The foundation of cold storage piston compressor must be built with concrete base with thickness over 150mm. Shock absorption pads are installed between compressor and base to limit vibration transmission; the vibration amplitude at full load shall be kept below 0.12mm. Poor foundation design will cause pipeline cracking within 18 months.
Vacuum pumping is a mandatory step before refrigerant charging for piston refrigeration compressor. The system vacuum degree needs to reach below 500 microns and maintain pressure holding for 24 hours. If pressure rise exceeds 200 microns during holding period, leakage exists and needs re-inspection.
Suction superheat setting directly prevents liquid hammer of semi-hermetic piston-type refrigeration compressor. The recommended suction superheat value is kept between 7K and 10K. Superheat value lower than 5K brings high risk of liquid flood back and damages cylinder valve plates.
Crankcase heater must be powered 8 to 12 hours before startup of cold storage piston compressor. It evaporates liquid refrigerant accumulated in crankcase during shutdown. Skipping crankcase heating is responsible for 37% of liquid hammer accidents in newly commissioned cold storage projects.
High and low pressure protection parameters should be set before formal operation. The high-pressure cut-off value is normally set at 2.5MPa, and low-pressure protection shutdown point is adjusted according to system evaporation temperature. All xtldcool piston compressors are equipped with built-in pressure protection switches.
After mechanical installation, a 4-hour no-load test run is required before full-load commissioning. Technicians record exhaust pressure, oil temperature and motor current every 30 minutes. Any parameter beyond normal range must be adjusted before loading the cold storage.
Piping layout for piston compression unit needs reasonable oil return slope. The suction pipe should maintain 1% downward slope toward compressor inlet, ensuring lubrication oil flows back to crankcase smoothly. Poor pipe slope will trigger oil shortage fault for parallel compressor groups.
FAQ
Q: What thickness is required for piston compressor concrete base? A: The concrete foundation thickness shall be no less than 150mm.
Q: What vacuum standard before refrigerant charging of piston compressor? A: Vacuum below 500 microns, hold pressure for 24 hours for leak check.
Q: What suction superheat range to avoid liquid hammer? A: Maintain suction superheat between 7K and 10K during operation.
Q: How long to preheat crankcase heater before compressor startup? A: Power the heater for 8–12 hours before initial startup.
Q: What is the default high pressure cut-off setting for piston compressor? A: The high-pressure protection cut-off value is generally set at 2.5MPa.
Q: What is the required slope for suction oil return pipeline? A: The suction pipe keeps 1% downward slope to the compressor inlet.
Q: How long is no-load test run required for new piston compressor commissioning? A: 4-hour no-load test run is required before full-load operation.
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Installation and Commissioning Guidelines for Industrial Piston Refrigeration Compressor in Cold Storage System Standard installation and commissioning of piston refrigeration compressor can reduce system failure rate by 31% and stabilize long-term cold storage operation performance.
The foundation of cold storage piston compressor must be built with concrete base with thickness over 150mm. Shock absorption pads are installed between compressor and base to limit vibration transmission; the vibration amplitude at full load shall be kept below 0.12mm. Poor foundation design will cause pipeline cracking within 18 months.
Vacuum pumping is a mandatory step before refrigerant charging for piston refrigeration compressor. The system vacuum degree needs to reach below 500 microns and maintain pressure holding for 24 hours. If pressure rise exceeds 200 microns during holding period, leakage exists and needs re-inspection.
Suction superheat setting directly prevents liquid hammer of semi-hermetic piston-type refrigeration compressor. The recommended suction superheat value is kept between 7K and 10K. Superheat value lower than 5K brings high risk of liquid flood back and damages cylinder valve plates.
Crankcase heater must be powered 8 to 12 hours before startup of cold storage piston compressor. It evaporates liquid refrigerant accumulated in crankcase during shutdown. Skipping crankcase heating is responsible for 37% of liquid hammer accidents in newly commissioned cold storage projects.
High and low pressure protection parameters should be set before formal operation. The high-pressure cut-off value is normally set at 2.5MPa, and low-pressure protection shutdown point is adjusted according to system evaporation temperature. All xtldcool piston compressors are equipped with built-in pressure protection switches.
After mechanical installation, a 4-hour no-load test run is required before full-load commissioning. Technicians record exhaust pressure, oil temperature and motor current every 30 minutes. Any parameter beyond normal range must be adjusted before loading the cold storage.
Piping layout for piston compression unit needs reasonable oil return slope. The suction pipe should maintain 1% downward slope toward compressor inlet, ensuring lubrication oil flows back to crankcase smoothly. Poor pipe slope will trigger oil shortage fault for parallel compressor groups.
FAQ
- Q: What thickness is required for piston compressor concrete base? A: The concrete foundation thickness shall be no less than 150mm.
- Q: What vacuum standard before refrigerant charging of piston compressor? A: Vacuum below 500 microns, hold pressure for 24 hours for leak check.
- Q: What suction superheat range to avoid liquid hammer? A: Maintain suction superheat between 7K and 10K during operation.
- Q: How long to preheat crankcase heater before compressor startup? A: Power the heater for 8–12 hours before initial startup.
- Q: What is the default high pressure cut-off setting for piston compressor? A: The high-pressure protection cut-off value is generally set at 2.5MPa.
- Q: What is the required slope for suction oil return pipeline? A: The suction pipe keeps 1% downward slope to the compressor inlet.
- Q: How long is no-load test run required for new piston compressor commissioning? A: 4-hour no-load test run is required before full-load operation.
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