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