Two questions, P-J. One, on the e-stop, it looks as though the button cuts the connection between the ground and the hot line. I'm confused because it looks like the hot line branches before the e-stop, which to my minimal electrical skills appears that the hot won't be broken by pressing the button.
Second, are the switches controlling the Honeywell valves three position switches so the valve can be fired manually?
I hope I don't sound ungrateful asking these questions. I couldn't be more appreciative of your efforts.
Please allow me to explain
MY design for the E-Stop method and circuit that is illustrated in the diagram (And most every diagram that I have drawn).
The switch is not in place to turn off a power line. Please read on:
The first issue is: I strongly recommend that each and every brew build be
GFCI protected. I feel that this is critical for personal protection when dealing with power in wet areas. The diagram states "From GFCI protected outlet".
Now with that said: The E-Stop is a normally open push button switch that is set up with 2 - 1K ohm resistors in series. It is set to provide a small leakage current to
ground and thus tripping the GFCI circuit breaker stopping ALL power to the brewery controller and the brewery.
This is a very serious safety issue and protection method that I feel must be in place.
I most certainly hope you understand what I am saying & I appreciate your asking
VERY much.
Next: "switches controlling the Honeywell valves" are on/off 2 pole single throw switches with 2 N/O contacts. (
Auber Instruments SW1 as stated in the diagram.) The PIDS Auberins
SYL-2342 are relay out PIDS that operate very much the same as their
SYL-2352 BUT the
SYL-2352 has SSR control output. Note These Auber Instrument PIDS have a feature that allows control over the percent of power being delivered to the heating element. This is the base reason that I Always recommend the SYL 2342 for gas fired breweries as you can obtain absolute control over your brew process. If you need to shut one or the other off you have that option built into the diagram plan.
I certainly hope all of this makes sense and if you have additional questions
PLEASE feel free to ask.
Wishing you my very best.
P-J