Huawei NetCol8000-E220 User Manual page 117

NetCol8000-E220 Modular Indirect Evaporative Cooling
System
User Manual
Compone
nt
Pump
Y-type
filter
Figure 6-1 Drain valve
(1) Drain valve 1
Issue 02 (2019-10-10)
Item (Quarterly Maintenance)
without any abnormal noise.
Enter the diagnostic mode, start the
water pump and check whether the
water pump is leaking.
If the outdoor temperature is lower
than 3° C, close the water inlet valve
and manually open the drain valve (as
shown in Figure 6-1) to drain water.
When the water pump runs for the first
time every year, open the water inlet
valve. When the water pump works,
manually open the exhaust plug of the
water pump (Figure 6-2) to clean the
air.
Replace the filter periodically.
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6 System Operation and Maintenance
Troubleshooting
Seal the pipes again.
If the air is not completely
exhausted, air blockage may occur
and the water pump cannot spray
normally. In this case, you need to
manually exhaust the air. When the
water pump is running, loosen the
exhaust plug of the water pump.
When water flows out of the
exhaust hole, reinstall and tighten
the exhaust plug.
You are advised to replace the filter
once a year.
(2) Drain valve 2
109