Can the exhaust fan be used under negative pressure?

Negative pressure exhaust fan is normal. The usage method is as follows: 1, fully familiar with the sample of negative pressure exhaust fan, familiar with the specifications, models, impeller rotation direction, air flow in and out direction, etc. Before installing the fan, check whether there is any rubbing phenomenon on the impeller, and conduct a comprehensive inspection on all parts, whether the accessories are complete and whether the connections of all parts are fastened. Carefully check whether the blade is damaged or deformed due to transportation, otherwise it should be repaired before installation.

2. The air duct connecting the inlet and outlet of the fan should have a separate bracket, and it is not allowed to add the weight of the pipeline to the parts of the negative pressure exhaust fan; When installing the fan, pay attention to the horizontal position of the fan, and adjust the connection between the fan and the foundation and the air outlet pipeline to make it match naturally, and forced connection is not allowed. 3. After the negative pressure exhaust fan is installed, pull the impeller by hand or lever to check whether it is too tight or bumped, and whether there are any items that hinder the rotation. If there is no abnormal phenomenon, the test run can be carried out. The exposed part of the fan drive should have a protective cover (provided by the user). If the fan inlet is not connected to the pipeline, it is also necessary to add a protective net or other safety devices (provided by the user).

4, negative pressure exhaust fan wiring must be correct and reliable, fan shell should be correctly grounded, grounding must be reliable. The power supply of the fan must be complete and meet the relevant requirements. Fan wiring must have professional electrician wiring knowledge.

5. After all fans are installed, check whether there are tools and sundries in the fans.