Maintenance of negative pressure fan

    First, for the maintenance and maintenance of the motor 1 disconnect the main power, check the motor ground wire is good. 2 fasten the various parts of the screw and coupling. 3 Check whether the insulation resistance of the motor meets the regulations and check the main circuit contact. If the contact is seriously ablated (contact point wear to the original thickness of 1/3), should replace the contact. Note: in the maintenance of the power should be linked to the brand, inform people are being repaired

    Second, for the maintenance of the air valve: 1 adjust the belt tightness, hand wheel dynamic wheel, observe the rotation is smooth. 2 Check and replace the gasket and seal packing between the joints. 3 Clean the motor and the wind wheel, the filter and the inside of the case. For paint off the Department should be covered brush. 4 to the rotating parts of the filling lubricants to ensure that the coupling and bearing flexibility and stability

    Third, the electrical circuit maintenance, maintenance: 1 check the valve opening and closing operation of the valve is reliable, flexible, open and close angle mark clear. 2 manual start check the lights and voltage, ammeter work is normal, the fan parts are running different sound, three-phase current value is balanced. 3 a comprehensive check the remote control box inside the box is normal. 4 three consecutive open and shut down, check the remote control is correct and reliable. 5 test run two hours, observe the motor bearing temperature, motor temperature is normal. Make sure the fan is operating properly. For negative pressure fan should be regular maintenance every six months, and record the situation, to ensure good operation of negative pressure fan.