INS-94
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
Item
Unit
Description
Measure
L1, L2, L3, L4
L
Standard
Ø6.35 (1/4”)
Ø9.52 (3/8”)
Max. 15m
5m + 5m + 5m + 5m
HCKU 1066 X4
H2
H1
H4
H3
L1
L4
L2
L3
m
m
H1, H2, H3, H4
H1-H2 (ecc.)
Max. 10m
m
Max. 10m
(Example)
Indoor Unit
HFIU 356 X
(Example)
Indoor Unit
HSFU 536 X
(Example)
Indoor Unit
HRBU 356 X
(Exemple)
Indoor Unit
HRBU 356 X
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
4.7.15 Systems with O.U. HCKU 1066 X4: Limitations for distances & splitting level distances
Distance and splitting level distances
Refrigerant pipings
Liquid side
Gas side
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
(*)
Gas side piping
Liquid side piping
(*)
Note:
If splitting distance is more than 5m (Liquid side, one line), additional charge is: 15g/m of R410A.
Splitting level distance between O.U. and each I.U.
Splitting level distance between I.U. of same system
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), use is required of one of 3 diameter
adapters
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).