Field adjustments are not recommended as they can void the ASME certification and compromise the safety of the boiler system

Common Questions What capacitor does the Lennox 21L91 motor require

ensuring a perfect fit and electrical compatibility without field modifications

Features a 2-terminal design for straightforward electrical connection

and extreme weather conditions

Resideo MX128LF Valve 320819-301 Field adjustments are not recommendedThe Resideo MX128LF is a heavy duty 1 1 4 inch lead free thermostatic mixing valve engineered for high capacity domestic hot water and hydronic heating systems. Designed for master mixing applications, this large flow mixing valve provides precise temperature control across a 110F to 150F range, making it a standard choice for mechanical contractors managing commercial plumbing systems. The MX Series utilizes a proportional valve with a thermostatic