Regarding operational issues of cabinet-type Heptafluoropropane fire suppression systems

　　Cabinet-type heptafluoropropane is one of the mainstream application forms among current heptafluoropropane fire suppression systems on the market. Thanks to its lightweight and portability, while still maintaining the exceptionally high fire-extinguishing efficiency characteristic of heptafluoropropane, it has earned widespread acclaim in the industry. Today, we’ll start with cabinet-type heptafluoropropane to delve deeper into how this system operates.

　　The operation of cabinet-type heptafluoropropane systems is crucial, and we must inspect each component of the equipment. Here are some common issues encountered during the operation of heptafluoropropane fire suppression systems:

　　1. How can the polarity of the wiring for the pressure sensor of a solenoid valve be distinguished?

　　The two leads of the solenoid valve and pressure switch in the cabinet-type heptafluoropropane system are non-polar.

　　2. Is there no pressure indication on the pressure gauge of storage equipment or electromagnetic-driven devices?

　　Check whether the switch for the storage equipment pressure gauge is already open; if the pressure gauge switch is already on, remove the current gauge and replace it with an identical model, then reopen the pressure gauge switch. If the pressure gauge returns to the green zone, it indicates that the pressure is normal. However, if the gauge remains outside the designated range, you can try swapping in a new pressure gauge for testing. If, after installing the new gauge and opening its switch, no pressure is still displayed, it’s possible that the pressurized gas has leaked—so in this case, you should promptly replenish the pressure. In either scenario, once you’ve finished checking the pressure gauge, be sure to tighten the sealing nut at the gauge interface clockwise.

　　3. When putting it into use, should the installed safety stopper be removed and the locking pin pulled out?

　　The solenoid valve is equipped with a safety shunt, primarily designed to prevent accidental operation of the gate blade during transportation, handling, or debugging due to impacts, vibrations, or other disturbances. Before putting the system into operation, loosen the bolt on the electromagnet, remove the shunt, and then securely reattach the electromagnet—otherwise, the solenoid valve will remain closed. Additionally, the safety retaining clip ensures that the manual lever can only be pressed down after the clip has been fully pulled out; this mechanism is essential exclusively for manually activating the container valve. Importantly, operating the manual lever does not interfere with the solenoid valve’s electrical activation process.

　　4. When putting the system into operation, should the safety pin on the storage equipment container valve be pulled out?

　　The safety pin on the container valve is used to lock the cam lever in place. It must be pulled out first before the cam lever can be lowered, but only when manually operating the container valve mechanically. Importantly, locking the cam lever does not affect the nitrogen activation of the container valve.