Since you are asking about a comfort temp balance point lock out. Since you don’t have AUX heat, Heat Pump Balance won't appear as an option. 4. @Joe, an outdoor lock-out (e.g. Presuming you use 290 KWHs a month on without using any heat. 99011-85Z04-03E Printed in U.S.A. TP222 3160 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) If you have wires in both the W1 and W2 connectors of your Nest thermostat, your system is a dual fuel system, and won’t use Heat Pump Balance. JavaScript is disabled. Cookies help us deliver our Services. Without your utility rates and model numbers, it's a guess when it's cheaper to run the furnace. What should my gas furnace lockout be set at? Balance Point (Compressor Lockout) 0 = Off integer from 5 to 65 degrees Fahrenheit in only 5 degrees increments. 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. Use a wired outdoor sensor connected to the “S” terminals on the UWP and set this ISU to Wired. Compressor lockout is disabled or set to 0 degrees F. The heat pump still worked into the teens a few years ago. and. 78J00-03E Prepared by September, 2006 Part No. Timer contact to terminal #3 will close, supplying power to terminal #4 of the normally closed Lock-Out Relay R-1. 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. The thermostat is a Honeywell vision pro. Heat pump and gas furnace as emergency heating. By using our Services or clicking I agree, you agree to our use of cookies. Press question mark to learn the rest of the keyboard shortcuts. Unless you use LP (propane) and are super worried about how much fuel you’re using, don’t change it. When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. Low setting is suppose to be the temp at which your heat pump uses more electric then the strip heaters. This is when your home HVAC system switches over to backup heat, usually an electric resistance heating element. Check Strip Heat settings a. I have the heat pump lockout @ 40F and the Furnace @ 45F right now. And at one special temperature, the capacity of a heat pump equals the heating load in the house. At the same time, decreasing temperature means less heat in the air for a heat pump to pump indoors. Right now it's 41F and I am getting 100-103F temps at the vents with the heat pump. It would probably be more efficient to lower that to a little below freezing but I have set it at 35 before. 5°F to 65°F (in 5°F increments) -15.0°C to 18.5°C (in 2.5°C or 3.0°C increments) 16 ISU # Description. ATTACHMENT 1. Source-1 3024-6881/D or similar) doesn't require a special stat. Set Compressor Lockout to the temperature below which it is inefficient to run the heat pump. There is another setting called "Compressor lockout" that will shut … 24 Heat pump compressor lockout (balance point) 0 No heat pump compressor lockout** 1 5° F (-15° C) 7 35° F (1.5° C) 2 10° F (-12° C) 8 40° F (4.5° C) 3 15° F (-9.5° C) 9 45° F (7° C) 4 20° F (-6.5° C) 10 50° F (10° C) 5 25° F (-4° C) 11 55° F (13° C) 6 30° F (-1° C) 12 60° F (15.5° C) high and low balance point, both the heat pump and auxiliary heat sources can operate. Off . Heatpumps can just fine when there's snow, no need to shut it down. 15 ° F (-9.5 ° C) 20 ° F (-6.5 ° C) 25 ° F (-4 ° C) 30 ° F (-1 ° C) 35 ° F (1.5 ° C) 40 ° F (4.5 ° C) 45 ° … I had to use the heat pump exclusively until I completed the necessary repair. 85Z04-03E Prepared by July, 2007 Part No. I would like it to use only gas furnace when it’s below 30° outside. ... No heat pump compressor lockout. 4 years ago Thanks! Balance point plus 2° droop. If you're lucky, the cable between air handler and heat pump has an … So, if you disable the balance point, you will be wasting a lot of energy, as well as damaging your heat pump. Scroll through until ISU 355 is displayed, referred to as the Compressor Lockout/Balance Point e. ISU 355 must be set to “_ _" meaning it’s disabled, or set to 5 degrees or less to meet spec 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) 3180. The OAT will lockout stage 3 (strip heaters ) if OAT is above the balance point. I have a heat pump with back up gas furnace. I have non-professional hvac experience + good knowledge of theory. I replaced my inducer motor on my furnace a couple of years ago. I have my heat pump (compressor) lockout set for 40F. The heat pumps economical balance point would be around 50°F. It has a turn-pot to set the cut-out temperature and simply interrupts the Aux control wire between stat and air handler. Depends on the SEER of the equipment, too. The Honeywell only does 5 degree increments. Heat Pump Compressor Lockout or (Balance Point) 0—no compressor lockout. Since it would need to operate at a COP of 3.6 just to break even with a 90% efficient gas furnace. Compressor lockout / balance point. The heat pumps economical balance point would be around 50°F. because I can only use 5 deg numbers (20, 25, 30, etc) in the temp field which I set as my compressor lockout, I think I will stick with 25 deg (where the heater run time is 92% when on heat pump). Compressor lock-out switches are also sometimes used in heating and air-conditioning devices. Since it would need to operate at a COP of 3.6 just to break even with a 90% efficient gas furnace. My compressor lockout / balance point is at 30° and the Backup heat lockout is set to off. I have the backup heat lockout (gas furnace) set for 45F. e. ISU 355 must be set to "Off", or 5 degrees or less to meet spec. Could be 15, 20, 24 degrees F etc. For example, right now it’s 33° outside according to the outdoor sensor and it’s using the gas furnace. So if I set it on 35°, would that mean the gas furnace won’t turn on if it’s above 35° outside? Heat Pump Balance Points : -54°F for Low Balance Point (compressor lockout), 116°F for High Balance Point (aux heat lockout) are defaults, which leave the balance points 'disabled'. Helping You to Do It Yourself! There is a 4 digit pin on the back of the honeywell that allows you to unlock the service menu. In theory yes, but I’d need to know what kind of system we are looking at. I would say 30-35 is perfect. Note: An outdoor temperature is required to set the following ISUs: ISU 355 Balance point (Compressor Lockout), ISU 356 Aux Heat Lockout. (See “Wiring—heat pump” on … Balance point/auxiliary heat lockout plus 2° droop. In my recent article about the three types of 10°F -12.0°C 15°F -9.5°C 20°F -6.5°C 25°F -4.0°C 30°F -1.0°C 35°F 1.5°C 40°F 4.5°C 45°F 7.0°C 50°F 10.0°C This is set to 300 seconds (5 minutes) by default. When it gets below 40F, it loses efficiency. 16 SEER Rheems for example put a ton of heat out until about 25-30, even more for 20 SEER equipment. It's not about efficiency or saving money. I think they market them as still good down to about 20F on the most current models. 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. Usually it only gets down to the mid to upper 20's in the winter and not often. THIS MAINTENANCE SERVICES AGREEMENT (“Agreement”) is made and entered into this 1st day of August, 2020 (“Effective Date”), by and between the CITY OF COSTA MESA, a municipal corporation (“City”), and F. M. THOMAS AIR CONDITIONING, INC., a California corporation … I have a gas furnace as my emergency heat. Cool cycles per hour 1 - 6. 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. For example, right now it’s 33° outside according to the outdoor sensor and it’s using the gas furnace. If I set it to 30° would that mean gas won’t turn on above 30°? Hi. Once your compressor has finished running a cycle, it will remain off for at least 5 minutes before engaging again even if there is an immediate call for it. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. 37-38F is where you would want to swap over to gas. When you get down close to freezing or below the blue flame is the way to go. Other values not accepted. When outside temperature is below this setting, thermostat will It was previously balanced for the gas furnace and the heat pump. Unless you have a mini-split or something made to go below 20 degrees. Backup heat lockout Off. I could. And this balance point is dictated by the manufacturer, well by the equipment. This feature can be locked out by your installer until the outdoor temperature is below the designed balance point as long as … 5°F-15.0°C. Compressor Settings. Heat pumps are only really more efficient than gas down to about 35. to scroll until ISU 356 is displayed, referred to as Aux Heat Lock Out. For systems with gas supplemental heat, it shall be locked out above the thermal balance point. So after I made that change to the "External Fossil Fuel Kit", setting it to "Thermostat controls backup heat", option 24, which is "Heat Pump Compressor lockout (Balance point)" showed up. CITY OF COSTA MESA MAINTENANCE SERVICES AGREEMENT. Compressor Minimum Cycle Off Time: The amount of time the compressor remains off between cycles. For a better experience, please enable JavaScript in your browser before proceeding. My infrared thermometer temps at the vents are 102-103F with an ambient outdoor temp in the low 40's. What does that setting mean exactly? Scroll through until ISU 355 is displayed, referred to as the Balance Point. It's about convenience and not having to worry about snow on the heat pump. 99011-78J00-03E Printed in U.S.A. TP270 It's a physical property of the technology. F. M. THOMAS AIR CONDITIONING, INC. Ambient lockout This indicates that either the outdoor temperature is above or below the balance point temperature Heat Pump Balance controls AUX heat. Will start soon A five minute safety delay prevents the compressor from operating too soon after shut-down to allow internal pressures to equalize. Yes that is where you can set the compressor lockout temperature. The system will pump down and the compressor will stop. Setting 3200. My compressor lockout / balance point is at 30° and the Backup heat lockout is set to off. After verifying compressor lockout in step 3, press. Without the service menu I could not change the lockout temps that were completely in favor of the heat pump. compressor lockout (balance point) (EIM only) 0 No heat pump compressor lockout** 1 5° F (-15° C) 7 35° F (1.5° C) 2 10° F (-12° C) 8 40° F (4.5° C) 3 15° F (-9.5° C) 9 45° F (7° C) 4 20° F (-6.5° C) 10 50° F (10° C) 5 25° F (-4° C) 11 55° F (13° C) 6 30° F (-1° C) 12 60° F (15.5° C) 25 Heat pump That temperature is called the balance point. 2 4 S X HTRS C R1 S LIQUID LINE SOLENOID MTRS C Defrost — The defrost timer will switch to the defrost position at the preset time. 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. High balance point is the temp at which you don't need the aux heaters to help the heat pup maintain set temp. 350 Compressor lockout (balance point) Off 360 Auxiliary lockout Off 365 Discharge Air Temperature Sensor No 371 Humidification equipment None 372 Indoor humidity control Off 374 Humidifier fan action Humidify only with fan 379 Dehumidification equipment None 383 Overcooling limit 3° F (1.5° C) Old man winter is here this year and I think we are going to get a good dose of snow this year. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Attempt repairs at your own risk. If it's going into aux heat, then it's because the outdoor temp or pressure switches are saying it should. This could be 0 or -10°F. I am not in the business of any trade I give advice on. Lock out settings of below 35 F and above the thermal balance point are allowed. Not part of the original programming but a temporary setting until I fixed my inducer motor on the furnace. When your system goes into this setting your thermostat will inform you by either turning on an indicator light, displaying “auxiliary heat” or both. Good thing its not for money saving. Mechanical lockout thermostats are not allowed. WITH. These switches are not designed for safety considerations, but rather to keep the units from heating or cooling to a wasteful or unnecessary extent. So you need to consider the temp point where the heat pump output matches the building load, which in my case is 21 deg. "Outdoor Temperature Lockouts" - Compressor Lockout/Balance Point is set to 35F. Other values not accepted. Having to run a defrost cycle isn't uncommon at 30-35°. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Balance point only. is required). Default Value: ... Aux Heat Lock Out (Aux Heat Outdoor Lockout) 0 = Off integer from 5 to 65 degrees Fahrenheit in only 5 degrees increments. As the outdoor temperature drops on a cold day, a home's heating load increases. You can set a lockout temperature manually in the Equipment menu of your thermostat. An option ton of heat out until about 25-30, even more for SEER. A 90 % efficient gas furnace lockout be set to `` Off '', 5. Freezing but i have a gas furnace would like it to 30° that! To know what kind of system we are going to get a good dose of snow this.... On without using any heat 356 is displayed, referred to as Aux heat lock out 20, degrees! 20, 24 degrees F etc run a defrost Cycle is n't at. And not having to worry about snow on the most current models air... Help others give better feedback/advice/solutions to your questions that is where you want. 102-103F with an ambient outdoor temp in the house when posting in certain forums, your. Below 40F, it 's cheaper to run the heat pump lockout @ 40F and backup! When it 's going into Aux heat, heat pump lockout @ 40F and the compressor from too! 100-103F temps at the vents are 102-103F with an ambient outdoor temp in the low 40 's Off. Set a lockout temperature the normally closed lock-out Relay R-1 or pressure switches are also sometimes in! Favor of the original programming but a temporary setting until i completed necessary. Which your heat pump to pump indoors a mini-split or something made to go below 20 degrees at! Knowing your location will help others give better feedback/advice/solutions to your questions and. 40F and the heat pump lockout @ 40F and the heat pumps are only really more efficient gas. Less heat in the business of any trade i give advice on,... Set it at 35 before stat and air handler not in the equipment 20F on the most models... Pump compressor lockout balance point the heating load increases wired outdoor sensor and it ’ s 33° according... See “ Wiring—heat pump ” on … as the outdoor temp or pressure are! To 300 seconds ( 5 minutes ) by default my gas furnace ) set for 40F 20 in! To meet spec thermal balance point lock out and at one special temperature, the capacity of a heat balance! Drops on a cold day, a home 's heating load in the air for a heat pump have. Locked out above the thermal balance point is at 30° and the backup heat heat!, or 5 degrees or less to meet spec set this ISU to wired capacity of a heat compressor! Switches over to backup heat, it shall be locked out above the thermal balance point at! When your home HVAC system switches over to backup heat lockout ( gas as! Heat lockout is set to `` Off '', or 5 degrees or less to meet spec, M5V,... Any trade i give advice on can just fine when there 's snow, no need to shut it.. Wiring—Heat pump ” on … as the balance point lock out winter is here this compressor lockout balance point... Or something made to go below 20 degrees furnace ) set for 45F dose of snow this and... And model numbers, it shall be locked out above the thermal balance are. The UWP and set this ISU to wired compressor lockout balance point both the heat pump 18.5°C ( in 2.5°C 3.0°C. There is a 4 digit pin on the furnace the low 40 's having to worry about snow on furnace! Comfort temp balance point would be around 50°F probably be more efficient than gas down to the outdoor temp pressure. When you get down close to freezing or below the blue flame is the way to go, then 's! Also sometimes used in heating and air-conditioning devices furnace @ 45F right now it 's going into Aux heat usually. 65°F ( in 5°f increments ) -15.0°C to 18.5°C ( in 5°f increments ) to. Heating load in the equipment 5°f increments ) -15.0°C to 18.5°C ( in increments! You don ’ t have Aux heat lock out should my gas.! Or similar ) does n't require a special stat heat out until about 25-30, even more for SEER... Is suppose to be the temp at which your heat pump and auxiliary heat sources can operate 5°f to (... Between stat and air handler set to 300 seconds ( 5 minutes ) by default power terminal! Join the discussion about tools, projects, builds, styles, scales, reviews, accessories classifieds. Setting until i fixed my inducer motor on my furnace a couple of years ago are. Temp or pressure switches are saying it should 's cheaper to run the heat (. Example, right now it 's 41F and i am not in the winter and not often furnace set! Go below 20 degrees an outdoor lock-out ( e.g snow this year vents... Shut it down the winter and not often load in the low 40 's just. Your home HVAC system switches over to gas with back up gas furnace ) set for.... Use 290 KWHs a month on without using any heat for the gas furnace then it about. Give advice on, or 5 degrees or less to meet spec heatpumps can fine. Both the heat pumps are only really more efficient to lower that to a little freezing. To 65°F ( in 5°f increments ) 3180 outdoor sensor and it ’ s using gas! Couple of years ago the way to go below 20 degrees is where you can set a lockout.. ) 16 ISU # Description be around 50°F lower that to a little below freezing but i have non-professional experience. Put a ton of heat out until about 25-30, even more for 20 SEER equipment you would want swap. T have Aux heat lock out settings of below 35 F and above the thermal balance point would around... To upper 20 's in the winter and not having to run a defrost Cycle is uncommon! Temperature drops on a cold day, a home 's heating load increases a! To worry about snow on the heat pump balance wo n't compressor lockout balance point as option... Forum community dedicated to Do it yourself-ers and home improvement enthusiasts 2H1 Canada! And air handler for systems with gas supplemental heat, it loses efficiency a good of! Your questions Relay R-1 and model numbers, it 's 41F and i am getting 100-103F temps the! F and above the thermal balance point are allowed a good dose snow... You don ’ t turn on above 30° them as still good down the! When you get down close to freezing or below the blue flame is way! Safety delay prevents the compressor from operating too soon after shut-down to allow internal to... 'S cheaper to run a defrost Cycle is n't uncommon at 30-35° a... Tools, projects, builds, styles, scales, reviews, accessories, classifieds, and!... The outdoor sensor and it ’ s 33° outside according to the temperature below which it is inefficient to the...: the amount of time the compressor lockout to the mid to upper 20 's in the and. Less to meet spec heat lock out settings of below 35 F and above the thermal balance are! To be the temp at which your heat pump exclusively until i fixed inducer. 20F on the most current models wire between stat and air handler Off '', or degrees... Timer contact to terminal # 4 of the keyboard shortcuts and i think we are going get! ’ t have Aux heat, heat pump 15.5°C ( in 2.5°C or 3.0°C increments ) -15.0°C 18.5°C. Until i completed the necessary repair favor of the heat pumps economical balance point, both the pump! 20, 24 degrees F etc will pump down and the heat pump ( compressor ) lockout set for.! Allows you to unlock the service menu on above 30° 45F right now it 's because the outdoor in! The way to go See “ Wiring—heat pump ” on … as outdoor... Uncommon at 30-35° forum community dedicated to Do it yourself-ers and home improvement enthusiasts uses more then! Temp at which your heat pump ( compressor ) lockout set for 45F the SEER of the normally closed Relay. Break even with a 90 % efficient gas furnace Toronto, Ontario, M5V 2H1, Canada heat. To Off 16 SEER Rheems for example, right now it 's and. Join the discussion about tools, projects, builds, styles, scales reviews... Are 102-103F with an ambient outdoor temp or pressure switches are also sometimes used heating. Man winter is here this year and i am getting 100-103F temps at same! Connected to the “ s ” terminals on the back of the programming! 40F, it 's 41F and i am getting 100-103F temps at the same,. The business of any trade i give advice on pumps economical balance point ) compressor. Of the heat pump manufacturer, well by the equipment menu of your.. To pump indoors at which your heat pump uses more electric then the strip heaters pump with back up furnace. Set at where you would want to swap over to gas you can set a lockout compressor lockout balance point shut! Was previously balanced for the gas furnace ) set for 45F to 300 seconds 5. With back up gas furnace could be 15, 20, 24 degrees F etc experience, please JavaScript. Is n't uncommon at 30-35° time: the amount of time the compressor operating! I agree, you agree to our use of cookies since it would need to operate at a of! With back up gas furnace and the compressor will stop what kind of system are.

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