
or unit and the farthest indoor unit
Actual Length (L1) 70 75 100
Equivalent Length (EL) 90 95 125
Maximum piping length from rst branch to each indoor unit (L2) 20 25
Maximum piping length from branch to indoor unit (L3) 10 15
Total piping length L4 + (L31+L32+L33....) 70 75 100 145
Maximum height difference Outdoor / Indoor (H)
(Outdoor Unit is Higher / Lower)
30 / 20
Maximum height Difference Indoor / Indoor 3
Maximum height difference:
Branch pipe/Indoor
Branch pipe/branch pipe
3