[Gmcnet] Duracool compatibility

[Emery Stora]

Gary - I have seen people add Duracool (HC12a) to an existing system  
that already had R12 or R134a in it.  The Duracool site says that it  
will do no harm.  However, since the Duracool provides a much lower  
head pressure on the compressor and is more efficient in cooling and  
at a relatively low cost, it makes much more sense to take out the  
remaining R12 or R2134a and fill with Duracool.  If your system still  
have refrigerant in it and has not had any air or moisture ingested  
then you don't have to draw a vacuum.  You can bleed off the existing  
refrigerant from the low pressure valve and fille with the Duracool.


On Aug 8, 2008, at 9:27 PM, Gary Worobec wrote:

> I'm sure this question has been asked a dozen times but I was not  
> paying
> attention.
>
> Can you add Duracool to a system that already has R-12 in it to get  
> the
> pressure up or should you evacuate all the r-12 and use straight  
> duracool?.
> (I just need a little) I understand that with Duracool you DO NOT  
> have to
> pull a vacuum?
>
> Thanks,
>
> Gary and Joanne Worobec
> Anza, CA
> 1973 23' Glacier
>
>
>
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Emery Stora
77 Kingsley
Santa Fe, NM