Date: Thu, 27 Jul 2006 11:19:10 -0400
Reply-To: dhaynes@OPTONLINE.NET
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject: Re: [Syncro] Re:[Q] What is the value for the std. required R12
fill ?
In-Reply-To: <cf4df96f0607270754y70cde2f5jfbdfdb947ba7f602@mail.gmail.com>
Content-type: text/plain; charset=us-ascii
Actually, the temp marking on the pressure gauges indicate the coil, not vent temperatures.
Although they are related, depending on system operation and air speed, they are not the same.
While gauges are useful and even nescasary for diagnosing a refrigeration system, they should not be the only tool
used for filling. There are too many variables.
The proper way to fill a system, is to completely evacuate the refrigerant. If you really want to do things right,
you charge it with nitirogen and make sure it hold pressure for some period of time. Then you evacuate it, put i under vacuum, and fill it by weight with the
proper amount of refrigarent. Then you start the system and using the gauges, and thermometer, see that it is working properly.
Dennis
----- Original Message -----
From: robert shawn feller <carboncow@GMAIL.COM>
Date: Thursday, July 27, 2006 10:54 am
Subject: Re: [Syncro] Re:[Q] What is the value for the std. required R12 fill ?
> again head pressures are a function of temperature...they vary as the
> temperature does outside. if you look at the gauges of a good set
> you will
> see it is marked for vent temps at different pressures. you have
> to give a
> ambient temperature before you know 100% but 80lbs is a good
> estimate for
> R12.
>
> look at my website under AC as I posted a good chart for reviewing
> what your
> pressures are telling you and what the problem should be.
> www.carboncow.com
> when there is no sight glass and one cannot measure by weight i
> slowly add
> refrigerant until you get a good temp at the vent, the low hoses
> are cold
> and perspiring and the pressure "feels" about right. That is good
> as you can
> get. If you hear knocking the pressure is to high!
>
> www.carboncow.com
>
> On 7/27/06, rayvan5 <rayvan5@yahoo.com> wrote:
> >
> >
> > --- In Syncro@yahoogroups.com <Syncro%40yahoogroups.com>,
> "robert shawn
> > feller" <carboncow@...>
> >
> > wrote:
> > >
> > > I'm not an expert>
> > > Bob mentions that pressure is a function of ambient. The low side
> > reading
> > > for R12 according to my gauge set should be about 80LBS at
> 50degrees> at the
> > > vent. Right inline with what Bob stated.
> > Anyone know for sure what the pressure should be?
> >
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> --
> shawn feller
>
> www.carboncow.net
> www.carboncow.com
>
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