Pump burnout

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John and jill

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hi,
I installed a flotec 6s 10 months ago, using a yaoda skd-3 control valve. After 9 months use, the pump stopped, I checked the valve and pump, found the pump had either a broken shaft or impeller, actually the motor had burnt out. Received a free replacement flotec 6s plus, fitted and fired it up, worked superb for 4 weeks, then no water on demand, pulled up pump, Same problem pump motor burnt out. Can anyone help me with what the problem might be, I suspect electrics, but have checked the control valve wiring, it seems ok, I cannot get an English version of. Wireing diagram, can anyone help with this.

Best regards.

John.
 

Craigpump

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Quit using Flotech pumps, use a conventional Square D pressure switch.

Is the tank in good condition?
 

Valveman

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Your problem is that Yaoda thing, not the pump. I didn't know what it was and had to look it up. A picture was all I needed. I had to laugh. That is the same old "Masscontrol", "Prescontrol" thing I have seen with at least a half dozen names in the last 25 years. Seems like every few years they come out with a new name for that thing, and people fall for it all over again. There are also several similar ones like the Davey Torrium, A lot of other pump companies have one of their own with different names. It is usually a little box mounted directly to the pump like on the Grundfos MQ, so you have no choice but to use a control that will shorten the life of the pump. And this method will really shorten the life of a submersible.

It is a pressure/flow on and flow off control for the pump with a flow switch that works at about 1/6th of a GPM. It also has a small built in pressure tank about the size of a teaspoon. Jets and centrifugal pumps will survive a little while on one of those "controls", but it works at too low a flow to cool a submersible, and has too small a tank to prevent rapid cycling, either or both of which will make short work out of a submersible.

A Flotec is not a high quality pump to start with. So you want a control that will maintain a minimum of 1 GPM flow, has enough of a pressure tank to eliminate rapid cycling, a regular pressure switch, and a pressure relief valve. Then even a Flotec has a chance of lasting a long time. Here is a video.
 
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