Technical Information

Piping work and
refrigerant charge
TCGB0079 rev.0 - 01/2013
115

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 + (L3
1
+L3
2
+L3
3
....)
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
outdoor 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 + (L3
1
+L3
2
+L3
3
....)
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
9.2.4 Combinations of piping size and piping length
IVX Premium series
Liquid Ø6.35 Ø9.52 Ø12.70 Ø15.88
Gas
Ø9.52 Ø12.70 Ø15.88 Ø19.05 Ø12.70 Ø15.88 Ø19.05 Ø22.20 Ø25.40 Ø15.88 Ø19.05 Ø22.20 Ø25.40 Ø28.60 Ø22.20 Ø25.40 Ø28.60
Performance
capacity (m)
2 HP 15
(1)
50 30 - 15
(3)
15
(3)
- - - - - - - - - - -
2.5 HP - 50 30 - 20
(3)
20
(3)
- - - - - - - - - - -
3 HP -
30
(1)(2)
30
(2)
- 30
(1)
50 - - - - - - - - - - -
4 - 5 - 6 HP - - 5
(2)
5
(2)
40
(1)
75 50
(4)
- - 30
(3)
30
(3) (4)
- - - - - -
8 HP - - - - - -
50
(1)(4)(6)
50
(1)(6)
70
(5)(7)
-
50
(1)(3)(4)
50
(1)(3)
100 -
50
(1)(3)
50
(3)
-
10 - 12 HP - - - - - - - - - - - 50
(1)
100 50
50
(1)(3)
50
(3)
50
(3)
(1).Reducing gas pipe size will lower cooling capacity due to larger pressure loss in gas piping and narrow operation range.
(2).Reducing liquid pipe size will narrow operation range due to indoor unit relation with expansion valve capacity.
(3).Increasing liquid pipe size will require additional refrigerant charge.
(4).When using Ø19.05 gas pipe (soft-annealed), please switch ON DSW2-4# in the Outdoor Unit PCB.
(5) In case that pipe length exceeds 70m in 8 HP, please use a
Ø12.7 pipe as a liquid pipe.
(6).In case of exceeding the recommended number of connected Indoor Units of 8 HP (more than 5 Units), please use a
Ø12.7 pipe as a liquid
Standard
9
TCGB0079_rev0_11-2012.indb 115 29/01/2013 14:27:29