Title: Instructions manual - THGT fan.pdf
Impeller removal, motor replacement: Version 1: impeller mounted to motor shaft with keyway. Version 2: Impeller mounted to motor shaft with taper lock.Typical: axial diameters < 710mm Typical: axial diameters > 710mm8.3.1.Isolate and lock off power to fan. Disconnect motor power cables.8.3.2. Remove adjacent ductwork to provide access to fan impeller.Can complete fan be removed to workshop for repair, or impeller removed in-situ? Small fans maybe easier to move to workshop, whilst large fans may need special lifting facilities to support / lift impeller and motor. Ensure all materials and tools needed are available. Fig 2.8.3.3. Mark exact position of motor feet, to ensure replace in exact same location.Fig 3.338.3.4. Remove the impeller fixing bolt, washer from motor shaft and retain. Fig 4