Johnson Controls P499VAP-105K Pressure Transducer Kit 321042-401 The Nordyne 621898R Relay is

The Nordyne 621898R Relay is a heavy-duty Normally Open (N/O) 30Amp Relay designed for critical switching in HVACR systems

Designed for rugged field environments

the fan running continuously even when the thermostat is satisfied

providing a reliable ignition source across diverse equipment

Dual Section Functionality: Supports both compressor and fan motor operation simultaneously

Johnson Controls P499VAP-105K Pressure Transducer Kit 321042-401 The Nordyne 621898R Relay isThe Johnson Controls P499VAP 105K is a precision electronic pressure transducer engineered for demanding HVACR applications, providing a linear 0 to 10 Vdc output signal. Designed for high side pressure monitoring in commercial refrigeration and air conditioning systems, this kit features a 0 to 500 psi range with a robust 1 8" 27 NPT external thread fitting. As the direct replacement for the legacy P499VAP 105, it utilizes a stainless steel