If both W1 and W2 connectors have wires it means that you’re running a dual fuel system. Instead of a heat pump with a capacity of 18,000 BTU/hr (1.5 ton), let's put in a heat pump with a nominal capacity of 30,000 BTU/hr (2.5 ton). No matter which setting you choose, Heat Pump Balance monitors how efficiently your heat pump is working, the current weather, and the weather forecast to determine how often to use expensive AUX heat and how to best use it in the future. If it isn't, you can use Early-On which is a similar feature, but your thermostat won't take specific measures to avoid expensive AUX heating. Anna Middleton Read more May 28, 2019. If the heat pump ices over, AUX heat will kick in more often, in order to compensate and raise the temperature to the desired levels. I have a train XL 14 I heat pump system with auxiliary electric coils. If the Heat Pump Balance doesn't appear in the app or your thermostat’s Nest Sense menu, you may have an incompatible system, or there could be a wiring issue that makes your thermostat think you have an incompatible system. Your email address will not be published. Stay tuned with our weekly recap of what’s hot & cool. You should verify that the X wire on the old thermostat is not a common wire. I am having the same problem. The next step is setting the minimum and maximum temperatures that the Nest should heat or cool your house to when you’re away. Tap Settings . Just thinking through this, you should be able to see that more capacity will result in a lower balance point. Select Emer. For example, if your AUX lockout temp is 40ºF or 4.4ºC, then AUX heat will come on when the outdoor temperature drops below 40ºF or 4.4ºC. Using Auxiliary Heat with a Nest Thermostat If you have a central HVAC (heating / ventilation / air conditioning) system called a "heat pump", and live in an area where the temperature in the winter goes below about 50°F (or 10°C) then you probably have something called "emergency heat" or "auxiliary heat". Sometimes, the “Heat Pump Balance” option may be missing in Nest Sense. Some heat pump installations may have the auxiliary heat connection labelled as X, W1 or W2 on the thermostat. Report Save. How early your system will start heating your home is determined by Heat Pump Balance. If you don’t have a wire in the W2/AUX connector, you don’t have AUX heat. Disclaimer: Some pages on this site may include an affiliate link. You can change it from the Nest app or from your thermostat. Note: Normal programmable thermostats have one way to control AUX heat: the AUX lockout temperature. You should verify that the X wire on the old thermostat is not a common wire. Select Emer. Last edited by PJmax; 12-04-19 at 09:59 PM. My Nest now does only heating… so it’s Ok, but if it ever dies… an Ecobee. Your Nest is physically detecting a Y2 wire but not a Y1 wire that is required for 2 stage conventional cooling systems or 2 stage heat pumps. Smart thermostats are not only convenient, but they also come with a handful of settings that can potentially save you money. I’d do it again too. Turn the ring to scroll through the different options and press the ring to choose one. We are experiencing longer than normal wait times for support. The most common type is forced air heating, which will be the first option. These thermostats are required to be compatible with all standard fuel types including, oil, natural gas, electric power, and dual fuel. Known as Heat Pump Balance, it allows you to choose how much auxiliary heat to use, which is handy since such heating options can be expensive. Pull off your thermostat’s display. Heat Pump Balance lets you select a level of comfort and energy savings that you like: more comfort, more savings, or a balance between the two. Push to continue. Nest Sense gives you plenty of control over your heating system. So what I’m assuming is that Early On would have been the original setting that helped heat pumps keep up with overnight heating, while Heat Pump Balance is the newer version of Early On specifically for systems with heat … This allows Nest to know if the Heat Pump is the least cost way to heat at any given time. AUX heat can turn on when the heat pump alone isn't working fast enough, it's too cold outside, or your heat pump needs to defrost. Nest 3rd gen model will turn ON the aux heat system only when it is necessary (only when the outside temperature falls below the aux heat lockout temperature). Nest – Smart Thermostat for Heat Pumps. An efficient system won’t need to use AUX often, while an inefficient one may need to use AUX to keep your system heating even if you choose Max Savings. To use Heat Pump Balance, your thermostat must also be connected to Wi-Fi. Note: Use the Home app if you have a Nest Thermostat. I would like my Nest to be intelligent about which it uses to heat the house. Choose Settings . It will still work properly but you won’t be able to use and configure the “Heat Pump Balance” feature. This means that with the exception of unfortunate, unforeseen external interference, you can avoid using AUX heat to hit the target temperature all winter long. I’d do it again too. Most modern heat pump systems can hold their own own down into the 20s. Put this wire in the Nest Thermostat’s * O/B connector. I think I need to access the pro set up and change from a dual fuel to a single fuel. Put simply, we'll walk you through turning your dumb home into a smart home. Depending on your system’s equipment, not all options may be available. Close. Once you're sure, you can assume that the X is the auxiliary heat and should be inserted into the AUX/W2 connector on the Nest Thermostat Google Nest geothermal heat pump thermostats are designed with the purpose of working with most 24V systems and even older systems. Nest – Smart Thermostat for Heat Pumps. Original Poster 3 years ago. • If there’s a white wire in the connector labeled both W and O/B, then you probably don’t have a heat pump. Your system can use AUX heat to help keep you comfortable in harsh weather or to help change the temperature in your home quickly. If you're a night owl, the Nighttime Heat might appear on your Nest thermostat and in the app. Wiring Diagrams : Nest Line Voltage Thermostat Nest And, size: 800 x 600 px, source: www.sconseteer.com. If you live in colder states with harsh winters, the outside temperature can mess with your heat pump. After I realized there was no heat pump balance option I set it up as auxiliary heat and it works great. Air-source heat pumps work on a novel principle: instead of directly producing the heat that you need to keep warm through the winter, the heat pump will find heat energy in the outside air and bring it into your home, using refrigerant as the medium of heat exchange.. Once you're sure, you can assume that the X is the auxiliary heat and should be inserted into the AUX/W2 connector on the Nest Thermostat Tap Heat Pump Balance. When this happens, your thermostat has calculated that it can save energy by temporarily increasing the temperature in your home slightly while you sleep so it can get to your morning temperature using less (or even no) AUX heat. Because AUX heat is so expensive, running the heat pump longer can be cheaper than using AUX heat. If you can’t find your phone you can always make the same changes by using your thermostat. Enter your e-mail below and we'll send you our best tips weekly for the Echo, Google Home, and more. So heat pumps are sometimes paired with powerful AUX heat, which is much less efficient but can heat your home quicker. So close! Nest Thermostat: https://amzn.to/34kKVigIn this video we teach you how to wire a Nest Thermostat with a Heat Pump. Posted by 3 years ago. If it’s a heat only system, Nest won’t show any cooling options. How early your system will start cooling your home is determined by Early-On. Keep in mind that no matter which setting you choose, how much AUX you use ultimately depends on the efficiency of your system. Select Heat Pump Balance then choose the setting you want. But, I don’t have a pro set up ID number. We appreciate your patience and understanding during this time. If the walls of your home are too cold and your heat pump is not powerful enough, AUX heat may be needed in order to make up the degrees. 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