He paid to have wiring/ float work done about 3 years ago. He told me last night one set of float switch wiring was burned up. He has never done any of the work on it except to remove this last pump. I told him I would install one if I was him. Nothing is ever simple.even pumping SH**. On such systems there is a control box that alternates the 2 pumps on each cycle, and also has the latching relay circuits that you are talking about. Sometimes there are just 3 floats and the high alarm and backup pump are wired to the 1 float. I've never really looked too close at a residential system, but I have played with many larger pump systems, and often there are 4 floats on such systems: Float 1= "cut out", Float 2= "lead pump cut in", Float 3="Backup pump cut in", Float 4="high alarm". Like you said, it needs some kind of differential to prevent short cycling. Who knows if your friend installed his correctly, or if it was modified after the fact. In the case you are describing, the upper float might just be an alarm float, and the off/on differential is done with the bottom float. In the case of the one that Kenny posted, the "differential" is mechanically built into the float.It clicks on at a certain angle, and then stays made until a certain cut out angle is reached.Ī simple sump pump with a linear rod simply clicks on and off with 2 different stops on the rod. I know there are a couple sharp electricians on here so I thought I would post it here to help me figure it out. It's early and maybe it will come to me after my coffee kicks in but right now I am not figuring it out. The pump is 220 and the part I cant seem to get my brain wrapped around is how the two float setup works without using a latching relay. Seems the pumps with a single float would not work for such deep setups and short cycle. This makes sense to me as a single float wouldn't allow it it pump the tank from high to low. The PVC piping from the bottom of pump had two floats clamped to it. The tank the pump sits in is pretty tall. I am having a hard time grasping how the thing worked which I need to figure out for when he gets the replacement pump. We got him up and operational in a temp fashion so that's no problem.Įverything was disconnected and a lot of the wiring burned up so I was unable to see what the original setup was. I went over to my friend Scott's yesterday to help him rig up a temporary pump for his septic effluent system.
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