ensure chemical compatibility with the NBR seals and aluminum body before use with other media

This TUB series expansion valve is optimized for R404A/R507A refrigerants

Multi-Try Ignition: Three-try sequence maximizes burner startup reliability in cold-start conditions

5-inch NPT female inlet and a 2-inch NPT female expanded outlet to facilitate rapid pressure discharge

Always verify the rotation of the existing blower wheel before finalizing the wiring to ensure air is pushed in the correct direction

Carrier HH19ZA190 Limit Switch 319847-401 ensure chemical compatibility with 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