PID and SSR in Separate Enclosures

[OneInTheHand]

I was thinking of separating the SSR w/Heatsink from the PID. Have them in separate enclosures and have the PID served from a 120v source and the SSR direct from a 240v - 30A GFCI breaker.

Logic is that from subpanel the 240v breaker is only serving the SSR and Heat Coil. From same subpanel 120v circuits can service 120v stuff (pump/pid/light/exhaut fan, ferment chamber, etc.)

Of course the pid will still connect to ssr via the communication wires.

Any safety or technical reason not to do this?

Thanks!
George

 

[day_trippr]

There shouldn't be any safety reason against this as long as each enclosure meets safety requirements on its own.
And if the only things passing from one to the other are the SSR control signals, as long as there's no DC offset from one enclosure to the other there shouldn't be any technical issues, either...

Cheers!

 

[doug293cz]

You should have a means to mechanically disconnect the 240V mains from the SSR and downstream circuits. SSR's do not isolate the mains from the load, they just switch from full current to very low current, but voltage is still available. You can use something as simple as a Leviton 3032 (or equivalent) DPST switch, or a suitably rated contactor plus switch.

Personally, I recommend having all of the control circuitry inside one enclosure.

Brew on

 

[OneInTheHand]

@doug293cz Thank you.

Yes, I was thinking the exact same thing. $12 at big orange box store. Right now half the cost seems to be everything upstream from the actual brewing rig (GFCI breaker, wire/cable to get to the brew location, 240 plugs/receptacles, etc.) Once at the brewing rig, basic switches, receptacles, wiring, are relatively cheap. I'm electrically inclined, and I have extra components from various projects (12/2 and 14/2 wiring, BR breakers from a main panel upgrade, 15A receptacles, boxes, exhaust fan, lights, etc.).

 

[golfindia]

Arduino it and control the SSR with blue tooth.

There are also some wireless Christmas tree light controllers that might also work.