My little 16'x9'x7' Oven Build.

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13clicks
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My little 16'x9'x7' Oven Build.

Post by 13clicks » Wed Apr 10, 2019 3:47 pm

I am in deep... this oven is coming along nice but its a lot of work. Starting with the main frame I am using steel studs and galvanized sheet metal for the inside walls and door. I will be using home siding for the exterior. I have been gifted a bunch of fire proof insulation for the guts.

I have also obtained a 225,000BTU heater used for greenhouses... and a PID unit for the control thermostat. I have wired the PID and it is working great on the test. I have not tried to fire the heater with the PID yet. The heater has a startup cycle every time it fires so I have to figure this out with the PID... I am nervous that the PID will not work due to this startup cycle. Has anyone been through this issue? Basically the heater is not a continuous ignition unit.

The other thing is that this heater blows a TON of air out when its on. I am going to have to build a manifold and defuser to control the tornado so it doesn't blow the powder off.

Anyone want to chime in and give me any pointers?

blake
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duke46
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Re: My little 16'x9'x7' Oven Build.

Post by duke46 » Thu Apr 11, 2019 8:53 am

I think I know what type of heater you have but if it is not an auto fire (continuous ignition unit0. Then how do you fire it up? The PID will fire up the type units that all of us use.
Post a link to the type you have.
All I have said is said just for meanness so I don't have to argue with anyone!

http://www.pcitdad.com" onclick="window.open(this.href);return false;

13clicks
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Joined: Sat Feb 23, 2019 4:31 pm
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Re: My little 16'x9'x7' Oven Build.

Post by 13clicks » Thu Apr 11, 2019 2:43 pm

duke46 wrote:
Thu Apr 11, 2019 8:53 am
I think I know what type of heater you have but if it is not an auto fire (continuous ignition unit0. Then how do you fire it up? The PID will fire up the type units that all of us use.
Post a link to the type you have.
HIRED HAND® 225,000 BTU HEATER - LP is the name. I got it free and would like to use it BUT if it doesn't work out I'm ok with it. If there is a thermostat I CAN use with this unit to obtain 400deg let me know. Im guessing its not going to work. I will just have to go with a tube style heater in stead like I originally planned.

thanks for the help!

blake

13clicks
Posts: 11
Joined: Sat Feb 23, 2019 4:31 pm
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Re: My little 16'x9'x7' Oven Build.

Post by 13clicks » Thu Apr 11, 2019 3:21 pm

Wellllllll, I just got off the phone with TechSupport and was told that this heater would shut off around 300deg. Bummer...

Anyway, can you please link me to a recommended heater I could use with my PID controller? Tube Heater? There are soon many options my head is spinning... I just want the best one for the application.

I did a BTU calculation and its recommending 80,000 to 100,000BTU.

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duke46
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Re: My little 16'x9'x7' Oven Build.

Post by duke46 » Fri Apr 12, 2019 10:34 am

When doing the BTU calculation then it is best to figure the less insulation so you make sure you buy a unit that will heat up the fastest. A factory well made one may take less BTU's but home built ones will most likely take more.
I hope that the PID you have is a relay one and if so then it will operate the torpedo propane units very easy.
I was trying to find a larger one than this and the one I found was not an auto fire sad to say.
This one should do the job and is a good price I think and you can set it as to your needs.
https://www.tractorsupply.com/tsc/produ ... 25-000-btu

This is a larger one and it will work fine and if I were you then I would get this size.
https://www.amazon.com/Mr-Heater-F27140 ... 8JQW1Q626D

Here is the larger one and some guys do use this size but you do need two tanks or a large tank.
https://www.amazon.com/Mr-Heater-MH400F ... B000AGVB34
I found what I was looking for that one of our guys that built a large oven and he did have to go with a large unit. And I am thinking you will also.
http://powder365.com/forum/viewtopic.php?t=7035

You do have to straight wire the built in thermostats when using them and then the PID along with your TC in your oven and then it will cut off and on as needed.
All I have said is said just for meanness so I don't have to argue with anyone!

http://www.pcitdad.com" onclick="window.open(this.href);return false;

13clicks
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Re: My little 16'x9'x7' Oven Build.

Post by 13clicks » Fri Apr 12, 2019 1:26 pm

Oh Awesome!!!

I just found a similar 400BTU on craigslist locally. I'm picking it up tomorrow. Thank you very much for the links!!!!

Now onto another issue... what valve is everyone using to hook up to the PIDs? I have a PID that is already wired up and I have tested ready to use.

Here is a link to one I THINK will work. https://www.amazon.com/YXQ-Electric-Sol ... 5669003661

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duke46
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Re: My little 16'x9'x7' Oven Build.

Post by duke46 » Sat Apr 13, 2019 4:33 pm

There was or is a company on eBay that most guys bought them from. The one you found might be the same type and looks like one that was used that I have a picture of but not sure if I can post a picture any longer or at least the way I have been doing on here for years but I will try?

This is one like they were using and it works with gas
https://www.ebay.com/itm/1-4-Electric-S ... 0504508581

All the valve does is cut off the gas but if your heater is not an auto fire then you would have to manual fire it up again,
Gas valve addition.jpg
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All I have said is said just for meanness so I don't have to argue with anyone!

http://www.pcitdad.com" onclick="window.open(this.href);return false;

13clicks
Posts: 11
Joined: Sat Feb 23, 2019 4:31 pm
My Location: 95975

Re: My little 16'x9'x7' Oven Build.

Post by 13clicks » Mon Apr 15, 2019 3:40 pm

I made the order for this valve... Thank you for all your help! This has really helped me out through my build.

blake

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