Dual fuel Nest 3rd Gen Question

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Old 06-05-19, 01:46 PM
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Dual fuel Nest 3rd Gen Question

Probably has been answered before, so my apologies if so. I have an hvac system with heat pump and gas furnace. I would like to install my Nest 3rd Gen myself, just not quite sure on the wiring. Old thermostat is wired with O,R,G,Y1,W1,C,E and 2 wires from outdoor temp sensors (which i know will not be used). The white wire from the wall goes directly to E with a jumper to the W1. I'm confident on all but the white wire. Old thermostat/system is Lennox.
 
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06-05-19, 02:59 PM
Astuff
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It should ask you as part of the standard step by step set up routine when it sees both O/B and W1 wires. Think of the pro setup menu as "advanced" menu settings.
 
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Old 06-05-19, 02:06 PM
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With a Nest you would put the white wire in W1. Then when setting up it will ask if you have dual fuel. You have dual fuel since you have gas and a heat pump.
 
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Old 06-05-19, 02:13 PM
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Would that be during a pro setup or "regular"? And thanks for the answer on the wiring. In other words, is it necessary for Pro setup if i have dual fuel?
 
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Old 06-05-19, 02:59 PM
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It should ask you as part of the standard step by step set up routine when it sees both O/B and W1 wires. Think of the pro setup menu as "advanced" menu settings.
 
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Old 06-05-19, 06:51 PM
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Just wanted to say thank you for the quick, super simple, yet very helpful replies. Got it hooked up and it's running just fine.
 
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