Mars Comfort-Aire Century VCD-SA Series Service Manual page 75

Service Manual - VCDxxSA
5. 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.
5.1 Installation principle
•
Ensure at least 1/100 slope of the drainage pipe
•
Adopt suitable pipe diameter
•
Adopt nearby condensate water discharge
5.2 Key points of drainage water pipe
installation
1. Considering the pipeline route and elevation.
•
Before installing condensate water pipeline, deter-
mine 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 flow-
rate is decided by the capacity of indoor unit.
Relationship between water flowrate and capacity of
indoor unit
Capacity (kBtu/h)
24
30
36
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)
Reference
PVC value of inner
pipe diameter of
pipe (mm)
PVC25 20
25
PVC32
PVC40 31
40
PVC50
PVC63 51
Attention: Adopt PVC40 or bigger pipe to be the main
pipe.
Water flowrate (l/h)
6
7
8
12
14
Allowable
maximum water
Remark
flowrate (l/h)
Slope Slope
1/50 1/100
39 27
For branch
pipe
70 50
Could be
125 88
used for
247 175
confluence
473 334
pipe
 5. Drainage Pipe Installation
For Vertical drainage pipe (The following table is for
reference)
Reference
PVC value of inner
pipe diameter of
pipe (mm)
20
PVC25
25
PVC32
31
PVC40
40
PVC50
51
PVC63
67
PVC75
77
PVC90
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 in-
stalled 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 and 1.5m~2.0m.
•
Each vertical pipe shall be equipped with not less
than two hangers.
•
Overlarge hanger gap for horizontal pipe shall cre-
ate bending, thus leading to air block.
5. The horizontal pipe layout should avoid converse flow or
bad flow

Allowable
maximum water Remark
flowrate (l/h)
220
For branch
pipe
410
730
Could be
1440
used for
2760
confluence
5710
pipe
8280