407c conversion? - Residential HVAC Forum - HVACSite

407c conversion?

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Old 05-08-2018, 06:02 PM   #1
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diyer91's Avatar
Trade: hvac
Join Date: May 2018
Location: Las Vegas
Posts: 1

407c conversion?

Hey guys, new member here. It's been awhile since I've worked on anything hvac related. This site has been a huge help so thank you.

Now I have a unit that runs R22,It had a leak last summer and the repair tech said he could not locate the leak and refilled it with R22 and it lasted all summer until I shut it off for the season.

Its May now and I go to turn it on and its blowing hot air. I called a tech and he confirmed it was low/empty of refrigerant and tried selling me on a new unit because he did not carry (nor have knowledge of) an alternative to the now expensive R22. I refused because my unit still works well and decided to give it a go myself

So with all the research I have done, these are my plans..

Purchase 407C
Purchase A/C leak Sealant
Purchase POE Oil

I plan on vacuuming the system, then pumping out roughly 15-20% of the mineral oil and replacing with POE Oil, Recharge the system with the 407C and put a can of A/C leak sealant and hope all goes well.

If anyone can give me some advice and/or tips I would greatly appreciate it

P.S. I have a 5 ton unit, any ideas on any good brands of leak sealant.

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