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-   -   Two with One (http://www.homebrewtalk.com/f170/two-one-228531/)

Double-R 02-27-2011 07:28 PM

Two with One
 
Want to control 2, 5500w elements with "ONE" Pid.. dont know if its been covered, if so point the way.

burglar 02-27-2011 07:46 PM

Do you mean using the same PID to work both the MLT and boil kettle?

I'm curious if anyone has done a switched RTD probe input. I'd think it would increase the chance of making a mistake, but a good question.

Double-R 02-27-2011 09:34 PM

Yes, Both the way i see it 2 SSr and 2 rtd sensors , just detach rtd from HLT plug into boil kettle . The 2 SSr's would be the thing to figure out. Maybe connect both to PID???

Squeeky 02-27-2011 10:46 PM

Double-R

I'm doing just that with my setup, check out my thread. Simple eHERMS with P-J schematics. Something like that, just to lazy to link since on my phone.

P-J 02-27-2011 11:14 PM

Quote:

Originally Posted by Double-R (Post 2686906)
Want to control 2, 5500w elements with "ONE" Pid.. dont know if its been covered, if so point the way.

Squeeky's Diagram:

Auberin-wiring1-a4-4500w-30c.jpg
Auberin-wiring1-a4-5500w-30b.jpg

The temp probe stays in the HLT. Don't move it. The PID gets switched to manual mode to control the boil. BTW - you only need one SSR as the element switch is a double poll - double throw - center off switch.

Double-R 02-28-2011 12:01 AM

THANK YOUUUUUUUUUUUUU. I'am in. EVER BODY TO :rockin:

Squeeky 02-28-2011 12:04 AM

Double-R feel free to shoot me a PM if you have questions. P-J walked me through a lot so if you have questions I probably have answers. Currently awaiting a free day to build my control panel. I decided recently that I want to mount my march pump in a toolbox with the panel.

If you looking to save costs, I recommend batch sparging so you only have 1 pump. There is also the option on 2 tiers, one pump, fly sparge.

rcm_rx7 02-28-2011 12:42 AM

Is there any reason you couldn't use two thermocouples and use a switch so I would be able to see temps in both the HLT and BK?

P-J 02-28-2011 12:52 AM

Quote:

Originally Posted by rcm_rx7 (Post 2687715)
Is there any reason you couldn't use two thermocouples and use a switch so I would be able to see temps in both the HLT and BK?

You could do that - But - why bother with the boil kettle temp? Water simmer boils at 212F & a very vigirous boil is also at 212F.

rcm_rx7 02-28-2011 01:33 AM

Quote:

Originally Posted by P-J
You could do that - But - why bother with the boil kettle temp? Water simmer boils at 212F & a very vigirous boil is also at 212F.

Yeah that's true. My reason for wanting it is only to see how close to boil I'm getting, and maybe to monitor temps during cooling and whirlpool. Might now be worth the hassle, and extra hole in the Kettle.


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