Description
The Navien Tankless Water Heaters 30020776A Thermal Fuse NFB-175/200 is a safety cutoff component used to interrupt electrical flow when excessive heat is detected in tankless water heating equipment in HVAC systems. It operates through a temperature-sensitive fusible element that opens the circuit at calibrated limits and stopping power supply to heating components once overheating conditions occur and it must be replaced after activation. It is mounted on or near the heat exchanger or exhaust path where temperature monitoring is essential for system protection and regulation. It safeguards internal components from heat and maintains safe operating conditions such as tankless water heaters.
