Johnson Controls P352PN-4 Pressure Control 30067439-890 The Lennox 18J74 Pressure Switch

The Lennox 18J74 Pressure Switch is a high-precision low ambient pressure switch engineered to regulate head pressure by cycling the outdoor fan motor during cooling cycles

Designed with a 1/4" FNPT connection

it ensures consistent damper or valve positioning

making it suitable for both land-based HVACR and marine applications

This specific model is designed for single-stage or multi-speed PSC configurations

Johnson Controls P352PN-4 Pressure Control 30067439-890 The Lennox 18J74 Pressure SwitchElectronic Proportional Pressure Control, 240 to 600 Psi Setpoint, 10 to 100 Psi Throttling Range, 24 Vac ( Supplied by Y350R Power Module ), 0 to 10 Vdc and 0 to 20 mA Analog Output, Direct or Reverse Action is Jumper Selectable, LED Indication, Nema 1 P352PN 4 is identical to P352PN 4C