Installation of forward-curved multi-blade fans must meet the following requirements:

Installation of forward-curved multi-blade fans must meet the following requirements:Regarding the installation of forward-curved multi-blade fan equipment, attention must be paid not only to standard specifications but also to specific details. For instance, contact surfaces of the forward-curved multi-blade fan equipment should be coated with grease or oil to prevent rust and reduce disassembly difficulty. Additionally, during bolted joint assembly, if locating pins are present, install the pins first before tightening the bolts. Beyond the above, ensure thorough inspection of the fan housing and other casings to remove any tools or debris. Remember: During installation, avoid placing the weight of gas flow ducts on the fan casing. Adjust the clearance between the inlet and impeller per drawings, and maintain the shaft in a horizontal position. Note: If the centrifugal fan is installed at an angle, ensure the rear plate can rotate freely to keep the nameplate level. After installation, manually rotate the rotor using hands or a lever to check for excessive tightness or collisions. Only after confirming these points should trial operation proceed. During trial operation, personnel must also monitor bearing temperatures for normality. Under normal conditions, bearing temperature rise should not exceed 40°C above ambient temperature. Additionally, the root mean square (RMS) vibration velocity of bearing components must not exceed 6.3 mm/s. Should significant equipment vibration or abnormal bearing temperature increase occur, immediately stop the unit for inspection. To prevent motor burnout due to overload, personnel must start the forward-curved multi-wing fan equipment under no-load conditions.