Installation
26 I
nstallation
6. Drainage pipe installation
I
nstall 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 1
0
48 1
2
60 1
4
According to the above table to calculate the total water flowrate for the confluence pipe selection.
F
or horizontal drainage pipe (The following table is for reference)
Allowable maximum water flowrate (l/h)
PVC pipe
R
eference value of inner
diameter of pipe (mm)
Slope 1/50 Slope 1/100
Remark
PVC25 2
0 39 27
PVC32 2
5 70 50
For branch pipe
PVC40 3
1 125 88
PVC50 4
0 247 175
PVC63 5
1 473 334
Could be used for confluence pipe
Attention: Adopt PVC40 or bigger pipe to be the main pipe.
F
or 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)
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