Tunze Nanostream loud on start up.

[Ocean Lotion]

Anyone else with one of these pumps? When first plugged in min makes a rattle for about a second. Is that normal for these pumps?

 

[TheEngineer]

Im not sure about those pumps specifically, but most pumps will have their impeller chatter a bit while it gets up to speed and sync with the stator speed.

 

[Ocean Lotion]

Ok thanks. I did not think a Tunze would chatter. Anyone own one and can verify that they make noise on start up?

 

[reefwiser]

One could take it apart and check the impeller for any cracks in the plastic that could cause chatter. All pumps will make some noise from a dead start. Which model is it?

 

[Tikosyn]

I have 3 and I don't ever hear them, I have to inspect them to make sure they are actually running most of the time. I have the 6095's btw

 

[PrangeWay]

Are they controllable or fixed speed? The fixed chatter as there is a stop that makes sure it spins the right direction. If it's a controllable something is wrong as they are silent.

 

[Ocean Lotion]

One could take it apart and check the impeller for any cracks in the plastic that could cause chatter. All pumps will make some noise from a dead start. Which model is it?

The model is not printed on it. Second from smallest I believe.

 

[reefwiser]

Have you posted in the Tunze forum?https://www.reef2reef.com/forums/tunze.461/ Roger is great support for all Tunze products.
Here are all the models.
https://www.tunze.com/HR/en/catalogue/katalog-ii.html?user_tunzeprod_pi1[predid]=-infoxober006

 

[gcarroll]

If it's an AC pump, that is completely normal. AC pumps can start in either direction upon start up. The pumps usually have a brake to prevent this so that it does not run in reverse. That is what makes the chatter sound.

If it is a DC pump, well, you have a problem that needs to be looked into!

 

[Ocean Lotion]

AC. Thanks I won't worry then.