Various general knowledge about fire protection flow switches has been covered in detail in the articles published last week. Next, let’s follow the engineers to the construction site and take a look at the on-site installation and commissioning of fire protection flow switches in practical operations.
The picture below shows the engineers guiding the installation of fire protection flow switches at a construction site in Shanghai, braving the scorching heat of 30 degrees Celsius. Since the pipelines had been installed previously, the fire department required rectification, so a grooved direct drilling installation method was adopted.
Schematic Diagram of Fire Protection Flow Switch Installation Location (close-up view on the left, long-distance view on the right)
Upon completion of the installation, the engineers proceeded with on-site commissioning.
Commissioning Methods
- Connect the brown and black wires to a 24V DC power supply.
- Turn on the faucet to release water, and observe whether the value displayed on the fire protection flow switch reaches 20%. When the value hits 20%, the red indicator light will turn on, and the output terminal will switch from normally open (NO) to normally closed (NC).
- After confirming that the test results are satisfactory and all outputs function properly, connect the blue and yellow wires of the output terminal to the reserved control lines of the main pump.
- Conduct a retest on the 18th and 19th floors on-site to verify the normal startup of the main pump.
- The entire commissioning process of the flow switch is completed once the main pump shows normal operation.
The above is a practical description of the on-site installation and commissioning of fire protection flow switches. If you have any questions during the actual installation, please feel free to contact our engineer, Mr. Tu, via phone for consultation.
