2-6
Design of W-2WAY ECO-i SYSTEM Unit Specifications
1
2
3
4
5
6
7
8
1-4 Tubing Size
Table 1-5 Main Tubing Size (LA) Unit: mm
kW 22.4 28.0 33.5 40.0 45.0 50.4 56.0 61.5 68.0 73.0 78.5 85.0 90.0 96.0
Total system
horsepower
8 10 121416182022242628303234
Combined outdoor units 8 10 12 14 16
10
8
10
10
12
10
14
10
16
10
16
12
16
14
16
16
14
10
10
Gas tubing (mm) ø19.05 ø22.22 ø25.40 ø28.58 ø31.75
Liquid tubing (mm) ø9.52 ø12.70 ø15.88 ø19.05
kW 101.0 106.5 113.0 118.0 123.5 130.0 135.0
Total system
horsepower
36 38 40 42 44 46 48
Combined outdoor units
16
10
10
16
12
10
16
14
10
16
16
10
16
16
12
16
16
14
16
16
16
Gas tubing (mm) ø38.10
Liquid tubing (mm) ø19.05
*1: If future extension is planned, select the tubing diameter based on the total horsepower after extension.
However extension is not possible if the resulting tubing size is two ranks higher.
*2: The balance tube (outdoor unit tube) diameter is ø6.35.
*3: Type 1 tubing should be used for the refrigerant tubes.
*4: If the length of the longest tube (L1) exceeds 90 m (equivalent length), increase the main tube (LM) size by 1 rank for the
gas and liquid tubes. (Use field-supply reducers.) (Select from Table 1-5 and Table 1-9.)
*5: If the longest main tube length (LM) exceeds 50 m, increase the main tube size at the portion before 50 m by 1 rank for the
gas tubes.
(For the portion that exceeds 50 m, set based on the main tube sizes (LA) listed in the table above.)
Size of tubing (LO) between outdoor units
Select the size of tubing between outdoor units based on the main tubing size (LA) as given in the table above.
Table 1-6 Main Tubing Size After Distribution (LB, LC...)
Unit: mm
hp = horsepower
Total capacity after
distribution
Below kW
7.1
(2.5 hp)
16.0
(6 hp)
22.5
(8.1 hp)
30.0
(11 hp)
42.0
(15 hp)
52.4
(19 hp)
70.0
(25 hp)
98.0
(35 hp)
–
Over kW –
7.1
(2.5 hp)
16.0
(6 hp)
22.5
(8.1 hp)
30.0
(11 hp)
42.0
(15 hp)
52.4
(19 hp)
70.0
(25 hp)
98.0
(35 hp)
Tubing size
Gas tubing (mm) ø12.7 ø15.88 ø19.05 ø22.22 ø25.4 ø28.58 ø28.58 ø31.75 ø38.1
Liquid tubing (mm) ø9.52 ø9.52 ø9.52 ø9.52 ø12.7 ø12.7 ø15.88 ø19.05 ø19.05
Note: In case the total capacity of connected indoor units exceeds the total capacity of the outdoor units, select the main tubing
size for the total capacity of the outdoor units. (Especially the main tubing segments of LA, LB and LF.)
1. Model Selecting and Capacity Calculator
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