Resideo - Honeywell Home WT8840B1000 Water Heater Control

Water Heater Control from Resideo - Honeywell Home WT8840B1000 delivers precise, reliable control for residential gas water heaters. This 90-degree control mounts upright and uses 1/2 inch port connections (Threaded x 1/2 inch Inverted Flare) to simplify installation with standard valve assemblies. With an input rating of 350 to 850 millivolts DC, it integrates seamlessly with gas valve systems, while the integrated NTC temperature sensor provides accurate temperature feedback. The unit supports a 0 to 150°F temperature range and is designed for use with 1 inch tank insulation, ensuring efficient operation across typical indoor conditions (ambient 32°F to 150°F; storage down to -40°F).

• Integrated NTC Temperature Sensor
• 1/2 in port connections (Threaded x Inverted Flare)
• 350–850 mV DC input for gas valve compatibility
• Temperature range: 0–150°F with 1 inch tank insulation
• Upright mounting for straightforward installation
• Complies with CSA 6.20/4.6, CAN/CSA C22.2, ANSI Z21.20/Z21.23/Z21.78/Z21.87
• Humidity tolerance up to 95% non-condensing at 104°F

Application: Water Heater • Media Handled: Gas • Ambient and storage temperature ranges ensure dependable operation in typical home environments.