Div 1 environments and portable air systems

It features a 1/4" SAE flare equalizer and a 5-foot capillary tube

and rollout sensors to maintain safe heater operation

model X11873B5B

Rugged Construction: Compact NEMA 2 housing protects internal components in demanding mechanical room environments

Resideo ST9103A1002 Electronic Fan Timer THPU32HP7Y Div 1 environments and portableThe Resideo ST9103A1002 serves as a robust electronic fan timer for modernizing HVAC furnace controls in both oil and gas applications. As a direct replacement electronic fan timer for the legacy 20123101 model, this unit functions as the primary 18 30 Vac interface for the combustion air blower, circulating fan, and oil primary control circuit. It features a fixed 45 second heat on delay and adjustable fan off delay settingsconfigurable to 60, 90,