Installation
Page 46
• The correct installation will not cause converse
water flow and the slope of the branch pipes can be
adjusted freely
• The false installation will cause converse water flow
and the slope of the branch pipe can not be ad-
justed.
6. Water storage pipe setting
• If the indoor unit has high extra static pressure and
without water pump to elevate the condensate wa-
ter, such as high extra static pressure duct unit , the
water storage pipe should be set to avoid converse
flow or blow water phenomena.
7. Lifting pipe setting of indoor unit with water pump
• The length of lifting pipe should not exceed
750mm/29.5in.
• The drainage pipe should be set down inclined after
the lifting pipe immediately to avoid wrong opera-
tion of water level switch.
• Refer the following picture for installation reference.
8. Blowhole setting
• For the concentrated drainage pipe system, there
should design a blowhole at the highest point of
main pipe to ensure the condensate water discharge
smoothly.
• The air outlet shall face down to prevent dirt enter-
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
For branch
pipe
PVC32
25 410
PVC40
31 730
Could be
used for
confluence
pipe
PVC50
40 1440
PVC63
51 2760
PVC75
67 5710
PVC90
77 8280
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
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