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Thread: R22 Conversion to M099?
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05-16-2021 06:20 PM #11
Re: R22 Conversion to M099?
"A smooth sea never made a skillful sailor"
Rob Waldrop
M/V Pau Hana
Ft Myers FL
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Re: R22 Conversion to M099?
I notice, nowhere is mentioned R417a. The next replacement for R22 without oil change.
It was common to purchase R417a compressors or condensing stations, reclaim the R417a and charge all with R22.
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Re: R22 Conversion to M099?
Somethings are amazingly tough. I checked my two OEM Cruisair units this week. In the six years I’ve owned Aslan, I’ve never had issues with them. Thought the fwd cabin unit might need something, but it’s rarely used. It had about 40 psi on suction side, but still putting out 58 degree air. I bumped it up to 55 psi and it’s at 50 F with good head. The other oldie was on 50 psi and cooling well. The charts called for 60 + psi, but no way I’m going that high on a coolish day. Not too bad for 38 year old heat pumps.
Semper Siesta
Robert Clarkson
ASLAN, 1983 55C #343
Charleston, SC
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Re: R22 Conversion to M099?
Just use propane it’s cheap easy to get and you can fins the leaks wit a match
"DON'T BELIEVE ANYTHING YOU READ OR HEAR AND ONLY HALF OF WHAT YOU SEE" - BEN FRANKLIN
Endless Summer
1967 50c 12/71n DDA 525hp
ex Miss Betsy
owners:
Howard P. Miller 1967-1974
Richard F Hull 1974-1976
Robert J. & R.Scott Smith 1976-present
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05-18-2021 11:04 AM #15
Re: R22 Conversion to M099?
R-22 is not that hard to come by, as least locally. I was able to buy a new, in the sealed box, 30 lb cylinder about 1 year ago for just over $300 from a private individual (yah craigslist!). I didn't even have to meet them in an ally behind an old abandoned warehouse or anything. That should be enough for my DIY air conditioner maintenance until my old CruiseAire units turn to rust.
"The only thing that always works on an old boat is the owner" - Some Wise Guy
1976 46' Convertible
Bayou Chico
Pensacola, Florida
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05-18-2021 11:29 AM #16
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05-18-2021 11:29 AM #17Senior Member
- Join Date
- Jul 2013
- Posts
- 1,188
Re: R22 Conversion to M099?
I checked into this when i had some compressors go out. I found it cheaper just to source r22 locally or on ebay. Way cheaper than you quoted.
Someday, once all the other projects are done (yeah right lol) I want to go with a chiller type system, should save considerable space in an already cramped engine/equipment space.SOUTHPAWS
1986 52C Hull #391 8v92TI
PENSACOLA, FL
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07-13-2021 09:56 AM #18Registered Member
- Join Date
- May 2019
- Posts
- 34
Re: R22 Conversion to M099?
I have 7 of the older rotary control ac units. They are R22. We recently had a compressor short to ground. I was able to order a new r22 compressor from PTAC Solutions for about $300.
We charged with R407-c instead of R22. All same hardware and is one of the coldest acs on the boat now. My AC guy just did a compressor swap instead of trying to replace the entire system. The evaps on these old girls seem bullet proof!
We did not try the M99 since our AC guy said the 407 is better formulated for these acs. Super happy and my wallet is happy too!Dan Zucker
Lady Jean
61 Hatteras MY 1980
Dunedin, FL