outdoor lockout backup heat setting

When you get down close to freezing or below the blue flame is the way to go. I have a gas furnace as my emergency heat. Good thing its not for money saving. 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. Backup heat lockout. Having to run a defrost cycle isn't uncommon at 30-35°. It's about convenience and not having to worry about snow on the heat pump. I set the function 350 (compressor lockout) to 15 degrees, the lowest that the Honeywell 8321U would allow. Tap Settings . Select Heat Pump Balance then choose the setting you want. System setting Em Heat-Heat-Off-Cool-Auto Fan setting Auto-On-Circ-Follow Schedule Terminal Voltage (50/60 Hz) Max. I replaced my inducer motor on my furnace a couple of years ago. The thermostat is a Honeywell vision pro. Many homeowner misuse this setting more than any other. AUX heat refers to your heat pump’s “backup” electric resistance heating. 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. I would like it to use only gas furnace when it’s below 30° outside. The actual setting is called Balance Point OAT - States that "Heat Pump operates above the balance point setting and the backup heat operates below the set point. 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. When the backup heat droop is set to 2 F or higher and the backup heat … My compressor lockout / balance point is at 30° and the Backup heat lockout is set to off. Heat-pump output drops as the outdoor temperature drops. 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. I am not in the business of any trade I give advice on. Presuming you use 290 KWHs a month on without using any heat. I have the backup heat lockout (gas furnace) set for 45F. 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. Without the service menu I could not change the lockout temps that were completely in favor of the heat pump. 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 above". When it gets below 40F, it loses efficiency. See Installer Setup options (ISU 3120). VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. And it also allows you to "lockout" the backup heat if temp is not below a certain temp, once again adjustable between 5F and 60F in 5F deg increments. So, let's say you set both lockouts at 30F and the droop at 2F and you set your heating setpoint at 60F. I know in the real cold back in January mine ran 30 - 35 hours straight and only needed backup in the morning because it drooped 2 degrees. Where required, these units, with appropriate accessories, may be applied to operate at outdoor temperatures below 550F. This heat setting should only kick on when the heat pump can’t produce enough heat to warm your home or if your heat pump goes into defrost mode. It is signaled as “backup” for your actual heating system since the outdoor heat pump doesn’t seem capable of handling the situation on its own. Backup heat lockout. Normally we want to lock the heat pump out so that backup heat is primary heat source at around 20 to 25 degrees as it becomes inefficient due to lost capacity. 0 Thermostat controls backup heat (outdoor sensor required) 18 Dual fuel heat pump ... 0 No droop control** 2 Droop control with Aux Heat Lockout** 20 Droop temperature (dual fuel) (EIM only) 2 Auto temperature droop 2° F (1° C) [Options: 2 to 5 (2 to 5° F / 1 to 2.5° C)] ... 90 Max. If I set it to 30° would that mean gas won’t turn on above 30°? Old man winter is here this year and I think we are going to get a good dose of snow this year. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. There may be a mechanical outdoor air stat in the heat pump if the wall control isn't doing it. I have the heat pump lockout @ 40F and the Furnace @ 45F right now. Heat pump and gas furnace as emergency heating. Heat pump stays ON when backup heat … That did not change the settings allowed for function 360 (aux lockout) below the previously set 40 degrees and the aux heat still comes on at any temperature below 40 degrees. We know you have questions, so … Lock out or Reset Overheating caused by clogged air filters or other factors can cause an air conditioner to shut down and even go into a lockout mode. Since it would need to operate at a COP of 3.6 just to break even with a 90% efficient gas furnace. I think they market them as still good down to about 20F on the most current models. Compressor lockout * No backup heat unless indoor temperature drops to selected Backup Heat Differential setting, or Backup Heat Upstage Timer expires. Press question mark to learn the rest of the keyboard shortcuts. This safety feature makes turning the system back on possible until the reset button on the outside unit is pressed back in. The optimal heat pump temperature range is above 25-30 degrees Fahrenheit. So if I set it on 35°, would that mean the gas furnace won’t turn on if it’s above 35° outside? Note: refrain from pressing buttons under the + and - as this will change the settings. Heat pumps are only really more efficient than gas down to about 35. Attempt repairs at your own risk. After verifying compressor lockout in step 3, use the button under “Select” to scroll until ISU 356 is displayed, referred to as Outdoor Lockout Backup. JavaScript is disabled. 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. This applies to a heat pump with electric back up heat. Compressor lockout. Hi. This can be done by going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > COMPRESSOR MIN OUTDOOR TEMP. ... Not sure how you are controlling back up. In theory yes, but I’d need to know what kind of system we are looking at. 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. My infrared thermometer temps at the vents are 102-103F with an ambient outdoor temp in the low 40's. What should my gas furnace lockout be set at? Right now it's 41F and I am getting 100-103F temps at the vents with the heat pump. Set the outdoor temperature at which you want to lock the heat pump out and have the backup take over and call for heat." For example, right now it’s 33° outside according to the outdoor sensor and it’s using the gas furnace. Catpower The Crowd Pleaser. Most modern heatpump are designed to run until about 35 degrees outside. For example, right now it’s 33° outside according to the outdoor sensor and it’s using the gas furnace. I run my heat pump down to - 10° as my back up heat is oil and we don't like oil - I have not used oil in the last two winters despite what people say I find its just fine ... most are set to lockout around 40*. 16 SEER Rheems for example put a ton of heat out until about 25-30, even more for 20 SEER equipment. If ISU 356 is not listed as an option, strip heat lockout is not configured and does not meet spec Tap Heat Pump Balance. Can AC compressor be repaired? The backup heat should be locked out at around 5o degrees meaning backup can not come on above 5o Right now it's 41F and I am getting 100-103F temps at the vents with the heat pump. This is what was set at 35 degrees and is now set at 15 degrees. Not part of the original programming but a temporary setting until I fixed my inducer motor on the furnace. If it is called "backup heat upstage timer" then it sounds like it only does backup. 37-38F is where you would want to swap over to gas. I have the backup heat lockout (gas furnace) set for 45F. Without your utility rates and model numbers, it's a guess when it's cheaper to run the furnace. 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. My compressor lockout / balance point is at 30° and the Backup heat lockout is set to off. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! 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. New comments cannot be posted and votes cannot be cast, All things related to HVAC - Heating, Ventilation, & Air Conditioning, Press J to jump to the feed. This mode is most useful if you live in a region where the temperature fluctuates regularly or you’re in the middle of a season change and you may need both heating and cooling at different times during the day. Depends on the SEER of the equipment, too. It was previously balanced for the gas furnace and the heat pump. With the Nest app. level 1. I recommend sizing the heat pump to meet heating load at, say, 10°F. Select your thermostat. Re-setting the system to heat mode and the fan to auto mode should solve these issues. Unless you use LP (propane) and are super worried about how much fuel you’re using, don’t change it. ... a recent contracter suggested a heat-pump system in the basement with a new oil furnace to back-up the system is the temp. When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. The heat pumps economical balance point would be around 50°F. This setting prevents your equipment from short cycling. It's not about efficiency or saving money. Usually it only gets down to the mid to upper 20's in the winter and not often. I have my heat pump (compressor) lockout set for 40F. I have a heat pump with back up gas furnace. Select a Heat Pump Balance setting. The lowest possible range in Auto mode the ecobee can maintain is 2⁰F/1.1⁰C. There is a 4 digit pin on the back of the honeywell that allows you to unlock the service menu. 1. I have a gas furnace as my emergency heat. 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. But heat pumps also have one huge benefit that furnaces lack: The Honeywell only does 5 degree increments. I had to use the heat pump exclusively until I completed the necessary repair. 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. When the backup heat droop is set to 2 F or higher and the backup heat … Heatpumps can just fine when there's snow, no need to shut it down. Before adjusting this setting, we recommend … Unless you have a mini-split or something made to go below 20 degrees. If it's going into aux heat, then it's because the outdoor temp or pressure switches are saying it should. If checking the thermostat doesn’t solve the problem, and your system still isn’t heating and cooling correctly, you’ll need to start looking more closely at the indoor and outdoor … I have non-professional hvac experience + good knowledge of theory. I could. I would say 30-35 is perfect. … I have my heat pump (compressor) lockout set for 40F. Close. Along these same lines, the auxiliary heat may come on if the unit has been running for ten to fifteen minutes without any change in the temperature of your home. The last thing needed in thischain, though, isreliable lockout of auxiliary heat operation when outdoor temperature isrelatively mild. Most heat pump thermostats bring on the back up heat when the temperature difference between the room and that thermostat setting is 3 degrees or more. The temperature below which you want to use Auxiliary heat (rather than the heat pump compressor) is referred to as the "Compressor Lockout" setting in the website and app interfaces. Outdoor temperature. This is set to 5⁰F/2.8⁰C by default, meaning the shortest range you can maintain in Auto mode is 5⁰F (70⁰–75⁰, for example). After verifying compressor lockout in step 4, scroll to Code 312 "Outdoor Lockout BACKUP HEAT" b. Verify temperature is set to 35 degrees or less to meet spec The heat pump still worked into the teens a few years ago. Helping You to Do It Yourself! For a better experience, please enable JavaScript in your browser before proceeding. This is set at a default 35F (1.7C), so the heatpump will not be used when the weather outside is below 35 degrees … Also, both the heat pump and the electric backup run on very short cycles. Current Rating W - O/B 18 to 30 VAC and 750 mVDC 1.00A Y (cooling) 18 to 30 VAC 1.00A G (fan) 18 to 30 VAC 0.50A W2 - Aux 1 (heating) 18 to 30 VAC 0.60A W3 - Aux 2 (heating) 18 to 30 VAC 0.60A Y2 (cooling) 18 to 30 VAC 0.60A When it gets below 40F, it loses efficiency. Electric - Backup heat allowed to run with heat pump Heat pump only Backup heat lockout Heat pump with backup heat as needed * Compressor lockout Backup heat only No backup heat unless indoor temperature drops to selected Backup Heat Differential setting, or Backup Heat Upstage Timer expires. 16 hours sounds good but you could also turn it off if your droop setting works. Setting temperature lockout on Trane Heat Pump. What does that setting mean exactly? The Emergency Heat setting should only be used when the outdoor unit of your heat pump system is not working properly.

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