1. First study the fan catalogue: its model, type, impeller rotation direction and airflow direction. Before installation, check the impeller for rubbing, inspect all parts and accessories for completeness, and confirm the blade fixings are tight. Check for transport damage or deformation; repair before fitting.
2. The ducts at the inlet and outlet must have their own supports; never load the fan body with duct weight. During fitting, set the fan level and align the joint to the foundation and the outlet duct so they meet naturally โ do not force them.
3. After fitting, turn the impeller by hand or lever to check for tightness or rubbing and for any obstruction. Only then run a trial. The exposed drive needs a guard (supplied by the user). If the inlet is open, fit a screen or other safety device (user-supplied).