I can't imagine that V-LFT takes any longer to cure/dry than does regular Versabond, Chad.
FWIW, I did my entire bathroom floor with Versabond; Ditra (Heat) to plywood, tile (12X24's) to Ditra. I stayed off any newly installed tiles for 24 hours, then only foot/knee traffic for another day. Grouting it quickly wasn't an issue for me (as I'm embarrassingly slow) But I'd want to let the mortar cure for at least two days before grouting.
Inna kitchen, where I imagine you'll be moving appliances about, I'd wanna wait a week after grouting before rolling your Sub Zero across the new floor. And even then I'd probably want to lay down some masonite panels to protect the floor.
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Dan
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If I recall correctly my memory is excellent, but my ability to access it is intermittent.
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