Lochinvar L100208231 Time Delay Fuse 250V 3.15A

Product Description

The LOCHINVAR L100208231 is a time delay fuse rated at 250 VAC and 3.15 amps, designed for use in high-efficiency fire tube boiler systems. Time delay fuses allow brief inrush current surges without nuisance tripping while still providing reliable overcurrent protection. This fuse is a direct OEM-compatible replacement component installed by licensed HVAC or plumbing technicians during routine service or fault diagnosis. Its compact form factor fits standard fuse holders found in the boiler control circuit, and its slow-blow characteristic is well-suited to the motor and transformer loads common in modern condensing boiler systems.

This fuse is specified for use with the Knight Model KH55 to 285 Fire Tube Boiler. It is installed within the boiler control panel or fuse block as part of the low-voltage or line-voltage protection circuit. Technicians servicing residential or light commercial Knight boiler installations will encounter this fuse during electrical diagnostics, blown-fuse replacement, or control board servicing. Proper fuse selection by rating is critical to maintaining equipment protection and code compliance.

Key Features

• Time delay (slow-blow) design tolerates brief inrush current without nuisance tripping
• Rated at 250 VAC for compatibility with standard boiler control circuits
• 3.15 amp rating provides precise overcurrent protection for sensitive boiler electronics
• OEM-specified replacement for Knight fire tube boiler models KH55 through 285
• Direct drop-in fit for the existing fuse holder in the control enclosure

Compatibility

Designed for use with the Knight Model KH55 to 285 Fire Tube Boiler as specified by LOCHINVAR.

Installation Notes

This component is installed by a licensed HVAC technician or plumber qualified to service hydronic heating equipment. Always shut off power to the boiler at the service disconnect before accessing the control enclosure or replacing any fuse. Verify the replacement fuse matches the OEM voltage and amperage rating exactly — substituting a higher-rated fuse can defeat overcurrent protection and damage boiler controls. Installation should comply with applicable local electrical codes and the boiler manufacturer's service documentation.

Technical Specifications

• Fuse Type: Time Delay (Slow-Blow)
• Voltage Rating: 250 VAC
• Amperage Rating: 3.15 amps

Standard Information

• Brand: LOCHINVAR
• Manufacturer Part Number: L100208231