Hi all hope your well and business is good.

We have a large site containing around 65 systems. Unfortunately certain areas of site have been moth balled due to budget issues. Anyway this means the areas will no longer be occupied and so the aircon stood unused for a unknown period of time. My question is what's best practice can the units be isolated and left or is there a specific procedure to follow. I am aware that if the system requires a leak check under F Gas then this still has to be done. Is there anything else ? A large percentage of the systems are on R22. Cheers