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Old 04-01-2009, 02:18 AM   #1
ApolloSpeed
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Default Gonna build an Electric Boiler...how to control?

I'm gonna get supplies to build an electric boiler this weekend.....it is wayyy to hard to boil 6.5 gallons on my stovetop. And I don't really wanna go propane. I can run an extra 240 outlet off my breakerbox... so

I think I'm gonna buy one of these 4500 or 5500 watt 240v elements
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Drill a hole into my AHB Economy 7 gallon SS brewpot, and install that badboy.


My question is, I don't really wanna spend alot of money on a high dollar temp controller. So lets rule that out.
BUT, do I need some sorta potentiometer or rheostat to control it?



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Old 04-01-2009, 02:21 AM   #2
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You will need something to control it...

I researched many different things while building mine, and could not get away from the PID and SSR combo. A rheostat for that much amperage/wattage is going to cost you.



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Old 04-01-2009, 02:36 AM   #3
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look into honeywell, they have some great burner controllers at a resonable price. If your going electric you gotta do GFI, fuses/breakers, and like apol said you gottta control it. You could try to fin an Rstat but it aint cheap. A POT on the otherhand, well for that kinda amperage is just not gonna happen on any budget (unless your an AIG exec). Look at commercial oven parts also.

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Old 04-01-2009, 02:40 AM   #4
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OH yeah, i forgot. I recommend to everybody, (Get a damn turkey fryer and use it with your stainless brewpot). I get like 12 batches out of a tank. I use a CO3(carbon monoxide) detector and have no problems. Electric is just not cost effective unless your brewing more than 10 batches a month(if you are you are a god!)

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Old 04-01-2009, 02:44 AM   #5
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There is nothing cost effective about brewing in my mind. Electric is cheaper to operate than propane... but costs you to build. I have less $$ into my rig than many do in thier gas heated rigs...

A 5500 watt rheostat, if they exist, would be hundreds of dollars and HUGE.

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Old 04-01-2009, 03:21 AM   #6
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so whats the cheapest way out for a controller or rheostat?

Can you give me a link to something?

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Old 04-01-2009, 03:26 AM   #7
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Pol,

Would it be possible to not use a controller and just let the element run at 100% if it was sized properly...just guessing here, say 3500w for a 6 - 6.5 gallon boil?

I realize this will be kind of crude and take a bit longer to reach boil.

Mike

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Old 04-01-2009, 03:27 AM   #8
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PID $45
SSR $20
Heat sink $20

$85 is about as cheap as you are going to get controlling that much power... 240VAC at 23 amps and 5500W is not a trivial ammount of power, it takes some serious equipment.

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Old 04-01-2009, 03:28 AM   #9
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Quote:
Originally Posted by wilserbrewer View Post
Pol,

Would it be possible to not use a controller and just let the element run at 100% if it was sized properly...just guessing here, say 3500w for a 6 - 6.5 gallon boil?

I realize this will be kind of crude and take a bit longer to reach boil.

Mike

3500W is sized about right for a 6.5-7.5 gallopn boil. I run my 5500W element at 3500W to maintain the boil, after I get it boiling. You CAN do it that way, crude, but doable.
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Old 04-01-2009, 03:32 AM   #10
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Thanks Pol,

While I admire your work and am a bit jealous, not all of us are cut out for such high tech rigs.



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