Huawei NetCol8000-E220 Series Quick Manual page 17

Remove the screws from the air filter, and remove the air filter. Remove the air filter cover and
refasten the air filter. Close all the maintenance doors and install the air filter on the air intake vent
on the outdoor side.
Removing Elastic Cords on The Floats
7.4
Checking Nitrogen
7.5
Low-pressure
needle valve 1
Low-pressure
needle valve 2
17
Liquid pipe
needle valve 1
Liquid pipe
needle valve 2