The York S1-7670-3071 Sequencer

or audible humming indicating a breakdown in the internal transformer windings

Integrated Protection: The built-in stainless steel strainer screen protects the seat and disc from scale and pipe dope common in older steam systems

ensuring no onsite field modifications are required

ensuring the valve remains secure and functional in high-traffic mechanical rooms

Carrier HK06WC030 Air Flow Switch 318820-201 The York S1-7670-3071 SequencerThe Carrier HK06WC030 Air Flow Switch is a factory authorized pressure differential switch engineered for precise performance monitoring in commercial and residential HVAC systems. Designed with a single pole double throw (SPDT) configuration, this switch provides versatile circuit control, allowing the system to trigger proof of flow signals or lockout sequences based on static pressure changes. It operates within a sensitivity range of 0. 05 to 2. 0