I enjoy a 3 ton heatpump tempstar and 3.5 ton airhandler comfortmaker beside a txv is this a biflow txv? reson i ask when it is runing in grill the low side...
reson i ask when it is runing in grill the low side pressure jumps up to 125-130 psi but when it surrounded by ac runs 55-60 psi the outside unit have a txv in it and the upper air handler has one surrounded by it also
Answers: They are both biflow. What's the temp. on the t-stat? What was the guide pressure running in the boil mode? The outside txv is for the heat, and the inside txv is for the cooling. Make sure your filter is verbs, and call a professional to check the refrigerant.
From where on earth are you measuring the pressure? If you are measure the vapor tube, it will be higher. The outdoor element should have a third access fitting that go directly to the suction side of your compressor. Take your suction reading there, not the vapor tube.