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27 Paul W. Donoho, R.E.H.S. #6227 (530) 701-9972 d _ o O&M MANUAL COMMERCIAL TREATMENT SYSTEMS Maintenance a • t. Pump failure or bad electrical connection—Check the panel to c.Tank leaks—If the hydraulics of the system do not allow for verify the motor contactor engages.If it engages but the pump siphoning,it is likely that the tank is leaking.Fill the tank to a doesn't operate,then it is either a pump failure or a bad electrical normal operating level and return to inspect the tank at a later connection. time.Jf the liquid level is below the normal operating level,the g.Water in splice box or loose wires—Remove the access riser tank is leaking and needs to be repaired or replaced. lid and the stainless steel screws from the splice box lid,being d.Clogged pump vault cartridge—If the pump vault cartridge is careful not to drop the screws into the tank.It the splice box was clogged,the pump may be high cycling,causing the liquid level in submerged,or if there is a crack in the conduit,there may be the vault to drop faster than the liquid level in the tank.Remove water in the splice box.If this is the case,remove the water with the fitter cartridge and clean it in accordance with the instructions a baster,sponge,or other appropriate method.Carefully check provided in Appendix B. the splices to ensure they are intact and remain watertight.If all splices are found to be watertight,replace the splice box lid.In the Removing&Replacing Inoperative Floats control panel,carefully tug on each wire going to the splice box. IMPORTANT!Before doing any work on either the wiring to the Correct any wires that are loose.Reactivate and retest the system. level control floats and pump or inside the control panel,switch off h.Leaks in tank or system—If the system operates but can't keep the power to the system at the service entrance panel and set the up with the flow,check the system for watertightness.A leaking circuit breakers in the panel to their"OFF'positions. tank can infiltrate enough water to overcome the pump.Also 1.Remove the float assembly from the vault.There is no need to move check for leaking fixtures in the facility or home,though it is the settings of the floats to remove and replace a float.After noting unlikely a leaky fixture could provide enough liquid to overcome the tether length,snap the inoperative float out of the holding collar, the pump, 2.Remove the stainless steel screws from the splice box lid,being Low Liquid Level Alarm careful not to drop the screws into the tank.If the splice box was 1.Determine the actual flows in the system.If the flows are submerged,or!f there is a crack in the conduit,there may be water considerably less than the timer is set for,then adjust the timer in the splice box.If thls is the case,remove water with a baster, settings to match current flaws.If a low level exists in the drainfield sponge,or other appropriate method.Loosen the cord grip at the pump basin,then ensure the minimum run time is appropriately set. splice box and identify the appropriate splice for the float Cut out the splice and,if using a watertight wire nut for the common wires, 2.When a low liquid level condition exists,the source of the problem is remove the appropriate common wire. likely to be one of the following: 3.Remove the inoperative float and replace it with a new one.Push the a.Ball valve mechanism jammed—Visually inspect the recirculating float cable through the watertight cord grip into the electrical splice valve and verify the liquid level in the tank is within the normal box.Leave an adequate length of electrical cord coiled inside the range.Consult the design plans for proper operating level.If low, riser to allow for easy removal of the float assembly.Bo not remove the ball mechanism could be jammed in the seated position. the colored markers or the paper tags from the float cords,and do Remove,disassemble,and inspect. not try to thread the markers and tag through the cord grip.Tighten b.Tank siphoning—Inspect the iiquid level in the tank.If the liquid the cord grip by hand,then test the tightness of the cord grip by level is below the"Redundant Off/Low Level Alarm"float,then tugging on the cord.A cord is secure when the cord grip is tight it is likely that the problem is either a leaky tank or siphoning. enough to prevent slippage.An adequate length of cord should be Siphoning typically occurs when the system is pumping downhill. left within the splice box 10 allow for future disconnecting and re- A system will not necessarily siphon every time it operates.It is splicing. dependent on the system design.A siphoning system can be retrofitted with an anti-eiphon valve.Most siphoning problems will manifest in the first months of operation. - Copyright Creno Systems®,Iric�Property of Orenco Systems®,Inc.On not reproduce or distribute without written authorization hum Orenco:800-348-9843, - AIM-0NI-ATX-3,Rev.2.1,05115