I'm fairly confident at the 6:37 mark you may have accidentally changed the setting back to the original emergency from dual fuel! thanks for the vid man!
Hey Chuck... thanks for the demo! Just had installed a heat pump with propane furnace alt heat. This is the best explanation I’ve been able to find for wiring for this equipment... one question: when I view the equipment setup on the Nest Gen 3 and on the Nest app, it indicates 3 heat sources (1) heat pump heating (2) alt heating, propane furnace (3) 2nd stage alt heating, propane furnace. Also indicates heat pump cooling and, fan. Both (W1) and (*) are connected to the same terminal on the air handler control board... The indication of 3 heat sources caused me some trepidation at first because, I have only single stage propane furnace. But after thinking it through, I assume the second stage alt heat is what gives me emergency heat function when the outside air temp is above my 40 degree lock out set point?... is that your interpretation, as well?
I understand your video. I currently have a duel fuel Heat pump/AC, and gas forced air system. However, my system has two additional wires (Red, Wight) total of ten wires for I believe the furnace power. Do I need to add a jumper wire? Exactly where?
Any reason you connected the alt stage 2 to the star instead of the W2? In the Nest Pro guideline setup it doesn’t show any wires connected to the star for dual fuel - one stage heat pump
Thanks had an issue when someone installed the wrong one in someone’s house now I see they built in the fossil fuel kits into the thermostat thanks for the video 👍
Hi my name is Albert from northern va, and I was wondering whether you can show the wiring on a ECM daikin gas furnace and a 14 seer single stage heat pump using the nest. Thanks you.
I Was wondering can you use the nest as a duel fuel system to use a wood burner boiler and a electric furnace as back up. I dont know much about this. And have some questions.
Can u do dual fuel when you have a stand alone heat pump and indoor air handler without heat strips. And have a oil forced hot water system with baseboard radient as ur back up heat?
I have to replace my A coil, line set and out door 5 ton condenser. With LPG cost going up and down and issues with getting it. I am considering replacing the 5 ton with a 5 ton 15-Seer heat pump and a new A coil and new TXV. I'll also replace line set as I am moving the outside condenser over a bit. Question I like the Gas furnace and the heat, so I want gas heat most all the time. So which Thermostat and or items would be required for me to have total control of when or if the heat pump or furnace is give the command to operate. And if there are wrong or right heat pumps to get. My system is Goodman and it's been great. Looking at the GSX160601 and the CAPF4860C6 A coil. My furnace is a Goodman GMNT-120-5 92% LPG furnace. Suggestions from knowledgeable people have kept me alive so far so I am open, thanks, Ron
I have a very similar system, dual fuel, natural gas backup to heat pump, with a reversing valve. The wiring is almost the same as in the video except I have a brown wire connected to S1 for an outdoor temperature reading (thermistor/RTD). But from what I read the Nest does not use an outdoor thermistor. So, where does the brown wire attached to the * terminal in the video go to? If emergency heat, my emergency heat is the same gas furnace that is the auxiliary heat (would I jumper * to W1 or just ignore the * terminal). The Nest documentation says the * terminal can be used for humidifier, emergency heat or something else, but not an external temp sensor. Then how does Nest know the outdoor temp for determining whether to use the alternate heat or heat pump? If it relies on the internet, what if my internet or Wi Fi stops working? Thank you for the video. It really made me think before dropping $200 on the Nest.
You just tape that S1 wire, and not use it. And you don't jump anything on a Nest, you should ignore the * terminal - the reason is you don't have a separate wire for emergency heat. Nest knows the outdoor temperature by your location through internet. My system also has S1 and S2, which I simply left them out.
All my cables are the same as the one in video except the brown cable. I have white and black cable but then I have a blue one. My Cables are yellow, green, orange, red, white, black, blue. All in sequence. I needed help for installing the blue cable. Mine is dual fuel and live in a apartment with all electric.
I have the Google nest 3rd gen too. And I just installed my new ac unit and it has a heat pump in it. Even though I kinda don't need it cause I have a forced air furnace. How would I wire it to the nest if I was to hook it up. I have my humidifier wired in and it uses the * and I seen where heat pump or duel fuel uses the * so I'm basically lost
Does the Nest Generation 3 thermostat do all the necessary modes..? No need for other accessories like a Bill Porter board, outdoor thermostat..? Can you show the wiring from thermostat to furnace to heatpump please
Hi Chuck, I have a dual fuel system, Lenox heat pump and furnace, and I saw your video. Could you show me where you connect the star terminal into the furnace/heat pump terminals?
Do you have a video for wiring a wood furnace to work primarily over the heat pump, and have them sharing the nest? For example i would like to control both heat sources, with my wood furnace being primary and my heat pump being secondary, or rather to have it turn on if the furnace would go out? I would like the thermostat to control my blower fans on the wood furnace and an electric draft. Thank you for your insight.
Is this for auxiliary heat Because my heat pump is working fine with the nest thermostat but when the weather gets below 30° my auxiliary heat does not turn on
Where does the wire on the star terminal go in the furnace for dual fuel? What's the reason for hooking up to the star terminal? Does the star terminal do anything in defrost mode?
In my case, I presently have a 2-stage natural gas furnace and am using W1 and W2. I have no cooling. I am going to add cooling via a heatpump now, which will give me cooling (Y1 and possibly Y2) and heat-pump driven heating. So how do I (or can I) set up the 3 stages of heating in my Gen 2 Nest: W1 - Heat Pump heating W2 - Furnace-NG heating stage 1 W3 (*) - Furnace-NG heating stage 2 Is that the correct setup or not possible with the Nest?
Short answer is.... just get different thermostats connect them to the heat sources, and as long as they support if this then that functionality... program them to come on.... without having to configure any nest settings. Hope this helps... I use 3 thermostats one from Honeywell for heat pump controlling cool mode for and heat mode for heat pump.... and 2 thermostats (Nest) for tankless gas heater... I use if this then that functionality to control both fuel sources.
how does first stage heat pump work with G on the furnace. My furnace only runs continuous fan at 25% which is not enough CFM for the heat pump heating? How do I get fan to run at full speed?
I just installed the nest thermostat on my heat pump. Condenser unit is not coming on at all. It won't shut off at all constantly running. Any suggestions. There was a jumper wire that I took off. No settings for heat pump
I take it that your nest thermostat is fine now seeing how it's been a year ago since your post. If you go to Nest website (maybe on the app also) you can talk to someone from Nest and give them information on what type of heater you have, if it's gas or electric and then Nest will send you your personal wiring diagram for your heating unit with the Nest thermostat. I do know that Nest doesn't use any jumpers for wiring any of their Thermostats.
hi I have heat pump and hot water gas boiler ( my main heat is hot water radiator ) and can I connect heat pump and hot water boiler as same way that you did on this video and I don't want the fan comes on from heat pump when the boiler start heating up the radiators.
Sir, I am in Dallas Texas. I have a Nest Learning Thermostat (A0013) with a (Daikin) heat pump and just bought it (HP) because I got a GREAT Deal. I never wanted to use the heat Pump for Heat because gas is 1/3 the cost cheaper and is abundant. It cools very well. I continue to want to use the gas furnace for heat all the time and never engage the Heat Pump for heating. Do I need to TRASH this Thermostat for that to happen?
I have a dual fuel system, HP / LP. The wires I have are R,B,W,G,Y. Is it possible that the wiring to switch between heat sources is in the furnace, and not decided by the thermostat? If so, How do I set up my thermostat? still as a dual fuel or as a single fuel? Thanks.
Just purchased Nest Thermostat. I built a new house with gas and heat pump. My old thermostat 5 wires: g, w,b,y,r. The first 4 wires match the new Nest. Where does the red wire go on the Nest.
Question, you said for a duel fuel system, the white wire should be moved from W2 Aux to W1. The wiring diagram Nest sent me said it goes on W2 Aux? I'm confused on where it should go. My system is an electric heat pump with gas back up. A little help please.
Great question! According to Nest - and I shall paraphrase page 19 of their Pro-Installer-Guide - but this is my answer to you: From Nest - For dual fuel, any wires inserted into the W1, W2/AUX, or *(if W3 is chosen) connectors will be treated as alternate heat that will be used instead of the heat pump when needed. Use Pro Setup to indicate the source (gas, electric, geothermal, etc) as well as the delivery mechanism (forced air, radiant, etc) for each W wires connected. The 2nd generation Nest Learning Thermostat supports two wires for alternate heat - additional alternate heat wires are not supported. From me - W1 or W2 can be used on single stage gas furnace. Both W1 and W2 are needed for a two stage gas furnace. The Nest Thermostat recognizes which W is used to configure the program. Thanks!
@@anumber1air I saw that in the Guide and wondered why you moved your W wire from W2 to W1. According to the guide, in a dual fuel setting Nest should treat them identically(?)
Ok so I am so confused, I have watched all the videos and none describe what I have. I have a AC/heatpump outside. But I also have a furnace downstairs that runs off oil. I only have 1 R wire on my old thermostat. I have Y O G R C W E Those are my old thermostat wiring. In the nest, do I hook the E to the star and the W to the W1 on the nest to still have both my heatpump and my furnace as emergency after if gets below 35 degrees outside? Because right now, my thermostat runs off heatpump 35 and up and the oil kicks on at 35 and below.
Have you figured out a solution to your question? I have similar setup. I have a heat pump system with a fireplace furnace all in the same air duct of the house. Trying to figure out if its possible to run all off ones nest thermostat.
Do you know how to disable the heat pump I prefer using gas heat all the time the heat pump is expensive to run I have the 3 generation nest even nest, the tech at nest is having a problem with disabling it crazy how difficult it is, any suggestion would be appreciated .
Did you ever figure this out? One tech told me I could simply unplug the O/B wire and it would run cooling-AC from compressor outside and W1/w2 for each stage of NG heating. Havent tried it yet though.
Hi if we have one unit for 2 story house and need to install 2 nest thermostat, how should we do that? We have itching split system or damper that control our 2 thermostats ...
Fatemeh fallah adl if you have a 2 story house that has one central heat pump air conditioning split system, then you will need to have only 1 heat pump nest or Honeywell thermostat that controls heat for both primary and secondary floors in a single location ( I have my heat pump thermostat on second floor and it controls both 1st floor and 2nd floor since ducts go to both locations.... first floor and second floor) However, the trick is what you would do is make your heat pump/ac as the secondary source of heat.... instead of making primary source of heat.... Yes yes I realize that heat pump is cheaper to operate up to 27 to 40 degrees then gas.... but the problem is sometimes heat pump is simply not as comfortable from all the hot non humid air heating you... causing you allergies.... (unless of course you add humidifier in between the ducts...)... Therefore what I would do in this circumstance this specific circumstance where you happen o have 2 floors.... is to simply have one thermostat for your heat pump..... that controls both floors with push of a button..... and also get your self 2 more thermostats such as Nest thermostats for example.... for your furnace/tankless water heater that heats your radiator pipes with water or steam.... (depending on what your 2ndary fuel system is... mine is tankless water heater that provides heat for both domestic water and radiator space heating....) The 2 more thermostats would allow you to control your radiator heat....for each floor... because the chances are.... you most likely have multiple zones setup for your 2 story house for your radiator pipes.... and therefore if that’s the case then you most certainly will want to use your gas heat source of tankless water heater.... as the primary fuel source vs heat pump..... Why? The reason why is because you want to control each floor separately... and use heat pump in the event of emergency.... such as when for example your tankless water heater breaks.....(mine broke the other day... 3 way valve was broken causing radiators not to heat.... boy was I glad that I had heat pump as backup for both of my floors...) Now the question is.... how do you control all the thermostats automatically... I imagine this is your question..... In my case I have total of 3 thermostats..... 1 to control heat pump.... (Honeywell.... not best....) and another 2 (nest.....) I use 2 nest thermostats to control the heat from radiator gas source..... I use Honeywell for controlling heat pump... Now you may ask.... but how... they from different vendors.... Yes indeed they are.... I use concept of If This Then That..... for nest and for Honeywell thermostats.... without going into any rigorous settings of a single vendor.... In if this then that settings I simply configure.... Nest to hold temperature at 73 degrees for my radiator heat.... at all times and to only turn on heat pump if and only if temperature drops in my home below 70 degrees.... (in circumstances when my tankless heater breaks for example....) So does the temp ever drop below 70? Well yes if it’s very cold... and if it’s very cold and temp can’t be held at 70 that means you must likely have a leak in your window.... (in which case I highly recommend insulating your Windows....)... Sometimes though.... someone may have opened the window on purpose... then yes your heat pump would turn on..... unless you put sensors on windows and connect them to if this then that..... functionality and not turn on the heat pump if the windows are opened..... Now sometimes.... I simply want heat pump to Quickly turn on...... but turn on when I get closer to home..... within approximate 10 miles from home.... Then once again I use if this then that function to turn on the heat pump..... or gas tankless water heater..... Heat pump makes the whole house hot fast vs radiators..... a lot faster.... I use Alexa to control my heat pump and tell Alexa to turn it on using voice.... I also inter-combine my ceiling fan with Alexa as well... and heat pump and gas for maximum comfort in the time when I want some air circulated in my house.... Seems confusing? I know.... if you are confused... you can always get one heat pump for one floor and another for another floor and separate your duct work..... Of you can just keep the duct work the way it is.... but put automated smart registers.... to control the flow of air..... to your first floor and 2nd floor.... and use yes one thermostat only.... in combination with if this then that functionality and automated smart registers.... This way you can still heat your floors independently..... by simply closing registers automatically.... in the floor where you do not want heat.... Now not that many people know about this.... simply because they chose to just have their duct work split in two.... but if you doing some sort of Airbnb house hacking.... then the solution that I provided is the way to go... Hope it helps.. good luck for more info go to studyguide.net/hvac
Thanks for the video but these settings are incorrect for the 3rd generation nest thermostat. You cannot set gas as the emergency heat, you can only set electric as emergency heat. If you change the setting to gas it will register as alternate heat. You can change the alternate heat temperature between 10-50f. (This temperature is when the heat pump will stop running and the system will switch to gas heat based on the outdoor temperature) or set the thermostat to run alternate heat only. With a dual fuel set up you will not have emergency heat listed as a mode/setting on the thermostat.
Thank you, this was confusing me so much. You answer a queston I've been trying to figure out for hours. I thought my system must have been wired wrong. Thank you!
Thanks as well. Now if I could only find a way to have it switch to gas instead of taking two hours using only the heat pump to heat the house from a 5* thermostat temp Drop overnight
My friend told me that someone put nest thermostat (not nest learning thermostat) for fan coil unit. it is not working for heat and high speed. Fan coil unit have 7 wire ( Y1,W1,R,C,G0,G1,G2) Google support tech suggest use Nest Learning thermostat. If I buy it then G connect High speed G2 , Y2 connect Medium G1 and (*) connect low speed G0. Am I right?
It's just a little confusing you say the W1 W2 is for your dual fuel auxiliary heat but then also the star terminal is for the dual fuel auxiliary Heat where would you wire the star terminal into. Thanks. Also Nest technical support is very nice but they are also very Clueless I feel like I'm talking to somebody that took an hour class on this thermostat and they're very helpful for a basic wiring and basic setup but when you get into the more intricate complex wiring such as dual fuel settings the balance points they have no clue what you're talking about
Usually you won't be using W1. You can use W2 for AUX; and * for Emergency heat (assuming there is a separate wire). My system was originally wired where AUX and Emergency wires are short, so they are basically the same thing, I only had to connect the AUX wire to W2.
Wont be buying this crap anymore..... After a year, all of a sudden no Internet connection. Rebooted, hard reset, still says " network maybe too far away" when its only about 6 feet away!! Done all the troubleshoot, Nest don't seem to bother, like all other corporates, take yer money and run attitude
Sorry but this man is terrible at explaining things in a way the average person would understand. Very confusing. Explain WHY the move from W2 to W1 was necessary and how the system reacts. Pretend you're helping NON hvac techs. Good grief.
I'm fairly confident at the 6:37 mark you may have accidentally changed the setting back to the original emergency from dual fuel! thanks for the vid man!
Very informative, makes a confusing issue easy to understand. THANK YOU!
I like the way that you explained this. Great job.
Very helpful. Thank you for the video. Easy to follow along and fixed my issue
Thanks guys!! You just saved me a few hundred bucks!!
Awesome man, you saved me $379 today. Thanks!
Thank you. Great video and well explained.
Helped a bunch thanks!
Hey Chuck... thanks for the demo!
Just had installed a heat pump with propane furnace alt heat.
This is the best explanation I’ve been able to find for wiring for this equipment... one question: when I view the equipment setup on the Nest Gen 3 and on the Nest app, it indicates 3 heat sources (1) heat pump heating (2) alt heating, propane furnace (3) 2nd stage alt heating, propane furnace. Also indicates heat pump cooling and, fan.
Both (W1) and (*) are connected to the same terminal on the air handler control board...
The indication of 3 heat sources caused me some trepidation at first because, I have only single stage propane furnace. But after thinking it through, I assume the second stage alt heat is what gives me emergency heat function when the outside air temp is above my 40 degree lock out set point?... is that your interpretation, as well?
Awesome ... just what I was looking for. I assume you also needed to tell the Nest that you moved the heating wire over (or it autodetected that).
Great video, thanks.
Good tips thanks :)
I understand your video. I currently have a duel fuel Heat pump/AC, and gas forced air system. However, my system has two additional wires (Red, Wight) total of ten wires for I believe the furnace power. Do I need to add a jumper wire? Exactly where?
Hey do yu have a wiring diagram for what you explained along with the furnace and heat pump?? Thanks!
Any reason you connected the alt stage 2 to the star instead of the W2? In the Nest Pro guideline setup it doesn’t show any wires connected to the star for dual fuel - one stage heat pump
Thanks had an issue when someone installed the wrong one in someone’s house now I see they built in the fossil fuel kits into the thermostat thanks for the video 👍
Hi my name is Albert from northern va, and I was wondering whether you can show the wiring on a ECM daikin gas furnace and a 14 seer single stage heat pump using the nest. Thanks you.
What happens to the second stage when the Internet or WiFi goes down? What does it default to?
My system doesn't have a enough wires for the * terminal. What should I do? I have electric air and heat with a heat pump and a zone system.
My previous thermostat was wired at w2. Should I moved my wire to w1 to match or leave it?
I Was wondering can you use the nest as a duel fuel system to use a wood burner boiler and a electric furnace as back up. I dont know much about this. And have some questions.
Can u do dual fuel when you have a stand alone heat pump and indoor air handler without heat strips. And have a oil forced hot water system with baseboard radient as ur back up heat?
My old termostat has a numbers. 1 red,2grey,3 orange,4 green. Could you please tell me which one goes where on Nest? Thank you
My nest thermostat keep reversing valve clicking when it off circle how do I fix that can you please help me , thank you
Where does the brown star wire hook up on the equipment.
Couldn't you just use W1 or W2 for your auxiliary heat dual-fuel why do you need the star terminal what does that get wired into
How do you know if it’s dual fuel or single fuel?
I have to replace my A coil, line set and out door 5 ton condenser. With LPG cost going up and down and issues with getting it. I am considering replacing the 5 ton with a 5 ton 15-Seer heat pump and a new A coil and new TXV. I'll also replace line set as I am moving the outside condenser over a bit. Question I like the Gas furnace and the heat, so I want gas heat most all the time. So which Thermostat and or items would be required for me to have total control of when or if the heat pump or furnace is give the command to operate. And if there are wrong or right heat pumps to get. My system is Goodman and it's been great. Looking at the GSX160601 and the CAPF4860C6 A coil. My furnace is a Goodman GMNT-120-5 92% LPG furnace. Suggestions from knowledgeable people have kept me alive so far so I am open, thanks, Ron
I have a very similar system, dual fuel, natural gas backup to heat pump, with a reversing valve. The wiring is almost the same as in the video except I have a brown wire connected to S1 for an outdoor temperature reading (thermistor/RTD). But from what I read the Nest does not use an outdoor thermistor. So, where does the brown wire attached to the * terminal in the video go to? If emergency heat, my emergency heat is the same gas furnace that is the auxiliary heat (would I jumper * to W1 or just ignore the * terminal). The Nest documentation says the * terminal can be used for humidifier, emergency heat or something else, but not an external temp sensor. Then how does Nest know the outdoor temp for determining whether to use the alternate heat or heat pump? If it relies on the internet, what if my internet or Wi Fi stops working? Thank you for the video. It really made me think before dropping $200 on the Nest.
You just tape that S1 wire, and not use it. And you don't jump anything on a Nest, you should ignore the * terminal - the reason is you don't have a separate wire for emergency heat. Nest knows the outdoor temperature by your location through internet. My system also has S1 and S2, which I simply left them out.
I wouldn’t trust outside temp that nest shows to control my heat... I would rely on multiple....factors to control the heat....
All my cables are the same as the one in video except the brown cable. I have white and black cable but then I have a blue one. My Cables are yellow, green, orange, red, white, black, blue. All in sequence. I needed help for installing the blue cable. Mine is dual fuel and live in a apartment with all electric.
You shouldn't rely on the colors only, but the standard is blue = common wire, which should go to the C terminal.
I like your video. I'd like to know how to set up a heat pump with a two stage furnace on a Nest Thermostat.
I have the Google nest 3rd gen too. And I just installed my new ac unit and it has a heat pump in it. Even though I kinda don't need it cause I have a forced air furnace. How would I wire it to the nest if I was to hook it up. I have my humidifier wired in and it uses the * and I seen where heat pump or duel fuel uses the * so I'm basically lost
Does the Nest Generation 3 thermostat do all the necessary modes..? No need for other accessories like a Bill Porter board, outdoor thermostat..? Can you show the wiring from thermostat to furnace to heatpump please
Can you help me with wiring a door fuel system with a humidifier
Hi, my old set has R, O ( a brown wire connects to it) , C (blue wire), Y, E/W1, and a jumper to W2, lastly there is a G. How to install it?
Hung yen Sung I have the same thing. Did you ever figure it out?
Go to the nest website and use the compatibility checker then if it's compatable you will get wiring digram
Hi Chuck, I have a dual fuel system, Lenox heat pump and furnace, and I saw your video. Could you show me where you connect the star terminal into the furnace/heat pump terminals?
Can you share the answer if he give it to you thanks
Do you have a video for wiring a wood furnace to work primarily over the heat pump, and have them sharing the nest? For example i would like to control both heat sources, with my wood furnace being primary and my heat pump being secondary, or rather to have it turn on if the furnace would go out? I would like the thermostat to control my blower fans on the wood furnace and an electric draft. Thank you for your insight.
Have you figured out a solution to your question? I have the exact same setup and trying to figure out the same thing you were trying to do!
@@austinbirk127 unfortunately no I have not
@@destinationunknown7913 thank you for the response. If I figure something out I'll be sure to get back with you.
Is this for auxiliary heat Because my heat pump is working fine with the nest thermostat but when the weather gets below 30° my auxiliary heat does not turn on
Very well , thanks
Where does the wire on the star terminal go in the furnace for dual fuel? What's the reason for hooking up to the star terminal? Does the star terminal do anything in defrost mode?
In my case, I presently have a 2-stage natural gas furnace and am using W1 and W2. I have no cooling.
I am going to add cooling via a heatpump now, which will give me cooling (Y1 and possibly Y2) and heat-pump driven heating.
So how do I (or can I) set up the 3 stages of heating in my Gen 2 Nest:
W1 - Heat Pump heating
W2 - Furnace-NG heating stage 1
W3 (*) - Furnace-NG heating stage 2
Is that the correct setup or not possible with the Nest?
have you got an answer to this? I believe I need to set mine the same. I have a heat pump and a 2 stage gas furnace
Short answer is.... just get different thermostats connect them to the heat sources, and as long as they support if this then that functionality... program them to come on.... without having to configure any nest settings. Hope this helps...
I use 3 thermostats one from Honeywell for heat pump controlling cool mode for and heat mode for heat pump.... and 2 thermostats (Nest) for tankless gas heater...
I use if this then that functionality to control both fuel sources.
I just had my home inspected and was told that my NEST was not allowing it to turn on the auxillary heat. How do I get it to do that?
how does first stage heat pump work with G on the furnace. My furnace only runs continuous fan at 25% which is not enough CFM for the heat pump heating? How do I get fan to run at full speed?
I just installed the nest thermostat on my heat pump. Condenser unit is not coming on at all. It won't shut off at all constantly running. Any suggestions. There was a jumper wire that I took off. No settings for heat pump
I take it that your nest thermostat is fine now seeing how it's been a year ago since your post. If you go to Nest website (maybe on the app also) you can talk to someone from Nest and give them information on what type of heater you have, if it's gas or electric and then Nest will send you your personal wiring diagram for your heating unit with the Nest thermostat. I do know that Nest doesn't use any jumpers for wiring any of their Thermostats.
hi
I have heat pump and hot water gas boiler ( my main heat is hot water radiator ) and can I connect heat pump and hot water boiler as same way that you did on this video and I don't want the fan comes on from heat pump when the boiler start heating up the radiators.
I have the same situation, did you ever figure out ? Thanks
I have the same situation. Heat pump for central AC, furnace for hot water base board heat. Does Nest E thermostat work in my case?
Sir, I am in Dallas Texas. I have a Nest Learning Thermostat (A0013) with a (Daikin) heat pump and just bought it (HP) because I got a GREAT Deal. I never wanted to use the heat Pump for Heat because gas is 1/3 the cost cheaper and is abundant. It cools very well. I continue to want to use the gas furnace for heat all the time and never engage the Heat Pump for heating. Do I need to TRASH this Thermostat for that to happen?
I have a dual fuel system, HP / LP. The wires I have are R,B,W,G,Y. Is it possible that the wiring to switch between heat sources is in the furnace, and not decided by the thermostat? If so, How do I set up my thermostat? still as a dual fuel or as a single fuel? Thanks.
where does the blue go?
Just purchased Nest Thermostat.
I built a new house with gas and heat pump. My old thermostat 5 wires: g, w,b,y,r. The first 4 wires match the new Nest. Where does the red wire go on the Nest.
Default for the RED WIRE is “RH”
Question, you said for a duel fuel system, the white wire should be moved from W2 Aux to W1. The wiring diagram Nest sent me said it goes on W2 Aux? I'm confused on where it should go. My system is an electric heat pump with gas back up. A little help please.
Great question! According to Nest - and I shall paraphrase page 19 of their Pro-Installer-Guide - but this is my answer to you:
From Nest -
For dual fuel, any wires inserted into the W1, W2/AUX, or *(if W3 is chosen) connectors will be treated as alternate heat that will be used instead of the heat pump when needed. Use Pro Setup to indicate the source (gas, electric, geothermal, etc) as well as the delivery mechanism (forced air, radiant, etc) for each W wires connected. The 2nd generation Nest Learning Thermostat supports two wires for alternate heat - additional alternate heat wires are not supported.
From me -
W1 or W2 can be used on single stage gas furnace. Both W1 and W2 are needed for a two stage gas furnace. The Nest Thermostat recognizes which W is used to configure the program.
Thanks!
So, I'm good on W2/AUX right?
If you have a single stage gas furnace as backup, I believe so.
@@anumber1air I saw that in the Guide and wondered why you moved your W wire from W2 to W1. According to the guide, in a dual fuel setting Nest should treat them identically(?)
Where does the star terminal hook up at the unit if w1 is for the gas heat. Makes no sense.
Ok so I am so confused, I have watched all the videos and none describe what I have. I have a AC/heatpump outside. But I also have a furnace downstairs that runs off oil. I only have 1 R wire on my old thermostat.
I have Y O G R C W E
Those are my old thermostat wiring.
In the nest, do I hook the E to the star and the W to the W1 on the nest to still have both my heatpump and my furnace as emergency after if gets below 35 degrees outside? Because right now, my thermostat runs off heatpump 35 and up and the oil kicks on at 35 and below.
Have you figured out a solution to your question? I have similar setup. I have a heat pump system with a fireplace furnace all in the same air duct of the house. Trying to figure out if its possible to run all off ones nest thermostat.
Do you know how to disable the heat pump I prefer using gas heat all the time the heat pump is expensive to run I have the 3 generation nest even nest, the tech at nest is having a problem with disabling it crazy how difficult it is, any suggestion would be appreciated .
Run it in emergency heat.
Very difficult... your best bet is to open up manual for heat pump... schematic diagram.... and see where each wire goes...
Did you ever figure this out? One tech told me I could simply unplug the O/B wire and it would run cooling-AC from compressor outside and W1/w2 for each stage of NG heating. Havent tried it yet though.
Why not just connect W1 as your alternate heat for dual fuel so you don't need to run an extra wire for the star therminal?
Hi if we have one unit for 2 story house and need to install 2 nest thermostat, how should we do that? We have itching split system or damper that control our 2 thermostats ...
Fatemeh fallah adl if you have a 2 story house that has one central heat pump air conditioning split system, then you will need to have only 1 heat pump nest or Honeywell thermostat that controls heat for both primary and secondary floors in a single location ( I have my heat pump thermostat on second floor and it controls both 1st floor and 2nd floor since ducts go to both locations.... first floor and second floor)
However, the trick is what you would do is make your heat pump/ac as the secondary source of heat.... instead of making primary source of heat....
Yes yes I realize that heat pump is cheaper to operate up to 27 to 40 degrees then gas.... but the problem is sometimes heat pump is simply not as comfortable from all the hot non humid air heating you... causing you allergies.... (unless of course you add humidifier in between the ducts...)...
Therefore what I would do in this circumstance this specific circumstance where you happen o have 2 floors.... is to simply have one thermostat for your heat pump..... that controls both floors with push of a button..... and also get your self 2 more thermostats such as Nest thermostats for example.... for your furnace/tankless water heater that heats your radiator pipes with water or steam.... (depending on what your 2ndary fuel system is... mine is tankless water heater that provides heat for both domestic water and radiator space heating....)
The 2 more thermostats would allow you to control your radiator heat....for each floor... because the chances are.... you most likely have multiple zones setup for your 2 story house for your radiator pipes.... and therefore if that’s the case then you most certainly will want to use your gas heat source of tankless water heater.... as the primary fuel source vs heat pump.....
Why? The reason why is because you want to control each floor separately... and use heat pump in the event of emergency.... such as when for example your tankless water heater breaks.....(mine broke the other day... 3 way valve was broken causing radiators not to heat.... boy was I glad that I had heat pump as backup for both of my floors...)
Now the question is.... how do you control all the thermostats automatically... I imagine this is your question.....
In my case I have total of 3 thermostats.....
1 to control heat pump.... (Honeywell.... not best....) and another 2 (nest.....)
I use 2 nest thermostats to control the heat from radiator gas source.....
I use Honeywell for controlling heat pump...
Now you may ask.... but how... they from different vendors....
Yes indeed they are....
I use concept of If This Then That..... for nest and for Honeywell thermostats.... without going into any rigorous settings of a single vendor....
In if this then that settings I simply configure.... Nest to hold temperature at 73 degrees for my radiator heat.... at all times and to only turn on heat pump if and only if temperature drops in my home below 70 degrees.... (in circumstances when my tankless heater breaks for example....)
So does the temp ever drop below 70? Well yes if it’s very cold... and if it’s very cold and temp can’t be held at 70 that means you must likely have a leak in your window.... (in which case I highly recommend insulating your Windows....)...
Sometimes though.... someone may have opened the window on purpose... then yes your heat pump would turn on..... unless you put sensors on windows and connect them to if this then that..... functionality and not turn on the heat pump if the windows are opened.....
Now sometimes.... I simply want heat pump to Quickly turn on...... but turn on when I get closer to home..... within approximate 10 miles from home....
Then once again I use if this then that function to turn on the heat pump..... or gas tankless water heater.....
Heat pump makes the whole house hot fast vs radiators..... a lot faster....
I use Alexa to control my heat pump and tell Alexa to turn it on using voice....
I also inter-combine my ceiling fan with Alexa as well... and heat pump and gas for maximum comfort in the time when I want some air circulated in my house....
Seems confusing? I know.... if you are confused... you can always get one heat pump for one floor and another for another floor and separate your duct work.....
Of you can just keep the duct work the way it is.... but put automated smart registers.... to control the flow of air..... to your first floor and 2nd floor.... and use yes one thermostat only.... in combination with if this then that functionality and automated smart registers....
This way you can still heat your floors independently..... by simply closing registers automatically.... in the floor where you do not want heat....
Now not that many people know about this.... simply because they chose to just have their duct work split in two.... but if you doing some sort of Airbnb house hacking.... then the solution that I provided is the way to go...
Hope it helps.. good luck for more info go to studyguide.net/hvac
Thanks for the video but these settings are incorrect for the 3rd generation nest thermostat. You cannot set gas as the emergency heat, you can only set electric as emergency heat. If you change the setting to gas it will register as alternate heat. You can change the alternate heat temperature between 10-50f. (This temperature is when the heat pump will stop running and the system will switch to gas heat based on the outdoor temperature) or set the thermostat to run alternate heat only. With a dual fuel set up you will not have emergency heat listed as a mode/setting on the thermostat.
Thank you, this was confusing me so much. You answer a queston I've been trying to figure out for hours. I thought my system must have been wired wrong. Thank you!
@@JimmyJimJimJames Thanks for letting me know, I’m glad I could be of assistance.
Thanks as well. Now if I could only find a way to have it switch to gas instead of taking two hours using only the heat pump to heat the house from a 5* thermostat temp
Drop overnight
My friend told me that someone put nest thermostat (not nest learning thermostat) for fan coil unit. it is not working for heat and high speed. Fan coil unit have 7 wire ( Y1,W1,R,C,G0,G1,G2) Google support tech suggest use Nest Learning thermostat. If I buy it then G connect High speed G2 , Y2 connect Medium G1 and (*) connect low speed G0. Am I right?
It's just a little confusing you say the W1 W2 is for your dual fuel auxiliary heat but then also the star terminal is for the dual fuel auxiliary Heat where would you wire the star terminal into.
Thanks. Also Nest technical support is very nice but they are also very Clueless I feel like I'm talking to somebody that took an hour class on this thermostat and they're very helpful for a basic wiring and basic setup but when you get into the more intricate complex wiring such as dual fuel settings the balance points they have no clue what you're talking about
Usually you won't be using W1. You can use W2 for AUX; and * for Emergency heat (assuming there is a separate wire). My system was originally wired where AUX and Emergency wires are short, so they are basically the same thing, I only had to connect the AUX wire to W2.
WHAT IF MY SYSTEM DONT HAVE THE * WIRE
but we love it :)
The screen says fan don't activate and you repeat 3 times fan don't activate......wow
How can I call you I will pay you for your time.
Hey mr air conditioning!!!
Wont be buying this crap anymore..... After a year, all of a sudden no Internet connection. Rebooted, hard reset, still says " network maybe too far away" when its only about 6 feet away!! Done all the troubleshoot, Nest don't seem to bother, like all other corporates, take yer money and run attitude
Sorry but this man is terrible at explaining things in a way the average person would understand. Very confusing. Explain WHY the move from W2 to W1 was necessary and how the system reacts. Pretend you're helping NON hvac techs. Good grief.