High temp lockout: if outdoor temperature exceeds a given setpoint, compressor will not run if heat pump system is in heat mode. Compressor . Here's the long story: I was told that the balance point was set to 30 degrees F. That's fine, I want to use as little propane as possible. R If the compressor loses power, it will shut down to prevent damage to the system. Sounds like it has been set up to control a fossil fuel aux heat. diff between heat pump & aux lockout temperatures in dual fuel - Houzz To understand why this is a bad thing, you have to know a little about heating efficiency. (What to do), What Size Mini-Split Do I Need? Thanks for reading. Default is 40 F if ISU 2010 Heating . Once the configuration is set, the system automatically shares a single outdoor temperature to all thermostat to be used for Compressor Lockout. How does Pelican calculate outdoor enthalpy levels? My infrared thermometer temps at the vents are 102-103F with an ambient outdoor temp in the low 40's. 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. He told me that Rheem does not recommend any specific compressor lockout temperature setting, but their company policy is usually to set it to 30 or 35 degrees as a matter of comfort. How do I adjust how long a thermostat keeps the fan enabled after a heating or cooling cycle? Or is it dependent on how far apart the actual and desired temps. (Answered), Maytag Dishwasher Buttons Not Working? Can I schedule the thermostat to set its heat setpoint beyond the heat range? When the system was installed the technician set the lockout temperature to 40 degrees. 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. The fan came on and started to blow out [I]moderately[/I] warm air. As for why the heat pump stopped working in the first place, he wasn't sure, but a lower pressure lockout is something usually associated with cooling, not heating. Why is Compressor Lockout Important? The Nest thermostat has a feature called compressor lockout temperature. The heat pump can run while the heat strips run at the same time, but the furnace and the heat pump can not run at the same time unless he has high temp cut outs in the supply plenum. When will my Pelican economizer(s) be active? Does Pelican enforce any short-cycle timers? How do I add a new user to my Pelican site (web-app)? You may ask what causes compressor lockout. However, the electric company uses a tiered rate structure, so the price per KWH varies depending on monthly usage. What are scheduled outside ventilation settings? Can I set a time delay before a PM5 turns off with On-Demand Start? of the heat pump increases with higher ambient temps. This helps prevent any damage to a compressor by automatically turning it off. Also, check if there is enough room for the indoor unit to circulate air. I need to get my ductwork all set up right and sealed before I think about all of this. 37-38F is where you would want to swap over to gas. 98 0 obj <> endobj Why does one of my thermostats say Unreachable? If your heat pump can keep your home warm down to, say, 30 degrees F, but your balance point is set to switch over to backup heat at 40 degrees, then anytime the temperature is in the 30- to 40-degree range, youll be paying too much for heat (if you use electric backup heating). 0 Understanding different Pelican Notifications. The compressor is the part of your HVAC system that pressurizes refrigerant and circulates it through the coils. 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 uses cookies and similar technologies to personalise my experience, serve me relevant content, and improve Houzz products and services. G Your heat pump is designed to run at low ambient temps (long run times). Piero Fusco. So ideally you can set a compressor lockout from 25-35 degrees. Compressors have a reset button on them. B -> Not connected A compressor lockout causes the compressor to lock itself for running until the owners do the necessary operations to unlock. To learn more about heat pumps, energy savings and efficiency ratings such as COP and the Heating Seasonal Performance Factor (HSPF, which looks at efficiency over an entire heating season), contact Ernst Heating and Cooling. What do the different notification sensitivity settings mean? If your compressor locks out, its important to troubleshoot the problem so that you can get it running again. It prevents the compressor from starting up if there is a problem with the unit. How to I check if a zone controller is having wireless communication issues? A subreddit for Heating, Ventilation, & Air Conditioning Technicians. W Do I have Pelican economizer controllers? A compressor has a safety mechanism that helps prevent danger by shutting it down. In general, the lockout should be set to a temperature that is 10-15 degrees Fahrenheit higher than the ambient temperature. I have a 5 month old Rheem Heat Pump with gas backup and I have a question about the compressor lockout temperature setting. When it hits the lockout temperature, it starts using the auxiliary heat on the system based on the lockout temperature is set on the system. How do I configure a Pelican thermostat to control a zone reheat valve ? My balance point seems to be around 20 degrees, so I guess my real questions is, am I putting undo stress or damaging the compressor by having the lockout set below 40 degrees like the tech said, or is having it set to 25 or even 20 degrees fine? 140 0 obj <>/Filter/FlateDecode/ID[<3CF709D322C443E783719C6C5336C80E><38F9397046A91D45A8C32210A0BE9359>]/Index[98 98]/Info 97 0 R/Length 173/Prev 369212/Root 99 0 R/Size 196/Type/XRef/W[1 3 1]>>stream This feature protects your compressor from damage by turning it off when the outdoor temperature is too high. Carrier has a separate compressor lockout board on its system. They are designed to save energy and money by automatically adjusting the temperature based on your settings and the current weather conditions. When a compressor turns on lockout mode, you have to turn it on again by pressing the reset button manually. This is because the heat pump is designed to work best in milder temperatures. What was actually reset? Call 1-877-342-2087 To Find 24/7 HVAC Repair In Your Area. 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. Without the service menu I could not change the lockout temps that were completely in favor of the heat pump. When your outdoor temperature drops too low, your heat pump wont be able to keep up with warming your home. A couple of hours after he left, I set the desired temp to 73 while the inside temp was 70. 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. Y What is your delivered price for electricity (in cents per kw-hr)? Blank (default): If left Blank then the thermostat will not use outside Compressor Lockout. However, when the temperatures start to rise, you rely on it to keep your home cool and comfortable. What Should Nest Compressor Lockout be set to? (Some air-source heat pumps are backed up by a natural gas furnace, which is a bit trickier to compare with regular heat pump operating costs since the current cost of natural gas is relatively low.). If this pressure reaches dangerous levels the switch monitor identifies this and shuts the compressor down. TX attic insulation options - foam/ radiant barrier/ blown in. Scan this QR code to download the app now. A compressor lockout balance point is a pressure point at which the compressor will no longer function. Does a Pelican gateway use a DHCP or static IP address? Directions On Maintaining Proper Ventilation Rates: COVID-19. If you live in areas with temperatures that drop below 59 degrees in winter, your heat pump will usually have auxiliary heat (emergency heat.). What does the zone controller antenna light indicate? How do I stop a phone number from receiving text notifications? Therefore, clean the fan and check if it is running or not. Due to that, the compressor cannot get enough air to circulate. (Quick Answers), Samsung Dishwasher Soap Dispenser Not Opening? 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). The lower the ambient temp, the cheaper the heat pump costs to run, but the less btu's it puts out along with lower temps out of the supply registers. The balance point temperature is about 25 F in this case. This could be 0 or -10F.