This board is primarily utilized in the newer Reznor UD and UB models

It features high-precision brass burner orifices and a heavy-duty regulator spring to maintain consistent Btu/h output while preventing the soot accumulation or flame lifting common with improper fuel-to-air ratios

this device ensures rapid response to electrical faults

Using a motor with incorrect horsepower or RPM can lead to compressor overheating or fan blade imbalance

Greenheck 384591 Limit Switch 322027-701 This board is primarily utilizedThe Greenheck 384591 High Limit Switch is a critical safety component engineered for precise thermal protection in commercial HVAC systems, specifically within Greenheck makeup air units and duct heaters. Designed as a manual reset limit switch, this sensor monitors discharge air temperatures to prevent heat exchanger damage or hazardous overheating conditions. This HVAC high limit control features a fixed temperature trip point, ensuring the circuit