Resideo L4006E1117 Aquastat Controller 321702-401 sensitive diaphragm that maintains accuracy

sensitive diaphragm that maintains accuracy even at extremely low pressures

allowing for versatile tuning across various heating and cooling stages

mismatched pans can lead to system leaks or restricted airflow

the RDB160BNU is powered by the same AC 24 V source as the fan coil controller

State forced-draft models

Resideo L4006E1117 Aquastat Controller 321702-401 sensitive diaphragm that maintains accuracyThe Resideo L4006E1117 Aquastat Controller is a professional grade high limit manual reset immersion device engineered for precision liquid temperature regulation in hydronic systems, boilers, and storage tanks. Featuring an SPST switch that reliably breaks the circuit on temperature rise, this controller is a critical safety component to prevent equipment overheating. The unit is equipped with a 3 8" x 2 7 8" copper bulb and a 1 1 2" capillary,