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

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