Installation
26
Installation
6. Drainage pipe installation
Install the drainage pipe as shown below and take measures against condensation. Improperly installation
could lead to leakage and eventually wet furniture and belongings.
6.1 Installation principle
Ensure at least 1/100 slope of the drainage pipe
Adopt suitable pipe diameter
Adopt nearby condensate water discharge
6.2 Key points of drainage water pipe installation
6.2.1 Considering the pipeline route and elevation
Before installing condensate water pipeline, determine its route and elevation to avoid intersection with
other pipelines and ensure slope is straight.
6.2.2 Drainage pipe selection
The drainage pipe diameter shall not small than the drain hose of indoor unit
According to the water flowrate and drainage pipe slope to choose the suitable pipe, the water flowrate
is decided by the capacity of indoor unit.
Relationship between water flowrate and capacity of indoor unit
Capacity (x1000Btu)
Water flowrate (l/h)
12
2.4
18
4
24
6
30
7
36
8
42
10
48
12
60
14
According to the above table to calculate the total water flowrate for the confluence pipe selection.
For horizontal drainage pipe (The following table is for reference)
Allowable maximum water flowrate (l/h)
PVC pipe
Reference value of inner
diameter of pipe (mm)
Slope 1/50
Slope 1/100
Remark
PVC25
20
39
27
PVC32
25
70
50
For branch pipe
PVC40
31
125
88
PVC50
40
247
175
PVC63
51
473
334
Could be used for confluence pipe
Attention: Adopt PVC40 or bigger pipe to be the main pipe.
For Vertical drainage pipe (The following table is for reference)
PVC pipe
Reference value of inner
diameter of pipe (mm)
Allowable maximum water flowrate (l/h)
Remark
PVC25
20
220
PVC32
25
410
For branch pipe
PVC40
31
730
PVC50
40
1440
PVC63
51
2760
PVC75
67
5710
PVC90
77
8280
Could be used for confluence pipe
Attention: Adopt PVC40 or bigger pipe to be the main pipe.
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