The negative pressure fan is a kind of equipment that uses the principle of air convection and negative pressure ventilation to cool down the effect of air exchange. It has the advantages of small energy consumption, long service life and economic benefits. But do you know how to start the negative pressure fan? What's the point? Below Hongfeng negative pressure fan introduced in detail.

(1) before the start of the negative pressure fan, the fan inlet control damper should be closed to prevent misoperation and start with load.

(2) check bearings lubricating oil level is normal, cooling water supply, the coupling is intact, whether the closed door maintenance.

(3) attention to the starting time and the no-load current is normal.

(4) the current meter indicates that the opening of the air door is in the proper position after restoring to the no-load current.

(5) check the operation of the negative pressure fan should be no exception.