This Reznor 201158 pressure switch is designed to monitor differential air or flue gas pressure within HVAC/R systems, commonly found in Reznor unit heaters. With a rating of 1-1/10 inches of water column (WC), it plays a crucial role in ensuring the safe and efficient operation of the heating equipment. HVAC/R technicians rely on such switches to verify proper airflow or venting before allowing the burner to ignite.
The pressure switch acts as a safety interlock, preventing the unit from operating if there isn't adequate airflow for combustion or if the venting system is obstructed. This protects against potential hazards like carbon monoxide buildup and ensures complete combustion. It's a common replacement part for troubleshooting ignition failures or intermittent operation in gas-fired unit heaters.
When selecting this pressure switch, it is essential for HVAC/R professionals to confirm the required WC rating and compatibility with the specific Reznor unit heater model. Accurate pressure sensing is vital for the heater's control system to function correctly, maintaining both safety and performance. Always consult the equipment's wiring diagram and service manual for proper installation and calibration.
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