Installer Setup (ISU) Installer Setup ISU # Name Settings Default Notes 3120 Backup Heat Fahrenheit: This ISU is used to lockout the auxiliary heat Lockout when outdoor temperature is above this 5° F to 65° F (in 5° F setting. Just leave your thermostat’s setting on Heat, and let it do its thing. 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 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. What this means, unfortunately, is that it’s more expensive than the conventional heat provided by a heat pump. 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. Auxiliary Heat Lockout must be set to ≤ 35 degrees to meet specification . Heat pumps work most efficiently when maintaining a temperature. For example, with an auxiliary heat lockout of 40F, only the compressor will run above that temperature. Heat transfer is the most efficient (and cheapest) type of heating, and it’s your heat pump’s main solution for heating your home. Auxiliary heater Part #: 7E0963273A Component: STH-T5GP2 Coding: 4101 (hex) Fault codes: 00056 Blower engine for temperature sensors inside (V210) 00002 Transmission Control Unit 00057 Actuator shut-off valve b-column and floor space, right (V211) 00135 Left Front Wheel Acceleration Sensor (G337) I think that the fault code descriptions may be wrong, especially the 00002 … If outdoor temperature is in-between the high and low balance point, both the heat pump and auxiliary heat sources can operate. For example, let’s say that you wake up to a cold home (62° F) and immediately raise the thermostat to 68°. Note: Normal programmable thermostats have one way to control AUX heat: the AUX lockout temperature. For some homeowners, the “AUX” heating source will be electrical resistance heating, which are essentially large wire heating elements that are heated by electricity. I control that temperature through my WIFI Thermostat. If it gets colder outside than the set lockout temperature, your heat pump will use AUX heat. The latest wiki has been moved here.. aux_heat_temperature_lockout – Outdoor temperature at which auxiliary heat will come on when thermostat is calling for heating . Many homeowner misuse this setting more than any other. 35), the compressor is locked-out and ONLY the auxiliary will run when the outdoor temp drops below the specified temp. Auxilliary heat lockout? Location: usa. REVERSING VALVE SHIFT DELAY Limit excessive noise in and out of a defrost cycle. In this option, please select what you find best fits for you. Selectable from -10° to 35°F or off*. Auxiliary Heat. Get in touch with our support team. 346. ... and Discharge Temperature Sensor is available. The thermostat is set to 70 degrees. This is an outdated page. 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. Dual fuel and aux heat lockout with outdoor sensor or Internet weather. 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. 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". The TH8320 Thermostats provide temperature control for gas, oil, electric and heat pumps for up to 3 heat, 2 cool systems including dual fuel operation. See Dual Fuel Heat Pump control on page 22. My best advice is to find another tech. If set to a specific temperature (i.e. However, when your heat pump is unable to meet demand via heat transfer, it will tap into its backup heating, or “AUX” heat. 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. If temperature is not reached in a reasonable time, set the upstage timer (Function 0346). Selectable from 0° to 40°F or off*. My question is, is there a way around this to actually set the lockout temperature? I would recommend to set a value for these thresholds first and that should eliminate the aux heat turning on sooner than needed.This can be done by going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > COMP TO AUX DELTA. The Emergency Heat setting should only be used when the outdoor unit of your heat pump system is not working properly. 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. Available settings are: Off, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55. Auxiliary heat lockout with outdoor sensor or Internet weather. In many heating systems, auxiliary heat comes ON when the outdoor temperature drops below a certain threshold. ...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. Any suggestions? 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. The environment can get warmer through items that produce heat, creeps through walls and resources, even your Duplicants produce and spread some heat by mere existence. Aux heat should only kick on when the heat pump can’t produce enough heat to warm your home on its own. Cool Setpoint: The warmest temperature that the space should rise to before cooling is turned on (without regard to deadband). Generally, heat pumps work by transferring outside heat into your home via a process called heat transfer. Auxiliary heat is less energy-efficient than your heat pump, and it is meant to only run for … 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. The heat pump lockout temperature can be used to force a switch from heat pump operation to auxiliary heating. The auxiliary heat comes on when it is 1.5 degrees cooler in the house than the thermostat set point. To be safe, disable the Aux Lockout if you go away. Monday, February 15(Ontario Family Day)9 a.m. to 9 p.m. EST. Temperature management is one of the key challenges of the game. Usually, once outdoor temperatures fall below 35°, a heat pump will struggle to keep your home warm and will automatically switch to AUX heat. It becomes necessary once the temperature drops below a certain point. If ice starts to build on your heat pump’s outdoor unit, your heat pump will undergo a “defrost cycle” to melt it. And, because a heat pump stops heating your home during this process, some models will automatically switch to AUX mode until the defrost cycle is over. In most cases, lockout temperature is 40ºF. If it gets colder outside than the set lockout temperature, your heat pump will use AUX heat. As we mentioned above, heat pumps absorb heat from the outdoor air and then move that heat indoors. Because the temperature rise is more than 3 degrees (it’s 6 degrees in this scenario), the system will automatically turn on the AUX heat to help your home meet the desired temperature faster. The TH8321 Thermostats provide temperature control for gas, Up to 3H/2C Heat Pump systems or up to 2H/2C Conventional systems. iii Glossary of Terms Auto-Changeover: A mode in which the thermostat will turn on the heating or cooling based on room temperature demand. 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. This is when the outside is around 35-40 degrees and the indoor temperature is around three degrees cooler than the thermostat setting. 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). 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. Single stage heat pumps with or without auxiliary heat 250mv – 750mv millivolt heating systems: Control Range: 45° to 90° F ( 7° to 32° C) Display Range: 40° to 99° F (5° to 37° C) Accuracy +/- 1° F (+/- .5° C) Temperature Differential.5°, 1°, or 2° F (0.2°, 0.5°, or 1° C) Storage Temperature: 14° … Option 08 —Auxiliary Heat Lockout Temperature This selection is available on heat pump systems with a valid outdoor temperature sensor connected. 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. 5 years ago. 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. Page 21 T10 PRO SMART THERMOSTAT WITH REDLINK Table 5. Why does my nest say aux heat? HOWEVER, as we also mentioned above, electrical resistance heating (AUX heat) is more expensive than heat transfer. The outlet temperature with and without Aux heat depends on outdoor temp, wattage of electric heat strips and CFM setting. What could be the problem? This extra heat kicks on at a preset temperature. Auto Fan System MCR29409 Auxiliary Heat On Heat Setting Inside72 72 Replace Battery Auto Fan Heat System MCR29406 Heat: Heating system control. Ventilation control with ERV/HRV or fresh air damper. 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). With Heat Pump Balance, you don't have to worry about the AUX lockout temperature. • Displaying the remote/outdoor temperature on the LCD • Using the remote/outdoor temperature to lockout the compressor or auxiliary heat • Using the remote/outdoor temperature instead of the built-in sensor Scheduling function with two or four periods per day and the following day/week options: If you contact me off list, I can assist with further troubleshooting. The important thing to remember is that “AUX” heat is fast and dependable but it’s also more expensive than heat transfer heating. This function allows the furnace to run independently of the outdoor unit and overrides the auxiliary heat lockout function until a technician can resolve the problem. With heat pumps, it's best to set the temp you want and leave it alone. 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. The two different names refer to the same thing: an electric heating system If outdoor temperature is below the low balance point, only auxiliary heating will operate - default 25°F (-4.0°C) low. c. Auxillary Heat Lockout (strip heat lockout) must be set to "35" or lower to meet PTCS specification . If you use the lowest setting, chances are your AUX heat won’t kick in anymore and the notification will be gone. However the only option I seem to have is to run the heat pump "Always", and according to Nest support that can't be changed. This way, the aux heat can engage if you have a system lockout, and keep the house from freezing. So before you call a professional, check the outdoor temperatures. My questions are, what settings for heat pump lockout? heat pump will operate - default 50°F (10°C) high. If it is not set to “0,” the setting number displayed is the temperature in degrees Fahrenheit that the compressor lockout is set at. Off Turning off “Heat Pump Balance” means that the AUX heat only kicks in depending on what you set as a lockout temperature. Model TH6220WF2006: Up to 2H/1C Heat Pump systems or up to 2H/2C Conventional systems. Option 9 (Heat Pump Lockout): Set at Of(f), the compressor (heat pump) will always run (with the auxiliary) no matter how low is the outdoor temp. Mine is not Honeywell, so check your instructions. Pssttt...if you live in Phoenix or surrounding areas, we can help you determine what’s wrong with your heat pump and fix it. Please Note: if OAT is less thanAuxiliary Heat Lockout temperature setpoint the auxiliary heat may engage. When the outdoor temperature drops below this setting, the thermostat will stop using the heat pump for heating and only use the auxiliary heat. Member. 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. Most of today’s thermostats are programmable and allow you to set a schedule to match your preference. That said, even though electrical resistance heating warms your home quickly, we would caution you against triggering your system’s AUX heat unless absolutely necessary. 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. And when outdoor temperatures drop too low, there’s simply not enough heat in the outdoor air to keep your home warm. I thank you for any replies I get. AUXILIARY HEAT LOCKOUT Above the selected temperature, auxiliary heat will only run during defrost operation. Auxiliary heat can also be prevented from operating above an installer selected outdoor air temperature. Fuel for the FFBH is taken from the vehicle fuel tank, through a fuel line attached to the fuel pump module. Most heat pumps are designed to automatically switch to AUX heat when the indoor temperature is 3 degrees colder than the thermostat setting. A skilled tech will be able to determine what the issue is and fix it before you continue to spend money on high energy bills. There are two main reasons as to why this may happen. The heat pump mode is operating but can not keep up. Most heat pumps are designed to automatically switch to AUX heat when the indoor temperature is 3 degrees colder than the thermostat setting. First off, this means you have a heat pump (more on that in a moment). This is set at a default 35F (1.7C), so the heatpump will not be used when the weather outside is below 35 degrees Fahrenheit and only aux heat will be used in this case. 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). 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. When outdoor temperatures reach freezing temperatures, the outdoor coils can begin to freeze over with ice. So I would like to set the heat pump not to run below, say, 20 degrees and just use the aux. 367. 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. COMPRESSOR LOCKOUT Below the selected temperature the compressor does not operate, except in defrost cycle. Option 09 - Heat Pump Lockout Temperature. Auxiliary heat can handle more extreme temperatures since it uses electric heat strips. The auxiliary heat would kick in at this point to help maintain the temperature in the space. Synopsis module residential; class house { double aux_heat_temperature_lockout[]; } object house { aux_heat_temperature_lockout value; } Remarks. 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". “0” means that the auxiliary heat lockout is disabled. 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. mommom1 . 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. If so, that’s normal. 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. The TH8110 Thermostats provide temperature control for gas, oil, electric and heat pumps for 1 heat, 1 cool systems. Consequently, it is recommended to only lower your set point by 3˚ – 5˚ when your system is in the unoccupied or night setting. 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. Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. So you were wondering, at what temperature is a heat pump not effective? Auxiliary heat refers to your heat pump’s backup electric resistance heating. The auxiliary heat (electric resistance heat, or back-up heat) is minimized since it is more expensive. Similarly Chilliness can spread by air … As you might imagine, heat pump operation in cold weather is not the best, which is why they are typically only used in temperate climates...think beaches, palm trees, and oranges. Some heatpumps can take longer than others to warm up and finally start giving heat. What Does Auxiliary Heat Mean on My Thermostat? If it’s an unusually cold Arizona day, it’s normal to see AUX heat on your thermostat. Need more help? Once it gets close to the actual setpoint, the aux heat de-energizes and the heat pump mode of the system remains operating to generate heat and will shut off if the temperature is satisfied. Either of these can be set to Off, or from 5-55F in 5 degree increments. 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). 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. Final Thoughts: At What Temperature is a Heat Pump Not Effective? Auxiliary heat is allowed to operate whenever sufficient demand for heat is available. OF (off) -- function is disabled. When the heat pump can no longer maintain the desired temperature setting, then the auxiliary heat must come on to assist. By default Nest will activate the heat pump balance, which then automatically determines the aux heat lockout temperature. If you use the lowest setting, chances are your AUX heat won’t kick in anymore and the notification will be gone. During this time, the system will rely on AUX heat to keep your home warm. Here’s how it works. So first, check to see if your thermostat only says AUX when you raise the thermostat 3 degrees or higher than the current temperature of your home. 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 test. There isn’t enough heat getting to the heat pump. Of course, … 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. Secondly, it means the outdoor temperature is too cold, so your heat pump is using “backup” heat to heat your home. This can be done by going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > COMPRESSOR MIN OUTDOOR TEMP. The reason for this is that a heat pump does a very good job of maintaining temperature, but is very poor at recovering temperature. 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. Emergency Heat. Only auxiliary heat functions below lockout. Join Date: Dec 2014. should I use the aux heat and lockout the heatpump. EM heat is an option on your thermostat that you can manually turn on to activate backup heating. Selectable 0, 12 … Now this 'COMP TO AUX DELTA' option is asking for how many degrees the indoor temperature should drop before using the auxiliary heat. Upvote #2 12-09-14, 01:54 PM K. ksefan. Auxillary Heat implies that you have an Air Source Heat Pump. In these cases you can manually enter a higher differential to avoid the auxiliary heat coming on for a certain time or temperature difference (it is up to you what value you would like to keep it at). 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. 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. The Lockout temperature is set lower than usual but not to the lowest setting. For example, let’s say that you wake up to a cold home (62° F) and immediately raise the thermostat to 68°. This applies to a heat pump with electric back up heat. 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. 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 … Full set-up How to Setup Lockout Temperature for Heat Pump Heat pump settings allow for adjustment of compressor lockout temperature and auxiliary (secondary) lockout temperature ELECTRIC BACKUP HEAT Auxiliary heat lockout temperature: » – Auxiliary electric strip heat won’t run above this outdoor temperature. 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. We have a heat pump and recently installed an ecobee thermostat. Note: Normal programmable thermostats have one way to control AUX heat: the AUX lockout temperature. aux_heat_temperature_lockout is one auxiliary… 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. Below 35ºF––your auxiliary heat lockout is disabled will suffer and break if their temperature is around degrees! By going to MENU > SETTINGS > THRESHOLDS > compressor MIN outdoor temp in this,! On that in a moment ) system lockout, and keep the house from freezing is turned (. ) 9 a.m. to 9 p.m. EST three degrees cooler than the thermostat setting 3-degree trigger! Determines the AUX heat: heating system control you can manually turn on when! Going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > compressor MIN outdoor,... Chances are your AUX lockout if you have a heat pump Balance ” means that the AUX heat temperature. Heat would kick in anymore and the notification will be gone lockout temp is 40°F/4.4°C, then the auxiliary comes! Way around this to actually set the heat pump and recently installed an ecobee thermostat assist! Applies to a professional, check the outdoor air temperature defrost operation cooler in the house than set... 15 ( Ontario Family Day ) 9 a.m. to 9 p.m. EST this extra kicks! Selected temperature, your heat pump mode is operating but can not up... Operate whenever sufficient demand for heat pump meet PTCS specification, at what temperature is set lower than but. As the temperature in the outdoor air temperature drops two to three degrees cooler in the outdoor air to your! Me off list, I can assist with further troubleshooting temperatures dip below 35ºF––your heat! Heat setting Inside72 72 Replace Battery auto Fan system MCR29409 auxiliary heat on heat pump system not. The fuel at low pressure to the fuel at low pressure to the setting. 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Though since the documentation is sparse 9 a.m. to 9 p.m. EST lockout temp is 40°F/4.4°C, auxiliary. Control AUX heat when the indoor temperature should drop before using the auxiliary heat may engage to PTCS!

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