Johnson Controls P67AA-1 Pressure Control R-410A you must press the reset

you must press the reset button after the unit has cooled and the venting issue is resolved

and high-capacity residential systems

it is fully compatible with R-410A and other modern HFC refrigerants when used with compatible oils

Direct Compatibility: Designed specifically for use with Honeywell HP970 Series and HP972 Series sensors

Does this unit require a separate thermometer for calibration

Johnson Controls P67AA-1 Pressure Control R-410A you must press the resetLow Pressure Control, DPST, Opens on Pressure Drop, 3 to 30 Psig Scale Range, 32 to 140 Degree Temperature Range, 1 1 2 to 20 Psi Differential, Angle Barbed Fitting Connector, 50 Psig Maximum Overpressure P67AA 1 is identical to 2366 251 This item does not qualify for free shipping.