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Old 12-04-2010, 04:45 PM   #1
badmajon
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Default One stop shop tutorial for automated propane?

Hello all,

So I've been trying to RTFM when it comes to the subject of automated propane but I'm confused because the threads out there seem to be scattered with various people chiming in on various things and not knowing much about gas I am lost. I did gather some info from a good post by MNBugEater:

Quote:

Pilot Thermocouple - Honeywell Q340A1108
Pilot Burner - Honeywell Q314A4586
Solenoid Valve - STC 2W160-10
Pilot Safety Valve - BASO H19AL-1

My valves are 3/8". If you are using or want 1/2" the part numbers are slightly different.
I understand that:

a) The thermocouple is a thing which tells the pilot safety valve if the burner is on. If its not, the pilot safety valve shuts the gas off.
b) A solenoid valve turns gas on and off. How, I'm not sure. I'm not sure if its connected to a current which when the current is on opens the valve or what.
c) Pilot light, well, obvious.

I don't understand:
a) How this solenoid works. As I said, is there a wire leading to current, when current turns off, valve shuts?
b) How this works into my existing setup. Can it be placed between my propane cylinder and bayou burner (well, with the thermowell copper placed somewhere on the burner to check for flame) or will I need to buy a new burner?
c) How does the pilot light get fed? Some kind of splitter from my propane tank? Does it need a regulator?
d) How this physically goes together.

Can someone describe or point me towards a whole setup for newbies on how to build this. I know almost nothing about gas or propane but I'm pretty handy in general so I can probably catch on with a good tutorial.

Also is my Blue Rhino tank and Bayou burner high pressure or low pressure?
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Old 12-04-2010, 09:29 PM   #2
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http://www.homebrewtalk.com/f51/gas-...ummies-116632/
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Old 12-05-2010, 12:33 AM   #3
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Thanks for the link. Although its nice, it seems the most expensive part of the system is actually the safety valve and spark system. I'm wondering if that is necessary if one would just watch it?

Could I just use a high pressure solenoid like this:

http://www.suremarineservice.com/SV-1.aspx

And hook it right up to the temperature controller with a pilot light? I see this PID temp controller has an output option called "12 volt SSR"... is that what I would hook the solenoid into?

And how does the pilot light work? I guess a splitter?

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Old 12-05-2010, 12:45 AM   #4
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Jon,

Here is a great build that will answer quite a bit of your questions http://www.homebrewtalk.com/f51/my-n...ations-172927/

Nick

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Old 12-05-2010, 01:23 AM   #5
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Quote:
Originally Posted by badmajon View Post
I see this PID temp controller has an output option called "12 volt SSR"... is that what I would hook the solenoid into?

And how does the pilot light work? I guess a splitter?
No, the 12v output from the PID is the signal that goes to and controls the SSR which is just a fancy electronic switch. You also need a 12 volt source to operate the solenoid. The 12 volt source going to your solenoid valve will be switched on and off by the SSR which is controlled by the PID therefore controlling temperature.
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Old 12-05-2010, 02:04 AM   #6
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Quote:
Originally Posted by Sawdustguy View Post
No, the 12v output from the PID is the signal that goes to and controls the SSR which is just a fancy electronic switch. You also need a 12 volt source to operate the solenoid. The 12 volt source going to your solenoid valve will be switched on and off by the SSR which is controlled by the PID therefore controlling temperature.
Thanks for explaining that. So I need to purchase a seperate SSR for the controller, which I will plug the power source into, which I will plug the solenoid into. Or I'd just select the "10A at 120VAC" output option and stick a transformer on there to take it down to 12v dc.

Now I just have to find an SSR, or something. I will eventually figure this out... some day...

I'm just trying to do a no-frills version of the Cadillac type rigs many people have made (well, I guess its relative), there are a few good plans out there but they are just beyond my means and capabilities.
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Old 12-05-2010, 06:28 PM   #7
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Here you go. I drew this up for you this morning. The VR8200A is $50 on Ebay and you can find the Q314A for $7.00. You do not need an SSR. You will need a PID controller, 24 volt transformer and RTD (better than a thermocouple). Below is how you hook it up. It is safe because if the pilot goes out the valve will shut the gas off.

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Old 12-05-2010, 09:21 PM   #8
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Wow, thanks a lot!

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Old 01-12-2011, 05:55 PM   #9
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wow thanks for the taking the time to draw this up. Very useful.

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Old 01-12-2011, 11:35 PM   #10
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Is an ignition module necessary? I am assuming it is, but I don't see it in the diagram.

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