Lochinvar & A.O. Smith 100113143 Switch 322838-754 How do you adjust the
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Lochinvar & A.O. Smith 100113143 Switch 322838 754 How do you adjust the How do you adjust the trip point on the 8021204174 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)