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

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