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Re: Thermasan Question: Chemical Toilet [message #317141 is a reply to message #317130] |
Sat, 06 May 2017 22:52 |
ree_eric
Messages: 43 Registered: February 2004 Location: Alexandria, Ontario, Cana...
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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
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Re: Thermasan Question: Chemical Toilet [message #317148 is a reply to message #317141] |
Sun, 07 May 2017 09:54 |
midlf
Messages: 2212 Registered: July 2007 Location: SE Wisc. (Palmyra)
Karma: 1
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ree_eric wrote on Sat, 06 May 2017 22:52I 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
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Re: Thermasan Question: Chemical Toilet [message #317150 is a reply to message #317141] |
Sun, 07 May 2017 11:59 |
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Matt Colie
Messages: 8547 Registered: March 2007 Location: S.E. Michigan
Karma: 7
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ree_eric wrote on Sat, 06 May 2017 23:52I 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
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Re: Thermasan Question: Chemical Toilet [message #317303 is a reply to message #317224] |
Tue, 09 May 2017 23:36 |
ree_eric
Messages: 43 Registered: February 2004 Location: Alexandria, Ontario, Cana...
Karma: 0
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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
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Re: [GMCnet] Thermasan Question: Chemical Toilet [message #326918 is a reply to message #315605] |
Fri, 08 December 2017 15:27 |
mgoodson
Messages: 1 Registered: December 2017 Location: Utah
Karma: 0
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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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