How to choose Commercial Freezer compressor?

Please verify the following points and require itemized written supplier responses:（Commercial Freezer compressor） Confirm volume, temperature zones and range, ambient humidity, product inlet temperature, loading quantity, door-opening frequency and power conditions. Confirm defrost method, drainage position, ventilation clearance, energy use, noise, grounding, anti-fog glass doors and temperature recording. Check the compressor, condenser, evaporator, expansion valve, controller, fan, insulation, door gasket, defrost, alarm and spare parts. Define capacity, accuracy, materials and operating environment before requesting quotes on a uniform basis. Request specification sheets, test reports, certificates, maintenance manuals and spare-part lists. During acceptance, verify appearance, dimensions, functions, safety protection and packaging, and keep test records. Do not compare unit price alone; include customization, freight, spare parts, after-sales support and downtime risk. Keep written records of inquiries, confirmations, FAT, acceptance and warranty commitments.