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Re: Thermasan Question: Chemical Toilet [message #317136 is a reply to message #317130] Sat, 06 May 2017 15:31 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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John,
If you were to burn off ALL the formaldehyde, it would not be a problem. But formaldehydfe is a very powerful biocide which is why Thetford and Monogram and Veltest all chose to use it. If you have used the recommended dose in your waste tank and run that tank as far down as Theramsan will pull it, you will still have enough formaldehyde in the dumped contents to interfere with the anerobic activity of a 3000 gallon system.

As long as it is not your sewer system and you don't have to replace the drain field, I guess you don't need to worry. If you can dump it into a municipal system, (most of these are arobic) it will be diluted to the level that it can be managed.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: Thermasan Question: Chemical Toilet [message #317141 is a reply to message #317130] Sat, 06 May 2017 22:52 Go to previous messageGo to next message
ree_eric is currently offline  ree_eric   
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I have a system installed that I would also like to get working. I have new bearings for the pump. However only one connection at the level sensor is visible, was it a 2 connection with the second to ground? How did this level sensor work? Also missing the speed sensor, could a throttle position sensor work. A thermo sensor would work, anyone know of one that would work? What does the vacuum sensor close contacts for, high or low vacuum? Just about done with the braking and fuel systems now A/C and others...

Eric & Ree '74 ex-Sequoia (parts) '75 Eleganza (TB, exhaust x-over blocking plates, Manny reaction arms and discs, 3"exhaust rear muffler, aux vacuum, fuel tank sealing, rebuilt senders and new rubber, propane hot water heater.) Alexandria, Ontario, Canada
Re: Thermasan Question: Chemical Toilet [message #317148 is a reply to message #317141] Sun, 07 May 2017 09:54 Go to previous messageGo to next message
midlf is currently offline  midlf   United States
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Registered: July 2007
Location: SE Wisc. (Palmyra)
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ree_eric wrote on Sat, 06 May 2017 22:52
I have a system installed that I would also like to get working. I have new bearings for the pump. However only one connection at the level sensor is visible, was it a 2 connection with the second to ground? How did this level sensor work? Also missing the speed sensor, could a throttle position sensor work. A thermo sensor would work, anyone know of one that would work? What does the vacuum sensor close contacts for, high or low vacuum? Just about done with the braking and fuel systems now A/C and others...


There are Thermasan flyers and instruction manuals in Bdubs manuals webpages. http://www.bdub.net/manuals/

30mph is needed for the stock system to activate. The vacuum switch closes on low vacuum. ICRC (I can't recall correctly) it is either 12 or 16" of vacuum. These two sensors working together will operate the system when the exhaust temperature is high enough to do the deed on the waste stream. If you are searching the web or the forum for information on this system seach for both "thermasan" and "thermosan". ThermAsan is the correct name but it is often refered to as TherOsan.

When I went to resurrect my Thermasan system the vacuum switch and the speed sensor were both inoperable. Since these two item work together to guess at the exhaust temperature I decided to directly sense the exhaust temperature. I found I could buy a thermocouple temperature controller for about $35. With the coach speed at 30 and cruising down the road I read the temperature in the exhaust system from the controller and then set the turn on setting a bit below that. It works great. Gets rid of about 5 gallons an hour. If we are rolling every day or so there is no need to find a dump station. On longer trips the only tank concern is finding fresh water.


Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
Re: Thermasan Question: Chemical Toilet [message #317150 is a reply to message #317141] Sun, 07 May 2017 11:59 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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Senior Member
ree_eric wrote on Sat, 06 May 2017 23:52
I have a system installed that I would also like to get working. I have new bearings for the pump. However only one connection at the level sensor is visible, was it a 2 connection with the second to ground? How did this level sensor work? Also missing the speed sensor, could a throttle position sensor work. A thermo sensor would work, anyone know of one that would work? What does the vacuum sensor close contacts for, high or low vacuum? Just about done with the braking and fuel systems now A/C and others...

I'm back...

We are northbound from Bean Station and I have some time so:

The vacuum and speed sensors were a cost reduction (at that time <40ya) from the original that did have a thermocouple switch to start the pump. You can now buy a T/C controlled switch cheaper than a new speed switch. I suggest that you do this. Set it to turn on when you have been on level ground for about 3 minutes and be ready to shut the system off manually if you get slowed down. Even the T/C systems did have a speed switch.

As I recall, the vacuum switch closed below 16".

The tank level sensor was an RF switch because nothing else stayed working long enough to warranty. Even thought the pump will not be damaged by running dry, the marketing people felt that it had to be there to show owners that the system had done all it could do.

I was the last engineer on the program and if you have any other questions, I can try to answer them. Please realize taht the are old memories that I had no interest in keeping.

Matt - Northbound from Bean Station - Nearly Lexington.


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: Thermasan Question: Chemical Toilet [message #317224 is a reply to message #317141] Mon, 08 May 2017 16:46 Go to previous messageGo to next message
RoadWarrior is currently offline  RoadWarrior   United States
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I don't know how the level sensor worked, but the speed sensors are fairly easy to come by. Do an internet search for speedometer speed sensor. I have been looking for one of the controllers and level sensors, and can draw up a schematic of the whole thing once I get the parts put together.
Re: Thermasan Question: Chemical Toilet [message #317303 is a reply to message #317224] Tue, 09 May 2017 23:36 Go to previous messageGo to next message
ree_eric is currently offline  ree_eric   
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A relay is needed with this adjustable temp controlled switch. 10 unmounted Others around 40 in a small box with relay.
http://www.ebay.com/itm/DC-12v-Temp-Controller-Switch-Module-High-Temperature-K-Thermocouple-Digital-LED-/122010745757?hash=item1c68683b9d:g:sokAAOSwv 9hW5jHG
Is this the sensor, type K, I should be looking for?


Eric & Ree '74 ex-Sequoia (parts) '75 Eleganza (TB, exhaust x-over blocking plates, Manny reaction arms and discs, 3"exhaust rear muffler, aux vacuum, fuel tank sealing, rebuilt senders and new rubber, propane hot water heater.) Alexandria, Ontario, Canada
Re: [GMCnet] Thermasan Question: Chemical Toilet [message #317308 is a reply to message #317303] Wed, 10 May 2017 05:59 Go to previous messageGo to next message
mark grady is currently offline  mark grady   United States
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Registered: November 2015
Location: northern Indiana
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I think Wally's use of the cruise transducer as a speed sensor has an even
simpler option. Use the cruise light voltage as the engagement control for
the Thermasan. Once you're at speed, engaging the cruise starts the action.

Mark

On Wed, May 10, 2017 at 12:36 AM, ree.eric wrote:

> A relay is needed with this adjustable temp controlled switch. 10
> unmounted Others around 40 in a small box with relay.
>
> http://www.ebay.com/itm/DC-12v-Temp-Controller-Switch-
> Module-High-Temperature-K-Thermocouple-Digital-LED-/122010745757?hash=
> item1c68683b9d:g:sokAAOSwv9hW5jHG
> Is this the sensor, type K, I should be looking for?
> --
> Eric & Ree '74 ex-Sequoia + '75 Eleganza Alexandria, Ontario,
> Canada
>
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> GMCnet mailing list
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'77 + 78 Kingsley
Re: [GMCnet] Thermasan Question: Chemical Toilet [message #326918 is a reply to message #315605] Fri, 08 December 2017 15:27 Go to previous message
mgoodson is currently offline  mgoodson   United States
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Registered: December 2017
Location: Utah
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Junior Member
Hey! I'm just wondering it you might not still have some of the old Thermasan parts that you'd been hanging on to.
I'm trying to create a similar system, and I was wondering if you might still have anything that I could check out.
I'm especially wondering about the nozzle/spraying apparatus.

Any help is appreciated!

Matthew Goodson
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