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Home Brew Forums > Home Brewing Beer > DIY Projects > Brew Stands > Standing Pilot for Automated MLT
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Old 04-24-2012, 12:33 AM   #1
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Default Standing Pilot for Automated MLT

I've been slowly upgrading my single-tier, 3-burner brewstand since I got it last year and now I'm stumped...
I recently upgraded my mash burner with a solenoid valve (PID controlled) and a standing pilot (Honeywell Q314A). I'm running LP gas with a 40psi regulator. I have individual 1/4-turn valves controlling flow to both the solenoid and the pilot... trouble is that when I get the pilot to light, it looks and sounds like a blowtorch. Anyone have any suggestions for a 1/2" gas needle valve? Is there something else in the system I'm not considering?
Thanks in advance.
Mike

Shots of my system:
Here's the first attempt at a standing pilot... just used a piece of 1/4" copper and pinched the end... got it to light, but it wasn't a very constant flame...


Here's a shot, top down, with the Honeywell pilot installed:

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Old 04-24-2012, 01:02 AM   #2
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my guess is that pilot light is designed for an 11" wc (about 1/2 psi) low pressure system. This is really not safe. Best way to automate this is with a honeywell 8200 valve on low pressure. The pilot is part of the valve and wont open should the pilot go out. your solenoid has no safety and could be deadly.

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Old 04-24-2012, 01:09 AM   #3
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Short cuts in gas plumbing = short cuts to death...

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Old 04-24-2012, 01:38 PM   #4
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I think a high-voltage spark ignition with a flame detection safety would be a better choice.

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Old 04-24-2012, 09:30 PM   #5
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Quote:
Originally Posted by Junkster View Post
I think a high-voltage spark ignition with a flame detection safety would be a better choice.
Junkster:
Care to share a link to what you have in mind here? The 'search' function was not my friend on this!

Also - I appreciate all the safety concerns expressed by the responders, but I don't know who in their right mind would leave their brewstand unattended for more than a minute or two while running...

I did find this gas needle valve when reading a post that came up in the 'similar threads' section:
http://www.etundra.com/3_16__Pilot_A...ve-P26772.html.
Looks like it may be a winner...
Anyone have experience/opinions on this valve?

Thanks!
Mike
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Old 04-24-2012, 09:33 PM   #6
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I believe this thread describes the setup junkster was refering to:

http://www.homebrewtalk.com/f51/gas-...ummies-116632/

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Old 04-24-2012, 09:41 PM   #7
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Quote:
Originally Posted by mydementia View Post
Junkster:
Also - I appreciate all the safety concerns expressed by the responders, but I don't know who in their right mind would leave their brewstand unattended for more than a minute or two while running...
Mike
The challenge is more than lack of attendance. Some burners are very quiet and some burner flames (based on stand design) are not readily visible.

We moved to a 'Smart Valve' unit due to it's compact design and lack of need for a divorced control module. The ignition is hot surface and only switched 24VAC is required to run the system.

I know, there are plenty out there that believe this is overkill. But we are building stands that have to work for customers and safety/liability must be addressed.
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Old 04-24-2012, 09:50 PM   #8
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Shoot, I sure wish I'd have known about those smart valves before I bought the valves with the separate control unit. Would've been a much "cleaner" looking install. Oh well.

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Old 04-24-2012, 10:09 PM   #9
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Mock up of those Smart Valves

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Old 04-24-2012, 11:21 PM   #10
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My set up is very similar except I use NG. I beleive its all 1/4" So it looks like you need to get rid of the ball valve feeding the pilot and put that reducing bushing in it's place. Then http://www.homedepot.com/webapp/cata...gry=SEARCH+ALL and finish 1/4'' tubing to pilot.
It's not as safe as the auto pilots but like you said, it's not meant to be run unattended!

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