the compressor running continuously without reaching setpoints

It should not be used with 80V silicon nitride ignitors without a proper conversion kit

Professionals should always check the unit model number and serial number to ensure all pin connectors and mounting footprints align with the existing cabinet layout

It features a standard 3/4 inch NPT connection

Belimo ZONE120NO Actuator 321894-708 the compressor running continuously withoutFor contractors requiring a dependable zone valve actuator, the Belimo ZONE120NO is engineered for robust performance in hydronic systems. This spring return valve actuator 120V operates with a normally open (NO) configuration, ensuring fail safe operation by returning to its open position upon power loss. Designed for on off control actuator applications, it provides precise and reliable modulation of fluid flow. With a nominal voltage of AC 120 V