Hi guys,

I have a customer who has a walkin coldroom running on r22 with a water cooled unit. He has been quoted some huge price to repair the water chiller.

I have suggested that he would be much smarter to change to a air cooled unit, something like a lil cubigel condensing unit and modern digital controls to better control temperature using it as a pump down system.

I have had a chat with a few other engineers who suggest I can keep the Evap and change the TEV for a r404a one and should get away with that. I do know that mineral oil and synth oil don't mix.

Not sure whether I should suggest replacing the blowers to be on the safe side, but there will be an extra cost