Hitachi RAS-8HNCE - Page 30

18
Refrigerant piping & refrigerant charge
PMML0317A rev.1 - 11/2013

Maximum refrigerant piping length
IVX Premium series
(m)
Outdoor Unit 3HP 4HP 5HP 6HP 8HP 10HP
Maximum piping Length be-
tween 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) 60 85 100 115
3 units (A+B+C+D) -- 95 100 130
4 units
(A+B+C+D+E+F+G+)
-- 95 100 145
Maximum piping line
after rst branch
2 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 10
Maximum height difference:
branch pipe/Indoor (2, 3 and 4 units system)
branch pipe/branch pipe (4 units system)
3
(B-C) / (B-D) / (C-D) / (C+G)-(B+E) / (C+G)-(B+D)
(C+F)-(B+E) / (C+F)-(B+D)
< 8
IVX Standard series
(m)
Outdoor Unit 8HP 10HP
Maximum piping Length
between the outdoor unit
and the farthest indoor
unit
Actual Length (L) 100
Equivalent Length (EL) 125
Total piping length
2 units (A+B+C) 100 115
3 units (A+B+C+D) 100 130
4 units
(A+B+C+D+E+F+G+)
100 145
Maximum piping line
after rst branch
2 and 3 units (B, C, D) 15
4 units
(B+D, B+E, C+F, C+G)
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
Maximum height difference:
branch pipe/Indoor (2, 3 and 4 units system)
branch pipe/branch pipe (4 units system)
3
(B-C) / (B-D) / (C-D) / (C+G)-(B+E) / (C+G)-(B+D)
(C+F)-(B+E) / (C+F)-(B+D)
< 8