Reznor 221228 Switch

Maintaining unit heater performance requires precise safety interlocks. The Reznor 221228 Switch is a high-tolerance single-pole single-throw (SPST) safety device engineered to verify proper venting and combustion airflow before allowing the ignition sequence to proceed. This Reznor 221228 2.30" WC SPST Pressure Switch is set to trigger at 2.30 inches of water column, making it a critical component for Reznor unit heater maintenance and ensuring system integrity. As a genuine Reznor OEM replacement part, it provides an exact dimensional and electrical match for a variety of Reznor high-efficiency heaters, including popular UEAS 180, 260, and 310 models. It is specifically designed for HVAC pressure switch replacement in low-static applications and functions reliably at elevations up to 6,000 feet. By accurately sensing pressure differentials in the venter housing, this switch prevents operation during blocked vent or blower failure conditions, protecting the heat exchanger and burner assembly from thermal stress and improper combustion.

Key Benefits

• Precise 2.30" WC Setpoint: Calibrated for specific high-efficiency Reznor units to ensure safe draft levels.
• SPST Configuration: Simplifies troubleshooting and installation with a standard single-pole design.
• OEM Standards: Guaranteed compatibility with UEAS series low-static unit heaters, eliminating fitment issues common with universal parts.
• High-Altitude Compatibility: Verified for reliable performance in installations ranging from 0 to 6,000 feet.
• Rugged Construction: Built to withstand commercial HVAC environments and various operational pressure thresholds.

Common Questions

Which models are compatible with this switch?
This switch is primarily designed for high-efficiency low-static models like the Reznor UEAS 180, UEAS 260, and UEAS 310 series.

What symptom indicates this switch needs replacement?
If the venter motor runs but the burner fails to ignite, a "pressure switch stuck open" fault is often the cause, typically due to a ruptured diaphragm or carbon buildup in the sensing port.

Can I use this switch at high altitudes?
Yes, this specific model is rated for operation up to 6,000 feet. For altitudes exceeding this, specialized high-altitude kits may be required per manufacturer specifications.

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.