Grounding Requirements; Water Refill And Drainage Requirements; Water Refill Requirements - Huawei FusionDC1000A Installation Manual

FusionDC1000A Prefabricated All-in-One Data
Center
Installation Guide (IT Scenario)

2.4 Grounding Requirements

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2.5 Water Refill and Drainage Requirements

2.5.1 Water Refill Requirements

The water refill ports for humidifiers must supply water continuously when the
FusionDC1000 is operating.
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Issue 01 (2021-04-20)
The external ground resistance of the pre-fab. module must not exceed 10
ohms, or the equivalent radius of the ground grid is no less than 5 m.
The pre-buried ground grid must be at least 0.7 m underground. In cold areas,
the ground electrodes must be buried under the frozen layer.
A pre-fab. module can be grounded using ground lugs or ground cables.
– Ground lug method: Use a ground lug made of hot-dip zinc-coated flat
steel sheet with a cross-sectional area of 40 mm x 4 mm, connect one
end of the ground lug to the pre-buried ground grid, and connect the
other end to the pre-fab. module ground point. When a ground grid is
pre-buried, the ground lug must be long enough to connect to a ground
point on the pre-fab. module.
– Ground cable method: Use a 95 mm
one end of the cable to the pre-buried ground grid, and connect the
other end to the pre-fab. module ground point. When a ground cable is
used, the ground cable must be routed through a plastic-coated metal
hose.
NO TE
● The screw reserved at a ground point is an M12 screw.
● A pre-fab. module can be grounded in the TN-S or TN-C-S mode.
Table 2-1 Requirements for water Refill ports and pipes
Port Port
Position Dimensio
ns
For the DN25 PP-
humidifier R pipe
in the port
smart
cooling
product
Copyright © Huawei Technologies Co., Ltd.
2
cable as the ground cable, connect
Water Transient
Pressure Water
Requirem Flow
ent
0.1–0.7 ≥ 1.2
MPa L/min
2 Site Requirements
Pipe Remarks
Pressure
Bearing
Capacity
1 MPa Consider
connectivit
y to water
refill
devices.
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