w/e and w2 jumper wire

[Ozarkham]

I have a geothermal heat pump with backup electric coil heat and two stage compressor. The old thermostat has wires to C, O, W/E (with jumper to W2), Rc (with jumper to Rh), G, Y, and Y2. I understand that the jumper is not needed for Rc to Rh as there is an internal jumper in place. I don't understand what to do with the jumper from W/E to W2. How do I wire that in the Next Learning Thermostat?

[Markjosephp · Accepted solution]

Hello Ozarkham,

It's great that you're upgrading to a Next Learning Thermostat for your geothermal heat pump system. Regarding the jumper from W/E to W2, in the context of a geothermal system with backup electric coil heat and a two-stage compressor, you'll want to pay attention to the wiring.

Typically, the W2 terminal is used for second-stage heating, which in your case would be the electric coil heat. Since you mentioned a jumper from W/E to W2 in the old thermostat, it indicates that the emergency heat (E) and second-stage heat (W2) are jumpered together.

When wiring your Next Learning Thermostat, you can connect the W/E wire to the W2/AUX terminal. The Next Thermostat is designed to handle both auxiliary heating (W2) and emergency heating (E) within the same terminal.

So, in summary:

• Connect the C, G, Y, and Y2 wires to their respective terminals on the Next Thermostat.
• Connect the W/E wire to the W2/AUX terminal.

If you have any doubts, post a picture here of your old thermostat's wiring setup. Let me know if you have more questions.

Regards,
Mark

[Ozarkham]

Thanks

[Markjosephp]

Hi Ozarkham,

You're most welcome! It looks like we have come to a solution. If you have any other concerns or questions, let me know. But you can always start a new thread for any future inquiries.

Best regards,
Mark

[Cloudse]

I also have a heat pump with backup electric coil heat and emergency heat (the back up and emergency are the same source). The old/current thermostat has wires to C, O, W/E (with a jumper to W2), R, G, and Y. Would the solution above be the same for my wiring set up? I can attach an image for more information if needed. 

Thank you!

[Markjosephp]

Hello Cloudse,

I would be glad to assist. The wiring for your heat pump, which uses the same source for both emergency and backup electric coil heat, may be a little different from the typical configuration. But it looks like a conventional heat pump setup based on the wires you provided (C, O, W/E with a jumper to W2, R, G, Y).

To give you more precise instructions, it would be helpful to see a picture of the wiring on your thermostat as it is now. I could examine the connections and provide customized guidance based on an image you might send. To insert an image in a post:

1. Reply to this post.
2. Click Insert Image (camera icon).
3. Choose an image source location.
4. Follow the on-screen instructions.

Keep me posted.

Best regards,

Mark