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Installation Instructions
12
The shorter the refrigerant piping length is, the better. So the connecting pipe should be as short as possible.
1. Piping Requirement
2. Piping Material
(1) Prepare locally-supplied copper pipes.
(2) Select clean copper pipes. Make sure there is no dust and moisture inside the pipes. Blow the inside of the
pipes with nitrogen or dry air, to remove any dust or foreign materials before connecting pipes.
Additional Refrigerant Charge
The unit has been filled with refrigerant.
The outdoor unit is pre-charged with refrigerant to accommodate a total piping length of 5m.
Additional refrigerant (R32) is required for extending the piping beyond 5m:
For 18K: Additional refrigerant charge =(L-5)×15g/m
For 24K/36K/42K/48K: Additional refrigerant charge =(L-5)×35g/m
Refrigerant Piping
Model
Outer Diameter of Pipe (mm)
Gas
Liquid
18K
Φ12.7
Φ6.35
24K/36K/42K/48K
Φ15.88
Φ9.52
Pipe length L
Height difference H
Indoor unit
Outdoor unit
(3)Piping thickness and material are shown as below.
Model
Min. Pipe
length (L)
Max. Pipe
length (L)
Max. Height
difference (H)
18K/24K
3(m)
30(m)
20(m)
36K/42K/48K
3(m)
50(m)
30(m)
15.88
1.0
1.0
19.05
0.8
0.8
0.8
12.7
9.526.35
Diameter
Thickness
(mm)
1.0
22.22
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