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Fuel Pre-Heaters / Re: fuel pre-heaters
« Last post by Blaine on February 03, 2024, 08:18:12 pm »
I use the heating element from a coffee maker. I regulate the temp with a PID, SSR, and a k type thermocouple. Spent maybe $30.

 It’s a shame this forum isn’t more active. I don’t do facebooks.

I'm probably going to have to pre heat my float tank.  I hear, if the temp gets below 40F, it's best to pre heat the float tank.  I haven't researched how to do it yet.  I'd like to see how you got yours wired and the parts you used.  What's a SSR?  Thanks.

  Sorry, i just saw your reply. I run my setup from a “pressure vessel” instead of the syphon method. It’s the same exact syphon nozzle, it’s just that the oil is supplied flow a pressurized tank with about 12psi and the fire runs continuously. i have a large drafty garage so that isn’t an issue.
I can however dial it back for lower heat output.

I use 2 PID controllers. One to regulate the oil preheater, and the other maintains a set burn temperature. There is a type k thermocouple attached to the preheater element (coffee maker element) to sense the temperature of the oil flowing through the element. The thermocouple provides feedback to the PID. The PID outputs a low voltage signal to the SSR and the SSR outputs 110v to the heating element when the PID commands it on.

 The other PID monitors flue temperature from a thermocouple in the stove pipe about 2 feet from the stove.  There are 2 valves plumbed in parallel in the oil line leading to the nozzle. One valve is adjusted to allow just enough oil through to maintain a small flame, sort of like a pilot setting. The other valve also has a solenoid plumbed in line with it. This solenoid is controlled by the fire temperature PID to allow more oil through to the nozzle until the flue temp set by the PID is reached. So when it’s up to temperature, this solenoid cycles on and off roughly every few seconds to maintain the temperature within +/- 10°… of the 1360°F of the flue temp.

The PID controllers are very inexpensive and have transformed my setup from a unpredictable, unsafe fire hazard into i safe, reliable, much cleaner burning source of free heat, and a lot of it.

Just found this amazing item on AliExpress. Check it out! $13.24 | Digital LCD PID REX-C100 Temperature Controller Set + K Thermocouple + Max.40A SSR Tools
https://a.aliexpress.com/_mKtFzyW

I’ve seen hot water heater elements used to heat the tank in your type of setup, controlled by a PID. Years ago in my early experience with waste oil heat gravity drip feed method, i was using a crock pot as a preheater, but it took forever to warm up, and it gave off oil smell fumes. And just about the time, i’d have to fill it back up with cold oil. This coffee maker element is up to temp in less than a minute and it only heats as needed. It cycles on and off at around a 30% duty cycle, maybe a little more if it’s really cold out.

 Here’s a YouTube video of my setup in its most recent configuration. I used to use a propane tank and get about 6 hours burn time to a tank full, but I’ve upped the tank to a water tank that easily holds 15 gallons of oil and lasts for over 20 hours between fillings. I used to use a bunch of 1/4 turn ball valves for the air and oil circuits, but most have been replaced with solenoids with the plans to some day automate everything with an auduino with the flick of a switch.

 I’d probably reply faster to comments left on YouTube than this forum if you have any questions.
https://youtu.be/WoFPJMEt0yU?si=pT89pcTbGd6cNzeV






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Fuel Pre-Heaters / Re: fuel pre-heaters
« Last post by Russ on January 28, 2024, 10:47:31 am »
I didn't use a float tank for very long and it was warm enough that I didn't need a heater so I don't have any good ideas to share.  After dealing with the troubles I had with my tank, I decided to build a metering pump.  An SSR is a solid state relay.  I would bet that they use the relay to turn the heating element on and off to keep the tank warm somehow.  Sorry I'm not more help with that.
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Fuel Pre-Heaters / Re: fuel pre-heaters
« Last post by coldblooded on January 27, 2024, 10:44:01 am »
I use the heating element from a coffee maker. I regulate the temp with a PID, SSR, and a k type thermocouple. Spent maybe $30.

 It’s a shame this forum isn’t more active. I don’t do facebooks.

I'm probably going to have to pre heat my float tank.  I hear, if the temp gets below 40F, it's best to pre heat the float tank.  I haven't researched how to do it yet.  I'd like to see how you got yours wired and the parts you used.  What's a SSR?  Thanks.
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Waste Motor Oil / Re: question about a waste oil burner
« Last post by Russ on January 26, 2024, 09:09:52 pm »
I dont remember exactly.  I think it might have actually went out if I didn't keep the spark going.  Or it wouldn't burn cleanly. 
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Waste Motor Oil / Re: question about a waste oil burner
« Last post by coldblooded on January 26, 2024, 08:58:32 am »
Good to hear you got it to keep running.  You will have to post back and let us know how it works when turning off the spark. I tried it once but didnt have very good luck so mine is on all of the time while the burner is on.

I'll try to let you know how mine works with the spark turning off.  Mine turns off after about 25 seconds.  What kind of problems were you having before you kept the spark on all of the time while the burner is on?  Thanks.
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Waste Motor Oil / Re: question about a waste oil burner
« Last post by Russ on January 25, 2024, 11:24:52 pm »
Good to hear you got it to keep running.  You will have to post back and let us know how it works when turning off the spark. I tried it once but didnt have very good luck so mine is on all of the time while the burner is on.
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Waste Motor Oil / Re: question about a waste oil burner
« Last post by coldblooded on January 25, 2024, 01:51:21 pm »
Here's the Thomas 2660 vacuum pump that I use for the compressed air.
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Waste Motor Oil / Re: question about a waste oil burner
« Last post by coldblooded on January 25, 2024, 01:48:43 pm »
I finally got the burner to light and stay burning.  Using the motor wire to run the air solenoid won't work. If you use the motor wire to run the air solenoid, it will light and the eye will see flame before the 15 second pre purge, and the system will shut down. You have to use the VALVE TERMINALS to turn on the air solenoid. I don't know what the 15 second pre purge (associated with the valve terminals) is designed to do, but you have to wait 15 seconds before you make a flame, or else the system will shut down. I don't use a air solenoid. I have a on board air compressor (a Thomas 2660 vacuum pump) without a tank that I'll just turn on and off as needed (see picture). I'll go from the valve terminals to a relay to the air compressor.  I've got it wired so the ignitor does NOT stay arcing all the time.  Thanks Russ, for all your input.
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Waste Motor Oil / Re: question about a waste oil burner
« Last post by coldblooded on January 24, 2024, 08:59:29 pm »
Everything looks blank in the pictures.  Do you have any lights when it is lighting or after it quits?

Sorry about the pictures.  The manual tells what all the lights do. But I got some more info from CK.

CK said to hook it up this way:  "limit gets 110v, L2 gets neutral. Solenoids go on the valve terminal. Motor terminals powers the motor AND ignition transformer. THE NOZZLE CANNOT SEE AIR PRESSURE UNTIL AFTER THE 15 SECOND PRE PURGE".

So the valve terminals are 110V, but like you said, will this supply enough current to run the vacuum pump?  And, if I hook it up the way he said, the ignitor will always be sparking when the blower motor is running, right?  I think he's saying, if you use the valve terminals to turn your air on, there will be a 15 second delay before the oil ignites, and that's what you want.  If the oil ignites before the 15 seconds, the burner shuts down, and that is what I have been experiencing.  I was plugging my vacuum pump in before the 15 second delay, and that's what caused it to shut down.  At least that's what I get out of what CK said.  What do you think?  Thanks.
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Waste Motor Oil / Re: question about a waste oil burner
« Last post by Russ on January 24, 2024, 08:10:53 pm »
Everything looks blank in the pictures.  Do you have any lights when it is lighting or after it quits?
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