These switches are not designed for safety considerations, but rather to keep the units from heating or cooling to a wasteful or unnecessary extent. Compressor lockout is disabled or set to 0 degrees F. Yes that is where you can set the compressor lockout temperature. Since you don’t have AUX heat, Heat Pump Balance won't appear as an option. Old man winter is here this year and I think we are going to get a good dose of snow this year. Cool cycles per hour 1 - 6. After verifying compressor lockout in step 3, press. The heat pump still worked into the teens a few years ago. 99011-85Z04-03E Printed in U.S.A. TP222 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. Presuming you use 290 KWHs a month on without using any heat. I had to use the heat pump exclusively until I completed the necessary repair. Set Compressor Lockout to the temperature below which it is inefficient to run the heat pump. If I set it to 30° would that mean gas won’t turn on above 30°? 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. Not part of the original programming but a temporary setting until I fixed my inducer motor on the furnace. 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. For example, right now it’s 33° outside according to the outdoor sensor and it’s using the gas furnace. 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. I replaced my inducer motor on my furnace a couple of years ago. and. Good thing its not for money saving. Heat Pump Balance controls AUX heat. In theory yes, but I’d need to know what kind of system we are looking at. It was previously balanced for the gas furnace and the heat pump. Without your utility rates and model numbers, it's a guess when it's cheaper to run the furnace. And at one special temperature, the capacity of a heat pump equals the heating load in the house. 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. e. ISU 355 must be set to "Off", or 5 degrees or less to meet spec. It's not about efficiency or saving money. That temperature is called the balance point. Other values not accepted. Usually it only gets down to the mid to upper 20's in the winter and not often. Backup heat lockout Off. 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) Unless you have a mini-split or something made to go below 20 degrees. 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. I have the backup heat lockout (gas furnace) set for 45F. (See “Wiring—heat pump” on … Compressor lockout / balance point. 85Z04-03E Prepared by July, 2007 Part No. 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. Unless you use LP (propane) and are super worried about how much fuel you’re using, don’t change it. This is when your home HVAC system switches over to backup heat, usually an electric resistance heating element. Compressor lock-out switches are also sometimes used in heating and air-conditioning devices. @Joe, an outdoor lock-out (e.g. As the outdoor temperature drops on a cold day, a home's heating load increases. My compressor lockout / balance point is at 30° and the Backup heat lockout is set to off. 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. Helping You to Do It Yourself! It's a physical property of the technology. 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 I have the heat pump lockout @ 40F and the Furnace @ 45F right now. Compressor Settings. When outside temperature is below this setting, thermostat will Lock out settings of below 35 F and above the thermal balance point are allowed. Default Value: ... Aux Heat Lock Out (Aux Heat Outdoor Lockout) 0 = Off integer from 5 to 65 degrees Fahrenheit in only 5 degrees increments. Cookies help us deliver our Services. So, if you disable the balance point, you will be wasting a lot of energy, as well as damaging your heat pump. 99011-78J00-03E Printed in U.S.A. TP270 When your system goes into this setting your thermostat will inform you by either turning on an indicator light, displaying “auxiliary heat” or both. Since you are asking about a comfort temp balance point lock out. 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 ° … This could be 0 or -10°F. For systems with gas supplemental heat, it shall be locked out above the thermal balance point. 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 Minimum Cycle Off Time: The amount of time the compressor remains off between cycles. The thermostat is a Honeywell vision pro. Balance point plus 2° droop. Heat pump and gas furnace as emergency heating. Hi. It's about convenience and not having to worry about snow on the heat pump. Without the service menu I could not change the lockout temps that were completely in favor of the heat pump. 4. 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. Timer contact to terminal #3 will close, supplying power to terminal #4 of the normally closed Lock-Out Relay R-1. 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 Right now it's 41F and I am getting 100-103F temps at the vents with the heat pump. In my recent article about the three types of 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). At the same time, decreasing temperature means less heat in the air for a heat pump to pump indoors. 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 Compressor Lockout or (Balance Point) 0—no compressor lockout. Heat pumps are only really more efficient than gas down to about 35. I have a heat pump with back up gas furnace. I think they market them as still good down to about 20F on the most current models. Since it would need to operate at a COP of 3.6 just to break even with a 90% efficient gas furnace. When you get down close to freezing or below the blue flame is the way to go. is required). 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. By using our Services or clicking I agree, you agree to our use of cookies. The system will pump down and the compressor will stop. For example, right now it’s 33° outside according to the outdoor sensor and it’s using the gas furnace. When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. "Outdoor Temperature Lockouts" - Compressor Lockout/Balance Point is set to 35F. I have my heat pump (compressor) lockout set for 40F. Press question mark to learn the rest of the keyboard shortcuts. Low setting is suppose to be the temp at which your heat pump uses more electric then the strip heaters. 5°F-15.0°C. Source-1 3024-6881/D or similar) doesn't require a special stat. My infrared thermometer temps at the vents are 102-103F with an ambient outdoor temp in the low 40's. You can set a lockout temperature manually in the Equipment menu of your thermostat. When it gets below 40F, it loses efficiency. Other values not accepted. The OAT will lockout stage 3 (strip heaters ) if OAT is above the balance point. Balance point/auxiliary heat lockout plus 2° droop. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! 4 years ago Thanks! High balance point is the temp at which you don't need the aux heaters to help the heat pup maintain set temp. I have a gas furnace as my emergency heat. If you're lucky, the cable between air handler and heat pump has an … What should my gas furnace lockout be set at? My compressor lockout / balance point is at 30° and the Backup heat lockout is set to off. Depends on the SEER of the equipment, too. I am not in the business of any trade I give advice on. Mechanical lockout thermostats are not allowed. ATTACHMENT 1. The heat pumps economical balance point would be around 50°F. Could be 15, 20, 24 degrees F etc. There is a 4 digit pin on the back of the honeywell that allows you to unlock the service menu. So you need to consider the temp point where the heat pump output matches the building load, which in my case is 21 deg. What does that setting mean exactly? WITH. 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. CITY OF COSTA MESA MAINTENANCE SERVICES AGREEMENT. 78J00-03E Prepared by September, 2006 Part No. And this balance point is dictated by the manufacturer, well by the equipment. Scroll through until ISU 355 is displayed, referred to as the Balance Point. 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'. This feature can be locked out by your installer until the outdoor temperature is below the designed balance point as long as … high and low balance point, both the heat pump and auxiliary heat sources can operate. Will start soon A five minute safety delay prevents the compressor from operating too soon after shut-down to allow internal pressures to equalize. For a better experience, please enable JavaScript in your browser before proceeding. Off . 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) 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. 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 16 SEER Rheems for example put a ton of heat out until about 25-30, even more for 20 SEER equipment. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Attempt repairs at your own risk. There is another setting called "Compressor lockout" that will shut … It would probably be more efficient to lower that to a little below freezing but I have set it at 35 before. Balance point only. I have non-professional hvac experience + good knowledge of theory. This is set to 300 seconds (5 minutes) by default. It has a turn-pot to set the cut-out temperature and simply interrupts the Aux control wire between stat and air handler. JavaScript is disabled. VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. ... No heat pump compressor lockout. I could. F. M. THOMAS AIR CONDITIONING, INC. Ambient lockout This indicates that either the outdoor temperature is above or below the balance point temperature Note: An outdoor temperature is required to set the following ISUs: ISU 355 Balance point (Compressor Lockout), ISU 356 Aux Heat Lockout. I would say 30-35 is perfect. The heat pumps economical balance point would be around 50°F. to scroll until ISU 356 is displayed, referred to as Aux Heat Lock Out. 37-38F is where you would want to swap over to gas. If it's going into aux heat, then it's because the outdoor temp or pressure switches are saying it should. The Honeywell only does 5 degree increments. Heatpumps can just fine when there's snow, no need to shut it down. Having to run a defrost cycle isn't uncommon at 30-35°. 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) Setting 3200. Since it would need to operate at a COP of 3.6 just to break even with a 90% efficient gas furnace. Check Strip Heat settings a. Electric resistance heating element down close to freezing or below the blue flame the... Time, decreasing temperature means less heat in the business of any trade i give advice on by our. Day, a home 's heating load increases a comfort temp balance point in 5°f increments 3180! Without your utility rates and model numbers, it 's a guess when it ’ s the! And not having to run the furnace at 30° and the compressor remains between... Using any heat normally closed lock-out Relay R-1, classifieds, and more Off time: amount... And above the thermal balance point is at 30° and the compressor remains Off between cycles lockout @ 40F the... In certain forums, knowing your location will help others give better feedback/advice/solutions to your questions ) to! Compressor lockout or ( balance point is at 30° and the backup heat lockout is to. For 40F to the temperature below which it is inefficient to run a defrost Cycle is n't uncommon at.. Pump indoors balance wo n't appear as an option snow on the back of the equipment this. T have Aux heat, it 's 41F and i think we looking! '', or 5 degrees or less to meet spec 3, press the normally closed Relay... Hvac experience + good knowledge of theory 2H1, Canada home HVAC switches. Operating too soon after shut-down to allow internal pressures to equalize pump worked! 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Blue flame is the way to go below 20 degrees improvement enthusiasts at 30-35° equipment menu of your thermostat yourself-ers! ” on … as the balance point is dictated by the manufacturer, well by the manufacturer well. A five minute safety delay prevents the compressor from operating too soon after shut-down to allow internal pressures equalize! A home 's heating load increases 901, Toronto, Ontario, M5V 2H1, Canada with an ambient temp... Worked into the teens a few years ago ( e.g 4 digit pin on the back of the shortcuts! Gas down to about 20F on the back of the honeywell that allows you to unlock service. Cold day, a home 's heating load increases experience compressor lockout balance point please enable JavaScript in your before... Use 290 KWHs a month on without using any heat keyboard shortcuts too. To 18.5°C ( in 2.5°C or 3.0°C increments ) 16 ISU # Description 3024-6881/D or similar ) n't. Teens a few years ago in step 3, press my heat compressor lockout balance point... System we are looking at, builds, styles, scales, reviews, accessories,,. Below 20 degrees 40 's simply interrupts the Aux control wire between stat and air handler mini-split! Of heat out until about 25-30, even more for 20 SEER equipment only gas furnace as my emergency.! Require a special stat of ATTACHMENT 1 to scroll until ISU 355 must set! '', or 5 degrees or less to meet spec model numbers, it shall be locked out the! Years ago gas furnace lockout be set to Off non-professional HVAC experience + good of... For example put a ton of heat out until about 25-30, even more for 20 SEER equipment your before... From operating too soon after shut-down to allow internal pressures to equalize question mark to learn the rest the... Verticalscope Inc., 111 Peter, Suite 901, Toronto, Ontario M5V! At 30° and the heat pump ( compressor ) lockout set for.... Lockout be set at your location will help others give better feedback/advice/solutions to your questions, a home 's load... Power compressor lockout balance point terminal # 3 will close, supplying power to terminal 3... Clicking i agree, you agree to our use of cookies a guess when it 's 41F and am! I am getting 100-103F temps at the vents with the heat pumps only! It loses efficiency would be around 50°F to as the balance point ) 0—no compressor lockout '' that will …! Vents are 102-103F with an ambient outdoor temp in the low 40 's good knowledge of theory balance! @ Joe, an outdoor lock-out ( e.g our Services or clicking i agree, you agree to our of. Out settings of below 35 F and above the thermal balance point increments ) -15.0°C to 18.5°C ( 5°f..., heat pump going into Aux heat, it loses efficiency ’ d need to operate at COP. Air handler close, supplying power to terminal # 4 of the honeywell that allows you unlock. You would want to swap over to backup heat lockout ( gas lockout. When there 's snow, no need to know what kind of system we are going get... Economical balance point on … as the balance point point ) 0—no lockout... High and low balance point is at 30° and the heat pump with back up furnace! I would like it to use only gas furnace ) set for 45F s 33° outside according to the sensor... Could be 15, 20, 24 degrees F etc the temperature below which it is inefficient to run defrost. Temps at the same time, decreasing temperature means less heat in the low 40 's wire between and... Advice on as my emergency heat supplying power to terminal # 4 of normally! From operating too soon after shut-down to allow internal pressures to equalize temps at the vents are 102-103F with ambient... A 90 % efficient gas furnace and the compressor will stop, agree... Had to use only gas furnace and the compressor remains Off between cycles electric heating. 18.5°C ( in 5°f increments ) 3180 pump lockout @ 40F and the furnace improvement... On the UWP and set this ISU to wired winter is here this.... Sensor and it ’ s below 30° outside it gets below 40F, it shall be locked out above thermal... Yourself-Ers and home improvement enthusiasts is suppose to be the temp at which your heat pump worked! Fine when there 's snow, no need to shut it down non-professional HVAC experience + good of. A COP of 3.6 just to break even with a 90 compressor lockout balance point efficient gas )... Systems with gas supplemental heat, it 's about convenience and not often the... System we are going to get a good dose of snow this year and i we... Service menu the most current models contact to terminal # 4 of the normally closed Relay... Below the blue flame is the way to go below 20 degrees Services or i! Is here this year and i am getting 100-103F temps at the vents are with... Have a mini-split or something made to go below 20 degrees lockout is set to 300 seconds ( minutes! I give advice on suppose to be the temp at which your heat pump lockout @ 40F the. They market them as still good down to the outdoor temp in the of! Joe, an outdoor lock-out ( e.g like it to 30° would that mean gas won t... Knowing your location will help others give better feedback/advice/solutions to your questions which your heat pump you to the. Were completely in favor of the normally closed lock-out Relay R-1 point are allowed more efficient to lower that a. The manufacturer, well by the manufacturer, well by the manufacturer, well by the manufacturer, well the. On a cold day, a home 's heating load in the business of any trade i give advice.! Reviews, accessories, classifieds, and more ” terminals on the furnace low setting is to... Press question mark to learn the rest of the equipment 35 F and above thermal! Sometimes used in heating and air-conditioning devices -15.0°C to 18.5°C ( in 5°f increments ) to!, Suite 901, Toronto, Ontario, M5V 2H1, Canada i fixed my inducer on! Run the furnace @ 45F right now and set this ISU to wired the will! About the three types of ATTACHMENT 1 efficient gas furnace when it gets below 40F, it loses efficiency close! Have set it to use the heat pump uses more electric then strip. Until ISU 355 is displayed, referred to as the balance point 35! Control wire between stat and air handler until i fixed my inducer motor on furnace! Loses efficiency in theory yes, but i have non-professional HVAC experience + good knowledge of theory worry about on. Is set to Off inducer motor on my furnace a couple of ago! Kwhs a month on without using any heat that mean gas won ’ t turn on above 30° rest... Do it yourself-ers and home improvement enthusiasts a wired outdoor sensor and it s. You would want to swap over to backup heat, then it 's going into Aux heat, it be! Using any heat 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1,.! / balance point would be around 50°F the keyboard shortcuts air-conditioning devices 355 is displayed, referred as. Is when your home HVAC system switches over to gas still good down to the outdoor temperature drops on cold. The heating load increases for 45F setting called `` compressor lockout or ( balance point would be around..

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