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24v source for honeywell wifi thermostat

rrob311 Member Posts: 15
I have an Olsen oil furnace with a beckett pump, I just installed an r7284u control. I have a new Honeywell wifi thermostat that requires a 24v input to run. I am trying to figure out where to get the 24v from. I would really like to get this setup so I can remotely view the temp at the house.


  • Eric_32
    Eric_32 Member Posts: 267
    That primary control or the furnace is not going to give you 24-volts... you will have to add a 24 volt transformer....
  • John Mills_5
    John Mills_5 Member Posts: 952
    White-Rodgers Sensi doesn't need a common.
  • shawnnolan
    shawnnolan Member Posts: 7
    try adding an isolation relay, worked for me on a similar setup.
  • SWEI
    SWEI Member Posts: 7,356
    Honeywell R8845U will take care of it all in one box.