Laserfiche WebLink
(b) Check blowers against manufacturers recommended minimum speed to <br /> provide cooling. Increase speed of blower if necessary. <br /> (c) Check blower lubrication and ease of rotation of blower shaft when turned by <br /> hand. <br /> 2. Check blower belts for wear or tension. When the drive is running under full load, <br /> a slight bow should appear in the slack side. Excessive tension may overload <br /> shaft bearings and result in early belt and bearing wear. Excessive wear may be <br /> the result of poor alignment of the motor and blower sheaves. <br /> 3. The blower's gear case should be drained every 1500 hours or approximately <br /> every two- (2) months. If the blowers are operated continuously, refill gear case <br /> with oil of weight and type recommended by the manufacturer. <br /> 4. Lubricate blower shaft bearings on a monthly basis with chemically neutral ball <br /> bearings lithium base grease free from graphite. Remove, fill and drain plug and <br /> purge old grease by pumping new grease until it cornes out. Replace drain plug. <br /> 5. The Aeration tank should be checked for uniformity of air distribution. Uneven <br /> distribution can be adjusted by means of the valve located at the top of each drop <br /> pipe. Air diffusers will seldom clog or require maintenance, it this is necessary, and <br /> the drop pipe can be disconnected at the union provided and removed from the <br /> Aeration Tank. Turn off air valve prior to removing drop pipe assemblies. <br /> 6. Remove any large solids that have collected in the bar screen or screening basket, <br /> if provided, and dispose of by burying, burning or hauling to proper disposal area. <br /> 7. Check the appearance of the Aeration Tank contents. A satisfactory operating <br /> plant will have a heavy concentration of brown sludge in the aeration <br /> compartment, and be free of any objectionable odor. Should the appearance of <br /> the aeration contents be dark gray or black color and have a septic sewage odor, <br /> an inadequate air supply would be the cause. More air should be supplied by <br /> increasing the blower run time, or by starting second blower, if unit is a duplex <br /> blower installation. With experience, the need for additional air can be accurately <br /> gauged by the appearance of the Aeration Tank contents. <br /> & Check the clarifier tank on the hopper portion of the unit. If the plant is operating <br /> satisfactorily, the sludge should settle readily and the water in the upper part of the <br /> final tank will be clear and free of solids, not cloudy or turbid. <br /> 9. Check the liquid surface around the airlift skimmer to make sure tank is moving <br /> toward airlift. Adjust skimmer, if required. <br /> 10. Check that the sludge airlift pumps are operating continuously and discharging <br /> sludge at a constant rate. <br /> pcs/0&m,'s?artup-pre?i minae-1-5 <br />