20
Refrigerant piping & refrigerant charge
PMML0317A rev.1 - 11/2013
IVX Standard series
(m)
Outdoor Unit 8HP 10HP
Maximum piping length
between the outdoor unit
and the farthest indoor
unit
Actual Length (L1) 100
Equivalent Length (EL) 125
Maximum piping length from rst branch to each indoor unit (L2) 25
Maximum piping length from branch to indoor unit (L3) 15
Maximum piping length L4 + (L3
1
+L3
2
+L3
3
....) 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
13.4.1 Refrigerant piping size and multikit/distributor
Select the piping connection sizes according to the following procedures:
• Between outdoor unit and branch pipe: Select the same pipe connection size as the pipe size of the outdoor unit.
• Between branch pipe and indoor unit: Select the same pipe connection size as the pipe size of the indoor unit.
1 indoor unit system
(mm)
Outdoor Unit HP
Pipe Size (L)
Gas Liquid
2 / 2.5 Ø12.70 Ø6.35
3 - 6 Ø15.88 Ø9.52
8 Ø25.40 Ø9.52
10 Ø25.40 Ø12.70
2 indoor units system
(mm)
Outdoor Unit HP
Pipe Size (A) Branch pipe
Gas Liquid IVX Series ES Series
2 / 2.5 Ø12.70 Ø6.35 TE-03N1 -
3 / 4 Ø15.88 Ø9.52
3HP:TE-03N1
4HP:TE-04N1
4 HP: TE-04N1
5 / 6 Ø15.88 Ø9.52 TE-56N1- -
8 Ø25.40 Ø9.52 TE-08N -
10 Ø25.40 Ø12.70 TE-10N -
(mm)
Indoor Unit capacity
Pipe Size (B, C)
Gas Liquid
≤ 1.5 HP Ø12.70 Ø6.35
1.8/2.0HP Ø15.88 Ø6.35
≥ 2.3 HP Ø15.88 Ø9.52
Connections including Indoor Units 8 and 10 HP are not
possible
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