Date: Thu, 2 Jun 2016 21:17:04 -0500
Reply-To: John Rodgers <jrodgers113@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: John Rodgers <jrodgers113@GMAIL.COM>
Subject: Re: AC SERVICING
In-Reply-To: <BAY405-EAS22633ECECCF080C572BA838A0590@phx.gbl>
Content-Type: text/plain; charset=UTF-8
OK. Dennis. Getting the system flushed is not a problem. Changing out the
receiver/drier not a problem. Done the before myself. Have a near new
expansion valve. Has been operated only one season, but that thing was a
bear to replace and definitely wouldn't want to do that any time in the
near future. It was brand new from Peter at VC, but please, please spare me
on that one.
I fully understand the need to flush, but are you saying stick with the
R134a? It is definitely being phased out.I'm pretty sure that R152 is going
to be it's replacement. To many things going for it.
BTW, Dust Off is "canned air" for cleaning computers. Uses difluoroethane.
Others of the same ilk use R134a as canned air and it's blowned directly
into the air! Just thought I'd mention it. Seems the EPA can't get it's
collective act together
Thanks,
John
On Jun 2, 2016 20:42, "Dennis Haynes" <d23haynes57@hotmail.com> wrote:
> R134a is currently wholesaling for around $4/pound in the bulk 30 pound
> containers. Even if you overcharge the system you are looking at around 3.3
> lbs. if you want to do things right you can replace the expansion valve and
> you should replace the receiver drier. The expansion valve is not unique
> for the Vanagon and any good AC supply can get one metered for the R134a.
>
> The most common reason for the AC to not work adequately after a retrofit
> is that there is still contaminants in the system along with using the junk
> in tap cans. Get the system cleaned including a flush to get all the old
> junk and oil out. Proper evacuation is the next important step. You need to
> pull a vacuum down to the micron range. Do this right and you will have
> good AC. At least as good as it should be.
>
> Dennis
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of John Rodgers
> Sent: Thursday, June 2, 2016 8:04 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: AC SERVICING
>
> Typo - should be r134a. Sorry, to many thumbs and not enough fingers.
> There are several toutube videos out showing servicing with Dust Off, a
> computer cleaner comprised essentially of difluoroethane, a refrigerant.
> References are made to EPA allowances for difluoroethane cas# 75-37-6 -
> which is what Dust Off is. The big thing is it is as good as R12, not toxic
> to the environment, unlike r134a it can be bled into the air. Though
> flammable it is insignicantly so, inexpensive (about $13 at Wally World for
> a 3 can package. This is what I've gleaned so far. Don't know about mixing
> the difluoroethane with residual r134a or if more PAG OIL is needed. I
> imagine there are other questions too, that need answering, but this seems
> to be aVanagon owners dream. One caveat - as I currently understand it,
> this is approved for home installation by yourself. You can't have it done
> in a shop.
>
> Here are some links.
>
> https://m.youtube.com/watch?v=O70Ww9vzjvg
>
> https://en.m.wikipedia.org/wiki/1,1-Difluoroethane
>
> This video below also includes a flame test for flammability!
>
> https://youtu.be/3wkBnhcyO3Y
>
> From what I have found so far, difluoroethane is the same as HFC152 which
> apparently has been approves and will replace r134a soon. This is in Dust
> Off.
>
> I plan to use it unless good reaslns are laid out not too!
>
> John
> On Jun 2, 2016 17:40, "Dennis Haynes" <d23haynes57@hotmail.com> wrote:
>
> > What is R135a? I know, a type, R134a. Anyway While R152a is being used
> > in newer vehicles instead of the R134a I do not know if it is approved
> > for retrofit or if it is compatible with the expansion valve and other
> > components of an R134a system. As summer is here let's do some research.
> >
> > Dennis
> >
> >
> > -----Original Message-----
> > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
> > Behalf Of John Rodgers
> > Sent: Thursday, June 2, 2016 12:17 AM
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: AC SERVICING
> >
> > Can difluroethane be safely mixed with residual r135a?
> >
> > JOHN
> >
>
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