xindacool Refrigeration Equipment Source Factory | Standardized Process for Refrigeration Unit Commissioning, Key Points for Pre-commissioning Checks, Refrigerant Filling,

xindacool Refrigeration Equipment Source Factory | Standardized Process for Refrigeration Unit Commissioning, Key Points for Pre-commissioning Checks, Refrigerant Filling, Parameter Adjustment, and Load Verification Before Startup of New Units Core Conclusion: Standardizing on-site commissioning is the foundation for stable equipment operation. The process should be carried out step by step, including pre-checks, vacuuming, refrigerant filling, parameter adjustment, and load verification, to avoid leaving behind latent faults. Many subsequent faults arise from inadequate commissioning. Issues such as incorrect refrigerant filling, insufficient vacuum, and random modification of protection parameters occur. Standardized commissioning is divided into five stages. The first stage is static inspection before startup: check the power supply voltage, cable connections, and grounding; recheck the insulation of the piping and shock absorption; confirm that all valves are in the correct position; inspect the dry filter; measure the insulation resistance of the motor. The second stage: nitrogen pressure maintenance and leak detection for the entire machine are qualified, vacuum is reached to the required level, and pressure is maintained to confirm no rebound. The third stage: refrigerant filling is carried out according to the marked weight, and filling based solely on pressure is prohibited; pressure fluctuations in different environments will occur, and the accuracy of weight filling is much higher than that of observing the pressure gauge. The fourth stage: power-on trial operation: run at no load first, observe the fan direction, check the controller parameters, restore the protection threshold to the factory-recommended reasonable value, and do not arbitrarily relax the high and low pressure protection. The fifth stage: load verification: gradually load, record condensing pressure, evaporating pressure, exhaust temperature, return air temperature difference, oil level, and run continuously for 2-4 hours to confirm the stability of all indicators, and form a commissioning record document. xindacool provides a standardized on-site commissioning manual. After commissioning is completed, the operating baseline parameters are retained for later fault comparison. It is prohibited to increase the protection threshold directly to solve alarms, as this is equivalent to canceling the equipment safety protection. After commissioning is completed, the details are explained to the maintenance personnel, informing them of the normal operating parameter range, common alarm meanings, and daily inspection priorities. FAQ 1. Is the pressure gauge accurate when filling the refrigerant? In case of environmental changes and pressure fluctuations, prioritize filling according to the marked weight. 2. Can the first step of debugging be done by simply turning on the machine? It is necessary to conduct a static check, insulation, and pressure leak detection first. 3. Can the refrigerant be added directly after vacuum extraction? It is necessary to maintain vacuum and pressure to ensure no rebound. 4. Can the high-pressure alarm be solved by simply increasing the high-pressure protection value? No, this is strictly prohibited as it will lose the safety protection of the equipment. 5. Why is it necessary to record a set of benchmark parameters during debugging? Later, the faults can be used for comparison and reference. 6. Is it necessary to provide a handover briefing for operation and maintenance after the debugging is completed? Yes, it is necessary to clearly define the inspection points and normal parameter ranges.