So i just replaced a small ducted r22 unit with a r410a ducted unit and used the old piping of around 10 meters as it was to hard to replace. i didnt use any flushes, i blew it out with nitrogen for awhile and installed a bi-flow suction line filter.
I didnt realise it was such a big deal with the oils until now.
Do i need to be worried about my work? I dont want it to fail.
Should i leave it as is?
Has anyone done this and it failed?