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. Your tech is full of sh%t and just making an excuse. When the compressor is not needed, the switch is turned to the off position, and the compressor will not run. hb`````````mc@@$!'8rYp[xqsfRA-a!&1ga #O[;i2)S8ps-e0][e+2.:#@ E!2 Compressor Lockout - Recovery - HVAC-Talk: Heating, Air & Refrigeration Heat pump thermostat balance point. - DIY Home Improvement Forum The fan came on and started to blow out [I]moderately[/I] warm air. What does the zone controller antenna light indicate? How do I adjust how long a thermostat keeps the fan enabled after a heating or cooling cycle? G -> G Thus, causing the compressor to overheat. Is there a purge cycle at the end of a heating or cooling cycle? Does Pelican enforce any short-cycle timers? If emergency heat is already activated, select leave on to leave it on or turn off to deactivate it. Yes, Nest can compressor lockout. A compressor lockout balance point is a pressure point at which the compressor will no longer function. We provide heating, air conditioning, geothermal, heat pump, furnace installation, repair, and maintenance in Hamel, IL and the surrounding areas: Maryville, IL | Glen Carbon, IL | Greenville, IL | Edwardsville, IL | And More, Spring Cleaning Hacks for Your HVAC System, Our goal is to help educate our customers in, Hamel, Alton, Glen Carbon, Highland, Greenville, and Troy, Illinois and surrounding areas. In an air-source heat pump, the COP is a 2-4: you get two to four times as much heat out as you put energy in. Otherwise, the compressor will not run. The only problem is countryboymo is that you have a heat pump with electric heat strips and david2850 has a heat pump with a gas furnace for back up. A compressor lockout balance point is a pressure point at which the compressor will no longer function. forced air. You are fine running your heat pump at 25F and below. Insert your own prices and furnace efficiency for more accurate costs. Is there a supply air low temperature alarm? The 2009 Washington State Energy Code, states that the control for the lockout temperature shall have a maximum setting of 40 degrees F, and set for 32 degrees or less at final inspection. If you live in an area with cold winters, its a good idea to have a backup heating source for your home. You will need to send a request to Pelican Technical Support to add this configuration to your thermostats. This can be caused by a variety of things, such as a power outage, a problem with the electrical system, or a problem with the compressor itself. When the outside temperature is too cold, the Compressor Lockout feature will turn off your AC unit. Point requires an outdoor sensor. In other words, can I know just by checking my system components? If you live in areas with temperatures that drop below 59 degrees in winter, your heat pump will usually have auxiliary heat (emergency heat.). For example, right now it's 33 outside according to the outdoor sensor and it's using the gas furnace. 37-38F is where you would want to swap over to gas. Setting temperature lockout on Trane Heat Pump : r/HVAC - Reddit It's about convenience and not having to worry about snow on the heat pump. What does the Standard Subscription provide? ), Frigidaire Dishwasher Buttons Not Working? No. Heat Pump Balance - Google Nest Help B -> Not connected Houzz uses cookies and similar technologies to personalise my experience, serve me relevant content, and improve Houzz products and services. 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. Please enter the name by which you would like to log-in and be known on this site. Just like air conditioners, heat pumps use refrigerant to transfer heat between the indoor and the outdoor environment. The most common cause of a compressor lockout is a pressure difference between the inlet and outlet of the compressor. So if you switch to a backup electric heat source, youre also switching to paying two to four times as much for the same amount of heat. 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. Houzz Pro: One simple solution for contractors and design pros, New project for a new year: Swap your conventional heater for an energy-saving model and dont be fooled by misinformation, Keep dollars in your pocket and preserve a precious resource with these easy DIY strategies, Landscape Architects & Landscape Designers, Outdoor Lighting & Audio/Visual Specialists, Fort Collins Home Automation & Home Media, Glendale Heights Home Automation & Home Media, Safety Harbor Home Automation & Home Media, Windsor Locks Home Automation & Home Media. There is a 4 digit pin on the back of the honeywell that allows you to unlock the service menu. Once the outdoor temperature rises above the minimum limit, you can switch back to the heat pump. 2. Imjust had a new system with a honeywell t6 pro When should I use the thermostat Calibration Degrees? Compressor lockout is a safety feature that prevents the compressor from overheating due to any problem and keeps it from danger. How do I set multiple fan speeds on a package unit? is running but it does indicate that an auxiliary stage is on. How do I configure a Pelican thermostat to control a hot water, steam, or chilled water floating actuator? I have a heat pump with back up gas furnace. On my system, they are set as follows: Joseph is an HVAC technician and a hobbyist blogger. Questions About Becoming A Professional Member? What was actually reset? Sounds like it has been set up to control a fossil fuel aux heat. 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. As I stated before, your tech is full of sh%t and just making an excuse for his ignorance. 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= $11.71. Also, check if there is enough room for the indoor unit to circulate air. If your Nest thermostat is connected to a central AC unit, you may have noticed the Compressor Lockout feature in the settings. If the pressure difference is too great, the compressor will shut down to prevent damage to the system. Default is Off if ISU 2010 Heating Please enter a valid email address for yourself. Therefore, due to this lack of air, the system ends up with a high-pressure lockout. Can I disable or lock the thermostats Fan Button? If youre not familiar with how compressors work, they are responsible for cooling the refrigerant in your AC system. What am I suppose to set the Backup heat lockout to? : r/HVAC - Reddit Hes been working as an HVAC technician for almost 13 years, and he started blogging justRead more. Can a Pelican thermostat control three fan speeds? Joseph loves to talk about HVAC devices, their uses, maintenance, installation, fixing, and different problems people face with their HVAC devices. The same applies to nest auxiliary heat lockout, it can help you save on electricity bills, especially if used together with heat pump balancing. 195 0 obj <>stream This can be caused by a variety of things, such as a clogged filter, a restriction in the system, or a problem with the compressor itself. 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. Presuming you use 290 KWHs a month on without using any heat. How do I configure a Pelican thermostat to control a floating zone damper actuator? 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. How does Pelican calculate Usage Graphs runtime, cost and energy? What is Compressor Lockout? - Pelican Wireless Systems If you are not a member of the trade, please post in our Q&A sub, r/hvacadvice. Does the PEARL meet 2019 California Title 24? How Do I Turn on The Auxiliary Heat on My Nest Thermostat? In general, the lockout should be set to a temperature that is 10-15 degrees Fahrenheit higher than the ambient temperature. The compressor lockout feature is not adjustable. However, when the temperatures start to rise, you rely on it to keep your home cool and comfortable. W -> W When will a door has been left open notification be generated? When will my Pelican economizer(s) be active? 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. Today it's warmer and I see the attic unit is running on heat pump at 32 degrees F (showing Heat on the screen and . This is to prevent excessive head pressure building up in the indoor coil, stressing the compressor and system. Carrier has a separate compressor lockout board on its system. Maybe I need some education here, but as long as Aux Heat [B]doesn't[/B] come on, wouldn't the heated air coming out of the vents always be more or less the same temperature until the area achieves the desired temp. Heat pumps are best suited for regions with mild temperatures. However, the aux heating cost be 2-5 times more than heat pumps. hbbd```b``n@$=w.)Hq:,R"xH|i(6_, b30E"! Can a PEARL control a separate supply and return damper actuator? 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. Thank you. The lock out only prevents temperature adjustments, no higher than what you set and no lower than what you set. I did Heating Cost Calcs that looked at the COf using the discounted DTE winter rates (5.5 c/Kw). Heat pump Outdoor Temperature Lockouts | DIY Home Improvement Forum This may cause a high-pressure cutout. Master bedroom hot - don't see any thingys to shut off ducts Do Not Sell or Share My Personal Information. What are scheduled outside ventilation settings? If it is the 410A system, then the tech needs to make sure the pressures are exact, according to the charging chart inside the unit. If you have a Nest thermostat, you may be wondering what compressor lockout is and how it works. Due to the non-condensable in the system, it will cause a high-pressure lockout. If the compressor loses power, it will shut down to prevent damage to the system. Compressor lockout on a thermostat is a feature that prevents the compressor from turning on if the temperature inside the home is already low enough. Amazon and the Amazon logo are trademarks of Amazon.com, Inc or its affiliates. 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. I have a forced air system. 2023 HVAC Buster All Rights Reserved. My visionpro T-stat does everything I need other then tell which stage of aux. What is your delivered price for natural gas (in $ per ccf or $ per therm)? ), it costs less than $2.00 per day to operate the heat pump, even on the coldest of days. Compressors have a reset button on them. If you have any further questions about compressor lockout on Nest, please leave them in the comments below. This will cause the system to overheat its compressor which causes a low-pressure cutout. While working hard to keep up with your requirement, it may stretch the compressors capability of operating. 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. This causes the compressor not to get the necessary air required for cooling. Yes, a coaxial freeze thermostat can compressor lockout. Therefore, to start the appliance after a compressor lockout, you will have to press the compressor reset button manually. Can a PEARL open a two position outside damper? Can a Z8 or Z24 control a separate supply and return damper actuator? . Thats less than half of what it would have cost me using natural gas alone. How do I choose which days my site is on vacation? 5. It may happen due to the dirty filters as well. Set Compressor Lockout to the temperature below which it is inefficient to run the heat pump. Does Pelican track any critical or private information or data. Y -> Y/Y1 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. Good thing its not for money saving. Here is the manual for the Hunter 44550. Since it would need to operate at a COP of 3.6 just to break even with a 90% efficient gas furnace. All these appliances require a compressor to operate appropriately from refrigerators to heaters. How Does a Compressor Lock-Out Switch Work? | Hunker * Note: The Compressor Lockout configuration is only available if your Pelican Solution has an outside temperature sensor part of the overall system. How do I make a copy of a shared schedule? I have a honeywell THX 9321 thermostat . How do I stop a phone number from receiving text notifications? Replace a new conventional HVAC system with a heat pump system? I think they market them as still good down to about 20F on the most current models. If your heat pump goes into lockout mode, it means that the outdoor temperature has fallen below the minimum temperature limit for your heat pump. What should I set Anticipation Degrees to? This helps prevent any damage to a compressor by automatically turning it off. Balance Point (Compressor Lockout) Off, 5 F to 60 F (in 5 F increments) or -15.0 C to 15.5 C (in 2.5 C or 3.0 C increments) Compressor Lockout requires an outdoor temperature. Auxiliary heat is very inefficient but takes a shorter time to warm your home and reach the set temperature quickly. `x HW0N s-M@":` H!0)He`W$& b Next time the tech comes out, ask him for your superheat and subcooling temperatures. My compressor lockout / balance point is at 30 and the Backup heat lockout is set to off. 1995-2023 MH Sub I, LLC dba Internet Brands. Provide the pricing and I'll work the numbers for you. 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. This is usually caused by a pressure imbalance in the system, which can be caused by a variety of factors. Although FSI is a reputable brand for its product quality, it does not have a compressor lockout in its systems. Balance Point (Compressor Lockout) Off, 5 F to 60 F (in 5 F increments) or 15.0 C to 15.5 C (in 2.5 C or 3.0 C increments) Compressor Lockout requires an outdoor temperature. 356 Outdoor Lockout Backup Heat -- = Off 5 F to 65 F (in 5 F increments) This is when your home HVAC system switches over to backup heat, usually an electric resistance heating element. 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. Can a dirty compressor cause high-pressure lockout? A question OP might ask is at what outdoor temperature (on average) his heat pump goes into defrost. 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. You can change this option any time in the Nest Sense menu. What Is Compressor Lockout? (All You Need to Know) It causes the compressor to shut down automatically. This causes the compressor to malfunction and cause it to become unstable. Its not going to prevent setting by outdoor temperatures. If I reset the compressor lockout temperature back to 40 degrees, then getting a heat pump was a waste of money. How do I create a New Pelican Site (web-app)? endstream endobj 99 0 obj <>/Metadata 3 0 R/Pages 96 0 R/StructTreeRoot 10 0 R/Type/Catalog/ViewerPreferences<>>> endobj 100 0 obj <. Compressor lockout is a function that is used to prevent the compressor from short cycling, which can damage the compressor and decrease its efficiency. Heat pump - how to determine compressor lockout (aux heat only - Reddit Thanks for the replies, I'll give the suggestions a try. The Compressor Lockout feature is a safety feature that is designed to protect your AC unit from damage.
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