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-   -   What does a relay do on a Trane XL-80 (https://www.askmehelpdesk.com/showthread.php?t=495624)

  • Aug 6, 2010, 05:38 PM
    Crazyg999
    What does a relay do on a Trane XL-80
    Mh
  • Aug 6, 2010, 05:43 PM
    Stratmando

    It allows Large Current/Voltage to be controlled by small low voltage wires from thermostat.
    In most AC's, the relays/contactors are controlled by 24 volts AC.

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