York S1-55000-328 Detector Head

The York S1-55000-328 is a high-sensitivity photoelectric duct detector head engineered for rapid smoke detection within environmental air ducts. This OEM York replacement part serves as the direct successor to the legacy S1-55000-225 ionization head, facilitating a critical transition from ionization to photoelectric smoke sensing technology. By utilizing an infrared LED and photo-diode arrangement, the S1-55000-328 excels at detecting slow-burning, smoldering fires while remaining largely unaffected by changes in wind velocity or atmospheric pressure.

Designed for integration with the SL-2000-P duct smoke detector series and compatible with Series 65A bases, this head features a clear-to-red LED indicator for immediate local alarm identification. Its internal light-proof labyrinth chamber and integral gauze protect the optical bench from dust intrusion, ensuring reliable HVAC fire safety monitoring. For contractors maintaining older HVACR systems, this unit provides a drop-in solution to ensure compliance with modern sensing requirements without necessitating full housing replacements.

Key Benefits:

• Direct compatibility: Corrects and replaces obsolete S1-55000-225 ionization heads.
• Advanced sensing: Optimized for smoldering fire detection using light-scattering technology.
• Stable operation: Maintains performance levels across a wide operating voltage range.
• Simplified testing: Features a magnetic test switch option for streamlined field verification.
• Rugged construction: Durable photoelectric head design built for commercial and industrial duct environments.

Common Questions:

Can I use the S1-55000-328 in my old S1-55000-225 housing?
Yes, the S1-55000-328 is designed as the direct replacement for S1-55000-225 and fits the same electrical bases, allowing for a technology upgrade from ionization to photoelectric sensing.

Will this detector head work with the SL-2000-P series?
Absolutely. This photoelectric duct detector head is a standard component for the York SL-2000-P and is also compatible with SM-501 and RT-3000 series housings.

What does it mean if the LED is clear versus red?
In its quiescent (standby) state, the indicator LED is clear. It switches to a solid red light only when the detector head enters an alarm state, providing quick visual troubleshooting for technicians.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.