1. Standard length of connection pipe
    ● 5m, 7.5m, 8m.
4. The additional refrigerant oil and refrigerant charging required after prolonging  
    connection pipe
    ● After the length of connection pipe is prolonged for 10m at the basis of 
       standard length, you should add 5ml of refrigerant oil for each additional 5m 
       of connection pipe.
 ● The calculation method of additional refrigerant charging amount (on the basis 
       of liquid pipe):
    ● Basing on the length of standard pipe, add refrigerant according to the
       requirement as shown in the table. The additional refrigerant charging amount
       per meter is different according to the diameter of liquid pipe. See the
       following sheet.
 
         Additional refrigerant charging amount = prolonged length of liquid pipe × 
         additional refrigerant charging amount per meter
Cooling 
capacity
Cooling 
capacity
5000Btu/h
(1465W)
24000Btu/h
(7032W)
7000Btu/h
(2051W)
28000Btu/h
(8204W)
9000Btu/h
(2637W)
36000Btu/h
(10548W)
12000Btu/h
(3516W)
42000Btu/h
(12306W)
18000Btu/h
(5274W)
48000Btu/h
(14064W)
Max height 
difference
Max height 
difference
Max length 
of connec-
tion pipe
Max length 
of connec-
tion pipe
15 255 10
15 305 10
15 305 20
20 3010 20
25 3010 20
2. Min. length of connection pipe is 3m.
3. Max. length of connection pipe and max. high difference.
Conguration of connection pipe