Immersion type controllers for hydronic heating systems that turn off the burner whenever the boiler water temperature rises to the set point. At the set point temperature, a diaphragm-actuated snap switch breaks the power supply to the burner primary control. High Limit Aquastat Controller has adjustable set point.
- A factory-set stop is available on L4080 to prevent setting the control at too high a temperature
- Liquid fill in sensing element expands as the boiler temperature rises
- Maximum minus 40°F above set point or 265°F, whichever is lower
- Mount using 1/4 in. NPT female threads or surface mount through base of case