Delta 21CK018C24 Instruction Manual page 43

Note！
● Please do tighten the nuts and bolts to prevent air conditioner break off.
F、Connect the refrigerant pipe
☆ Selection of Connecting Pipe
Item
Model
21CK018C24
31VP018
21CK024C24
31VP024
21CK036C24
31VP036
21CK042C24
31VP048
21CK048C24
31VP060
Note: 1、The standard pipe length is 5m,When the length(L) of the connecting pipe is less than or
equals 5m,there is no need to add refrigerant. If the connecting pipe is longer than 5m,it is
required to add refrigerant, in the above table,the amounts of refrigerant to be added for the
models are listed for each additional meter of pipe length.
2、The pipe wall thickness shall be 0.5-1.0mm and the pipe wall shall be able to withstand the
pressure of 6.0MPa.
3、The longer the connecting pipe,the lower the cooling effect and the heating effect.
Drainage hose
G、
1. Install the drain hose
☆ The diameter of the drain hose should be equal or bigger than the connection pipe's. ( The
diameter of polythene pipe: Outer diameter 25mm Surface thickness ≥1.5mm)
☆ Drain hose should be short and drooping gradient should at less 1/100 to prevent the formation of
air bubble.
Size of Fitting Pipe
(inch)
Length
Gas Liquid
Pipe Pipe
5/8 3/8
5/8 3/8
1/2 3/4
42
Max. Max. Height
Pipe Difference between
Indoor Unit and
(m) Outdoor Unit（m）
20 15
30 15
50
Amount of Additional
Refrigerant to be Filled
(For Extra Length of
Pipe)
60g/m
60g/m
30 120g/m