Reznor 259780 Relay

The Reznor 259780 Time Delay Relay is a critical OEM component engineered for sequence control in Reznor HVAC systems. Specifically utilized in RP/PGBL model duct furnaces and packaged units, this 120V time delay relay (Thermodisc #12S22 305587) regulates the activation of blower motors and fans to prevent rapid cycling. By coordinating the start-up sequence between the burner and the distribution fan, it protects electrical contacts from premature wear and ensures the heat exchanger reaches optimal temperature before airflow begins, preventing "cold blow" into the space.

This OEM replacement relay is verified for use in a broad range of legacy and current models, including Reznor RP, HRPD, RPB, RPBL, SC, SCE, and SSCBL units. It also serves as the official replacement for superseded parts, including the Texas Instruments 60000GO-17 (PN 46233) and the ICM CTVR-AT1207 (PN 259518). In high-demand industrial HVAC applications, the Reznor 259780 maintains system stability by mitigating electrical stress on motors and internal fan control boards.

• Direct OEM Fitment: Designed to meet exact specifications for Reznor unit heaters and duct furnaces.
• Blower Timing Control: Precisely manages the delay between ignition and blower activation to maximize efficiency.
• System Longevity: Prevents rapid motor cycling and protects relay contacts from arching and degradation.
• Broad Compatibility: Replaces multiple obsolete part numbers, including PN 46233 and PN 259518.

Which Reznor models use the 259780 relay?
This relay is common in RP, RPB, and SC series furnaces, as well as obsolete models like PCCA, AHCA, and gravity-vented F and B units equipped with power venters.

Can this relay replace the ICM CTVR-AT1207?
Yes, the 259780 is the official replacement part identified in the Reznor PN 259521 installation kit for replacing ICM and Texas Instruments relays.

What is the primary function of this time delay?
It serves as a fan control relay, ensuring the fan does not start until the heat exchanger is sufficiently warm and continues to run briefly after the call for heat ends to dissipate residual energy.

This item is not eligible for free shipping.

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.