Wuhan fiberglass roof fan DWT roof fan DWT roof fan manufacturers instructions Heng Hing air conditioning

Fans device body temperature than normal, the following main reasons: The first: the lack of phase motion or wiring error; second: the system resistance is too large or the optional fan motor overload caused by an irrational, reason the pipe network resistance coefficient is too large or pipe coefficient Valve does not open; third: the power pressure is low; fourth: motor bearing damage, with a small gap, does not meet the requirements. Fan body too is actually a more serious problem, especially for axial fans, roof fan these have important mechanical equipment, there is a little unusual place, it will affect the normal operation of the machine, it should be attention. The fan runs while working medium is industrial air, medium or less than 70 degrees. When the medium temperature is 25 degrees, relative humidity less than 95%, the amount of dust medium (containing solid impurities) should not exceed 100 mg / cubic meter, such as the fan operating conditions exceed the above specifications, to be presented at the time of the order, for special design. Plant extract from the fan performance, refer to the standard conditions (temperature is 20 degrees) relative to the cloud National Day 50% 101325Pa atmospheric pressure less than 760 mm Hg, gas specific gravity 1.2 kg / cubic meter of air performance. If the fan work in non-standard conditions, its performance will have to pass the appropriate conversion formula. Fans strength design by following indicators design: Fans in wind speed is less than equal to 25m / s normal use conditions, the fan does not break under extreme field hair Winds V = 32m / s condition. Installation, use, maintenance, installation should be carefully checked before each fan parts, couplings for damage, loose and so, if it is replaced or corrected, paying particular attention to whether the impeller between the damage and polished blade and duct clearance is uniform, the direction of rotation of the impeller is correct. Installed base surfaces should be smooth and be 100-200 mm above the roof to prevent water seepage, leakage. And shall be burying bolts. After installation, test operation, data should be checked before shipping blade angle and the motor power is specified on the product nameplate consistent. If discrepancies should immediately stop using to prevent burn out the motor. In the course should always pay attention to is functioning properly, it should be timely maintenance, after a period of time should be clean, dust, and grease lubrication each injection hole. Check the tightening nut, ensure a secure to prevent loosening. In case of heavy snow during the winter freeze, you must always start the fan, to prevent snow clogging fan outlet.