INS-90
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
Item
Unit
Description
Measure
L1, L2, L3
L
Standard
Ø6.35 (1/4”)
Ø9.52 (3/8”)
Max. 15m
5m + 5 m + 5m
HCKU 606 X3
H2
H1
H3
(Example)
Indoor Unit
HKEU 266 X
L1
L2
L3
m
m
H1, H2, H3
H1+H3, H2+H3
Max. 10m
m
Max. 5m
(Example)
Indoor Unit
HTFU 266 X
(Example)
Indoor Unit
HKEU 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
4.7.11 Systems with O.U. con HCKU 606 X3: Limitations for distance & splitting level distances
Distances 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
(*)
NOTE: For each Indoor Unit to be connected (except for 206 X, 266 X Indoor Units), use is required of one of 2 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).
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.