Common Questions: What causes a Lochinvar ignition lockout

This SPST break-on-rise control is built with a negative biased power element diaphragm

As an OEM McQuay replacement part

Access Security: Includes customizable keypad lockouts and access codes to prevent unauthorized setpoint adjustments in public spaces

using it with 24V or 750mV circuits will result in failure

Johnson Controls P352PN-2 Pressure Control Els PW 17895 Common Questions: What causes aJohnson Controls P352PN 2 Electronic Proportional Pressure Control, 0 to 100 Psi Setpoint, 5 to 50 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 Jumoer Selectable, LED Indication, Nema 1 P352PN 2 is identical to P352PN 2C