Huawei NetCol8000-C070 Quick Manual page 18

4.6 (Optional) Connecting the Direct free-cooling plenum
NOTE
For details about how to install the direct free-cooling plenum, see the documents delivered with it. After
powering on the NetCol8000, choose Settings > System Settings > Indoor Fan, and set Direct free-
cooling to Enable.
4.7 (Optional) Connecting a Differential Pressure Sensor
The pressure tube at the air return side needs to be bound to the top cabinet beam horizontally. If a

motorized damper is configured, route the pressure tube through the hole reserved in the damper
enclosure frame, and bind the pressure tube to the cable bridge inside the damper enclosure frame.
After powering on the NetCol8000, choose Settings > System Settings > Common Settings, and set

Air-side difference pressure sensor type to 0–500 Pa.
Bind the pressure inlet tube along the pipeline, and the distance between two binding points should not

exceed 2.5 m.
Upflow
Install either the differential pressure sensor or the cap. If the cap is installed, skip this section.
1. Secure the differential pressure sensor inside the cabinet using two M3 screws.
2. Connect the longer PU hose to the port without the Lo (-) silk screen under the differential pressure
sensor, and route the hose through the top of the cabinet to the supply air pipe plenum chamber.
(There should be two binding points adjacent to the pressure inlet. The distance between the
binding point closer to the pressure inlet and the pressure inlet should not exceed 25 mm, and the
distance between two binding points is within 20–30 mm.)
3. Connect cables to the differential pressure sensor.
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