The user can select either Normally Open or Normally Closed I have a heat pump with back up gas furnace. The Climatuff ® compressor you’ll find at the heart of every Trane XR heat pump is a marvel of reliability, known throughout the industry for providing years of trouble-free comfort. My understanding is that heat pumps of SEER 15 can be more energy efficient than resistive heat down to about 20 degrees F or so, so that's what I was thinking about setting it to. Heat pump compressor lockout temperature? What could be the problem? And a variable speed compressor costs more than both. 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. Discussion on Google Nest products, including installation and configuration. New comments cannot be posted and votes cannot be cast. However, my system has a pretty long exposed condensate drain which is just freezing solid, after which I get water dripping out of my air handler and pooling on the floor. A/C or Heat Pump Compressor High Head Pressure Diagnostic Checklist 12 Causes of High Head Pressure at an Air Conditioner, Heat Pump or other Refrigeration System. I posted about this exact thing 2 weeks ago: https://www.reddit.com/r/Nest/comments/7mizg2/force_aux_heat/. An air conditioner or heat pump compressor pulls a high amp draw on startup, which is technically called locked rotor amps. I've had my Nest for 2 years now and generally it does what I want. The information given below can be helpful for you then. And his was a heat pump as far as I know it's still running. I read this directly from an un-named article on the internet that has a number one position in a search for troubleshooting heat pumps – “check the heat pumps … Compressor Stage 2 Temperature Delta: The minimum number of degrees from the desired temperature (set point) before engaging the second stage of the compressor. Many time when it gets cool over night, the refrigerant will migrate to the outdoor coil. Now I keep on getting alerts that the Aux heat is running. When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. 4 factors that affect the price of a heat pump compressor Factor #1: Single-stage vs. two stage vs. variable speed compressors. Learn how to diagnose common issues before calling in backup. Some heatpumps can take longer than others to warm up and finally start giving heat. No matter what the weather is like outside, geothermal heat pumps deliver energy-efficient performance to give you the most comfortable indoor comfort for your home. Now this 'COMP TO AUX DELTA' option is asking for how many degrees the indoor temperature should drop before using the auxiliary heat. Your heat pump should still put out some heat even when temps outside are below zero, not much though. This is set at a default 35F (1.7C), so the heatpump will not be used when the weather outside is below 35 degrees … The other method is to disconnect the Aux control wire. Carrier Infinity thermal lockout low/high stage. Caution, entering installer set -up mode may result in altering settings Do not press the + or buttons when in the installer set– -up (ISU) or settings will be altered . If you feel the temperature in your house is getting higher, it may be because of heat pump fan not spinning, and therefore, heat pump not cooling. It's set now, thanks again. I have seen maybe 3 of those units and one oy my customers elected for the replacement compressor. With electric backup heat you should not need to lock out backup heat. When I did resi, it was not at all uncommon to find units rigged to bring 1st stage electric (5kw) on with the compressor in heat mode. If your heat pump is constantly running, there are likely three main causes: Unusually cold weather: Heat pumps are designed to work much more gradually than a furnace. A service tech should be able to set it down to a lower setting no problem. Is a Password Requried? The compressor has to start from a full stop to full blast in less than a second. PTCS Heat Pump Thermostat Support Sheet Manufacturer: Honeywell Thermostat Models: T6 Pro TH6320U2008, TH6220U2000, TH6210U2001 Page 1 of 2. I finally got to change that setting - that's the one I had asked Nest support about, and they hadn't explained that once you click on the "Always" you can select a temperature. 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. The Fast setting will determine how fast the second stage or the emergency heat comes on. 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 No 1. c. Auxillary Heat Lockout (strip heat lockout) must be set to "35" or lower to meet PTCS specification PTCS Heat Pump Thermostat Support Sheet 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. An air source heat pump has two parts, an indoor unit with a coil and a fan to push the air through your home; and an outdoor unit with another coil, another fan and a compressor. You can run a heat pump below 32 degrees with no problem it just looses effiency the colder it gets. Hi. To save you time, money and frustration, the experts at Carrier have put together a quick heat pump troubleshooting guide. In this option, please select what you find best fits for you. It’s possible that, if the weather is especially cold, your heat pump could run near-constantly without there being an issue. 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. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. Heat pump running constantly. Press question mark to learn the rest of the keyboard shortcuts. I've had my Nest for 2 years now and generally it does what I want. We have been getting down to 6 degrees F with snow recently, which is when the problem manifested. This can be done by going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > COMPRESSOR MIN OUTDOOR TEMP. It will run during defrost and if the heat pump can't keep up it will kick on when the indoor temp falls 2 degrees below the set point. Outdoor heat pump coils are usually around 6 circuits. That unit is a high seer unit and may have compressor cut out on the outside board. 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). And if not, what's my best alternative? Yes, I'm talking Fahrenheit. A single-stage compressor offers just one speed: high. So I would like to set the heat pump not to run below, say, 20 degrees and just use the aux. Geothermal heat pump systems tap into the energy right in your own backyard—transferring heat to or from the earth to heat or cool your home. the compressor lockout is set at. Trane Heat Pump ac compressor kicks in for about 3 minutes then stops. With this extreme cold, however, I've hit a problem. If you're not talking F, I'm not sure how the water is freezing. Rheem R-410A Heat Pump Troubleshooting July 2018 edited July 2018 in A-C, Heat Pumps & Refrigeration. 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 the backup heat droop is set to Comfort, the control algorithm will use backup heat as needed to maintain the setpoint within +/- 1 F. I'm leaning towards an ecobee, but happy to hear any ideas. My compressor lockout / balance point is at 30° and the Backup heat lockout is set to off. update I ran the system in cool mode and dropped the house temp 2 degrees and the compressor never locked out. Then raise to temp it can handle the load. That's exactly what I was looking for, I'll try it - thanks! My question is, is there a way around this to actually set the lockout temperature? With this extreme cold, however, I've hit a problem. The heat pump compressor, however, has two main purposes: to maintain the refrigerant flowing inside the heat pump and to increase the pressure in which the refrigerant is compressed into gas. 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. Be sure the compressor lock-out function is disabled. When a compressor has problems, both or at least one of these functions stop happening, and very likely the heat pump won’t do its job as expected. Set compressor lock out to 30, or lower, to see at what temp the heat pump really can't handle the load. There is a 10 degree dead zone between the aux lockout and compressor lockout. every heat pump are the compressor and the coil. Monday, February 15(Ontario Family Day)9 a.m. to 9 p.m. EST. We have a heat pump and recently installed an ecobee thermostat. How it affects price: A two-stage compressor will cost more than a single-stage compressor. Need more help? Sometimes, the sound of the outdoor unit fan or compressor relay can be transmitted in a way that makes it … Jon Held_2 Member Posts: 21. 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. Upvote. Assure high voltage power is disconnected using lockout / tag-out procedures if applicable prior to connecting low voltage wiring. Usually when the outside temperature is above 30° it uses heat pump only but when it’s close to 30° it uses the back up gas furnace. In other words if your aux lockout doesn't go lower than 40 degrees then your compressor lockout is set at 30 degrees. If you have a dual fuel system, a type of system with a heat pump outside and a separate heater installed inside your home, you won't be able to use Heat Pump Balance. 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. If the system starts up before the outdoor temperature has warmed up enough to cause the refrigerant to migrate, the refrigerant will still be sitting in the outdoor coil. Below we list a dozen causes of high head pressure in an air conditioner or heat pump compressor motor. When heat pump is operating in defrost mode, ice will thaw from around outdoor coil and water will flow from the unit. However, you can disable the furnace by changing the System Type in the installer menu to one without Aux heat. Designed for long lasting performance, the Climatuff has been I then put the system back into heat mode and ran the temp back up 3 degrees the compressor did not lock out in the 30 minutes it took to get there. Heat pump problems can be frustrating (and expensive). In the lockout mode, the compressor will not operate, the alarm output is energized and the red LED will blink to indicate which fault has occurred. Not surprising everybody hates heat pumps in this area, the electric bills have got to be insane. If it’s particularly cold where you live, the heat pump may not be able to sufficiently heat your home and the ecobee will instead rely on your aux heat in these cases. Clicking noise heard inside. I'm assuming you're talking in Fahrenheit, so, assuming your heat pump is more energy efficient than your aux heat, why not just keep the minimum temp at 40F? Heat Pump Repair Advice Advisory. But most dual fuel compatible thermostats (those that don't require a dual fuel kit) cannot be programmed to lock out the furnace. than the heat pump compressor) is referred to as the "Compressor Lockout" setting in the website and app interfaces. The compressor lockout is to protect the refrigerant compressor from burning up due to short cycling. So far, that's expected with a heat pump I gather. It could also be the cycle rate on the heating. 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". Press J to jump to the feed. Heat Pump Split System and AY28X084 Evaporator Defrost Control Thermostat Air handling unit Heat pump Thermostat unit Air handling unit Cooling unit Warning! 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. So needless to say, they have to be dependable. Should have pin settings for compressor lockout. Contractor's Assistant: Did you double-check the thermostat's … Get in touch with our support team. Fault code states "soft lock out" on both the compressor and condenser.. System in in heat mode. This can be done by going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > COMPRESSOR MIN OUTDOOR TEMP. High voltage present in the outdoor unit and indoor unit. When you read information on the web double check that the information is correct.
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