Click to see full answer. Accessories – Pumps, Cooling Towers, Evap Condensers, etc, Components – Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Welcome from the Editor & Electrical Forum Rules, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. Nest – Smart Thermostat for Heat Pumps 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). Last summer I installed a customer supplied Nest thermostat. Post photos, respond to polls and access other special features. The more reliable way is probably to use the “–serial” argument, as this would be tolerant if nest ever changes the ordering of the thermostats in the list. The Thermostat belongs to me. In this video we go over the heat pump balance feature in the programming of the NEST thermostat. But on the Nest Thermostat itself, the term "Lockout" is not used, instead you see "Use the heat pump compressor when the outdoor temperature is above". Basically automation is part of a subject called control systems. These features provide homeowners with increased control of their home’s heating and cooling energy usage. In other words if your aux lockout doesn't go lower than 40 degrees then your compressor lockout is set at 30 degrees. There is a 10 degree dead zone between the aux lockout and compressor lockout. I have just begun using the new Device Access API, and I find the list of traits returned for the Nest Thermostat to be extremely limited compared with what Nest provided when I purchased my Thermostat before Google took over. Connect your Nest Thermostats, Nest Cams, Nest Doorbell, or Nest devices and add Nest … Make sure the temperature is set higher than the Inside temperature. The compressor is a kind of “refrigerator” that dehumidifies and cools your interior. I’ve been seeing more Wifi issues recently with my Nest thermostats. Nothing could get the fan to turn in other than heat mode. There are two different lockout temperatures that are set on the Nest. Manual will be automatically added to "My Manuals", nest Learning Thermostat Installation Manual, Thermostat nest Learning Thermostat Installation Manual, Thermostat Nest Learning Thermostat Installation Manual, Thermostat nest Learning Installation & Configuration Manual, Thermostat nest Learning Thermostat D3 Installation Manual, Thermostat nest Thermostat E Installation Manual, Page 10: Wiring Diagrams: Conventional Systems, Page 14: Wiring Diagrams: Heat Pump Systems, Page 16: 2 Stage Heat Pump (Aux/Emergency Heat), Page 17: Wiring Diagrams: Humidifiers And Dehumidifiers, Page 21: How Do You Configure Special Systems, Page 26: Wiring Error Quick Reference Guide, Page 33: Quick Troubleshooting Reference Guide. After I installed the stat I ran it through the modes to make sure it would function. What does compressor lockout mean? The system seems to be running the heat pump down to the teens or below and when the unit ices up it must be running in reverse to try to de-ice. Participate in over 40 different forums and search/browse from nearly 3 million posts. I don’t see a pattern to the problem, and it seems to randomly affect all of them (sometimes at the same time, but often just one). But on the Nest Thermostat itself, the term "Lockout" is not used, instead you see "Use the heat pump compressor when the outdoor temperature is One minor point regarding the base serial number you mention that you said isn’t correct. Maybe on anything but a Nest. One is to use the “–index” argument. Ask Our Pros-Owner Assistance - NO DIY advice will be given. No problems with heat or cool until this morning. The temperature below which you want to use Auxiliary heat (rather than the heat pump compressor) is referred to as the "Compressor Lockout" setting in the website and app interfaces. The aux heat wire is connected to W2 Aux. 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The #1 question asked by NEW MEMBERS. In modern days where automation has reached the residential and is no longer the norm of only industries and factories there are certain terms or technical jargon that people still struggle with. The lockout temperatures are only enforced when the Nest Thermostat is connected to Wi-Fi so it can track outdoor temperatures. So lets say Balance point is 25* F and Compressor lockout is 5F*, then: Above 25*F Only Heatpump stage 1 and 2 can run, Aux heat will not engage to help meet temperature setpoint. • Compressor protection feature is engaged. Yes... we are 20 years old. Thanks for sharing these details and I'm sorry to hear you've been experiencing issues with your Nest Thermostat. Some decisions for some systems are made based on outdoor temperature (heat pump Compressor lockout, heat pump Emergency heat lockout, Window frost protection, ventilation lockout) and, if connected to Wi-Fi, the thermostat will pick up outdoor temperature and humidity from the internet. Sign in to the Nest app in your web browser with your Google Account or non-migrated Nest Account. Units might come with a switch that automatically shuts the unit down when a home or other structure reaches, or drops to, a certain temperature. AFAIK, the Nest only supports WIFI outdoor temps over the interweb. Compressor lock-out switches are also sometimes used in heating and air-conditioning devices. than the heat pump compressor) is referred to as the "Compressor Lockout" setting in the website and app interfaces. It is on a split system Trane heat pump. OK, thanks. By default Nest will activate the heat pump balance, which then automatically determines the aux heat lockout temperature. The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER. Help online: http://support.nest.com/certified, Nest Certified Professional support: 1-855-VIP-NEST (1-855-847-6378). Compressor lock out temp is calculated by Nest and outdoor temp, but seems set to 40F (cannot be changed). Components – Coils, Heaters, Motors, etc. Our 20th year anniversary is May 21, 2020. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. If the Nest is set to operate in the Airwave mode, the compressor gets turned OFF but the fan continues to keep running and dispersing cooled air. By default, Nest will lock out the Setting compressor and auxiliary heater when the outdoor temperature is above 50°F but will not lock out auxiliary lockout temperatures the compressor at any temperature. Both options are untested, as I only have one nest. You can view them via the “Settings->Technical Info” menu on the Nest itself or … I have a NEST thermostat and for some reason it is not turning on our air conditioner. I remember the earlier Nest stats (version 1 or 2), would not allow you to lock out the back up heat very low, maybe 50 degrees or so. ... For instance, you'll see the Nest Leaf to let you know that you've selected an energy-saving temperature. I had Nest support go through this with me and he just went off "Nest Sense" and to manual system where I set the compressor lockout … Hours: 5am-9pm (pacific), 8am-midnight (eastern). It seemed to work fine. Nest uses wi-fi only and gets the outdoor temp from the nation weather service which gets the temp from the local airport. There are two serial numbers for each Nest – one for the base half and one for what I assume is the LCD half. I've had my Nest for 2 years now and generally it does what I want. It squeezes the refrigerant from your unit and raises its pressure and temperature, thus pushing out to cool the air in your unit. Otherwise it has no idea when to keep the backup heat from coming on. The nest itself switches to away mode when I tap the “Present” button, but the button does not toggle in the app, and pushing the button again does not switch the Nest back to home mode. With this extreme cold, however, I've hit a problem. My settings were just to monitor and adjust as the system worked in various temps. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. Smart thermostats have many advanced features that include internet connectivity, downloadable energy tools and access to weather data. What you would have to do is fool the thermostat and tell it that you were a few hundred miles south of where you really were. Last night I was awakened by what sounded like the compressor getting ready to explode. I’ve provided two ways to do it. GoogleNestDataFields1. If Wi-Fi is not enabled, Auxiliary heat will come on automatically when it takes longer than expected to reach the current target temperature Wait 5 minutes for the system to restart safely, without damage to the compressor. For heatpump systems, its also crucial to know and set the minimum outdoor temperature that the heat pump can run with - otherwise the thermostat will lock out the heatpump and change over to aux heat as the weather outside will be too cold to run the heatpump unit that's sitting outside. • … Scroll to the right and select “Lock”. Welcome to Grainger Branch #232 in Madison Heights,Michigan. GitHub Gist: instantly share code, notes, and snippets. The second is the heat pump lock out temperature, when the location is below this temperature, it will not use the heat pump, and just use Aux. High balance point is the temp at which you don't need the aux heaters to help the heat pup maintain set temp. # 7 Heat pump compressor lockout temperature? http://hvac-talk.com/vbb/showthread.php?t=1241, http://hvac-talk.com/vbb/showthread.php?t=116113. The first is the Aux lock-out temperature, when the location is above this temperature, it will not use Aux. Overheating caused ... Snowflake and Flame are displayed (flashing) if the thermostat is in lockout mode to prevent the compressor from cycling too quickly. Could be 15, 20, 24 degrees F etc. If you want to be able to keep the compressor running and lock out the backup heat, you need the wi-fi so that the thermostat will "know" the outdoor temperature. When it is damaged, it will … Therefore, the thermostat is likely to sense that the room is already cool and will turn the AC OFF. I bought it after researching its capabilities, including the data available. Add a PIN From the Nest Thermostat To set up a passcode right from the Nest Thermostat itself, start by pushing on the unit to bring up the home screen main menu and select “Settings”. Compressor Damage. 1 Like seannymurrs (Sean Murray) November 5, 2014, 12:31pm Select “Lock” when … For example, “–index 1” to use the second nest. Lock out or Reset. The idea is that you have a control parameter(in our case temperature) and […] That actually worked to keep the compressor running into lower temps. 6 Indicates a malfunction with the system. There may be one or more loose wire connections in … Heating or cooling system does not respond • Touch SYSTEM to set system to Heat. Get contact info, branch hours, directions, and find out whats happening at the branch. 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