On my system, they are set as follows: Option 08 = Of Option 09 = 45. Short for auxiliary heat, this system is designed to heat your home up quickly instead of waiting for the cold heat pump on the exterior of your home. I control that temperature through my WIFI Thermostat. Your auxiliary heat will kick in on its own when it’s needed by your heat pump (provided your heat pump’s in good working order, which can be ensured by annual checkups and maintenance)––you don’t have to give it a thought or switch anything over on your thermostat. Yes, Logic Option - No Sensor Required or Outdoor Sensor Option - Outdoor Sensor Provides Outdoor Temperature Setting to Lockout the Heat Pump and Switch to Gas Heat Heat Pump Auxiliary Lockout Control - Outdoor Sensor Option Outdoor Sensor Provides Outdoor Temperature Setting to Lockout Auxiliary Heat Remote Sensor Options 1 Indoor or Outdoor Power Source Battery, Hardwire, Power … Note: Normal programmable thermostats have one way to control AUX heat: the AUX lockout temperature. If temperature is not reached in a reasonable time, set the upstage timer (Function 0346). The thermostat is set to 70 degrees. Any suggestions? What does aux heat mean on a Honeywell system? With heat pumps, it's best to set the temp you want and leave it alone. My best advice is to find another tech. Most heat pump thermostats bring on the back up heat when the temperature difference between the room and that thermostat setting is 3 degrees or more. The Lockout temperature is set lower than usual but not to the lowest setting. As the name indicates, auxiliary heat, or emergency heat depending on your system, is just a secondary heat source. Now this 'COMP TO AUX DELTA' option is asking for how many degrees the indoor temperature should drop before using the auxiliary heat. Why does my nest say aux heat? The thermostat shall have a compressor outdoor lockout and backup heat outdoor lockout to turn off the heat pump or backup heat based on outdoor temperature. 367. Do not switch to emergency heat when the outdoor temperatures dip below 35ºF––your auxiliary heat will automatically step up to supplement your heat pump. If ice starts to build on your heat pump’s outdoor unit, your heat pump will undergo a “defrost cycle” to melt it. Auxiliary Heat Lockout must be set to ≤ 35 degrees to meet specification . As we mentioned above, heat pumps absorb heat from the outdoor air and then move that heat indoors. And if you do find yourself in the position of needing to use your emergency heat, turn it on, but then call one of our Beach Air technicians to come out to service your heat pump. Just contact us and we’ll send one of our Phoenix techs right over. If so, that’s normal. Many homeowner misuse this setting more than any other. I would like to change my heat pump balance point so that the heat pump isn't used once the outside temperature drops below above 40F. Hopefully this article has helped answer that question, and any others about heat pump temperature ranges, and what you can do to improve heat pump performance when it gets below 25-30 degrees. We have a heat pump and recently installed an ecobee thermostat. Will start soon This threshold is known as lockout temperature. There is a setting in your "thresholds" section that you can change; most likely it is set to default at the moment which relies on the feedback of your heatpump system and how long it takes to warm up the home. Monday, February 15(Ontario Family Day)9 a.m. to 9 p.m. EST. 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). It does seem to be kicking in frequently instead of normal heat and got an alert that my "Aux Heat was running for more than 180 minutes". When that happens, the heat pump will reverse the flow of refrigerant so that hot refrigerant is sent to the outdoor unit (to melt the ice). d. Balance point/auxiliary heat lockout plus 2° droop. c. Auxillary Heat Lockout (strip heat lockout) must be set to "35" or lower to meet PTCS specification . mommom1 . Your Duplicants, your plants and your items will suffer and break if their temperature is too high or too low. ...The temperature outside is below 35° Usually, once outdoor temperatures fall below 35°, a heat pump will struggle to keep your home warm and will automatically switch to AUX heat. Note: In some cases, your heat pump’s AUX heat could be a gas furnace, but since Phoenix typically has mild winters, some AZ homeowners will have electric resistance as their AUX heat. The heat pump mode is operating but can not keep up. Let’s say it is 28 degrees outside, the heat pump is running 100% as designed, the home is maintaining 72 degrees and all the heat made so far is cheap heat. The idea of heat pump control is to use the most economical heat source first, and the auxiliary heat source, usually electric resistance heat, only when the heat pump can’t handle the load. Now I keep on getting alerts that the Aux heat is running. Dual fuel and aux heat lockout with outdoor sensor or Internet weather. December 11, 2017. Auxiliary heat is allowed to operate whenever sufficient demand for heat is available. For example, if you use 20f as the Aux Lockout setting, auxiliary heat will not be able to engage unless the outdoor temperature (per the thermostat's outdoor temperature sensor) is below 20f. My question is, is there a way around this to actually set the lockout temperature? If your AUX lockout temp is 40°F/4.4°C, then auxiliary heat will come on when the outdoor air temperature drops below 40°F/4.4°C. Up to 3H/2C Heat Pump systems or up to 2H/2C Conventional systems. During this time, the system will rely on AUX heat to keep your home warm. heat pump will operate - default 50°F (10°C) high. In fact, electric resistance heating is about 50% more expensive than heat transfer. Upvote #2 12-09-14, 01:54 PM K. ksefan. On: Fan runs continuously. Please Note: if OAT is less than Auxiliary Heat Lockout temperature setpoint the auxiliary heat may engage e. Each test wil l run for a maximum of 60 minutes or until manually terminated : f. Wait at least 10 minutes before taking static pressure readings and inserting flow plate for TrueFlow plate In most cases, lockout temperature is 40ºF. As we mentioned above, heat pumps absorb heat from the outdoor air and then move that heat indoors. If you use the lowest setting, chances are your AUX heat won’t kick in anymore and the notification will be gone. First off, this means you have a heat pump (more on that in a moment). With Heat Pump Balance, you don't have to worry about the AUX lockout temperature. The reason for this is that a heat pump does a very good job of maintaining temperature, but is very poor at recovering temperature. Our suggestion would be to reach out to a professional as soon as possible. EM heat is an option on your thermostat that you can manually turn on to activate backup heating. 346. Secondly, it means the outdoor temperature is too cold, so your heat pump is using “backup” heat to heat your home. Either of these can be set to Off, or from 5-55F in 5 degree increments. 35), the compressor is locked-out and ONLY the auxiliary will run when the outdoor temp drops below the specified temp. If outdoor temperature is in-between the high and low balance point, both the heat pump and auxiliary heat sources can operate. Heat transfer is the most efficient (and cheapest) type of heating, and it’s your heat pump’s main solution for heating your home. 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. And if not, what's my best alternative? So you were wondering, at what temperature is a heat pump not effective? Which is 1.5 to 2 degrees lower than thermostat set point - the electric heat or auxiliary heat would then come on to make up the temperature difference. The optimal heat pump temperature range is above 25-30 degrees Fahrenheit. In many heating systems, auxiliary heat comes ON when the outdoor temperature drops below a certain threshold. This is when the outside is around 35-40 degrees and the indoor temperature is around three degrees cooler than the thermostat setting. For example, let’s say that you wake up to a cold home (62° F) and immediately raise the thermostat to 68°. Pssttt...if you live in Phoenix or surrounding areas, we can help you determine what’s wrong with your heat pump and fix it. Your heat pump absorbs heat from the outdoor air via refrigerant lines and carries that heat inside where it’s used to heat your home’s air. Although this situation is rare in Arizona, it’s common in colder parts of the country. Temperature management is one of the key challenges of the game. This is typically caused by one of three factors: when it’s below 35° outside, you’re trying to heat your home by 3° or more, or your heat pump is in defrost mode. This way, the aux heat can engage if you have a system lockout, and keep the house from freezing. Auxillary Heat implies that you have an Air Source Heat Pump. However, when the outside temperature is 32° F or below, your auxiliary heat will usually turn on automatically. Need more help? “0” means that the auxiliary heat lockout is disabled. Ventilation control with ERV/HRV or fresh air damper. The two different names refer to the same thing: an electric heating system Option 08 —Auxiliary Heat Lockout Temperature This selection is available on heat pump systems with a valid outdoor temperature sensor connected. Join Date: Dec 2014. Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. At temperatures above lockout, the system operates like non-restricted mode. Final Thoughts: At What Temperature is a Heat Pump Not Effective? The Emergency Heat setting should only be used when the outdoor unit of your heat pump system is not working properly. Generally, heat pumps work by transferring outside heat into your home via a process called heat transfer. In this option, please select what you find best fits for you. If it is not set to “0,” the setting number displayed is the temperature in degrees Fahrenheit that the compressor lockout is set at. Option 2: (Droop Control with Aux Heat lockout): Compressor works only above auxiliary lockout temp, backup heat works only below balance point, 2 degree droop between temperatures. AUXILIARY HEAT LOCKOUT Above the selected temperature, auxiliary heat will only run during defrost operation. Cool Setpoint: The warmest temperature that the space should rise to before cooling is turned on (without regard to deadband). Auxiliary heat (Only for heat pumps with auxiliary heat) Low battery Temperature setting warning Display screen Press the FAN button to select: Auto: Fan runs only when heating or cooling system is on. Synopsis module residential; class house { double aux_heat_temperature_lockout[]; } object house { aux_heat_temperature_lockout value; } Remarks. The heat pump lockout temperature can be used to force a switch from heat pump operation to auxiliary heating. should I use the aux heat and lockout the heatpump. Impossible to know though since the documentation is sparse. For example, let’s say that you wake up to a cold home (62° F) and immediately raise the thermostat to 68°. Aux Reverse Staging: With this setting enabled, you will also need to enable the Aux Heat Stage 2 Temperature Delta threshold setting listed above and set a temperature value. Auxiliary heating is provided by a Fuel Fired Booster Heater (FFBH), which boosts the temperature of the coolant supplied to the heater from the engine. HOWEVER, as we also mentioned above, electrical resistance heating (AUX heat) is more expensive than heat transfer. If outdoor temperature is below the low balance point, only auxiliary heating will operate - default 25°F (-4.0°C) low. If it gets colder outside than the set lockout temperature, your heat pump will use AUX heat. The thermostat shall have a compressor outdoor lockout and bac kup heat outdoor lockout to turn off the heat pump or backup heat based on outdoor temperature. To be safe, disable the Aux Lockout if you go away. Auxiliary heat lockout with outdoor sensor or Internet weather. As we mentioned above, AUX heat usually costs up to 50% more than heat transfer, which means if your system is running on AUX heat when it shouldn’t be, your heating bill is likely going to be a lot higher than you’d like it to be. Note: Normal programmable thermostats have one way to control AUX heat: the AUX lockout temperature. If for some reason you wanted your heat pump to switch to AUX heat when there was a 1-degree difference or a 5-degree difference, you’d need to hire a professional to change the temperature differential on the heat pump board of the condenser. The outlet temperature with and without Aux heat depends on outdoor temp, wattage of electric heat strips and CFM setting. This is an outdated page. If your AUX lockout temp is 40°F/4.4°C, then auxiliary heat will come on when the outdoor air temperature drops below 40°F/4.4°C. Auxiliary heat is less energy-efficient than your heat pump, and it is meant to only run for … The auxiliary heat would kick in at this point to help maintain the temperature in the space. aux_heat_temperature_lockout is one auxiliary… We know you have questions, so below we’ll go into more detail about: First, let’s take a closer look at how your heat pump works. The TH8321 Thermostats provide temperature control for gas, Below, we’ll look at the situations in which your heat pump is unable to heat your home via heat transfer (and may need to use AUX heat). To also avoid short cycling and increase equipment efficiency, you can go to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > ​HEAT DIFFERENTIAL TEMP > and change this to a higher value so that the system turns on for a bigger temperature drop and reduces short cycling. I live in Pittsburgh Pa. temps are getting to be around 14 degrees with colder wind chill factors...earlier this yr with the help of 2-3 folks on this forum I purchased a 3.5 trane heat pump and airhandler and also a tcont800 series touch screen thermostat I think everything went well. Here’s how it works. Option 09 - Heat Pump Lockout Temperature. The auxiliary heat (electric resistance heat, or back-up heat) is minimized since it is more expensive. The ecobee will run the second stage of your aux heat if the current temperature is greater than the value designated in the Aux Heat Stage 2 Temperature Delta setting. REVERSING VALVE SHIFT DELAY Limit excessive noise in and out of a defrost cycle. Selectable from 0° to 40°F or off*. If the units wired correctly emergency/auxillary heat will come on when the heat pump goes into defrost… it will send a signal to the white wire back to the air handler to energize the relay for the electric heater. EM heat is NOT the same thing as AUX heat: AUX heat signifies that your heat pump has automatically switched over to backup heating because temperatures are too low. 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. Selectable from -10° to 35°F or off*. George Brazil Air Conditioning and Heating provides the Phoenix area with, usually costs up to 50% more than heat transfer, How your heat pump works (AUX heat vs. “normal” heat), When it’s okay for your heat pump’s AUX heat to be on, What do do if your AUX heat is on and shouldn’t be, Steam and/or water coming from the outdoor unit, The fan in the outdoor unit has stopped running, A blinking light on the unit to indicate it’s in defrost mode (only on some heat pump models). Balance ” means that the AUX heat and lockout the heatpump above an installer outdoor. Questions are, what SETTINGS for heat is allowed to operate whenever demand!, and keep the house than the thermostat setting AUX heat when the temperature!, this means you have an air source heat pump not Effective why may. The name indicates, auxiliary heat must come on to activate backup heating the.! 50°F ( 10°C ) high on that in a moment ) to come on to assist degrees and just the. 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