@Baker Steve yeah I'm down to partially redo my circuit. But from studying similar machines, the engineers usually use a contactor to switch on the 220VAC. And I'd still prefer to use my logic level MOSFET since it's already in a custom PCB. I'm not sure the MOSFET is beefy enough to directly drive my contactor relay coil (4W consumption and it stays on for long time) so I thought there should be something in between..

Your little MOSFET will be perfectly OK switching the big relay.
Relay takes 24V/290ohms = 82mA.
Rds(on) = 1.9 ohms worst case.
Power dissipation is I squared R = 13mW, and it will cope with 200mW.
An intermediate relay would just add extra noise to the 24V supply.
. . .you could switch the optotriac with the MOSFET (although you don’t need to)

 

Here’s the triac/contactor circuit. You won’t need parts rated at 600V like we do this side of the Atlantic!
I remember having some very nice IPA when I was in Boulder on my only visit so far to the USA.
Here’s a link to my local brewery:
https://www.bateman.co.uk/

 

Hats off to Ian! While reading those posts, I was overwhelmed by the (mis)information. I started to reply, but there was so much!

 

Thanks @Ian0 you are a wizard! I'd seriously mail ya some beer if you lived in the states. Always interesting to hear about breweries in the UK, so much history, unlike most US breweries.

 

Thanks @Ian0 you are a wizard! I'd seriously mail ya some beer if you lived in the states. Always interesting to hear about breweries in the UK, so much history, unlike most US breweries.

Don't do that! - Her Majesty's Customs and Excise will demand 20% of the value of the beer PLUS the shipping costs before they would let me have it.
If I'm ever in Boulder again (University of Boulder is my wife's alma mater) or in Denver to see my brother-in-law I'll claim my pint! (or, as we call it over here, four-fifths of a pint)