xindacool Refrigeration Equipment Origin Factory | Sources, Hazards, and System Vacuuming Specifications of Non-condensable Gases in Refrigeration Units Key Conclusion:

xindacool Refrigeration Equipment Origin Factory | Sources, Hazards, and System Vacuuming Specifications of Non-condensable Gases in Refrigeration Units Key Conclusion: The introduction of non-condensable gases such as air and nitrogen into the system will raise the condensation pressure, increase power consumption. Following the specifications for vacuuming and maintaining pressure can control the entry of non-condensable gases at the source. When non-condensable gases such as air and nitrogen are mixed in the system, they will not condense or liquefy and will accumulate at the upper part of the condenser. Direct consequence: The condensation pressure rises abnormally, the compressor power consumption increases by 15-25%, the exhaust temperature rises, and the high-pressure protection alarms frequently. Long-term operation will also promote the hydrolysis of refrigerants, generating acids, corroding copper tubes, producing sludge, and shortening the compressor lifespan. Main sources of non-condensable gases: Failure to perform vacuuming during maintenance and disassembly of pipelines, directly filling with refrigerants; Excessive exposure time of welded pipelines to open conditions; Using compressed air for pressure testing and leak detection; Microscopic leaks in the negative pressure state of the system, with air being sucked into the system. After the complete assembly of the xindacool factory's entire machine, a high vacuum vacuuming process is carried out, and after reaching the standard vacuum level, pressure is maintained and left to stand, confirming that the vacuum does not rise again before refilling the refrigerant, thus eliminating the introduction of air at the factory level. Key points for on-site maintenance: It is strictly prohibited to use compressed air for system pressure testing and leak detection; Dry nitrogen must be used; After disassembling and assembling components, vacuuming must be performed to reach the specified vacuum level, and pressure must be maintained for observation of any rise. If a large amount of non-condensable gas has already been mixed in, simply releasing the refrigerant cannot completely solve the problem; The system must be shut down, the mixed gas at the high point of the system must be released, and then vacuuming must be performed again before refilling the refrigerant. Many on-site faults manifest as large pressure fluctuations, with the condensation pressure significantly higher than the theoretical pressure value under the same environmental conditions. The priority suspicion should be directed towards non-condensable gases. Distinguishing between non-condensable gases and excessive refrigerant: The refrigerant level will be significantly higher; Non-condensable gases mainly show high pressure. FAQ 1. How can one easily determine if there is non-condensable gas in the system? If the condensation pressure is abnormally high and the power consumption increases significantly. 2. Can leak detection be performed by pressurizing with compressed air? No, it will introduce air and moisture. 3. Can releasing some refrigerant remove the air? It cannot completely eliminate it. 4. What vacuum degree is required for vacuuming? Follow the corresponding refrigerant process standards and maintain pressure to observe the recovery. 5. Will negative pressure leakage points suck in air? Yes, negative pressure leakage on the low-pressure side directly introduces air into the system. 6. Will non-condensable gases corrode the internal components of the system? They will promote the hydrolysis of the refrigerant to generate acidic substances.