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Installing a Fire Extinguisher Cylinder
- Remove the rear cover from the cabinet.
- Observe the pressure gauge on the cylinder.
- If the pointer reading is 0 MPa, the cylinder is empty. Perform steps 3–12 to fill extinguishant onsite.
- If the pointer reading is greater than 1.1 MPa, the cylinder is filled with extinguishant. In this case, perform steps 10–12.
- Remove the fire-trace tube.
Do not bend or twist the fire-trace tube. Otherwise, the tube may be damaged and extinguishant may leak.
- Loosen the connection nut using an adjustable torque wrench.
- Remove the end of the fire-trace tube from the threaded nozzle.Figure 5-7 Removing the fire-trace tube
(1) Nut
(2) Fire-trace tube end
- Remove the fire extinguisher cylinder and dry contact cable.
- Remove the dry contact cable from the cylinder.
- Remove the cylinder fastener.
- Taking out the cylinderFigure 5-8 Removing the fire extinguisher cylinder
- Check the cylinder and all components for any damage, abrasion, or corrosion. If there is any visible abrasion or corrosion, replace the damaged components and all corroded components.
- Send the fire extinguisher cylinder to a station to fill extinguishant. Heptafluoropropane or perfluorohexanone is recommended. The required amount is 3 kg. The screw thread specification of the filler port is M10x1.
- In the process of assembling and filling, ensure that the valve, container, and other parts are clean and not contaminated.
- Do not remove the container valve and its components. For other operations, follow the filling specifications of the filling station.
- If you have any questions about filling extinguishant, contact technical support.
Table 5-2 Mapping between temperatures and pressuresTemperature (°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)
- Check the status of the fire extinguisher cylinder after filling extinguishant. If the cylinder is not installed in the cabinet immediately after extinguishant is filled, check the status of the cylinder again before installation.
- Check that the valve is closed (vertical to the cylinder).
- Check that the value of the pressure gauge on the cylinder is within the allowable pressure range specified in Table 5-2.
- Install the fire extinguisher cylinder and dry contact cable.
- Keep the cylinder upright.
- Ensure that the front of the pressure gauge faces the right side of the cabinet (as shown in the figure) and that the cylinder does not interfere with the battery trays and the rear cover of the cabinet.
Figure 5-9 Installing the fire extinguisher cylinder and dry contact cable - Install the fire-trace tube.
- Do not bend or twist the fire-trace tube or bind the tube using cable ties. Otherwise, the tube may be damaged, causing extinguishant leakage.
- Hold the pipe holding device close to the end to avoid bending the tube during pipe insertion.
- Clamp the end of the fire-trace tube to the threaded nozzle using a pipe holder or slip-proof gloves.
- Tighten the connection nut to 7 N·m using an adjustable torque wrench.Figure 5-10 Installing the fire-trace tube using a pipe holder
(1) Pipe holder
(2) Fire-trace tube end
(3) Nut
- Remove the valve positioning kit, slowly open the valve, reinstall the positioning kit, and secure it.
- Slowly open the valve. To avoid unexpected blowout, do not quickly open the valve.
- The end pressure gauge of the cabinet is used to determine whether the pressure of the fire extinguisher cylinder decreases during routine O&M inspection.
Figure 5-11 Opening the valve - Observe the end pressure gauge on the front of the cabinet and record the position of the pressure gauge pointer. 8 hours later, observe the pressure gauge again. The position should remain unchanged. If the pressure decreases, leakage occurs. In this case, contact technical support.
- Reinstall the rear cover for the SmartLi.
