How much flow does a salt system need?

Jump to latest Follow Reply
D2creative said:
1000 41w 0psi -0psi
1725 126w 3psi -0psi
2300 270w 9psi -0psi
3000 586w 15psi -0psi
3450 895w 19psi -0psi but bouncy
Click to expand...
New filter arrived and I popped it in.
OMG! So THIS is how a pool is supposed to run?! 😳🤦‍♂️

It’s basically running at the exact same psi at every power as it did with no filter at all. And just looking at the water exiting the return jets in the pool, it looks like easily twice the flow. I would assume this will all change over time as the filter pores clog up but dayumn. I even tested it at 600 rpm for a minute and the salt system was still able to detect flow.

So here’s the new numbers with the new filter in place. Old numbers quoted above for comparison:

1000 41w 0psi -0psi
1725 142w 0psi -1psi
2300 301w 0psi -2psi
3000 651w 4psi -4psi
3450 956w 6psi -6psi

Those numbers on the last three are best guess. The needle is all shaky so I just tried to see what was in the middle of the shake.
 
  • Like
Reactions: Newdude, Ahultin, JoyfulNoise and 1 other person
It looks like the pump is wired for 115 volts, which should be fine as long as you don't need full power.

The pump should be able to meet the flow requirements as is.

Note that the vacuum gauge is in inches of mercury and not psi.
 
  • Like
Reactions: JoyfulNoise
I would rewire it for 220V if it were my pump. It’s silly to have a de-rated pump and, if the cartridges load up again and can’t get clean enough, you’ll be back to same spot. At least at full rating you’re more likely to keep the flow switch in the SWG happy.
 
JamesW said:
It looks like the pump is wired for 115 volts, which should be fine as long as you don't need full power.

The pump should be able to meet the flow requirements as is.

Note that the vacuum gauge is in inches of mercury and not psi.
Click to expand...
Here's a pic of the wiring coming into the pump.
Looks like two hot wires and ground. Isn't that 220?
The electrician is supposed to be back this week to wire in the temp sensor so I can double check with him.

EDIT: I remembered I had a multimeter, and the battery actually wasn't dead. lol
I'm getting a reading of 240.


IMG_2436.jpg
 
Last edited:
  • Like
Reactions: JoyfulNoise
At 230 volts, the max power is 1,700 watts from the manual.

The motor shows 6.3 amps at 240 volts, which is 1512 watts or 7.2 amps at 115 volts, which is 828 watts.

The power of 956 watts at 3,450 RPM seems too low if the motor has 230 volts available.

At full speed, the power should be closer to 1,500 watts.

956 watts more closely matches the power expected at 115 volts.

Maybe there is a big voltage drop at full speed?

Does the voltage stay the same at full speed or does it drop some?

Did you check the current (Amps) at full speed?


full

full


1680397251541.png
 
956 watts divided by 7.2 amps is 132.8 volts.

For full speed at 230 volts, I would expect a minimum of 1,200 watts up to about 1,500 watts.

So, something seems off.

Did you happen to check the part number for the impeller when you had it apart?

It should be a SPX2710CM impeller.

Impeller for 1.5 HP Max-Rate Pump.

Check the voltage and current at 3,450 RPM and multiply them together to see if they match the display power reading.

Are you measuring line to line or line to ground?

You should measure the voltage line to line.
 
Last edited:
JamesW said:
956 watts divided by 7.2 amps is 132.8 volts.

For full speed at 230 volts, I would expect a minimum of 1,200 watts up to about 1,500 watts.

So, something seems off.

Did you happen to check the part number for the impeller when you had it apart?

It should be a SPX2710CM impeller.

Impeller for 1.5 HP Max-Rate Pump.

Check the voltage and current at 3,450 RPM and multiply them together to see if they match the display power reading.

Are you measuring line to line or line to ground?

You should measure the voltage line to line.
Click to expand...
My menu system is a bit different. It doesn't have some of those options so I can't read the amps... unless there is some other way to do so?
At full speed it seems pretty steady today at 972w.
I didn't have the pump apart to be able to see the impeller. I just followed all the vids that say to remove the basket and reach in with a tool to clear any debris.
I measured from line to line.

Screenshot 2023-04-02 at 8.01.27 AM.jpg
 

Enjoying this content?

Support TFP with a donation.

Give Support
Did you measure the voltage at full speed?

You can use a clamp ammeter to check the current.

To really check the impeller, you need to open the pump and look into the impeller.


The manual you are using is for the SP2303VSP model.

SP2303VSP | MaxFlo VS | Pumps | In Ground Pool Pumps - Hayward Pool Products

MaxFlo VS™ brings variable-speed technology to the favorite, traditional MaxFlo pump family. MaxFlo VS is a drop-in upgrade that will deliver up to 80% energy cost savings over single speed pool pumps.
www.hayward-pool.com www.hayward-pool.com

1680458422485.png
 
  • Like
Reactions: JamesW
JamesW said:
Ok, it seems like the problem has been resolved, so probably not worth doing more diagnostics unless you have further problems.
Click to expand...
I'm going to check the impeller as soon as I have time just to make sure but yeah, at the moment it seems to be running OK.
Thanks for all the help, much appreciated it. :)
 
  • Like
Reactions: JamesW
You must log in or register to reply here.
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Top Bottom
Back
Jump to latest Follow Reply