Wiring on the old one, "X", probably a brown wire will not be used on the new stat. If it's a blue wire, this may be your common. "E" and "W2" probably wired together with a white wire, this controls electric heat. "R" with a red wire, this is 24 volt power. "O" is an orange wire, this is the reversing valve. "Y" is a yellow wire, this is the contactor. "G" is a green wire, this is the blower. This pretty accurate? On the new stat, the jumper should be connecting "RH" to "RC/R", leave it in and wire the "R" from your old one to either terminal. White from the old one will go to the "E" of the new one. If your electric heat doesn't work after the install, you may need to jumper the "W1" and "W2" with the "E". "O" wires to "O". "Y" from the old one wires to the "Y1" of the new. "G" wires to "G". "C" on the new one is common. Usually a blue wire goes here. If "X" on the old one was blue, plug it into the "C". If it was brown, I'd suggest not using a common, and installing batteries. Hope this helps.

I have an old thermostat -- 7 wire -- LR69071 but could not find
how to hook it up to a new 5 wire -- 44200a digital

Is it possible that this new thermostat not compatible with the old one.