Midea MHF-18HWN1-Q, Руководство по обслуживанию

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Insulation Work
Installation 97
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)
PVC pipe
Reference value of inner
diameter of pipe (mm)
Allowable maximum water flowrate (l/h)
Remark
Slope 1/50 Slope 1/100
PVC25 20 39 27
For branch pipe
PVC32 25 70 50
PVC40 31 125 88
Could be used for confluence pipe PVC50 40 247 175
PVC63 51 473 334
Attention: Adopt PVC40 or bigger pipe to be the main pipe.
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.
6.2.3 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.
6.2.4 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 create bending, thus leading to air block.
Too long distance
Gas bag
6.2.5 The horizontal pipe layout should avoid converse flow or bad flow
Drainage pipe
Water flow
Drainage pipe
Drainage pipe
Drain tee
Drain tee
Water flow
Water flow
Water flow
Water flow
Water flow
Water flow
Water flow
Water flow
Drain tee