3 Piping work and
refrigerant charge
77
SMGB0064 rev.0 - 08/2011
3
3.4.3 Refrigerant piping selection
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.
Piping connection size of outdoor unit, indoor unit and distributor
Outdoor Unit
Pipe Size Multikit & Distributor
Liquid Piping Gas Piping Twin Triple Quad
RAS-2HVRN2 — — — — —
RAS-2.5HVRN2 — — — — —
RAS-3HVRNS2 Ø9.53 Ø15.88 TE-03N — —
RAS-4H(V)RNS2E Ø9.53 Ø15.88 TE-04N — —
RAS-5H(V)RNS2E Ø9.53 Ø15.88 TE-56N — —
RAS-6H(V)RNS2E Ø9.53 Ø15.88 TE-56N TRE-06N —
RAS-8HRNSE Ø9.53 Ø25.4 TE-08N TRE-810N
TE-08N +
TE-04N +
TE-04N
RAS-10HRNSE
Ø9.53
(*2)
Ø25.4 TE-08N —
TE-08N +
TE-56N +
TE-56N
N O T E
The sizes of the indoor and outdoor units are different. Adjust the are adapter (accessories) to the joint part of
the indoor piping.
Piping connection size of indoor units
Indoor Unit Gas piping size (mm) Liquid piping size (mm)
1.5HP 12.7 6.35
2HP 15.88 6.35
2.5–6HP 15.88 9.53
8HP* 19.05→25.4 (1*) 9.53
10HP* 22.2→ 25.4 (1*) 9.53 (2*)
N O T E
If using different piping from the standard values, piping reducers will be supplied by the installer.
• (*1) Ø19.05→ Ø25.4 and Ø22.2→ Ø25.4 indoor pipe adapters are factory supplied with the indoor unit.
• (*2) Change the liquid piping size to Ø12.7 when the piping length is more than 30 m. Indoor unit pipe adapter
is factory supplied with the indoor unit.
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