Installing 4th Gen Thermostat

[MWest]

I am installing the NEST 4th Gen thermostat, replacing an old Honeywell thermostat. I have a dual-fuel system -- Heat Pump and propane. As originally wired with the Honeywell thermostat, the white wire goes to the E terminal but there is a jumper wire connecting the E to the AUX. My understanding is that this means that when the system calls for either the emergency heat or the axillary heat, the same thing happens, which is that the propane furnace starts up and provides the heat. 

The installation instructions say to remove any jumpers. (There is a jumper between the R and the RC which I removed.)  If I follow the instructions for only an E wire (and ignore the jumper to AUX) then the white E wire goes to the * terminal, but if I tell the app that I have both an E and an AUX wire, then the E goes to the * terminal and the the AUX wire would go to the W2/AUX terminal. 

Any guidance would be helpful. Having the wire go only to the * terminal and nothing to the W2/AUX terminal does not seem like the right option. Do I need to make a tail for the white wire so it goes to both the * and the W2/AUX terminals? 

A second issue is that I have 2 wires on the Honeywell going to the S1 and S2 terminals. The NEST instructions have allow me to say I have these wires, but do not say what to do with them on the NEST thermostat.

I have a picture of the Honeywell wiring which I can post if I can find the link for uploading a picture.

Thanks.

[Patrick_Caezza]

@MWest 

Give this wiring a try.

White - E to W2/AUX (jumper to AUX not needed)

Brown - S1 - Not used, tape off

Blue - S2 - Not used, tape off

Red - R to Rc (jumper to RC not needed)

Orange - O/B to OB

Yellow - Y to Y1

Green - G to G

Black - C to C

The S1 and S2 terminals are for an outdoor tempature sensor that is not compatible with Nest thermostats

A lot of times the E and AUX terminals are connected when the thermostat has an Emergency Heat switch but the furnace doesn't have emergecy heat installed. This allows the thermosat to use the AUX heat when emergency heat is called from from the thermostat.

[MWest]

Thank you. I appreciate the help and will finish this up today.