New Toilet Installation Problem

[Aussie Ross]

Hi Everyone,

I have just had a TMC toilet installed by a shipwright. He left the electrics to be connected by me, which I have done. The toilet has never been used. However, the motor does not seem to be working properly. It is not sucking in any water. Nor does it seem as powerful as a normal TMC toilet. (Please see the video attached showing how the toilet is currently working).

https://www.youtube.com/watch?v=hnXW...ature=youtu.be

It is getting sufficient power. I checked the positive cable with a multimeter and it is getting 12.6v. I also checked both seacocks. Neither cock is blocked. I also closed both vented loops. That has make no difference to the toilet's function.

I have also attached a video on youtube, posted by someone else, of how this model of toilet normally works

https://www.youtube.com/watch?v=KPj9winhFBc

Does anyone have any suggestions. Should I get the motor replaced under warranty?

Thank you for taking the time to look at my post.

Ross

[sailorchic34]

Have you checked that the motor is not wired / running backwards. Check by swapping the + and - for a minute and give it a try.


I'll not that a, cough, Blonde once wired up her water pump backwards and it would not pump at all, till the wires were switched.

[meridian28]

Crack the inlet fitting at the toilet to make sure you don’t have an air lock

[Bruce K]

What size wire did you use? How long is the run to the batteries? Often toilet motors pull 25 to 30A on startup

[boden36]

You probably already know this, but just in case, are you checking the voltage with the motor operating? This is the important figure. Will be likely lower than the unloaded voltage.


Regards,
Richard.

[Uncle Bob]

Hi, if you have the dual flush control that TMC sell you have to run all power, pos and neg to it first then to the pump.(don't ask) The video of yours operating is not normal, sounds very much like a lethargic pump.

[Steve Bean]

All electrical connections clean and tight? A bad connection can show 12 volts but not pass enough current.

[Greg Mason]

If you put water in the bowl, does it pump out?

[Mistress Sirena]

maybe 24 volt motor ?

[Cpt Mark]

A lot of great suggestions especially Sailorchic 34's LOL.

You could call the manufacturer as well for advice.

[Mplight]

It’s important to insure that there isn’t an airlock, all toilets, whether manual or electric require a vacuum, if there’s any air in the incoming hose you want have proper operation.

[Mplight]

* d&mn spellcheck “... you WONT have...”

[inspectr]

I kept a second hand macerator pump on board for the best part of 8 years
When the original pump died I replaced it, massive PIA due to the need to remove the pan to get enough access to the pump to remove it
Why the designers of this POS could not design a side access pump rather than a rear mount hard against to the aft bulkhead beats me
Long story short the replacement pump ran clockwise but the dead pump ran the other way. Changing the polarity of the wiring did not work. When I brought the recalcitrant pump home on the workbench it was clear tat the two different pumps ran in opposite directions
Two pumps ended in the bin and I bought a new one that works perfectly
The 12V versus 24V theory has credence I think
On my experience there are definitely contra-rotating macerator WC pumps out there

[Uncle Bob]

Originally Posted by inspectr

I kept a second hand macerator pump on board for the best part of 8 years
When the original pump died I replaced it, massive PIA due to the need to remove the pan to get enough access to the pump to remove it
Why the designers of this POS could not design a side access pump rather than a rear mount hard against to the aft bulkhead beats me
Long story short the replacement pump ran clockwise but the dead pump ran the other way. Changing the polarity of the wiring did not work. When I brought the recalcitrant pump home on the workbench it was clear tat the two different pumps ran in opposite directions
Two pumps ended in the bin and I bought a new one that works perfectly
The 12V versus 24V theory has credence I think
On my experience there are definitely contra-rotating macerator WC pumps out there

For what it's worth, the regular TMC can be installed with the pump to the side. Simply unbolt the bowl from the base and install as required.

[Aussie Ross]

Thank you very much for all your suggestions everyone.