Clean the pilot orifice and ensure the wire connections to the valve terminals are secure

this general purpose pressure switch delivers consistent performance

This part is specifically the grille assembly

fitting common Allied and Armstrong units

How do I adjust the Sporlan ORIT-10 0-50 PSI valve

Siemens Building Technology 134-1504 Thermostat 322055-301 Clean the pilot orifice andThe Siemens Building Technology 134 1504 is a heavy duty, 4 wire 2 circuit electric low temperature detection thermostat designed to protect hydronic coils and heat exchangers from localized freezing. This 15 55F range controller features a DPST switch action and a 20 foot copper capillary element, ensuring that if any one foot section of the bulb senses temperatures below the manual reset setpoint, the circuit trips to shut down fans or close