Piping System For Line Branch - Hitachi RAS-2-HVNP Service Manual

3. Piping work and refrigerant charge
3.3.3 Piping system for line branch
OU
IU IVX Premium
quantity
IVX Standard
allowed
  
Maximum refrigerant piping length (Line branch system)
IVX Premium series
Outdoor Unit
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)
Total piping length L4 + (L3
Maximum height difference
Outdoor / Indoor (H)
(Outdoor Unit is Higher / Lower.)
Maximum height Difference Indoor / Indoor
Maximum height difference:
Branch pipe/Indoor
Branch pipe/branch pipe
IVX Standard series
Outdoor Unit
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)
Total piping length L4 + (L3
Maximum height difference
Outdoor / Indoor (H)
(Outdoor Unit is Higher / Lower.)
Maximum height Difference Indoor / Indoor
Maximum height difference:
Branch pipe/Indoor
Branch pipe/branch pipe
65
3 HP 4 HP
2 -3 2 - 5
--
Actual Length (L1)
Equivalent Length (EL)
+L3 +L3 ....)
1 2 3
Actual Length (L1)
Equivalent Length (EL)
+L3 +L3 ....)
1 2 3
SMGB0079 rev.0 - 01/2013
5 HP 6 HP 8 HP
2 - 6
2 - 4
3HP 4HP 5HP
50 75
70 95
20 30
10
60 95
4HP 5HP 6HP
70 75
90 95
20
10
70 75
10 HP 12 HP
2 - 8
(picture is as example)
(m)
6HP 8HP 10HP 12HP
100
125
40
15
100 145
30 / 20
10
3
(m)
8HP 10HP 12HP
100
125
25
15
100 145
30 / 20
3
3
3