Osmotic shock can kill dehydrated yeast. You need to re-animate the yeast with warm water, not even wort. Read some yeast manufactures websites. Some say this, I think wine makes use a specific liquid to re hydrate dry yeast.
I suggest making a starter with 24oz of wort. Cooled and then pitch with a dry pack of yeast, let it get going, high Kroysen. 8-12 hrs or until it has a half inch of foam. Dump it all in.
Need more details but this is my suggestion sight un-seen.
Was this all grain/extract. Mash temp, starter...
Call Beveredge equipment and ask them for help with your 630. He's studied those faucets and has helped customers with issues before. I was freaked about about people who had leaks with the new perlicks. That's why I went with these new Ventmatics. But I also put plastic inline shutoffs on all...
Look up Beveredge equipment company in Wisconsin. The valve is plastic for now, metal ones will be made in a month or two. No leaks or stickyness.
This company is the OEM for these faucets. Ask for Greg if you have any tech questions about them.
How old is the esb? Why not wash the yeast and then pitch a half cup of slurry. No starter needed. Maybe pitch the slurry into a small 500ml starter to wake it up.