Lochinvar & A.O. Smith 100113143 Switch 322838-754 this F135-30F fan control ensures
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Lochinvar & A.O. Smith 100113143 Switch 322838 754 this F135 30F fan control ensures this F135 30F fan control ensures the fan engages when the plenum reaches 135°F and terminates operation once it cools to 105°F (30°F differential) How do you adjust the trip point on the 8021204174