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No Differential Pressure Required: The internal pilot-operated design ensures the valve opens reliably from zero PSI up to its maximum rating
Vapor-Charged Sensing: The 20' sensing bulb is spot-sensitive
Efficiency: Extremely low air consumption (10 SCIM max) reduces the overall load on your instrument air compressor
'NoPP' signifies that there is no pre-purge period
allowing technicians to clear sediment or replace internals without dismantling the entire iron body assembly
Carrier HH19ZA190 Limit Switch 321894-709 No Differential Pressure Required: TheThe Carrier HH19ZA190 Limit Switch is a critical safety component engineered for precise thermal monitoring in residential and commercial HVAC furnace systems. This temperature actuated switch is designed to protect equipment and ductwork from overheating by interrupting the electrical circuit when the high limit threshold is reached. Specifically calibrated with a 190F Open and 150F Close thermal profile, it serves as a reliable flame rollout switch
