TM 5-3895-374-24-2HIGH-TEMPERATURELIMITSWITCHThe high-temperature limit switch is located in the upper access head of the heater. Access is possibleby removing the electrical "T" condulet cover.The switch operates to prevent overheating in event of primary control failure or blocked circulation ofthe heater.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 decreasetemperature or counterclockwise to increase temperature.Each turn of the adjusting screw changes setting approximately 900F.CAUTION:Do not remove adjusting screw or turn adjusting screw any further thannecessary for desired operation’ This action may permanently damagethe unit. When installing a temperature limit switch, avoid torquein 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)
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