Engine Size: 454
Refrigerant Type: R134a
Ambient Temp: 90
Pressure Low: 60
Pressure High: 235
Country of Origin: Qatar
I just finished installing a new Sanden 508 compressor and new parallel flow condenser and of course a new dryer which came with a binary switch (I got everything from Vintage Air, simply it's a partial A/C kit). In my old system with everything stock (A6 compressor) I installed a POA eliminator which has a switch connected in series with the compressor clutch, what shall I do now? connecting both of them in series? both in parallel? .. or using only the binary switch?
I'm really leaning towards connecting only the binary switch, as that what Vintage Air do with their universal kit, but again, i'm not %100 sure.
Connect all switches in series. They are closed in normal operation, and if any of them open you want the compressor to stop. If you can find a working POA valve use it, it is a much better system. If you are building a TXV system from scratch, fit a thermal switch on the evaporator instead of a "POA eliminator" cycling switch. In a desert climate you may not have problems with evaporator freezing, even if you don't use a POA valve or cycling switch.
Edited: Sun August 02, 2009 at 1:32 PM by mk378
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