Drainage Pipe Installation - Fisher FSKIF-121AE2-EU Service Manual

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)
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)
Reference value of inner
PVC pipe
diameter of pipe (mm)
PVC25
PVC32
PVC40
PVC50
PVC63
Attention: Adopt PVC40 or bigger pipe to be the main pipe.
For Vertical drainage pipe (The following table is for reference)
Reference value of inner
PVC pipe
diameter of pipe (mm)
PVC25
PVC32
PVC40
PVC50
PVC63
PVC75
PVC90
Attention: Adopt PVC40 or bigger pipe to be the main pipe.
Installation
12
18
24
30
36
48
60
Allowable maximum water flowrate (l/h)
Slope 1/50
20 39
25 70
31 125
40 247
51 473
Allowable maximum water flowrate (l/h)
20
25
31
40
51
67
77
Water flowrate (l/h)
Slope 1/100
27
50
88
175
334
220
410
730
1440
2760
5710
8280
Drainage pipe installation
2.4
4
6
7
8
12
14
Remark
For branch pipe
Could be used for confluence pipe
Remark
For branch pipe
Could be used for confluence pipe
107