NanoStream 6025 starting problem

[StrategicReef]

Help, I just received my Nano Stream 6025.

There is one annoying problem, nearly everytime I restart the power, the propeller seem to not be "blowing" and it is just kicking water out the back..

I have to put something like my hand in front of the nozzle and then it will make a loud rattle sound and then it will start to flow correctly out the front.

I have not tried to leave it running when this problem occurs, does it eventually blow forward?

 

[StrategicReef]

OK, It appears whenever the pump starts the propeller is popped out pushing against the front nozzle's grill, it seems to be pushing water backwards.

When I put something near the front nozzle, it will make the propeller fall back and go into normal position, then it will start to work properly.

Is there something wrong with my 6025? I have left it on for a minute and it will not correct itself without my intervention as described above.

 

[Lothar]

Following this one...

 

[rvitko]

In the range of 100-130V it is supposed to correct its rotation reliably within 20sec. The voltage is critical so if you have an overloaded circuit or soft start feature this will cause problems. When it runs correctly does it run quietly?

 

[StrategicReef]

It runs quietly with a slight chattering.. when it is in the correct position.

My question is if the propeller is supposed to be able to move back and forth like this?

I thought it is my controllers and power bars dropping the voltage, so I plug it directly into a power bar off the wall and it still does this.

I do have soft start but.. I am just plugging and unplugging at this point.

 

[rvitko]

Yes, the way it is supposed to work is that if it spins the wrong way it flies out like an airplane, this breaks conatct with the magnetic field of the coil, it then falls back into the field and because it was spinning the right way on the fall, like a dropping maple seed, it syncs up and goes the right way. For this to work the strength of the magnetic field has to be very exact that is why the operating range of volatge is so exact. At 130V+ the magnetic field is so strong it cannot escape and below 100V it isn't strong enough to start. From what you describe it sounds like the shaft is slightly crooked. I might suggest running it a few days, make sure the cover and everything is properly installed, get it going the correct direction and let it run continuosusly for 3 days. When the noise dissappears it should be properly aligned, the centrifugal force of the rotating magnet will center the shaft. It should then start and stop correctly. If it does not and your voltage is correct, the only possibility is the coil is incorrect. FWIW, I have tested the voltage in numerous buildings at many times of year here in Austin for just this reason, so we have a range to base our engineering on and the range I see here is 112V-127V. I don't think any part of the US should have voltage below 100V except possibly in mid summer in a household with many running appliances. It is common in Latin America to have dips below 100V. I could see a voltage above 130V being possible but unlikely. From all the tests we ran I found at 100 or below the pump just would not start at above 130V it spun backwards consistently.

 

[StrategicReef]

Thanks for the information.

I can probe the exact receptacle on the power bar and let you know the voltage. There might be slight drop in current because a some pumps and powerheads on that power bar is starting at the same time, but they should consume all less than 100 watts total. It should reach a consistent voltage after everything is started or the soft start has passed.. I think.

For now I am just going to run it a few days to see if it improves, has been running 20 hours so hopefully it will get better.

I don't have the screen too and maybe that will help, as I said if I put even a chopstick over the output it is enough back pressure to correct the propeller direction.

 

[rvitko]

PM me your info for the screen and I will mail one to you, the first batch shipped before the screens were ready.

 

[StrategicReef]

I ran it for 72+ hrs non-stop, now when I start up the pump it will make a rattle sound and go into correct direction. Which is a good thing. I am able to do it for a few times now, if I have any problems I will keep you updated.

In my opinion the manual might want to mention running it non-stop to break it in for 72 hours. This would have saved me some unnessary testing and worries.

 

[rvitko]

We are working to eliminate the initial noise and start up issues. At present they are pre-breaking in all new pumps.