Machine Room Commissioning, Start-up Sequence, Acceptance Checklist & Operation Log
Machine room commissioning is the final verification of the whole refrigeration system after installation, before formal handover. Standard start-up sequence: visual inspection → leak test → vacuum → refrigerant charging → oil check → single component test → load running. Leak test: pressurize with dry nitrogen, hold pressure and detect leak; vacuum target below 500 microns for POE oil system. Charging: charge liquid refrigerant into receiver side; never charge liquid directly into compressor suction port. Commissioning key parameters: superheat, subcooling, condensing pressure, suction pressure, oil level, defrost termination temperature. Xiteliduo provides commissioning checklist, operation manual and alarm troubleshooting document together with equipment. Acceptance items: temperature stability, pull-down time, running current, noise, vibration, all alarm function test. Operation log record: daily room temperature, pressure, ambient temperature, running hour, alarm event and maintenance action. Training for end user: normal operation, alarm judgment, forbidden operation, safe pump down procedure and refrigerant handling. Handover standard: all test data recorded, drawings updated as-built, spare parts list submitted. Refrigeration maintenance & repair company recommends 72 hours continuous load running test before final acceptance.
FAQ
- What is the correct order before refrigerant charging? Pressure leak test and vacuum pumping.
- What is the vacuum target for POE oil system? Below 500 microns.
- Where to charge liquid refrigerant? Receiver side.
- What core parameters need recording during commissioning? Superheat, subcooling, suction and condensing pressure.
- How long is the suggested continuous load test? 72 hours.
- What log content should be recorded daily? Temperature, pressure, running hours and alarms.
- What must be tested before acceptance? All protection and alarm functions.
- What document should be handed over to customer? As-built drawing, manual, checklist and spare part list.
