Guys,
Can across a client that wish to change centralina from R22 to R404A.What should I start with.
I thought of compressor oil change( of three ) from POE to ??? suggestions please.
Compressors are Bitzer.
Liquid line cartidge filer core.
Expansion valves are Danfoss TXE5.Liquid line entry to is flare type,but outpu to evp is brazed.Should I consider replacing only the orofice to a specified type ?
The pipes after reclaiming all the refrigerant needs to be cleaned.What sould I use as a cleaning agent ?

My problem is that this centralina feed 3 upright freezers and another three open type freezers.Client is only allowing a day,probably a public holiday to carry all,which I am seesing impossible.Any views ?