View Full Version : hot gas bypass
08-08-2005, 02:20 PM
Sporlin sdr-4 hot gas by pass, dumps in just after txv valve into evap. Valve is still opening and closing even after temp. control board has stopped sending signel. Pid control, valve & board have all been replaced still no luck, maybe getting a backfeed? Any help thanks. P.s. unit is 30ton process chiller
08-08-2005, 04:32 PM
is it possible that your board is use like a interface and be control from an external controller, ?
03-02-2010, 12:49 PM
Is the jumper on the tcb board in the right position or is logic inverted?
Lowtemp enviormental chambers
03-02-2010, 06:11 PM
More info. please. Pressures, temps, etc. Try isolating valve and watch your suction ,valve may be doing its job due to low charge or starving evap. from improper metering. Again a little more info please.
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