Huawei FusionCol8000-C210 Quick Manual page 3

3.1 Removing Air Filters
3.2
Checking the Nitrogen Pressure and Exhausting Nitrogen
• The equipment is charged with nitrogen
before delivery. Rotate the exhaust valve
counterclockwise. If there is a hiss sound,
the system is well sealed, and you need to
open the exhaust valve to exhaust the
nitrogen. If there is no hiss sound, contact
Huawei technical support.
• You can open or close the exhaust valve
using a flat-head screwdriver.
Slowly open the exhaust valve to release
nitrogen. After the nitrogen is exhausted, close
the exhaust valve.
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