Installing Drainpipes - Huawei NetCol5000-A050 User Manual

NetCol5000-A050 In-row Air Cooled Smart Cooling
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Figure 4-69 Connecting water pipes
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4.8.7 Installing Drainpipes

Context
When installing drainpipes, ensure that the following requirements are met:
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The following uses a rigid drainpipe as an example to describe how to install a
drainpipe.
Bottom Pipe Routing
Step 1 Remove the drainpipe plug, as shown by (1) in
Issue 13 (2023-08-20)
The external drainpipe must have a downward gradient (> 1:100) along the
drainage direction, and no accumulated water is allowed.
The maximum lift of the drainage pump is 4 m, with the drainage height and
drainpipe system resistance considered. If the total system lift is greater than
4 m, the water pump flow will be less than the rated flow. In this case,
shorten the drainpipe length, reduce the number of bends (to reduce local
resistance), or decrease the drainage height to ensure that the total system
lift is less than or equal to 4 m.
Total lift of the water pump = Drainage height (Vertical height difference
between the water pump and the highest point of the drainpipe) + Drainpipe
system resistance (Length of the straight drainpipe section x Equivalent lift of
the straight drainpipe section + Number of bends x Equivalent lift of bends)
Select a DN20 (3/4 inch) drainpipe. The equivalent lift of each meter of the
straight drainpipe section is 0.0323 m, and the equivalent lift of each bend is
0.0317 m.
Assume that the drainage height is 3.9 m, the straight drainpipe section is 5
m, and two bends are used. The total lift of the water pump is 4.1249 m.
Calculation formula: 3.9 m + 5 x 0.0323 m + 2 x 0.0317 m = 4.1249 m In this
case, the total lift is greater than 4 m, and the water pump flow is less than
the rated flow. It is necessary to shorten the drainpipe length, reduce the
number of bends (to reduce local resistance), or decrease the drainage height.
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Figure 4-70.
4 Installation
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