Carrier HH57ZC003 Enthalpy Switch R-134A Using the genuine Lochinvar 100109941

Using the genuine Lochinvar 100109941 is critical to maintain the proper ignition sequence and avoid damage to the control board or improper burner alignment

two-position valve body allows for tool-free actuator installation and removal

ensuring the sensor only reads actual water levels

Standardized Integration: Exact fit for Parker H23 series valves

providing flexible wiring options for normally open or normally closed logic

Carrier HH57ZC003 Enthalpy Switch R-134A Using the genuine Lochinvar 100109941The Carrier HH57ZC003 Enthalpy Switch is a critical component for optimizing economizer control systems and enhancing energy management in commercial HVACR applications. This genuine OEM replacement part measures both ambient temperature and relative humidity to calculate air enthalpy, providing precise relay output for damper modulation. By evaluating real time atmospheric conditions rather than simple dry bulb temperature, the HH57ZC003 determines