HIGH-TEMPERATURE LIMIT SWITCH
The high-temperature limit switch is located in the upper access head of the heater. Access is possible
by removing the electrical "T" condulet cover.
The switch operates to prevent overheating in event of primary control failure or blocked circulation of
This control is normally set to open on rising temperature a 450 F. For high temperature operations,
this control is set for 575F. If adjustment is required, turn the adjusting screw clockwise to decrease
temperature or counterclockwise to increase temperature.
Each turn of the adjusting screw changes setting approximately 900F.
Do not remove adjusting screw or turn adjusting screw any further than
necessary for desired operation This action may permanently damage
the unit. When installing a temperature limit switch, avoid torque
in excess of 35 ft. pounds.
Do not oil the unit, any oil around the adjusting screw will flow inside,
contaminating the contacts.
page 3 - 1157)