I can reject non-essential cookies by clicking Manage Preferences. diff between heat pump & aux lockout temperatures in dual fuel - Houzz In a weird side note, maybe it's just my imagination, but the heat pump seems to have a slightly longer rest cycle when the thermostat is set at 70 vs. 69. honewell t6 pro and heat pump. - HVAC-Talk: Heating, Air How do I set an individual room schedule? Can I disable the thermostats internal temperature sensor? So that, when outdoor temperatures fall below 30 degrees, the auxiliary heat will kick into action. Thank you. G Depending on your Nest thermostat model, follow these steps to correctly set up your thermostat. I have a horribly set up duct system with a tempstar 13 seer and have had no problems with even a 15 degree cutout temp. "The tech did consult the charging chart inside the unit, and I believe it was within a couple of PSI. If yes, how do I know if I have 2 heating & one cooling (or any other combination) without checking the wiring? VerticalScope Inc. All Rights Reserved. (Answered), Maytag Dishwasher Buttons Not Working? When the temperature outside is too cold, the compressor has to work harder to cool the refrigerant, which can cause it to overheat and break down. Y -> Y/Y1 of the heat pump increases with higher ambient temps. Heat pump - how to determine compressor lockout (aux heat only - Reddit How do I lock and unlock remote thermostats? Another common cause of a compressor lockout is a loss of power to the compressor. var q1ezhd9u1df5n34; (function(d, t) { var s = d.createElement(t), options = { 'userName':'cornerstonead', 'formHash':'q1ezhd9u1df5n34', 'autoResize':true, 'height':'662', 'async':true, 'host':'wufoo.com', 'header':'hide', 'defaultValues':'Field6=' + encodeURIComponent(encodeURIComponent(typeof wca == "undefined" ? "" Let us help you understand what compressor lockout is and discuss some necessary facts and information related to it. Can I set a time delay before a PM5 turns off with On-Demand Start? hbbd```b``n@$=w.)Hq:,R"xH|i(6_, b30E"! The tech did consult the charging chart inside the unit, and I believe it was within a couple of PSI. As a result, the indoor unit will not get enough air in the system. The service manager was out on Thursday and rechecked the system, apologized for the erroneous information the service technician told me, and returned my un-cashed check. This may cause a high-pressure cutout. What is a VAV (Variable Air Volume) system? It locks out the compressor when the temperature hits a lockdown temperature. Note that passwords are case-sensitive. Balance point setting for dual fuel : r/HVAC - Reddit Auxiliary heat is very inefficient but takes a shorter time to warm your home and reach the set temperature quickly. Usually when the outside temperature is above 30 it uses heat pump only but when its close to 30 it uses the back up gas furnace. is running but it does indicate that an auxiliary stage is on. Imjust had a new system with a honeywell t6 pro In the above example, the heat pump is 35% cheaper than the 80% efficient gas furnace for the same 1 million btu's at 35F ambient. When would I disable the thermostats internal sensor? What should my gas furnace lockout be set at? How does a PEARL control a Variable Speed Fan (VFD)? Yesterday I had a technician out because the outside unit wasn't running. DoItYourself.com, founded in 1995, is the leading independent If you are comfortable and the unit keeps up, a HP should be the most cost effective. The Compressor Lockout feature is a safety feature that is designed to protect your AC unit from damage. Just like air conditioners, heat pumps use refrigerant to transfer heat between the indoor and the outdoor environment. No matter which setting you choose, Heat Pump Balance determines how often . To prevent any damage to the compressor, it enables its safety feature. This is where I think it was improperly programmed or even wired improperly. When will a heat failure notification be generated? When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. It is used in various air conditioners for its reliability. Why is cool running before the schedule starts? Good thing its not for money saving. Can a Pelican thermostat control three fan speeds? Your heat pump is designed to run at low ambient temps (long run times). All information is provided "AS IS." The compressor will not turn on until you do not press the reset button. Lockout / Balance . Website operating What is an economizer low limited mixed air temperature? (All You Need to Know). %PDF-1.7 % How do I rename an existing shared schedule? Heat pump capacity drops at colder temperatures. The most common cause of a compressor lockout is a pressure difference between the inlet and outlet of the compressor. This is to prevent excessive head pressure building up in the indoor coil, stressing the compressor and system. What does the Standard Subscription provide? I don't want to pay a fortune for a Tstat with lights when this one does everything I need other than have a few indicators. (Read This First! However, when he put the gauges on, the pressures read normal. I have the backup heat lockout (gas furnace) set for 45F. However, the aux heating cost be 2-5 times more than heat pumps. Equipment Type is Air to Air Heat Pump. Here's some background: What is on a rooms climate control page? W -> W Although this is already a function of the Pelican PEARL economizer controller, in some situations customers use Compressor Lockout to prevent the compressors from being turning once the outside air is below a certain set point to force economizer only activity. I've changed this setting myself several times and it's currently set to 25 degrees. We welcome your comments and Interested in learning more about us? What temperature should I set compressor lockout? Does that sound correct? How do I make a delete a shared schedule? If your Nest thermostat is connected to a central AC unit, you may have noticed the Compressor Lockout feature in the settings. Why does one of my thermostats say Unreachable? Can a PEARL control a separate supply and return damper actuator? Since it would need to operate at a COP of 3.6 just to break even with a 90% efficient gas furnace. But for it to be effective at doing that, there needs to be enough heat energy available and as the temperature drops outside, not only does your home take more energy to keep warm, theres less heat energy that your heat pump can extract from the outside air. 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. Heat pump w/electricity at 12 cents per kw-hr, Coefficient of Performance = 3 at 35F ambient: (1,000,000 / 3414 btu per kw-hr) x .12 / 3. Again, I think I need some education here, but my understanding is that I [I]don't[/I] have a heat pump, but rather a electric furnace and an outside AC unit. Why is the relay wiring module not communicating? When your outdoor temperature drops too low, your heat pump wont be able to keep up with warming your home. Can I set a mixed air low limit for a PEARL? How do I adjust how long a thermostat keeps the fan enabled after a heating or cooling cycle? It was previously balanced for the gas furnace and the heat pump. This could be 0 or -10F. Do I need a Public IP address for a Pelican gateway? When will a door has been left open notification be generated? A compressor lockout causes the compressor to lock itself for running until the owners do the necessary operations to unlock. When will a thermostat unreachable notification be generated? to this site, and use it for non-commercial use subject to our terms of use. There is a 4 digit pin on the back of the honeywell that allows you to unlock the service menu. forced air. The device is usually installed on the compressor itself and is activated by a switch that is mounted on the wall near the thermostat. What does a PEARLs Variable Speed Fan (VFD) configuration do? When the temperature outside drops below a certain point, the sensor triggers the compressor lockout feature. How do I share schedules between multiple rooms? How do I schedule an event for a single room? Therefore, this safety feature helps to prevent that. A compressor lockout balance point is a pressure point at which the compressor will no longer function. Note: refrain from pressni g buttons under the + and - as this will change the settings b. Scroll through until ISU 130 is displayed, referred to as Outdoor Sensor c. For the record, I current have it set to 15. What Is Compressor Lockout? (All You Need to Know) Default is Off if ISU 2010 Heating How do I disable my entire sites ventilation in an emergency? Setting temperature lockout on Trane Heat Pump : r/HVAC - Reddit submitted to our "DoItYourself.com Community Forums". `x HW0N s-M@":` H!0)He`W$& b As I stated before, your tech is full of sh%t and just making an excuse for his ignorance. about energy and home comfort issues (specific to HVAC systems). Heatpumps can just fine when there's snow, no need to shut it down. 98 0 obj <> endobj If you dont know whether your heating system has aux heat, you can verify this by: However, if you are sure that your system has secondary heating, but aux heat is not working, then your thermostat wires could be loose or not connected properly. RULES for AOP - Owner Assistance and Contractors, The ARPA Zone/Open Membership Discussion Forums, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, How To Become a Pro and Rules For Pro Members, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. I would like it to use only gas furnace when its below 30 outside. How do I change a Pelican gateway from static back to DHCP? Compressor lockout mainly happens when the appliance is working hard. I could see the gauges but was too far away to read the chart myself.". You may ask which compressor has this feature. 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. What is the Maximum Ventilation Position? Joseph loves to talk about HVAC devices, their uses, maintenance, installation, fixing, and different problems people face with their HVAC devices. How do I stop an email from receiving notifications? How do I set multiple fan speeds on a package unit? This is usually caused by a pressure imbalance in the system, which can be caused by a variety of factors. How does the PEARL calculate where to place the outside damper during an economizer cycle? When programming the thermostat, the electrician set it as if I had a Multi-Stage Heat Pump. Now that you know what nest compressor lockout is, we hope youll be able to heat your home more comfortably while at the same time being careful on saving some energy costs. A compressor lockout is a device that is used to prevent the compressor from running when there is no demand for cooling. Although there are various lockouts, you have to enable the compressor by pressing the reset button in the compressor. Does your system use 410A refrigerant or R22 refrigerant? Replace a new conventional HVAC system with a heat pump system? I did Heating Cost Calcs that looked at the COf using the discounted DTE winter rates (5.5 c/Kw). What do the different notification sensitivity settings mean? If I leave it set to 25 degrees then I suspect I'll be charged for all service calls and maybe even any future repair costs. 356 Outdoor Lockout Backup Heat -- = Off 5 F to 65 F (in 5 F increments) Option 1 (Droop Control): As above, but backup heat is activated if room temp drops to the selected droop temp setting (compressor is deactivated) 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. How do I schedules with occupancy sensors? Insert your own prices and furnace efficiency for more accurate costs. To understand why this is a bad thing, you have to know a little about heating efficiency. In this state, if the compressor runs any longer, it may cause the compressor to cause a lot of problems. Hi. Nest thermostats can also be used to control other devices in your home, such as your lights and security system. The heat pumps economical balance point would be around 50F. Can't say about your Rheem, but I set the lockout on my Carrier at 25F and there haven't yet been any problems in three years. T8195B -> 44550 Lockout can be interpreted in more than one way. Auxiliary heat lockout for the Nest or any other thermostat is the temperature above which you want your system to use the compressor to heat your home rather than auxiliary heat. Honeywell T6 Pro Smart Programmable Thermostat Installation Guide Point requires an outdoor sensor. (Quick Answers), How to Clean Kenmore Dishwasher Filter? I'm assuming the -25 is a factory default set by the manufacture. How do I install a Pelican cellular gateway? Airlucent.comis a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. That is when your emergency heat will kick in to supplement your heat pumps heating. Understanding different Pelican Notifications. What are Dual Duct Variable Air Volume (DD-VAV) systems? One important feature of your AC unit is the compressor lockout. You can change this option any time in the Nest Sense menu. Participate in over 40 different forums and search/browse from nearly 3 million posts. If you live in an area with cold winters, its a good idea to have a backup heating source for your home. Natural gas at $1.44 per therm, 80% efficient furnace:(1,000,000 / 100,000 btu per therm) x 1.44 / .8= $18. Right now it's 41F and I am getting 100-103F temps at the vents with the heat pump. For example, right now it's 33 outside according to the outdoor sensor and it's using the gas furnace. 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, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. When is a low battery notification generated? It is necessary to press the button after a lockout occurs. Or do a system reset. Compressor Lockout While not required by the PTCS Spec, they should be disengaged to let the compressor run at all outdoor temps. Provide the pricing and I'll work the numbers for you. Pull off your nest thermostat from the wall and double-check your thermostat wiring. Is this true with a Good afternoon, everyone; The HeatPump Aux lockout (setting 360) set to 40 degrees F, or 4.5C. I have a heat pump with back up gas furnace. This feature is designed to protect your AC unit from damage by turning it off when the outside temperature is too cold. Can a Z8 or Z24 control a separate supply and return damper actuator? Nest Compressor Lockout (Everything you need to know) What does the Outside Ventilation setting do? Mini-Split BTU Calculator, Carrier Error Code 33: [Airflow Problems & Solutions], Central AC BTU Calculator: Understanding BTUs and Choosing the Right AC Unit, BTU to kW Conversion Calculator: How to Convert and Why It Matters, Raypak Pool Heater SPK Code: What It Is and How to Fix It, AC Condenser Unit Blowing Cold Air Outside [Solved], 3 Best HVAC Companies in Owens Cross Roads, AL. If the pressure difference is too great, the compressor will shut down to prevent damage to the system. on teh thermostat. Will My Generator Work After an Emp? However, the electric company uses a tiered rate structure, so the price per KWH varies depending on monthly usage. 0 100F: If set to any temperature between 0 and 100F, then the thermostat will not enable the compressor once the outside air gets below this temperature. 1y. But this essential component may face some issues while using. From the installer set -up, scroll through the ISU menu by pressing the button under "Select". Reason I say without checking the wires is that I didn't see how it was wired before he installed the new thermostat. Honeywell T6 Pro Z-Wave Thermostat - Installation Manual What should I set Anticipation Degrees to? 1. It would be nice to have an indicator that I could turn on or off if I got tired of the lights off the wall bracket. How do I create a New Pelican Site (web-app)? Components Coils, Heaters, Motors, etc. The outdoor unit has a condenser fan to keep the compressor cool. The Nest thermostat has a feature called compressor lockout temperature. If you are not a member of the trade, please post in our Q&A sub, r/hvacadvice. The point at which the extractable heat energy gets too low for a heat pump to adequately heat your home is called the balance point. Due to clogged dirt in the condensers, it blocks fresh air to get into the compressor. Setting 0350 is described as the "Heat Pump Compressor Lockout (Balance point)." The available settings are no compressor lockout and 15-45 degrees F in 5 degree increments. Save my name, email, and website in this browser for the next time I comment. Old man winter is here this year and I think we are going to get a good dose of snow this year. If this pressure reaches dangerous levels the switch monitor identifies this and shuts the compressor down. Once the configuration is set, the system automatically shares a single outdoor temperature to all thermostat to be used for Compressor Lockout. Let us discuss the causes by discussing the reason behind why low-pressure lockout and high-pressure lockout occurs: Refrigerant leak in the system causes the pressure inside the compressor to fall. If the electrician who was charging the system did not correctly dehydrate the system and keep any moisture in it, it is most probable that the system caused a malfunction. But heres the trick: in many heat pumps, this point is programmed in, which means that it may be set too high. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. What do the symbols on a Pelican thermostats display mean? Heat pumps are an efficient way of cooling your home. High temp lockout: if outdoor temperature exceeds a given setpoint, compressor will not run if heat pump system is in heat mode. I changed this to 15 degrees. I am sorry Tlewis I forgot that he is using a gas furnace which I know changes things a bit. The tech said it was a L21 (Lockout - Low Pressure Control Trip). suggestions. Can I set a Pelican gateway for a static IP address? Heat pumps utilize the technology of using a refrigerant to extract heat from the outside air and transfer it into your home. How does Pelican calculate Usage Graphs runtime, cost and energy? The lock out only prevents temperature adjustments, no higher than what you set and no lower than what you set. Were proud to serve homeowners in Hamel, Edwardsville, Troy and other southwest Illinois communities. Hes been working as an HVAC technician for almost 13 years, and he started blogging justRead more. Since the system was installed about 5 months ago (during the summer), he suspected that error was an old error that happened during the install. To turn on AUX heat from your home app do this: To turn on AUX heat from your thermostat, do the following: If you are dealing with aux heat not working on a Nest thermostat, the first thing you want to do is verify that your system supports aux heat. How Does a Compressor Lock-Out Switch Work? | Hunker Call 1-877-342-2087 To Find 24/7 HVAC Repair In Your Area. G -> G What is the difference between Auxiliary and Emergency Heat? Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Can I schedule when notifications are active? Would there be any advantage to one of the newer smart thermostats? For a better experience, please enable JavaScript in your browser before proceeding. For example, if a high-pressure switch opens, the lockout relay can keep the system off, even once that switch closes again. It's smart, but not that smart, however that would be a hell of a feature. Please enter a valid email address for yourself. I just had a Honeywell RTH8500 Touch Screen Programmable Thermostat installed by an electrician and I'm not convinced it's properly done. How does a thermostat control two stages of cooling? 355 Compressor Lockout / Balance Point -- = Off 5 F to 60 F (in 5 F increments) -15.0 C to 15.5 C (in 2.5 C or 3.0 C increments) Note: Use a wired sensor to set compressor lockout / balance point on TH6320 / TH6220. I can change it to none but we do generally get a few nights a year below -10 and record lows are into the -20s. Can a PEARL control multiple outside/return damper actuators? Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. Let's start with the capacity. There are particular reasons behind a compressor lockout. Maybe the Honeywell Prestige or Ecobee? Now that its cold it seems to run constantly. Thanks for the replies, I'll give the suggestions a try. When the outdoor temperature is below the configured temperature, the thermostat will switch to using the secondary heating source as its primary source and will keep the Heat Pumps compressor(s) disabled. If the condenser coils inside the system get dirty due to the dust of the outside environment, then it may cause the system to overheat. This way, you wont have to go without heat if your heat pump goes into lockout mode. It can be caused by dirty condenser coils as well. Is there a supply air low temperature alarm? What zone controller do my thermostats communicate with? Tell them to recheck the charge. If your electrician finds that your system is clean and there is no drop in pressure, then it is likely that the system has a faulty low-pressure cutout. How do I copy an existing shared schedule? How do I get to a room climate control page? There's also the matter of the outside temperature your Ecobee uses not . Joseph is an HVAC technician and a hobbyist blogger. I don't know it this had anything to do with it, but the outside temperature yesterday (during service call) was about 65 - 70. The Misunderstood Lockout Relay - HVAC School What are Mixing Box Constant Volume (MB-CV) systems? They are cheaper than resistive heating, but these come with limitations. I would definitely not go below 32. It doesn't have to be exactly the same as your balance point, and IMO, from a comfort standpoint, it shouldn't be. Sometimes, the indoor and evaporator coil gets clogged up with dirt. If your Nest thermostat is connected to a forced-air furnace (a furnace that uses ducts to deliver heat), it will turn on the furnace fan to circulate heat. When it gets below 40F, it loses efficiency. What is the economizer sequence of operation? problems contact webmaster@doityourself.com. Why? I replaced my inducer motor on my furnace a couple of years ago. Compressor overheating is not good and causes damage to the machine itself. The temperature at the register was about 86 to 88 degrees and the thermostat was set to 70. Can a Pelican thermostat control a floating actuator? Heat pumps are equipped with a reverse valve that switches the direction of the refrigerant, enabling the heat pump to work as a heater in one position and an air conditioner in the other. Rheem Heat Pump Lockout Setting - Houzz How do I add a new gateway to my existing site? Bosch Dishwasher Not Filling with Water: How to Fix? All rights reserved. As for calculating costs, the gas company uses a fairly simple formula so it's pretty easy to calculate the total cost per therm used (about $1.44 at the moment). What was actually reset? 195 0 obj <>stream Point. You may hear about compressor lockout and may ask what this is. Here are the steps that you will have to do to fix this issue: Dirty filters are one of the main reasons why a compressor lockout happens. I run my heat pump all the time at these temps (I have to as the heat pump is my primary source of heat). Not normal. That is in regions where the temperature doesnt fall below 30 degrees. What are Parallel Fan Powered Variable Air Volume (PFB-VAV) systems? ISU 3120 Compressor Lockout / Balance . To turn on Aux heat on your thermostat, you need to be sure that your system is equipped with supplementary heating (aux heat.) What is Compressor Lockout? Post photos, respond to polls and access other special features. How do I add a second gateway to my existing site? Does the PEARL meet 2019 California Title 24? How do I commission to ventilation requirements? Therefore, clean the fan and check if it is running or not. I need to get my ductwork all set up right and sealed before I think about all of this. Yes, the White Rodgers thermostat can compressor lockout. I'm in wetern NY with 2 stage heat (main-heat pump and aux-electric strips). I have the heat pump lockout @ 40F and the Furnace @ 45F right now. I'm not sure if it's more cost effective to run the heat pump, strips, or both depending on temp Around here we tell people to set it or just go on over to AUX when its down to around 20oF. Heres everything you need to know about the Compressor Lockout feature and how it can help you save money and keep your AC unit safe. To unlock a compressor, you will have to press the reset button or check the required checklist to identify the problem and resolve it to run again. To check if your Nest thermostat has compressor lockout, open the Nest app and go to Settings > Equipment. Compressor Lockout - Recovery - HVAC-Talk: Heating, Air & Refrigeration This is usually caused by a pressure imbalance in the system, which can be caused by a variety of factors. What are the remote temperature readings? If emergency heat is already activated, select leave on to leave it on or turn off to deactivate it. Nest thermostats are a type of smart thermostat that can be controlled remotely via a smartphone or other device. Trane rep agreed with this setting. THey are: Option 08 - Auxiliary Heat Lockout Temperature Option 09 - Heat Pump Lockout Temperature Either of these can be set to Off, or from 5-55F in 5 degree increments.