Hitachi UTOPIA IVX PREMIUM Série Manuel D'installation Et De Fonctionnement page 27

Refrigerant piping & refrigerant charge
Maximum refrigerant piping length

IVX Premium series
Outdoor Unit
Maximum piping Length be-
tween the outdoor unit and
the farthest indoor unit
Total piping length
Maximum piping line
after first branch
Main piping length A
Maximum height difference
Outdoor / Indoor (H)
(Outdoor Unit is Higher / Lower.)
Maximum height difference Indoor / Indoor
Maximum height difference:
branch pipe/Indoor (2, 3 and 4 units system)
branch pipe/branch pipe (4 units system)
(B-C) / (B-D) / (C-D) / (C+G)-(B+E) / (C+G)-(B+D)
(C+F)-(B+E) / (C+F)-(B+D)
IVX Standard series
Outdoor Unit
Maximum piping Length
between the outdoor unit
and the farthest indoor
unit
Total piping length
Maximum piping line
after first branch
Main piping length A
Maximum height difference
Outdoor / Indoor (H)
(Outdoor Unit is Higher / Lower.)
Maximum height difference Indoor / Indoor
Maximum height difference:
branch pipe/Indoor (2, 3 and 4 units system)
branch pipe/branch pipe (4 units system)
(B-C) / (B-D) / (C-D) / (C+G)-(B+E) / (C+G)-(B+D)
(C+F)-(B+E) / (C+F)-(B+D)
N O T E
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 Multikits at the same horizontal level.
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_PMML0251A_r2.indb 27
Actual Length (L)
Equivalent Length (EL)
2 units (A+B+C)
3 units (A+B+C+D)
4 units
(A+B+C+D+E+F+G+)
2 and 3 units (B, C, D)
4 units
(B+D, B+E, C+F, C+G)
Actual Length (L)
Equivalent Length (EL)
2 units (A+B+C)
3 units (A+B+C+D)
4 units
(A+B+C+D+E+F+G+)
2 and 3 units (B, C, D)
4 units
(B+D, B+E, C+F, C+G)
PMML0251A rev.2 - 02/2013
3HP 4HP 5HP 6HP
50 75
70 95
60 85
-- 95
-- 95
10
-- 10
A > B, C, D, E, F, G
30 / 20
10
3
< 8
4HP 5HP 6HP
70 75
90 95
80 85
90 95
90 95
10
10
A > B, C, D, E, F, G
30 / 20
3
3
< 8
(m)
8HP 10HP
100
125
100 115
100 130
100 145
15
15
(m)
8HP 10HP
100
125
100 115
100 130
100 145
15
15
06/02/2013 9:05:04