Lochinvar & A.O. Smith 100111255 Control Board 321894-709 The Paragon 8145-20 uses a

The Paragon 8145-20 uses a remote sensing thermostat or pressure switch wired to the solenoid coil

this 1-1/8 ODF solder sight glass features a high-visibility fused glass disc that allows for immediate identification of bubbles

providing the necessary isolation between sensitive control boards and high-voltage line components

5-inch high-temperature leads with an AMP connector eliminate the need for field splicing or re-pinning

and a manual opener lever is included for bypass during power failures

Lochinvar & A.O. Smith 100111255 Control Board 321894-709 The Paragon 8145-20 uses aThe Lochinvar & A. O. Smith 100111255 Control Board is a critical OEM replacement part designed for high performance commercial water heaters and hydronic heating systems. As a central control board, it manages vital system diagnostics, ignition sequences, and multi stage temperature regulation to ensure peak operational safety. This HVAC control module is the direct replacement for obsolete part number 9006520005, engineered to restore factory spec