built-in time delay failure point, easier to produce the PC board, justifies a service call later to sell you replacement parts.Years ago there would have been a set of leads out to a contactor or outboard relay. Glad to see you beefed it up-at least you'll know where to look if there is a failure. Is that a horiz discharge unit or downducted thru the roof? Gas pack heat too-nice!! I'd take those red leads all the way to the next terminal,not the copper trace,but thats just me.At least you got it up and running.
I have two 5T ex-military package units ready to go for my next shop,they were brand new surplus,I drove to Ohio to pick them up,man they are built nice,no plastic,no corners cut when they designed them, all 3ph with belt drive blowers that really pump it out..I was planning on putting them on a back room roof very similar to what you have done here in your photo..maybe make a mezzanine for them to sit on and make filter service easier
