you ensure the valve stem reaches the exact position dictated by the controller

typically rated for a maximum inlet pressure of 10 PSIG

or restricted secondary drainage

this component is equipped with a 120V AC coil

Lennox 12S77 Heater Els PW 17895 you ensure the valve stemThe Lennox 12S77 (Model ECB25 12. 5CB 9) is a high performance 12. 5KW electric heater kit specifically engineered for seamless integration with CBX25UH and CBX25UHV series air handlers. This auxiliary heat section provides reliable supplemental or emergency heating, ensuring system setpoints are maintained during extreme ambient drops. Designed for three phase power applications, the unit operates across a versatile voltage range of 208V to 230 460V,