2-7
Design of W-2WAY ECO-i SYSTEM Unit Specifications
Table 1-7 Amount of Refrigerant Charge
Liquid tubing size Amount of refrigerant
charge/m (g/m)
ø6.35 26
ø9.52 56
ø12.7 128
ø15.88 185
ø19.05 259
ø22.22 366
Table 1-8 Outdoor Unit Tubing Connection Size ( A– C) Unit: mm
Balance tube
Liquid tube
Gas tube
kW 22.4 28.0 33.5 40.0 45.0
Gas tubing
ø19.05 ø22.22 ø25.4 ø 28.58
Brazing connection
Liquid tubing
ø9.52 ø12.7
Flare connection
Balance tubing
ø6.35
Flare connection
Table 1-9 Indoor Unit Tubing Connection Size
Indoor unit type 7 9 12 16 18 25 36 48 76 96
Gas tubing (mm) ø12.7 ø15.88 ø19.05 ø22.22
Liquid tubing (mm) ø6.35 ø9.52
Note: Use C1220T-1/2H material for tubing over ø22.22.
Table 1-10 Refrigerant tubing (Existing tubing can be used.)
Tubing size (mm)
* When bending the tubes, use a
bending radius that is at least 4 times
the outer diameter of the tubes.
In addition, take sufficient care to
avoid crushing or damaging the tubes
when bending them.
Material O Material 1/2H
g
H
ø6.35 t0.8 ø22.22 t1.0
ø9.52 t0.8 ø25.40 t1.0
ø12.7 t0.8 ø28.58 t1.0
ø15.88 t1.0 ø31.75 t1.1
ø19.05 over t1.0 ø38.10 over t1.15
ø41.28 t1.20
1. Model Selecting and Capacity Calculator
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