Honeywell WT8840B1500 AO Smith Water Heater Gas Valve Replacement
The WT8840B1500 Water Heater Control is designed to replace WV8840 valves in A.O. Smith water heaters. It has a 2" insulation tank and a 5" WC setting.
This control is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. All models of WT8840 controls include an integrated NTC temperature sensor.
The WT8840 controls are powered from a thermopile heated by the standing pilot flame. CS8840 pilot assemblies are designed for use with this control.
The immersion well for sensing water temperature has matched NTC thermistor sensors. These sensors provide the fail-safe mechanism through which the WT8840 controls can provide both accurate water temperature control as well as water temperature limit (Temperature Cut-Out [TCO]) function.