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Thread: Coldroom conversion r22 to r404a
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24-02-2014, 08:46 AM #1
Coldroom conversion r22 to r404a
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