INS-88
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
Distances & splitting level distances
Item
Unit
Description
Measure
Liquid side
Gas side
L1, L2
L
Standard
Piping connection diameter on Outdoor Unit
Piping connection diameter on Outdoor Unit
Splitting distance (on Liquid side)
Piping’s standard distance (on Liquid side) for which
no additional charge is required
(*)
Refrigerant pipings
1. Selection of pipings and specifications
• Thermally insulate pipings on Liquid side and Gas side, as according to operation mode, both of them may
reach low temperatures during system’s operation.
• Use close cells’ insulating material, in addition to the material that already wraps the pipings and which is
resistant to temperatures of at least 120°C.
NOTE: For each Indoor Unit to be connected (except for 206 X, 266 X Indoor Units), it is required the use of diameter
adapter
Ø9.52 (3/8”) → Ø12.7 (1/2”)
provided with the Outdoor Unit, to be installed on the corresponding piping
connection (Gas side) of Outdoor Unit (see “Section 3: Outdoor Units & Troubleshooting” of this Service Manual).
Gas side piping
Liquid side piping
Ø6.35 (1/4”)
Ø9.52 (3/8”)
Max. 15m
5m + 5m
(*)
Note:
If splitting distance is more than 5m (Liquid side, one line), additional charge is: 15g/m of R410A.
Ø6.35mm (1/4”) x 0.8mm
I.U. 206 X, 266 X: Ø9.52mm (3/8”) x 0.8mm
I.U. 356 X, 536 X: Ø12.7mm (1/2”) x 0.8mm
HCKU 406 X2
H1
H2
(Example)
Indoor Unit
HFIU 356X
L1
L2
m
m
m
H2
H1
Splitting level distance between O.U. (higher) and I.U.
Splitting level distance between O.U. (lower) and I.U.
Max. 10m
Max. 10m
m
H1+H2
Splitting level distance between I.U. of same system
Max. 5m
(Example)
Indoor Unit
HKEU 266X
4.7.9 Systems with O.U. HCKU 406 X2: Limitations for distances & splitting level distances