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Installation of Indoor, Outdoor Unit
3. Piping length and the elevation
Capacity
Gas
UU12
3/8"(9.52mm) 1/4"(6.35mm)
UU18
1/2"(12.7mm) 1/4"(6.35mm)
UU24
5/8"(15.88mm) 3/8"(9.52mm)
UU30
5/8"(15.88mm) 3/8"(9.52mm)
UU37
5/8"(15.88mm) 3/8"(9.52mm)
Oil trap
Gas piping
Liquid piping
Outdoor unit
CAUTION:
• Rated performance for refrigerant line length of:7.5m(UU12, UU18 : 5m)
• Capacity is based on standard length and maximum allowance length is on the
basis of reliability.
• Improper refrigerant charge may result in abnormal cycle.
8 Air Conditioner
Pipe Size
(Diameter:Ø)
Liquid
Indoor unit
* Install trap at each
difference in height
15m
Length A(m)
Standard
Max.
5
15
5
50
7.5
40
7.5
50
7.5
50
Outdoor unit
Elevation B(m)
Standard
Max.
2
10
2
30
2
30
2
30
2
30
A trap is not necessary when the
outdoor unit is installed in a higher
position than the indoor unit.
Indoor unit
*Additional
refrigerant(g/m)
20
35
45
45
45
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