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Installation instructions
Refrigerant piping
1. Piping requirement
Outer Diameter of Pipe [ in. (mm)]
Model
24K
5/8
36K
3/4
48K/60K
7/8
The shorter the refrigerant piping is, the better the performance will be. Therefore, the connecting pipe should be as
short as possible.
Height difference H
Model
24K
36K
48K/60K
Refrigerant additional charge
The outdoor unit is pre-charged with refrigerant to accommodate a total piping length of 25ft (7.6m).
Additional refrigerant (R410A) is required for extending the piping beyond 25ft (7.6m).
24K/36K: Additional refrigerant charge= (L-25) ft×0.38 oz/ft
48K/60K: Additional refrigerant charge= (L-25) ft×0.60 oz/ft
2. Piping material
(1) Prepare locally-supplied copper pipes.
(2) Use clean copper pipes. Make sure that 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 material before connecting pipes.
(3) Piping thickness and material of the pipe are shown as below.
Thickness
Diameter
[in. (mm)]
[in. (mm)]
ø
1/4 (6.35)
1/32 (0.8)
ø
3/8 (9.52)
1/32 (0.8)
ø
1/32 (0.8)
1/2 (12.70)
ø
5/8 (15.88)
1/32 (1.0)
ø
3/4 (19.05)
1/32 (1.0)
ø
7/8 (22.22)
1/32 (1.0)
Gas
Liquid
(15.88)
3/8
(9.52)
(19.05)
3/8
(9.52)
(22.22)
3/8
(9.52)
Pipe length L
Indoor unit
Outdoor unit
Max. Height
Max. Pipe
difference
length (L)
(H)
164ft. (50m)
98ft. (30m)
246ft. (75m)
98ft. (30m)
246ft. (75m)
98ft. (30m)
Add.
Refrigerant
[exceed 25ft
7.6m]
0.38(oz/ft)
[35(g/m)]
0.38(oz/ft)
[35(g/m)]
0.60(oz/ft)
[56(g/m)]
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