Johnson Controls AFS-460-DSS Sensing Switch Els PW 17895 this thermal expansion tank comes

this thermal expansion tank comes with a factory pre-charge of 20 PSI

System Compatibility: Ideal for use as a pneumatic restrictor tee in Johnson Controls and other manufacturers' air-operated systems

It comes with 18-inch leads and should be wired according to the original 120V control circuit specifications for your zone valve or damper system

including the GG9S and MG9S series

Does this unit require regular maintenance

Johnson Controls AFS-460-DSS Sensing Switch Els PW 17895 this thermal expansion tank comesFor contractors managing airflow verification in sensitive HVAC systems, the Johnson Controls AFS 460 DSS Sensing Switch provides the redundancy and manual intervention required for critical safety protocols. This industrial grade air pressure sensing switch is designed to monitor positive, negative, or differential air pressure within a range of 1. 25" 0. 06" to 12" w. c. Featuring two SPST normally closed contact arrangements, this dual switch