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tunze osmolator universal 3155 auto top off issue.


Haelstrom

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After power returns the pump starts running for several seconds even though the tank level has not changed. It filled an entire 16oz solo cup. This happens every time the power is returns. Regardless of the water level. Is this normal?

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Yes, but 16oz? Mine only turns on for a couple of secs. Though, I must say, I have never actually measured the amount. You can try restricting the flow on the tubing If you think this will become an issue. But, 16oz on a 75g is nothing to be worried about. Well, unless your power goes off multiple times a day. :D

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There's a jumper inside the unit that allows you to select the pump speed. Try setting it to low.

 

The new units turn on for too long after power on IMO. It's a bit annoying.

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Thanks. Wasn't sure if it was just mine. A second or two would be fine. But it just runs too long. I just hope I don't have power issues after I start dosing kalkwasser. I could have some serious issues. It filled an entire red solo cup. Which is 16 oz. 16 oz in a 75g is no problem. I just worry about it when I start kalkwasser.

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After power returns the pump starts running for several seconds even though the tank level has not changed. It filled an entire 16oz solo cup. This happens every time the power is returns. Regardless of the water level. Is this normal?

 

Stop turning the power off. :)

 

Are you using the included pump or have a 110 pump hooked up?

 

There's a jumper inside the unit that allows you to select the pump speed. Try setting it to low. The new units turn on for too long after power on IMO. It's a bit annoying.

 

 

There's not a jumper. It is a potentiometer. Remove the cover by removing the screws on the rear of the control unit.

 

Adjust the potentiometer to the minimum setting required to permit flow, yet high enough so that evaporated water is replaced prior to the auto shutoff safety feature is activated. Too low of a setting would not allow the pump to overcome the head pressure. Too high of a setting causes too fast filling. Test it, and relax with confidence.

 

Oh - make sure your tube is not submerged in the water to prevent a syphon.

 

Yes, but 16oz? Mine only turns on for a couple of secs. Though, I must say, I have never actually measured the amount. You can try restricting the flow on the tubing If you think this will become an issue. But, 16oz on a 75g is nothing to be worried about. Well, unless your power goes off multiple times a day. :D

 

Restricting the flow? You can't be serious. Doing so would increase pressure of the output and cause increased wear on the pump. This might be the only option with some other ATO systems but the Tunze has a feature to adjust the power of the pump.

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Stop turning the power off. :)

 

Are you using the included pump or have a 110 pump hooked up?

 

Using the pump that came with it.

 

 

There's not a jumper. It is a potentiometer. Remove the cover by removing the screws on the rear of the control unit.

 

Adjust the potentiometer to the minimum setting required to permit flow, yet high enough so that evaporated water is replaced prior to the auto shutoff safety feature is activated. Too low of a setting would not allow the pump to overcome the head pressure. Too high of a setting causes too fast filling. Test it, and relax with confidence.

 

Oh - make sure your tube is not submerged in the water to prevent a syphon.

 

 

 

Restricting the flow? You can't be serious. Doing so would increase pressure of the output and cause increased wear on the pump. This might be the only option with some other ATO systems but the Tunze has a feature to adjust the power of the pump.

 

 

I use the pump that came with it. The filling tube it not submersed. I would not restrict the flow. I think I will adjust the potentiometer to reduce how much is dumped in.

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  • 6 months later...

I just ordered a 3155 today. Would adjusting the potentiometer void the waranty and does Tunze talk about this function in any of it's manuals or from customer service.

 

I have a 7 gal tank and this issue could be a problem for me. I'm also not very good with electronics so is adjusting this easy?

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is your line going into your tank submerged? or outside the water? I had my line under water so it was creating a siphon and making my pump run often.

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If folks need to reduce the water flow the best way would be to add a "T" and of some sort of adjustable tap.

 

This way you can divert extra water back to the top-off reservoir without adding much strain to the pump.

 

It would just take a little longer to top-off your tank which I don't see as being much of a problem.

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1fishmonger

I just ordered a 3155 today. Would adjusting the potentiometer void the waranty and does Tunze talk about this function in any of it's manuals or from customer service.

 

I have a 7 gal tank and this issue could be a problem for me. I'm also not very good with electronics so is adjusting this easy?

 

No.

 

It's simply adjusting a dial...It's pretty brainless. Tunze pumps have a mimimum duration that they can be on for. Older model 3155s do not have the flow adjustment dial option as far as I know.

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I have the same issue it will run for a few seconds on a power off. Once on a vacation it did not even top-off even when there was water in the container. I understand the float switch can get stuck but it also has an 'eye' as the call it.

 

On occasions it has dumped quite more water into the sump and then sent the alarm off for no reason....pretty stupid for a 100 USD + equipment.

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I just ordered a 3155 today. Would adjusting the potentiometer void the waranty and does Tunze talk about this function in any of it's manuals or from customer service.

 

I have a 7 gal tank and this issue could be a problem for me. I'm also not very good with electronics so is adjusting this easy?

 

If I recall, the manual directs you to do so. What it does is control voltage of the pump. For smaller tanks you can dial it back. For larger tanks you can increase the flow. You also have to have it adjusted properly for the head pressure if your container is much below your tank.

 

If folks need to reduce the water flow the best way would be to add a "T" and of some sort of adjustable tap.

 

This way you can divert extra water back to the top-off reservoir without adding much strain to the pump.

 

It would just take a little longer to top-off your tank which I don't see as being much of a problem.

 

That's a very good idea if your using the 3152 which isn't adjustable, but unnecessary for the 3155.

 

No.

 

It's simply adjusting a dial...It's pretty brainless. Tunze pumps have a mimimum duration that they can be on for. Older model 3155s do not have the flow adjustment dial option as far as I know.

 

You mean a maximum duration that they can be on for?

I have two 3155s and one is several years old. Both are identical and include the potentiometer - not sure how old you are referring to.

 

I have the same issue it will run for a few seconds on a power off. Once on a vacation it did not even top-off even when there was water in the container. I understand the float switch can get stuck but it also has an 'eye' as the call it.

 

On occasions it has dumped quite more water into the sump and then sent the alarm off for no reason....pretty stupid for a 100 USD + equipment.

 

The 3152 uses a float only. The 3155 uses an optical sensor. I've never had issues with either of mine, however it's a good idea to clean this on occasion. The float switch on the 3155 is a high level backup only. Yes the pump does turn on for a few seconds each and every time it goes from a power off to a power on state. I assume it's part of a power on self test it does. Are you sure yours are setup properly? I'd be happy to help. If it's not in the correct chamber in your sump then it won't work properly. I've never had trouble with mine.

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The 3152 uses a float only. The 3155 uses an optical sensor. I've never had issues with either of mine, however it's a good idea to clean this on occasion. The float switch on the 3155 is a high level backup only. Yes the pump does turn on for a few seconds each and every time it goes from a power off to a power on state. I assume it's part of a power on self test it does. Are you sure yours are setup properly? I'd be happy to help. If it's not in the correct chamber in your sump then it won't work properly. I've never had trouble with mine.

 

I have the ATO setup correct with the sensor on the return section. That is the section where loss of water due to evaporation has the the water level go down. The water from the ATO pump is directed the section of the sump which is 1 baffle before.

 

The tunze ATO works well - very precise but it has it quirks

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I have the ATO setup correct with the sensor on the return section. That is the section where loss of water due to evaporation has the the water level go down. The water from the ATO pump is directed the section of the sump which is 1 baffle before.

 

The tunze ATO works well - very precise but it has it quirks

 

Sounds like you have it setup right. I'd contact Tunze if your still having problems because "quirks" could lead to a disaster.

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