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Direct cooling block ice machine winter shutdown maintenance guide
To ensure the safe shutdown of direct-cooling block ice machines in low-temperature winter environments and their stable, efficient operation upon restart the following year, standardized winter maintenance can effectively prevent pipeline freezing and cracking, system clogging, and equipment corrosion, which are key factors in extending the service life of the equipment.
1. Core System Shutdown and Medium Drainage The key to winter maintenance lies in thorough drainage and protection of the refrigeration system, water circuit system, and electrical system. 2. Refrigeration System: Standardized Refrigerant Recovery Before complete power-off, recover all refrigerant from the system into the outdoor condenser or liquid receiver. This operation aims to protect the compressor and prevent potential leaks caused by abnormal pressure under low temperatures. 3. Water Circuit System: Complete Drainage to Prevent Freezing Incomplete drainage is the primary cause of winter equipment damage, so absolute thoroughness is essential. Execution Steps: - Close the main water supply valve. - Sequentially drain the evaporator, condenser, cooling tower, water storage tank, and supply pump. - Pay special attention to the pump cavity of the water pump to ensure it is fully drained.
2. Maintenance of Electrical Control System 1. Standardized Power-off and Restart Procedures Shutdown Procedure: After completing the above steps, disconnect the main power supply of the equipment. Restart Preheating: Before reactivating the equipment the following year, it is necessary to power it on 8-12 hours in advance for preheating to eliminate moisture inside electrical components and preheat the compressor lubricating oil. 2. Electrical Panel Restart Internal Cleaning: Open the main electrical panel and use dry nitrogen (compressed air containing water or oil is strictly prohibited) to thoroughly blow away dust from components such as circuit boards, contactors, and circuit breakers. Ensure the system is completely powered off during cleaning. Wiring Inspection: Conduct a comprehensive inspection of the main circuit and control wiring harnesses, checking for looseness, aging, exposed wires, or signs of overheating. Tighten or replace them promptly if necessary.
3. Evaporative cooler/cooling tower Before shutdown: Ensure complete drainage of water from the sump, spray piping, and fill media. Before startup: Thoroughly inspect water pipelines and nozzles, and only refill after confirming no blockages exist.
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Telephone:0757-23335676
Fax: 0757-23335676
E-mail:771348712@qq.com
Address: Beiyuan Middle Road, Shishan Science and Technology Industrial Park, Shishan Town, Nanhai District, Foshan City, Guangdong Province (opposite Dongpu Company)
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