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5) Piping length and the elevation
Model Name
AT-C186PLE0
(12.70mm)
AT-C186PLE1
(15.88mm)
AT-C246PLE0
(15.88mm)
AT-C308PLE0
(15.88mm)
5/8"
AT-C368NLE0
(15.88mm)
AT-C488MLE0 (15.88mm)
AT-C548MLE0
(19.05mm)
Extra refrigerant = (Extended length - Rated length) x Additional refrigerant.
Indoor unit
A
B
CAUTION:
• Rated performance for refrigerant line length of:7.5m
• Capacity is based on standard length and maximum allowance length is on the
basis of reliability.
• Improper refrigerant charge may result in abnormal cycle.
• Oil trap should be installed every 10 meters.
Pipe Size
(Diameter:Ø)
Gas
Liquid
Standard
1/2"
1/4"
(6.35mm)
5/8"
3/8"
(9.52mm)
5/8"
3/8"
(9.52mm)
3/8"
5/8"
(9.52mm)
3/8"
(9.52mm)
5/8"
3/8"
(9.52mm)
3/4"
3/8"
(9.52mm)
Outdoor unit
Indoor unit
Length
(m)
Max.
Standard
7.5
30
7.5
30
7.5
30
7.5
50
7.5
50
7.5
50
7.5
50
Outdoor unit
A
B
Elevation
(m)
Max.
20
5
5
20
5
20
5
30
5
30
30
5
30
5
Oil trap
4
Indoor unit
If piping length is more than 5m
Installation Manual 9
Installation
*Additional
refrigerant(g/m)
20
20
20
25
25
25
25
Outdoor unit
A
B
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