Hitachi UTOPIA IVX PREMIUM Series Installations- Und Betriebshandbuch Seite 28

Refrigerant piping & refrigerant charge
Example for line branch

OU
IU IVX Premium
quantity
IVX Standard
allowed
Maximum refrigerant piping length (Line branch system)

IVX Premium series
Maximum piping length between
the outdoor unit and the farthest
indoor unit
Maximum piping length from first branch to each indoor unit (L2)
Maximum piping length from branch to indoor unit (L3)
Maximum piping length L4 + (L3
Maximum height Difference Indoor / Indoor
IVX Standard series
Maximum piping length
between the outdoor unit
and the farthest indoor
unit
Maximum piping length from first branch to each indoor unit (L2)
Maximum piping length from branch to indoor unit (L3)
Maximum piping length L4 + (L3
Maximum height Difference Indoor / Indoor
28
_PMML0251A_r2.indb 28
3 HP 4 HP
2 -3 2 - 5
--
Outdoor Unit
Actual Length (L1)
Equivalent Length (EL)
+L3 +L3 ....)
1 2 3
Maximum height difference
Outdoor / Indoor (H)
(Outdoor Unit is Higher / Lower.)
Maximum height difference:
Branch pipe/Indoor
Branch pipe/branch pipe
Outdoor Unit
Actual Length (L1)
Equivalent Length (EL)
+L3 +L3 ....)
1 2 3
Maximum height difference
Outdoor / Indoor (H)
(Outdoor Unit is Higher / Lower.)
Maximum height difference:
Branch pipe/Indoor
Branch pipe/branch pipe
PMML0251A rev.2 - 02/2013
5 HP 6 HP 8 HP
2 - 6
2 - 4
3HP 4HP
50
70
20
10
60
4HP 5HP
70 75
90 95
20
10
70 75
10 HP
2 - 8
(picture is as example)
(m)
5HP 6HP 8HP 10HP
75 100
95 125
30 40
15
95 100 145
30 / 20
10
3
(m)
6HP 8HP 10HP
100
125
25
15
100 145
30 / 20
3
3
06/02/2013 9:05:05