Daily operation and maintenance of plate heat exchanger units

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Plate heat exchanger units have been widely used in central heating and domestic hot water systems, automatically and continuously converting the heat obtained from the primary network into the domestic water and heating water required by users. It boasts advantages such as high heat exchange efficiency, compact structure, attractive appearance, and simple and reliable operation. To ensure that the heat exchange unit can fully utilize its heat exchange capabilities during operation, run smoothly, and extend the service life of the equipment. During the operation of plate heat exchanger units, regular routine maintenance and inspections are necessary: 1. The entire heat exchange system must first be filled with treated softened water. 2. The heat source and outdoor heat network connected to the heat exchange unit – only after the heating system has passed the construction and installation inspections, with no leaks in the entire system, can the unit be started up and operated. 3. Before starting the heat exchange unit, all valves are in a closed state. First, open all the return water valves; after starting the circulation pump, gradually open the outlet valve and the supply water valve. At this time, attention should be paid to whether the starting current exceeds the rated value. Gradually open the heat source inlet valve and outlet valve once the system reaches stability. 4. After the system is operating stably, record the values of temperature, pressure, and flow rate at regular intervals. 5. When shutting down the system, first close the heat source inlet valve; wait five minutes before stopping the circulation pump and closing the water supply valve. 6. During normal operation of the unit, regular maintenance and cleaning should be carried out to check whether the water pump is operating properly. 7. Lubricate the rotating parts of all connection valves in the unit regularly or irregularly. 8. Regularly wipe away dirt from the surfaces of instruments, valves, and equipment, and repaint any areas where the paint has worn off. 9. Regularly remove any debris that may be present in the Y-type filters at the various inlets of the equipment. 10. Remove any rust, sludge, and dirt that may have accumulated inside the strainer at the device’s water inlet. 11. Regularly inspect or replace various valves connected to the unit. 12. Regularly inspect the unit’s instruments to ensure that their readings are accurate and their operation is reliable. 13. During winter shutdown, close the valves at all connections and drain all water.