In fact, the direction of installation of the fan, whether the motor is outside or inside, depends on the choice of exhausting air outside or supplying air to the 'inside if the engine is inside and air is supplied inside. , then, when it is necessary to draw air from outside, the fan must be installed on another side so that the motor is outside. Of course, if the motor has the necessary conditions to achieve reverse rotation by modifying the wiring, it is not necessary to install it in reverse.
1. Check if the fan damper is open. 2. Check if the fan coupling is broken, preventing the fan blades from rotating. 3. Check if the boiler air chamber damper is open. the above checks are normal, check the blown air. If the air passage is blocked or not, the boiler has not cleaned the air chamber for a long time and theair door is easily blocked. 5. Others can only be determined on site.