What precautions should be taken during the use of glass fiber reinforced plastic negative pressure fan？

1. Installation precautions
The glass fiber reinforced plastic negative pressure fan should be installed at a high position in the factory building, using the principle of hot air rising to improve heat removal efficiency. Avoid obstacles blocking the air inlet and outlet, and ensure that there are no obstacles within 2 meters before and after the fan to prevent air flow obstruction and increase load. The contact between the fan and the wall needs to be sealed with glass glue to prevent air leakage and rain leakage. Use angle iron and expansion screws to reinforce the bracket to ensure that there is no obvious shaking after fixing. For hollow bricks or lightweight walls, polyurethane foam or grouting materials need to be filled in advance to enhance the support force to avoid only fixing on thin walls and causing falling off.

2. Startup and operation
Before starting, close the fan inlet regulating damper to prevent starting with load. Check the bearing lubrication, cooling water pipe water supply and coupling for integrity, and ensure that the protective net and shutters are in a closed state. Observe whether the no-load current is normal after starting. If the current is abnormal, stop the machine and check the circuit or motor. Pay attention to the opening angle of the blinds (normally 60°). If it cannot be fully opened, clean the dirt or adjust the manual switch. After stable operation, gradually adjust the damper opening to avoid sudden increase in load and motor overload.

3. Environmental adaptation and safety requirements
In high humidity or corrosive environments, 304 stainless steel or explosion-proof motor models should be selected, and anti-rust grease should be applied regularly. When stored in the open air, it needs to be covered with rainproof cloth to avoid moisture causing motor short circuit. Ensure good ventilation around the fan to avoid high temperature environment causing motor overheating. When the noise exceeds 65dB, the balance of the fan blades or bearing wear should be checked.