Entretien du refroidisseur-à air

Air-cooled chillers require daily, regular, seasonal, and professional maintenance to ensure efficient operation and extend their service life (average service life is 8 to 12 years). Routine maintenance focuses on checking the integrity of the external casing (casing screw torque of 5 to 6 Nm) and the cleanliness of the radiator fins (fin pitch of 2 to 3 mm). Operating parameters must also be monitored: the temperature difference between the inlet and outlet of the chilled water must be maintained at 5 to 6°C, the suction pressure must be within 0.35 to 0.45 MPa, and the current fluctuation must not exceed ±10% of the nominal value. Routine maintenance includes cleaning the air filter (every one to two months, and replacing it when the pressure difference exceeds 50 Pa) and deep cleaning the condenser (recommended every six months, using a dedicated cleaner with a pH of 7 to 9). The motor insulation resistance must be tested to be >2 MΩ, et l'intervalle de vidange d'huile lubrifiante est généralement de 2 000 heures de fonctionnement. Lors de l'entretien saisonnier, le système doit être complètement vidé de toute eau résiduelle (pour éviter les fissures dues au gel aux pressions<0.2 MPa). A refrigerant leak test must be performed before operation (annual leakage rate <5%). Professional maintenance recommends an inspection of the compressor valve assembly (seal clearance <0.03 mm) and calibration of the control system (temperature sensor error ±0.5°C) every two years.