listed in the following table, add nitrogen until the pressure reaches the
required value.
Table 8-2 Mapping between temperatures and pressures
Temperature (°C) Recommended
Pressure
Allowed Pressure
Range
0 12 bar (1.2 MPa) 11–13 bar (1.1–1.3
MPa)
10 14 bar (1.4 MPa) 13–15 bar (1.3–1.5
MPa)
20 17 bar (1.7 MPa) 16–18 bar (1.6–1.8
MPa)
25 18.5 bar (1.85 MPa) 17.5–19.5 bar (1.75–
1.95 MPa)
30 20 bar (2.0 MPa) 19–21 bar (1.9–2.1
MPa)
40 23 bar (2.3 MPa) 22–24 bar (2.2–2.4
MPa)
5. After the
lling is complete, check for leakage according to the procedure of
the
lling station.
Step 5 Check the status of the
re cylinder after lling extinguishant. If the re cylinder is
not reinstalled immediately after extinguishant is
lled, check the status of the re
cylinder again before installation.
● Check that the valve is closed (vertical to the cylinder).
● Check that the reading of the pressure gauge on the
re cylinder is greater
than 1.6 MPa at 20°C and the pointer is in the green zone.
Step 6 Reinstall the
re cylinder.
● Keep the re cylinder upright.
● Ensure that the front of the pressure gauge faces the right side of the cabinet
and that the cylinder does not interfere with the battery trays and the rear
cover of the cabinet.
Step 7 Install the re-trace tube.
Do not bend or twist the re-trace tube. Otherwise, extinguishant may leak.
FusionDC1000A Prefabricated All-in-One Data
Center
Installation Guide (IT Scenario) 8 Installing Devices Inside the Pre-fab. Module
Issue 01 (2021-04-20) Copyright © Huawei Technologies Co., Ltd. 94
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