Hi,
You'd need to check your original Mortgage contract with BoI, but it was pretty standard condition that house had to remain your PPR to keep tracker.
BoI have a tracker mover option. It's usually for people trading up / down. I'm not sure if they'd allow you to use it to remortgage a property you already own though. They add 1% to your current rate, and you keep tracker for 5 years. You'll find details on their website, but you'd need to ask if it's possible.
I'm assuming your tax position on the rental house is up to date?
Don't underestimate the cost of selling - solicitor fees and legal fees mainly, but the house might need a few little jobs done to help sell that might need some cashflow.
A bit left field, but 200k seems a lot for a renovation in Clare, unless it's a complete rebuild. Would it be cheaper to sell it, and buy a house that meets your needs?