[RE-wrenches] Pump control

[William Miller]

Mac:

We've dealt with this.  The best solution is altitude.  If there is any 
terrain on which you could put the tank, you save a lot of complexity.

Alternatively, can the well pump deliver into a pressure tank, 
pre-pressurizing the water?  This would also save a bunch of extra parts.

William


At 07:40 PM 12/14/2011, you wrote:
>Wrenches, wrenchers and wrenchees,
>
>I've got a pump control question.  Working on a stand-alone pumping 
>station in Haiti.  I am planning on using a Grundfos SQflex pumping system 
>with a Cu 200 and a float switch.  Also needed on site, is a small 
>pressure pump to force water through a purification system.  This part 
>won't take much power, and the cistern will sit full most of the time, so 
>I'd like to be able to take advantage of this.  I am thinking that I would 
>like to figure out a control system that works off of the float switch 
>that when the float is up, the array leads disconnect from the pumping 
>system and connect to a charge controller that charges up some batteries 
>that will be used to power the pressure pump.
>
>Has anyone designed anything like this?  Any ideas on how to do this?  I 
>think I can use an op amp to amplify the 15 mA signal on the float switch 
>to push a relay, but that may not be as reliable as it should be.
>
>Thanks in advance.
>
>Mac Lewis
>--
>
>
>
>Mac Lewis
>
>"Yo solo sé que no sé nada." -Sócrates
>
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Miller Solar
Voice :805-438-5600
email: william at millersolar.com
http://millersolar.com
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