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Wwest,
We promote the use of our binary low high pressure switch for these reasons:
1) Certain regulations required a switch.
2) If system refrigerant levels run too low the compressor can be damaged
do to lack of sufficient refrigerant/oil flow.
3) Excessive high side pressures can blow out the compressor nose seal.
Unless you can prove to your peers that your theory of over pressurizing of the system
is caused by engine heat, meaning you can provide real data of system pressures
A) System turned off, prior to starting engine and running AC
B) System running normally
C) System turned off, after running engine and AC
Everything you continually post on all the threads is simply your own personal
theory.
The 911/930 system equalizes rather quickly when the engine is turned off; the high side drops and the low side rises. The high side bleeds over to the low side through the TEV (no matter how cold the evaporator was before hand), its just a simple fact based on the construction of the TEV. And this is true for various other types of systems (industrial, commercial, residential), all depending upon the TEV design.
So tell us, how many 911 or 930' air conditioning systems have you worked on in the past 30 years?
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