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vegaflex 81 erratic reading?

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powerjunx

Electrical
Sep 13, 2002
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hello there, i got an erratic reading of vegaflex 81 which measures the level of LPG Economizer Tank.. This tank is use either FLSC (flash liquid sub-cooling) or LSC operation. 2 out of 3 (separate) tanks has experience erratic reading where the level control valves restlessly moving 0 to 80%. Thus, it fills the tank with more LPG condensate and triggers the high level shutdown of the compressor.

Checking the control loop and wiring connection neither resolve the issue. see drawing.

Any thoughts?


"..the more, the merrier" Genghis Khan

 
 http://files.engineering.com/getfile.aspx?folder=5397f63d-3596-4b86-be84-5c6795032fff&file=comp_economizer.jpg
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