I'm interested - How do I do this?
The key point to understand is that it will be your Pension Fund (and not you personally) who will be buying the Property. If you use a mortgage, the pension fund will be the borrower, not you and there will be no recourse to you personally.
Therefore, the first step is to set up the appropriate pension vehicle that will facilitate property acquisition. This will be a Self-Administered / Directed Pension rather than a traditional pension so instead of one of the Insurance Companies / Banks you will be using a Pensioneer Trustee Firm. These are approved by Revenue for this role and essentially they make sure you follow Revenue Pension rules. Of course they charge a fee for this (usually to the pension Fund) but no different than the Insurance Companies / Banks who do likewise.
You will need to transfer your existing pensions to your new Self-Administered / Directed Pension so that you accumulate sufficient funds to enable you to purchase your chosen property. Incidentally you are not restricted to Property, you can also invest in Deposits, Funds, ETF's etc so you actually have a much wider range of options as you are no longer restricted to the Funds offered by a particular Insurance Company / Bank.
Just as when you purchase property personally, you will be dealing with estate agents, solicitors etc when you are buying / selling. All costs will be paid by your Pension Fund and all income (rent etc) will go into your Pension Fund.