Pioneer CB009GMFILCFHD Service Manual page 70

 Adopt suitable pipe diameter
 Adopt nearby condensate water discharge
12.5.2 Key points of drainage water pipe
installation
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.
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)
12
18
24
30
36
42
48
60
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
Reference
maximum
value of
water flowrate
PVC
inner
(l/h)
pipe
diameter of
Slope
pipe (mm)
1/50
PVC25 20 39
PVC32 25 70
PVC40 31 125
PVC50 40 247
PVC63 51 473
Attention: Adopt PVC40 or bigger pipe to be the
main pipe.
Water flowrate (l/h)
2.4
4
6
7
8
10
12
14
Remark
Slope
1/100
27
For branch
pipe
50
88
Could be used
175 for confluence
pipe
334
For Vertical drainage pipe (The following
table is for reference)
Reference
value
PVC
inner
pipe
diameter of
pipe (mm)
PVC25 20
PVC32 25
PVC40 31
PVC50 40
PVC63 51
PVC75 67
PVC90 77
Attention: Adopt PVC40 or bigger pipe to be the
main pipe.
3. Individual design of drainage pipe
system
 The drainage pipe of air conditioner shall
be installed separately with other sewage
pipe, rainwater pipe and drainage pipe in
building.
 The drainage pipe of the indoor unit with
water pump should be apart from the one
without water pump.
4. Supporter gap of drainage pipe
 In general, the supporter gap of the
drainage pipe horizontal pipe and vertical
pipe is respectively 1m~1.5m (3.28~4.92ft)
and 1.5m~2.0m(4.95~6.56ft).
 Each vertical pipe shall be equipped with
not less than two hangers.
 Overlarge hanger gap for horizontal pipe
shall create bending, thus leading to air
block.
5. The horizontal pipe layout should avoid
converse flow or bad flow
67
Allowable
of
maximum
Remark
water
flowrate (l/h)
220
For
pipe
410
730
1440
Could be used
2760 for confluence
pipe
5710
8280
Too long distance
Gas bag
branch