CHS_LHS

30366461EN-08 12 LU-VE Group reserves the right to change specifications without prior notification. 4 Maintenance 4.1 General It is essential after delivery that adequate protection and inspection are carried out on the equipment. This is especially important if there is any delay in installing or commissioning the equipment. After commissioning and setting up the defrost systems, the heat exchanger will require maintenance. Regular checks and good maintenance will ensure trouble free operation. The frequency of checks will depend on site location and the specific operating conditions. Equipment installed in industrial or coastal areas, or in any kind of aggressive environment, generally requires more frequent inspections than the same equipment in rural, unpolluted areas. Damage can occur during site installation and during the period prior to commissioning. Inspections and remedial work should take place during this period. On sites where building work is in progress, it is strongly advised that finned block, headers and return bends are covered up to keep them clean and protected from damage until the time of commissioning. Î Header and cooler tubes can be extremely cold! Take precautions when maintenance is carried out near the header and cooler tubes. Replace loose connections and defective cables immediately. Always check the protective ground. After any service or routine maintenance is performed be sure to properly reinstall all access / cover panels, fan guards, drain pans, electrical covers and their fasteners. Never operate equipment with any of these components missing or damaged. 4.2 Cleaning and disinfecting A coil block should be kept clean to guarantee it works well. The user of the heat exchanger should ensure that the cleaning and disinfecting agents that are used do not have a corrosive effect on the materials used by LU-VE Group. 4.3 Casing Casework checks should be carried out at least every 3 months. In doing so, inspect for any deterioration of coating and/or corrosion. If such flaws are noted, take immediately remedial action. Should any damage occur during installation, this should be repaired immediately to prevent further deterioration. 4.4 Coil and drain tray The heat exchanger coil should be checked at least every 3 months, with close inspection being carried out for such things as leaks or chafing of tubes. In addition, any unusual vibration of the fans should be checked. The unit should be cleaned as instructed when necessary using low pressure compressed air, and/or low pressure water hose or a mild detergent wash. Care must be taken not to hose directly onto fan motors or electric control panels or the electrical connection boxes of the heaters. It should be noted that abnormal atmospheric conditions can greatly harm the lifetime of the finned coil. Please ensure the drain tray is empty before it is disassembled. The weight of any leftover water could injure the operator if the drain tray fell open accidentally. 4.5 Fans Fans should be checked 3 months after commissioning and thereafter depending on operating conditions and as experience dictates, for any dirt build-up and/or unusual vibration, which could ultimately cause damage to the fan or to the heat exchanger itself. Ensure complete electrical isolation before removing fan guards. Fan blades should also be checked for any erosion or corrosion and remedial action taken as necessary. All dirt and other contamination should be removed to avoid imbalanced running of the fan and motor bearing overheating. The security of the fan fastenings and the integrity of the components should be checked integrally as part of the routine maintenance operation. Particular attention should be paid to the fastening screws and balance of the fan blades. In the event of a broken mounting screw during operation, do not simply replace it. These issues are typically caused by a high level of vibrations and may persist even with new screws. If such problem occurs, the source of the vibration shall be identified (fan motor, ice, application, etc.). If the fan motor is identified as the source of vibration, the entire fan unit needs to be replaced. Otherwise, the other source of vibrations shall be eliminated.