Question about Black & Decker Husky 750w Power Inverter

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Appropriate size inverter for sump pumps

What size inverter do I need to use for a submersible sump pump - discharge of 3800 gph at 14 ft. lift with pressure switch? Will the Husky 750 work?

Posted by luke47334 on

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First...you need to find the amperage on the pump...your inverter is rated for 6.25 Amps...(750/120)...you will need an inverter bigger then the pump..I would suggest at least 1.5 times the size of the pump..bear in mind,..the inverter wasnt designed to start motors...so oversizing is needed..

Hope this helps

Posted on May 07, 2009

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What size power inverter do i need for rs3 1/3 hp submersable pump?


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1/3 Hp motor amp draw chart by household voltage:
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HOW TO TURN ON PUMP??


The pump should start by itself and shut off by itself as well. The float switch needs replacing. If new, return it. If you want to test the pump, separate the two plugs and plug in the one that leads to the main pump body.

Aug 28, 2011 | Flotec FP0S2400A-03 1/3 HP 2,500 GPH...

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May tsurumi submersible pump is overheating.do i need to oil on the plug of the of the pump? Is it ok if increase the discharge diameter? What will be effect of it? Hope u could enligthen me on this...


This is a single phase induction motor. You mentioned it is overheating. You did not mention whether or not you had easily turned the pump by hand. Pumps overheat for several reasons but these are the top 4:
1. The head pressure is too high as in the pump is being used to pump water higher than the head level of the pump. (Lift distance to high)
2. Low utility or generator voltage. Lower than the pump rated input power requirements.
3. Bearing Friction or motor / bearing mis-alignment ( 3. Pump is sitting in debris while pumping and the pump inlet is being blocked by debris. Also... if it sat in clay and the clay dried inside the pump it can restrict water passages to the point that the pump just can not pump enough water to stay cool.

Does it overheat when pumping at 15 feet or less? I note that this is actually a 1/2 Hp pump. The max LIFT distance for most 1/2 Hp Pumps is 23 feet or less using a 1 1/2 in discharge. The lift will be even less with a 2 inch discharge outlet. As for oiling the pump... Most submersibles always have oil above the impeller and it usually does NOT leak out unless the seal between the impeller and the motor stator / aramture has failed letting water into the winding. That plug you mentioned is for checking to see if water is in the winding area. If you pull the plug and get water the seal is bad. Hopefully you can save the winding.

You asked what the effect would be if you went to a larger discharge diameter. This will give you more volume but less head / lift distance.

Thanks for choosing FixYa.
Kelly

Apr 06, 2011 | Tsurumi Pump s Submersible Water Pump ...

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The is no water in the hole where the sump pump so why is it still running?


Hi,
The float that turns the pump on and off is bad or stuck...
Pull the pump out and check the float... if it shuts off the find out what was holding it up...if it still runs the float is bad and will need to be replaced...

heatman101

Mar 23, 2011 | Genius Switch Submersible Sump Pump...

1 Answer

Pumb only pumps a small amount out of the basin. Float needs adjusting to go all the way down and empty the basin. How do you adjust the float/bulb to travel farther down without shutting off after only a...


Flotec website shows several submersible sump pumps, and pump types:
http://www.flotecpump.com/asp/productapplication.asp?AId=28

Click product, then click on 'parts and literature' to access manual
Here is a Flotec manual:
http://www.flotecpump.com/pdf/FP525%2811-1-06%29.PDF

Manual for this type of sump pump says:
Quote from manual: Automatic float switch is sealed and factory adjusted for
most home sumps. Turn-on water level is 10" - 12" above
pump base. Turn-off water level is 4" - 6".

The manual also says that running the pump when dry will ruin the seals.
This implies that the water level setting is set so the seals will not be damaged

You might be able to dig the sump deeper, but I don't know if that meets your objective.

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Replace the float with either a pressure operated float switch, or a verticle float that has a rod in the center, Home Depot has ubiversal floats of all three variations.

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That's a lot of water. In the U.S. , pumps are rated in GPM (gallons per minute. Your 20000 liters per hour converts to 88 GPM. So you need to find a pump that can produce at least 88 GPM.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

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