Sunday, 31 January 2021

Wiring help changing from WR 1F79 to Vine TJ-225

Hi.
I just bought a Vine TJ-225 thermostat. I was reading the manual to properly install it and I'm really confused with some of the wires.

My old thermostat is a "White Rodgers 1F79" and it has wires on the following terminals: "W2", "E", "O/B", "R", "G", "C and "Y". And The TJ-225 has the following Terminals "RC" and "RH" (with a jumper), "G", "W/E", "Y", "C", "Y2" and "O/B/W2".

Some of the wires, I believe I should connect like this: R--->(RC-RH); G--->G, C--->C and Y--->Y, right?

My question is regarding the wires on the "W2", "E" and "O/B" from the old thermostat. How should I connect them on the TJ-225 since there's only one terminal for "O/B/W2", one for "W/E" and a "Y2"?

Should I connect the "W2" wire to the "W/E" terminal, the "O/B" wire to the "O/B/W2" terminal, and leave the "E" wire disconnected?

Attached are the pictures from my old thermostat "White Rodgers 1F79" and the TJ-225.

Could someone me with this?

Thank you so much.

Sincerely,

Victor
Attached Images
  


source https://hvac-talk.com/vbb/showthread.php?2226209-Wiring-help-changing-from-WR-1F79-to-Vine-TJ-225&goto=newpost

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