Proper installation of this HVAC safety switch prevents heat exchanger cracking and maintains peak system efficiency by preventing thermal overstress

consistent 120V ignition trials

The throat block is designed to sense outlet pressure internally

though technicians must use a calibrated manometer to ensure settings meet the specific requirements listed on the equipment data plate

ensuring a secure Nordyne M0036021R installation

Lennox 21G88 Disconnect Switch 321702-401 Proper installation of this HVACThe Lennox 21G88 Disconnect Switch is a heavy duty, 3 pole electrical safety component engineered for high demand industrial and commercial HVACR applications. Rated for 600V 150Amp service, this unit provides a reliable manual breaking point to isolate 3 phase power during critical system maintenance or emergency repairs. Built with a rugged steel housing and a high conductivity copper alloy contact system, the 21G88 is designed to withstand the