OK John here are more translations:
STOP MISQUOTING ME…….
“Yet the EPR itself could be used for that as matter of fact one of the reasons it is used on multi evap systems the epr's are put on the evaps that have higher operating temps then the evap with the lowest operating temp so that these ones do not ice up.”
That was my quote you responded about an epr with a dbv not an epr by itself…
But what you are saying is:
“ It is not possible to use an EPR valve by itself on this system to maintain a temperature above icing and have a suction pressure within mfr’s tolerance for the compressor.”
-----indirect Dalton Quote..
I do not think I agree with this statement but ok.
Now for the baja buggy:
“First and foremost, the lowest possible evaporative coil temperature is not, I repeat, is not what we are after. We are simply after a way of preventing the evaporative coil surface from beginning to freeze in the first place…..and nothing more.”
I respectfully exclude myself from this we……
In addition to your above recommendations: If you installed a DBV, like we both have agreed to use, and set it properly (53 PSIG), then installed the EPR, and set it to the above setting that you recommend (43 PSIG), then the EPR would never close, and hence be totally useless.
This was an error the dbv pressure should be lower than the epr…
However the point is moot as in your precious indirect quote you said it was impossible to return a suction pressure within mfr standards of a high temp compressor .
Well since that would be the case and the condensor would be opened up anyway to install the bypass valve might as well changeout the compressor while I am there and if I am changing the compressor might as well retrofit it to a 404a system, add in a receiver, accumulator, rip the air handler go with 2 split 1.5 ton dual fan refrigeration coils with bypass valves on the evaps and maintain the evaps at 24 psig which would gives us roughly a –10 degree evap temp.
Now this could be checkmate …. At this butt kickin cold temp that this system would achieve ---hell with Lieberts---an electric defrost with a timer with early termination the room would still be well within acceptable temperatures but I would stagger the defrost cycles of the evaps anyway…
Now I know what you are thinking humidity could be dangerously low at that temp which present a static danger …However florida being roughly an average of 63%rh I figure with serverroom go in every 5 minutes to check on “stuff” this will balance out the humidity if not make up air could be added from the outside when the humidity level fell below a certain point….
I know you think this is too good be true but there is more and before the Dalron gang jumps the gun I would have the room floor ceiling walls and door completely insulated…
But need be I would be willing to change the condensor coil and fan for a larger coil and higher hp motor if it could not dissipate the heat load being produced and the pressures run too high.
And for efficiency sake I would consider a second smaller compressor as well which would be used with one evap in low load conditions and when loads were peak then the second would be used instead and a solinoid valve would open the second evap as well.
I am figuring with used/donated parts from posters and mfr’s we can do this badboy for about
$9.95 with no warranty 29.95 with 1 yr warranty and $50 with three years extended warranty.
I see the discovery channel calling me for my own show "EXTREME HVAC" OR "DESPERATE SERVERROOMS" OR
"KIDS SEE WHAT HAPPENS WHEN YOU SMOKE CRACK"
I ANXIOUSLY ANTICIPATE YOUR REPLY AND PLEASE IN THE FUTURE TRY TO RESPOND TO WHAT I ACTUALLY WRITE.
[Edited by thehumid1 on 01-25-2005 at 01:10 PM]