Safety issue with electric toilet

[goboatingnow]

As a result of my Jabsco issues I recently replaced it with a electric conversion unit from osculatii , it has two seperately controlled pumps one seawater into the bowl and another pump to holding tank.

The attached control box offers several flush cycles feeding in water and flushing it out.

Today we had a glitch where the output motor ran on longer then it should no issues as it can pump dry

But the nasty thought struck me that were this the input pump ,gallons of seawater would be pumped into the boat !

Not nice at all.

Any idea of any fsilsafes I could add. I’m redoing the control electronics soon anyway and will build it some self checks etc. But short of remembering to switch the breaker off , I can’t think of some safety overrides.

What if any are people’s experiences or suggestions. Maybe a presence sensor interlock would be useful

[ItDepends]

Originally Posted by goboatingnow

As a result of my Jabsco issues I recently replaced it with a electric conversion unit from osculatii , it has two seperately controlled pumps one seawater into the bowl and another pump to holding tank.

The attached control box offers several flush cycles feeding in water and flushing it out.

Today we had a glitch where the output motor ran on longer then it should no issues as it can pump dry

But the nasty thought struck me that were this the input pump ,gallons of seawater would be pumped into the boat !

Not nice at all.

Any idea of any fsilsafes I could add. I’m redoing the control electronics soon anyway and will build it some self checks etc. But short of remembering to switch the breaker off , I can’t think of some safety overrides.

What if any are people’s experiences or suggestions. Maybe a presence sensor interlock would be useful

I am not sure I understand the issue?

Every electric head I have ever seen only runs pumps when someone's finger is on the switch. Both the intake and outflow pumps only run when commanded to do so by a finger on a button.

How are yours different that that?

[goboatingnow]

Originally Posted by ItDepends

I am not sure I understand the issue?



Every electric head I have ever seen only runs pumps when someone's finger is on the switch. Both the intake and outflow pumps only run when commanded to do so by a finger on a button.



How are yours different that that?

This controller has a timed system , short time button , input runs for 2 secs , 5 secs later ouput flush. The. This repeats once more.

Long button press , input runs , followed by output. Then input fills and followed by another flush

I agree with you this controller is a worry. I plan to replace it. With a in and out button

But maybe a “ auto “ cycle is also useful

In all cases I’d like to protect the input from running as to flood the boat.

[Franziska]

Sorry but this makes me laugh and is not meant mean in any way.

Love it when one needs to become a rocket scientist to flush a toilet.
That will be fun when you have guests.
Can I use your toilet please, yes but read this book first :-)

[glenn.225]

That will be fun when you have guests.
Can I use your toilet please, yes but read this book first :-)[/QUOTE]

Isn't that the case with all marine toilets!!!
Every guest I've every had aboard I had to explain how the toilet works.

[ItDepends]

Originally Posted by goboatingnow

This controller has a timed system , short time button , input runs for 2 secs , 5 secs later ouput flush. The. This repeats once more.

Long button press , input runs , followed by output. Then input fills and followed by another flush

I agree with you this controller is a worry. I plan to replace it. With a in and out button

But maybe a “ auto “ cycle is also useful

In all cases I’d like to protect the input from running as to flood the boat.

You are kidding right? I can see why you thought this would be WAY less trouble than the Jabsco manual toilet (NOT!)

If it doesn't have the kind of built in "failsafes" you want, you bought the wrong system. Maybe they could be added, but that would require detailed knowledge of how the whole thing works.

To help with your redesign of the system, the standard marine electric toilet has three modes. FILL: Add water only; EMPTY: Empty toilet only; FLUSH: Run both fill and empty pumps. Each of those is controlled by a simple momentary-on switch. With a couple of timer relays you COULD add an automatic mode, but then you are right back to where you started, trusting your boat to a timer relay.

[sv_pelagia]

We had a Jabsco electric toilet when we purchased Pelagia years ago.

HATED IT!
Noisy (neighbours could hear it...). Put way too much water into holding tank.

Ripped it out and replaced with Jabsco manual. Much much happier. Twice as long on the holding tank.

[goboatingnow]

Originally Posted by sv_pelagia

We had a Jabsco electric toilet when we purchased Pelagia years ago.

HATED IT!
Noisy (neighbours could hear it...). Put way too much water into holding tank.

Ripped it out and replaced with Jabsco manual. Much much happier. Twice as long on the holding tank.

Thanks. Yes I think I’ll change the controls to two simple momentary switches in & out, I was going to build a controller but as you say I don’t like electronics controlling an infill pump.

SWMBO adores the new unit. So it’s staying , neighbours couldn’t give a damn. Noise is low and yes enthusiastic overuse pumps a lot of water into the holding tank but here in Greece that’s not an issue.

[Dockhead]

Originally Posted by Franziska

Sorry but this makes me laugh and is not meant mean in any way.

Love it when one needs to become a rocket scientist to flush a toilet.
That will be fun when you have guests.
Can I use your toilet please, yes but read this book first :-)

[goboatingnow]

Well it’s not currently complex. You either press a “ long cycle button “ or a “ short cycle button “ the controller does the rest.

[Tin Tin]

You can insert a timer relay (cube type from Hella) into the power supply to the unit. This can be variable, so when you activate a toilet cycle it runs through this relay. Set the relay for say 15 minutes and that is the most that it will run for.