Low pressure sewage system manual

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PUMP OPERATIONS Step 1 Step 6(for float control systems only) Run clear water into the basin until motor housing is Float adjustment for simplex systems: Adjust covered. floats so that the water level is above the pump motor housing,and the pump shuts off when the water level Step 2 is 2 inches above the pump volute discharge. Open the shut-off valve to the discharge line. Float adjustment for duplex systems:Adjust Step 3 floats so that a pump will start when the water level Turn"H-O-A"switch to the"OFF"position and turn on is just above the pump motor housing, and pump on main breaker. override water level is 5 inches above the pump motor housing.Adjust pump shut-off so that water level is Step 4 within 2 inches above pump volute discharge. Pumps Start the pump by turning the"H-O-A"switch to the should alternate starting,between each other, upon "HAND"position. successive pump down cycles.To check override level,set both"H-O-A"switches to"OFF"position and Step 5 allow water to surpass the override level,then set both Check the pump amperage with clamp on ampmeter "H-O-A"switches to"AUTO"position and both pumps on black pump lead. Readings higher than nameplate should start. Turn off one pump and be sure second indicate clogged pump, miswiring,or improper voltage. pump starts when override level is reached on second If basin is not being pumped down and amperage trial. If pumps fail to cycle in this manner, retrace readings are considerably lower than nameplate then control float wiring panel. the pump is air locked. Step 7 NOTE: Nameplate amperage is rated at the largest Ensure"H-0-A"switch is set to"AUTO"before placing impeller diameter trim. Pumps with cut diameter system into service. impellers will draw slightly fewer amps than nameplate. If pump is air locked, refer to the troubleshooting section in this manual. PUMP TROUBLESHOOTING Below is a list of common problems and possible Pump Runs But Does Not Pump Down The Basin solutions. Refer to the pump and panel installation With The"H-0-A"Switch On Either Hand Or and service manuals for details regarding any Automatic Position. necessary adjusting,dismantling or repair work. 1. Cutters may be clogged.Amperage higher than ®DANGER nameplate may indicate this problem. 2. Pump rotation may be reversed(on three-phase Risk of electrical shock or electrocution. May pumps only). Switching any two power leads on result in serious injury or death or fire hazard. three phase pumps will correct the rotation. Installer must disconnect all electrical sources 3. Discharge gate valve may be closed. 4. Pump may be air locked. Fill basin approximately prior to installation. Only qualified personnel mayinstall or service this system. NFPA 7Q/ 10 inches or more above the ball check valve Y assembly. Raise pump assembly so that the ball National Electric Code(NEC)or local codes must check valve disengages the discharge elbow be followed. System must be properly grounded (approximately 6 inches). Stand clear from the according to NEC or local codes. sump opening to avoid spray and turn pump on for ®DANGER a brief second to clear trapped air in the volute. 5. Clogging anywhere from cutters to check valve. Cutting Risk. Risk of serious cutting or This is evident if no water discharged out of the amputation exists. Disconnect all power sources check valve after raising the pump to disconnect prior to handling or servicing pump or grinding the sealing flange. Pull pump assembly and check mechanism. Pump may start without warning. for cause of ag. Grinding mechanism is extremely sharp. Use 6. Discharge hee add mmaybe too high. Check elevation caution when handling grinder mechanism. against design point of pump. 8 05625-459-1