Re: [DML] Optimal R134a AC pressures
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Re: [DML] Optimal R134a AC pressures



I honestly have not noticed much difference. The low side is set by the 
cutout switch. I suspect (not authoritatively) that the high side may 
be 5-10% higher at a given ambient. 

Dave S

--- In dmcnews@xxxxxxxxxxxxxxx, "ksgrimsr" <knut.s.grimsrud@...> wrote:
>
> While the number of pounds of refrigerant might be handy when first 
> charging an empty system, it is not actually useful in my case where 
> I'm servicing an existing system that is partially (mostly) charged.
> 
> Does anyone actually have optimal pressure values rather than rule 
> of thumb refrigerant amounts? I guess my next step would be to run a 
> sweep of pressures and measure cooling performance to ensure I hit 
> the sweetest spot, but that's a pain.
> 
>     Knut
> 


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