Reznor 174810 Relay

The Reznor 174810 Time Delay Relay is a critical OEM replacement component designed for official use in Reznor HVAC equipment, including gas-fired unit heaters and furnace systems. Engineered to manage the precise timing and sequencing of electrical circuits, this relay effectively controls the fan pre-purge and cooling periods. By delaying the start or stop of the blower motor in relation to the burner cycle, the 174810 relay prevents short-cycling, maximizes heat exchanger efficiency, and protects sensitive internal components from thermal stress. This HVAC time delay relay features an ON/OFF cycle timing range typically between 1 and 110 seconds, ensuring the unit operates within manufacturer safety parameters. As a genuine Reznor 174810 part, it provides the exact electrical specifications required for compatibility with models such as the UDAP, UDAS, and F series, offering a more reliable and safer alternative to generic electric heat sequencers often found in the aftermarket.

• OEM Compatibility: Specifically designed as a direct replacement for Reznor 174810 and 234300 relay models to ensure a perfect fit in commercial unit heaters.
• System Efficiency: Manages fan delay timing to allow the heat exchanger to reach optimal temperatures before airflow starts and ensures residual heat is dissipated after the cycle ends.
• Equipment Longevity: Helps prevent furnace short-cycling, reducing mechanical wear on the blower motor and gas valve components.
• Specific Timing Control: Offers dedicated time-on and time-off delay settings that are more precise than standard universal sequencers.

Can I use a universal sequencer instead of the Reznor 174810?

While standard sequencers may look similar, the Reznor 174810 relay is calibrated with specific 1-110 second timing logic required for gas-fired units. Using a non-OEM part can lead to unsafe operating conditions or logic errors in the control board.

What are the signs that a time delay relay has failed?

Common symptoms include the fan failing to start after the burner ignites, the blower running continuously even after the heat cycle concludes, or the unit tripping limit switches due to insufficient airflow timing.

Does this relay support multiple heater configurations?

Yes, this component is frequently used in multiple heater control kits to synchronize the operation of up to five heaters from a single thermostat signal.

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.