Basic Considerations for Commissioning Axial Flow Roof Fans

Basic Considerations for Commissioning Axial Flow Roof Fans

Compared to standard fan units, axial flow roof fans are not only structurally complex but also high-performance products, and their operational effectiveness is influenced by a variety of factors. To ensure the fan operates at its full potential, it is advisable to carry out commissioning before the user commences operation, so that the unit is optimised in every respect. Prior to commissioning the axial flow roof fan, whilst gaining a comprehensive understanding of the equipment, it is necessary to verify the assembly of various components, the connections of the electrical circuits, and the stability of the operating voltage. If no issues are found, the commissioning procedure may commence. Although the axial flow roof fan is fully automated, at least two people are required to oversee the trial run. One person is primarily responsible for controlling the power supply to the fan, whilst the other monitors the fan’s operation. Should any abnormalities be detected, stop the operation immediately to carry out an inspection and continue only after troubleshooting has been completed. In the case of axial flow roof fans, please take particular care during commissioning. Start-up must be performed at low speed to verify that the direction of rotation is correct. Once the axial flow roof fan is at a standstill, it may be started at high speed. This is to prevent various hazards associated with high-speed reverse rotation. Once the centrifugal fan has reached its normal operating speed, measurements of the input current, supply voltage and power consumption may be taken.