Part 55 Description - 5100 Series
Limit Switch 250D Manual Reset (Upper)
The outlet water temperature limit switch is located inside the base of the system on the left side and can be accessed through the exchanger access panel.
This linear limit switch monitors the temperature of the water in the exchanger and interrupts power to the core blower if a water temperature of 250°F is exceeded.
If this switch opens, the core blower will not operate until the reset button on the face of the limit switch is pressed.
