For additional guidance on installing your ecobee3 lite please click here. Some digital thermostats use batteries for power. If you are changing an older mercury thermostat, make sure you dispose of it properly. As with LEDs, a common cause of power supply failure is heat. Follow the basic thermostat wiring instructions for those wires. We also use third-party cookies that help us analyze and understand how you use this website. of 8000. If it doesn’t cost too much, I always advise the customer to rewire for a single transformer. If you get confused, call in a professional. We have other articles here that will help you with thermostat wiring. The instruction guide should help you navigate through the settings to make the appropriate changes to the thermostat so it will function properly as a heat pump thermostat. Take A Sneak Peak At The Movies Coming Out This Week (8/12) Celebrate Mardi Gras: Music, Movies, TV Shows and…house floats?! aux is what the heat pump can’t cover. ecobee wouldn't help me out at all on the bill. Necessary cookies are absolutely essential for the website to function properly. Wiring a heat pump is different than wiring an air conditioner with a gas furnace or boiler. That is even providing for the C wire. That is the power to energize the control relays and contactors in your system. – Ecobee Thermostat – Emerson Thermostat – Honeywell Thermostat – Hunter Thermostat – Lennox Thermostat – Lux Thermostat – Nest Thermostat – Nuheat Thermostat – Robertshaw Thermostat – Trane Thermostat – Totaline Thermostat – Venstar Thermostat – York Thermostat – White Rodgers Thermostat – Other troubleshooting the whole process was a breeze and customer … The thermostat is simply a switch, and the power originates from the transformer through this terminal. If your old thermostat had the black wire on O terminal then I would keep the black on the O for the reversing valve terminal. Finally, the thermostat needs the power to function. These cookies do not store any personal information. In a heat pump, this is for heating and cooling. They were simple mechanical thermostats with a mercury switching mechanism inside. I can send my wiring schematic if needed to help view my intention. Colors for these terminals vary, but in most cases, W2 will be black and Y2 will be light blue. Required fields are marked *. Furthermore, the color for the C Wire will typically be dark blue. Heat pumps provide heating and cooling for a home or business. This control for the reversing valve in the condensing unit. The control transformer in the heating system will have a red wire terminated at the RH. C Wire Designation and Terminal - the old C wire? How to Wire a Heat Pump for Control - There may be a time when you will want to change your old heat pump thermostat with a new heat pump thermostat. The R wire needs to go into Stage 2 heat and cool automatically. Before doing any wiring for your thermostat or otherwise, always make sure you turn off the power at the breaker and the air handler/condenser. * If you have 2-wire heat only boiler or furnace system, you'll find additional installation instructions via the following articles: Need more help? This website uses cookies to improve your experience. I am thinking hooking line voltage to relay and 24v stat and looping in fan. This category only includes cookies that ensures basic functionalities and security features of the website. It is sometimes referred to as auxiliary heating, and it is used in case something goes wrong with the condensing unit. This wire will also run to the air handler/furnace and the condenser. 4 models, 15.5-20 SEER, single-stage, two-stage and variable capacity. Gas Heating Troubleshooting and Repair Index, Variations for Heat Pump Thermostat Wiring, Heat Pump Thermostat Wiring Designations / Terminals and Colors (Thermostat Wiring Colors are Industry Standard (typical)), Heat Pump Thermostat Wiring Schematic Diagram, Other R Wire Terminal Designations and Wires, Other Heat Pump Control Terminals and Wiring Designations, Auxiliary Thermostat Wiring for Heat Pump Thermostats, Conclusion | How to Wire a Heat Pump for Control – Heating and Cooling, heat pump needs a supplemental heat source, older mercury thermostat, make sure you dispose of it properly, two transformers powering a single thermostat, Blank Display Problem – Screen Disappeared, Honeywell Heat Pump Thermostat Troubleshooting, How Can I Tell 1 or 2 Transformers for Heating Cooling System, How to Wire an Air Conditioner for Control – 5 Wires, HVAC Products Containing Mercury and Proper Disposal, Thermostat Wiring Instructions not Matching New, What Temperature Should I Set My Programmable To, Wiring a Programmable for Geothermal Heat Pump, If the temperature falls below a certain point, the, Always change your air filter on a monthly basis, Make sure all your supply vents are open and unobstructed, Keep area clean around indoor unit especially the return grills. Get in touch with our support team. In most cases, if you are changing your thermostat, you do not have to worry about any wiring at the condenser. To have a complete circuit, you need a source, a path, and a load. In that case, you will not need to worry about a C-wire or as it is sometimes labeled C1 wire. If you have a humidifier for home humidification and an electronic air cleaner for cleaner air, there will be some extra wires for those devices. Does NOT work with Electric Baseboard Heat (120-240V), Heat Pumps with Gas Backup or Multi-Stage Heating/Cooling › See more product details The R wire needs to go into Stage 2 compressor and the Rc terminal on your ecobee. You also have the option to opt-out of these cookies. That applies to Honeywell, Emerson, Ecobee, Nest, White Rodgers and all other modern thermostats that are digital. He turned the heat back on by putting on the old thermostat. How to Wire a Heat Pump for Control - There may be a time when you will want to change your old heat pump thermostat with a new heat pump thermostat. Your email address will not be published. Consequently, this means if you don’t have the right amount of wires at the thermostat, you would need to run new thermostat wire to the new thermostat. Moreover, one side is for line voltage into the transformer, and the other side is the 24-volt control voltage coming out the other side of the transformer (see illustration above right). Honeywell THX9421R5021WW - Prestige IAQ HD Thermostat (White Front/White Side) - Note: Unit Requires EIM (THM5421R1021)
The Prestige® IAQ thermostat is a 2 wire high definition color touch screen thermostat, 7 day programmable and selectable for residential or light commercial use. 4 models, 13-17 SEER. It is because all neutrals are the same (in most cases). And running a power supply at full capacity will heat it up. These thermostats are designed to handle separate systems that each have their control transformer. Furthermore, it will be cheaper, in the long run, to get a professional HVAC technician to do this for you rather than burn something up for miswiring. Anyhow, these thermostats never required a C wire, so a newer modern thermostat would require an extra wire (the C wire) to work properly. Quality temperature control for heat pump with auxiliary heat. Dual fuel systems with a furnace and heat pump are 24-volt / low-voltage systems. The aluminized steel heat exchanger passes lower manufacturing costs along to the consumer, is incredibly durable and is protected by a full 10 year warranty by Modine. On 2020-01-21 by (mod) - The wire is needed for most brands and models including ecobee and Honeywell Lyric. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It shows they are paying attention. 20,000 btu minus the aux. The reason for this is most modern thermostats require or need a C wire to function. The most common need for additional wiring when installing an ecobee comes from the lack of a C wire. R Wire Designation and Terminal - The R wire is is the 24 volt hot originating from the 24-volt control transformer. W2, AUX and or E (Emergency) wiring connections will normally connect to the ecobee3 W1 terminal. Most transformers in either system can handle the VA rating required to power all controls in both systems, and the re-wiring is simple (at least for me it is). W Wire Terminal Designation - This color is typically white and goes to the W terminal. That is, specifically, so you will have the correct number of conductors to make the new thermostat work properly. They asked me for a picture of the old thermostat wiring and a picture for the wiring that was coming out of my HVAC room, and then sent me a diagram to my email address explaining which wires I should connect where. In some cases, depending on your system, W2 can be used simply for emergency heat, which is your backup heat source. The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. *Always follow the manufacturers wiring instructions concerning this. In this case, the transformer is the source, the R wire, and the C wire, is the path, and the thermostat is the load. These other articles help you with thermostat wiring colors and thermostat wiring diagrams. If you only have a single transformer, then you will likely have a jumper wire (or brass strip) between the RH and RC terminals. It is mandatory to procure user consent prior to running these cookies on your website. For those with a power stealing thermostat (without batteries), the is also where the thermostat gets its power. A control transformer for an HVAC system has 4 wires. Thermostat Wiring Diagrams for Heat Pumps - Heat Pump Thermostat Wire Diagrams. This website uses cookies to improve your experience while you navigate through the website. The power supply must be the same voltage as the LED strip. Additionally, changing an older mechanical thermostat to a newer digital thermostat will require some extra wiring that also may require you to pull new wire to the thermostat from the air handler. That is if you have a modern digital thermostat that doesn’t require batteries. Copyright© 2021 HighPerformanceHVAC.com |. Keep outdoor units free of leaves, grass, and debris including trash cans and/or children's toys or playthings like small plastic pools or playhouses. Click to get the latest Buzzing content. Y Wire Terminal Designation - This color is usually a yellow wire and goes to the Y terminal. A 96% efficient gas furnace loses 4% of the heat created by burning the gas to exhause outside your home. BTW, mercury has been banned by the federal gubmint )) as a product that cannot be used in HVAC products. A: Varies: Sends signal that the heating or cooling cycle is active. The reason for all the consternation mentioned above is that many older thermostats did not require a C wire. 20,000= 5.9kw minus 2.5 kw = 3.5 kw emergency element and a 2.5 kw auxiliary element. The next most common backup heating source is a gas furnace. These diagrams are also available within the ecobee3 lite Installation Guide included with your ecobee3 lite thermostat. So not only did this stop working after 2 days but I also had a $100 repair bill from the HVAC company. Best: Dave Lennox Signature Collection. O Wire Terminal Designation - This color is typically orange and goes to the O terminal (in Rheem and Ruud, it goes to the B terminal). Additionally, air source heat pumps have backup methods of heating for two reasons. More than 90% of all HVAC (Heating, Ventilation, Air Conditioning) systems are low voltage 24V systems. ... Heat pump with 1 stage of auxiliary heat. Better: Lennox Elite Series. Furthermore, you can cause serious damage to your system for not doing so. The reversing valve switches the condenser from heating to cooling and vice versa, depending on the thermostat setting. Finally, both of these different methods can require a separate way of wiring your heat pump thermostat. Once Upon a Pre-Pandemic Time in Hollywood Here is a breakdown of the models and our recommendations. The most basic method of backup or supplemental heating for heat pumps is electric heat strips. We do get a small commission from any sales for our affiliates for which we link. by High Performance HVAC | Thermostats | 1 comment. If you do not have the jumper, you will separate red wires. Most residential systems that are staged are two-stage systems. Single-stage. Then terminate the extra wire to the Aux/E/W2*. In a heat pump, this is for the backup heat source. There other possible wiring configurations for your heat pump thermostat wiring, but these are the basics. To download the complete ecobee3 lite Installation Guide please click here. Your email address will not be published. The following wiring diagrams are for the ecobee3 lite thermostat and common HVAC equipment configurations. Mercury is very toxic to the environment. thanks tim. Additionally your service technician will appreciate you not planting holly bushes near the outside unit, Lastly have system serviced every six months - once for heating and once for cooling before the season starts. It energizes the compressor contactor in the condenser. There are many variations to wiring a heat pump for control because there are many types of heat pumps. On most heat pump wiring, the white is the 1st stage of electric heat and black is usually emergency or the 2nd stage of electric heat. 5 (R, G, Y, O, W) Yes. We'll assume you're ok with this, but you can opt-out if you wish. It is not designed for use with line- ... Heat pump with auxiliary heat (up to four stages) Yes Geothermal Heat Pump Yes These links will lead to you purchase a product from another company. Finally, the color of the R wire is typically red. Take A Sneak Peak At The Movies Coming Out This Week (8/12) Britney Spears through the years: a look back at her greatest red carpet moments A heat pump thermostat requires more conductors than an air conditioner thermostat. This is because a heat pump pulls heat out of the air so it can be more than 100% efficient. The defrost control board in the condenser will automatically defrost the system. There are extra controls in heat pumps that require extra attention and understanding to get the wiring correct. With a standard footprint and simple interface, the T Series will enhance the entire thermostat experience for you and your customers alike. Many thermostats have RC and RH instead of a single R terminal. The HVAC technician bypassed the ecobee and was able to see the furnace was fine and the problem was with the thermostat. 24v side of relay to stat and also send 24v signal to taco priority zoning pump r/w contacts to activate pump on call for heat from stat. The C wire 24-volt common and it originates from the control transformer also as with the R wire mentioned above. In this article, we will provide specific information for wiring a heat pump for control. X or Aux: Varies: Back-up Heating on Heat Pumps: Used to initiate an auxiliary heat source, which is usually located in the air handler. Emergency Heating on Heat Pumps: Used to trigger the emergency heat source in case the heat pump's condenser isn't working. What does this mean? This commission helps us pay for the overhead of running this website. We would like to show you a description here but the site won’t allow us. ecobee3 manages auxiliary heating through the W1 & W2 (if there is more than 1-stage of aux heat… But opting out of some of these cookies may have an effect on your browsing experience. These cookies will be stored in your browser only with your consent. In some cases, you will have a system that requires staging. You can’t have two transformers powering a single thermostat. Something newly installed thermostats require a setup specifically for a heat pump. Depending on your system, the Power Extender Kit (PEK) included in the box with every ecobee may be able to provide a C wire connection. Lastly, always make sure to follow the instructions for the thermostat manufacturer for wiring and setup. Whether it is electric heat strips or a gas furnace (dual fuel), the W terminal controls this. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. That is the common wire, and it has caused many people indigestion and sleepless nights. say your heating load is 20,000 btu , and your heat pump is rated 12,000, your aux would be sized to cover 8,000 btu (8000 divided by 3.413) I had an apprentice ask me one time why is only one common wire or c wire used in this situation. The proprietary blend of specialty detergents will liquify heavily embedded grease and grime to restore heat transfer and increase the efficiency of the coil. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Page 33 Heat Pump Air Handler NOTE: NOTE: Do not jumper Rc or Rh, ecobee does this Do not jumper Rc or Rh, ecobee does this automatically. Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and cool.While an air conditioner uses the process of refrigeration to only cool, the central air conditioner will usually be paired with a gas furnace, an electric furnace, or some other method of heating. Furthermore, the control transformer for the cooling system will have a red wire terminated at the RC terminal. If your old thermostat uses two separate wires and they were terminated at Aux and E separately, then use a wire and an extra wire to bundle these wires together. Single-stage, two-stage and variable capacity. In some cases, the terminal for the thermostat will be labeled Aux/E/W2. We have other articles here that will help you with thermostat wiring.These other articles help you with thermostat wiring colors and thermostat wiring diagrams.In this article, we will provide specific information for wiring a heat pump for control. Additionally, this information should be provided to you with the thermostat instructions. Emergency must be sized to carry the entire load in event of heat pump failure. Nearly every manufacturer is different and will have different instructions for wiring to get it right. Problem: Fan will not come on in the “ON” position or your fan will not come on when you turn the thermostat down in the air conditioning mode.. Viper Condensate Pan and Drain Treatment is a … How to Wire a Heat Pump for Control - Thermostat Wiring Guide, Resource: The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. The extra capacity will help to insure a long life for the power supply. Monday, February 15(Ontario Family Day)9 a.m. to 9 p.m. EST, Thermostat Installation & Wiring Diagrams, Heat only 2-wire boiler/furnace installations, 2-Wire Boiler System wiring (T & T connections). View Wiring Diagram 28 Contractor Info 28 Reset Installation Settings 29 ... ecobee is designed to operate low-voltage heating and cooling systems. When it goes into defrost mode, the backup heat is energized. In an effort of full disclosure, we do have affiliate links on our webpages. Great question, especially from an apprentice beginning his career in HVAC. In this case, you will need a thermostat that has a W2 terminal and a Y2 terminal. or 2.5kw. This diagram illustrates the wiring connections for a heat-pump system with auxiliary heating. Lastly, they need the C wire to complete the circuit and have power. Heat pumps use the process of refrigeration to move heat in one direction or another depending on the season and the setting of the thermostat. Hopefully, these are explained in a way that will help you understand the wiring. Lennox makes 11 central air conditioners in three series: Basic: Lennox Merit Series. Mercury free thermostat For use with heat pumps only Ships at 8.8-ounces. 3 models, 18.5-26 SEER. Power supply voltage must match the LEDs.
The Prestige® IAQ thermostat is a 2 wire high definition color touch screen thermostat, 7 day programmable and selectable for residential or light commercial use. 4 models, 13-17 SEER. It is because all neutrals are the same (in most cases). And running a power supply at full capacity will heat it up. These thermostats are designed to handle separate systems that each have their control transformer. Furthermore, it will be cheaper, in the long run, to get a professional HVAC technician to do this for you rather than burn something up for miswiring. Anyhow, these thermostats never required a C wire, so a newer modern thermostat would require an extra wire (the C wire) to work properly. Quality temperature control for heat pump with auxiliary heat. Dual fuel systems with a furnace and heat pump are 24-volt / low-voltage systems. The aluminized steel heat exchanger passes lower manufacturing costs along to the consumer, is incredibly durable and is protected by a full 10 year warranty by Modine. On 2020-01-21 by (mod) - The wire is needed for most brands and models including ecobee and Honeywell Lyric. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It shows they are paying attention. 20,000 btu minus the aux. The reason for this is most modern thermostats require or need a C wire to function. The most common need for additional wiring when installing an ecobee comes from the lack of a C wire. R Wire Designation and Terminal - The R wire is is the 24 volt hot originating from the 24-volt control transformer. W2, AUX and or E (Emergency) wiring connections will normally connect to the ecobee3 W1 terminal. Most transformers in either system can handle the VA rating required to power all controls in both systems, and the re-wiring is simple (at least for me it is). W Wire Terminal Designation - This color is typically white and goes to the W terminal. That is, specifically, so you will have the correct number of conductors to make the new thermostat work properly. They asked me for a picture of the old thermostat wiring and a picture for the wiring that was coming out of my HVAC room, and then sent me a diagram to my email address explaining which wires I should connect where. In some cases, depending on your system, W2 can be used simply for emergency heat, which is your backup heat source. The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. *Always follow the manufacturers wiring instructions concerning this. In this case, the transformer is the source, the R wire, and the C wire, is the path, and the thermostat is the load. These other articles help you with thermostat wiring colors and thermostat wiring diagrams. If you only have a single transformer, then you will likely have a jumper wire (or brass strip) between the RH and RC terminals. It is mandatory to procure user consent prior to running these cookies on your website. For those with a power stealing thermostat (without batteries), the is also where the thermostat gets its power. A control transformer for an HVAC system has 4 wires. Thermostat Wiring Diagrams for Heat Pumps - Heat Pump Thermostat Wire Diagrams. This website uses cookies to improve your experience while you navigate through the website. The power supply must be the same voltage as the LED strip. Additionally, changing an older mechanical thermostat to a newer digital thermostat will require some extra wiring that also may require you to pull new wire to the thermostat from the air handler. That is if you have a modern digital thermostat that doesn’t require batteries. Copyright© 2021 HighPerformanceHVAC.com |. Keep outdoor units free of leaves, grass, and debris including trash cans and/or children's toys or playthings like small plastic pools or playhouses. Click to get the latest Buzzing content. Y Wire Terminal Designation - This color is usually a yellow wire and goes to the Y terminal. A 96% efficient gas furnace loses 4% of the heat created by burning the gas to exhause outside your home. BTW, mercury has been banned by the federal gubmint )) as a product that cannot be used in HVAC products. A: Varies: Sends signal that the heating or cooling cycle is active. The reason for all the consternation mentioned above is that many older thermostats did not require a C wire. 20,000= 5.9kw minus 2.5 kw = 3.5 kw emergency element and a 2.5 kw auxiliary element. The next most common backup heating source is a gas furnace. These diagrams are also available within the ecobee3 lite Installation Guide included with your ecobee3 lite thermostat. So not only did this stop working after 2 days but I also had a $100 repair bill from the HVAC company. Best: Dave Lennox Signature Collection. O Wire Terminal Designation - This color is typically orange and goes to the O terminal (in Rheem and Ruud, it goes to the B terminal). Additionally, air source heat pumps have backup methods of heating for two reasons. More than 90% of all HVAC (Heating, Ventilation, Air Conditioning) systems are low voltage 24V systems. ... Heat pump with 1 stage of auxiliary heat. Better: Lennox Elite Series. Furthermore, you can cause serious damage to your system for not doing so. The reversing valve switches the condenser from heating to cooling and vice versa, depending on the thermostat setting. Finally, both of these different methods can require a separate way of wiring your heat pump thermostat. Once Upon a Pre-Pandemic Time in Hollywood Here is a breakdown of the models and our recommendations. The most basic method of backup or supplemental heating for heat pumps is electric heat strips. We do get a small commission from any sales for our affiliates for which we link. by High Performance HVAC | Thermostats | 1 comment. If you do not have the jumper, you will separate red wires. Most residential systems that are staged are two-stage systems. Single-stage. Then terminate the extra wire to the Aux/E/W2*. In a heat pump, this is for the backup heat source. There other possible wiring configurations for your heat pump thermostat wiring, but these are the basics. To download the complete ecobee3 lite Installation Guide please click here. Your email address will not be published. The following wiring diagrams are for the ecobee3 lite thermostat and common HVAC equipment configurations. Mercury is very toxic to the environment. thanks tim. Additionally your service technician will appreciate you not planting holly bushes near the outside unit, Lastly have system serviced every six months - once for heating and once for cooling before the season starts. It energizes the compressor contactor in the condenser. There are many variations to wiring a heat pump for control because there are many types of heat pumps. On most heat pump wiring, the white is the 1st stage of electric heat and black is usually emergency or the 2nd stage of electric heat. 5 (R, G, Y, O, W) Yes. We'll assume you're ok with this, but you can opt-out if you wish. It is not designed for use with line- ... Heat pump with auxiliary heat (up to four stages) Yes Geothermal Heat Pump Yes These links will lead to you purchase a product from another company. Finally, the color of the R wire is typically red. Take A Sneak Peak At The Movies Coming Out This Week (8/12) Britney Spears through the years: a look back at her greatest red carpet moments A heat pump thermostat requires more conductors than an air conditioner thermostat. This is because a heat pump pulls heat out of the air so it can be more than 100% efficient. The defrost control board in the condenser will automatically defrost the system. There are extra controls in heat pumps that require extra attention and understanding to get the wiring correct. With a standard footprint and simple interface, the T Series will enhance the entire thermostat experience for you and your customers alike. Many thermostats have RC and RH instead of a single R terminal. The HVAC technician bypassed the ecobee and was able to see the furnace was fine and the problem was with the thermostat. 24v side of relay to stat and also send 24v signal to taco priority zoning pump r/w contacts to activate pump on call for heat from stat. The C wire 24-volt common and it originates from the control transformer also as with the R wire mentioned above. In this article, we will provide specific information for wiring a heat pump for control. X or Aux: Varies: Back-up Heating on Heat Pumps: Used to initiate an auxiliary heat source, which is usually located in the air handler. Emergency Heating on Heat Pumps: Used to trigger the emergency heat source in case the heat pump's condenser isn't working. What does this mean? This commission helps us pay for the overhead of running this website. We would like to show you a description here but the site won’t allow us. ecobee3 manages auxiliary heating through the W1 & W2 (if there is more than 1-stage of aux heat… But opting out of some of these cookies may have an effect on your browsing experience. These cookies will be stored in your browser only with your consent. In some cases, you will have a system that requires staging. You can’t have two transformers powering a single thermostat. Something newly installed thermostats require a setup specifically for a heat pump. Depending on your system, the Power Extender Kit (PEK) included in the box with every ecobee may be able to provide a C wire connection. Lastly, always make sure to follow the instructions for the thermostat manufacturer for wiring and setup. Whether it is electric heat strips or a gas furnace (dual fuel), the W terminal controls this. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. That is the common wire, and it has caused many people indigestion and sleepless nights. say your heating load is 20,000 btu , and your heat pump is rated 12,000, your aux would be sized to cover 8,000 btu (8000 divided by 3.413) I had an apprentice ask me one time why is only one common wire or c wire used in this situation. The proprietary blend of specialty detergents will liquify heavily embedded grease and grime to restore heat transfer and increase the efficiency of the coil. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Page 33 Heat Pump Air Handler NOTE: NOTE: Do not jumper Rc or Rh, ecobee does this Do not jumper Rc or Rh, ecobee does this automatically. Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and cool.While an air conditioner uses the process of refrigeration to only cool, the central air conditioner will usually be paired with a gas furnace, an electric furnace, or some other method of heating. Furthermore, the control transformer for the cooling system will have a red wire terminated at the RC terminal. If your old thermostat uses two separate wires and they were terminated at Aux and E separately, then use a wire and an extra wire to bundle these wires together. Single-stage, two-stage and variable capacity. In some cases, the terminal for the thermostat will be labeled Aux/E/W2. We have other articles here that will help you with thermostat wiring.These other articles help you with thermostat wiring colors and thermostat wiring diagrams.In this article, we will provide specific information for wiring a heat pump for control. Additionally, this information should be provided to you with the thermostat instructions. Emergency must be sized to carry the entire load in event of heat pump failure. Nearly every manufacturer is different and will have different instructions for wiring to get it right. Problem: Fan will not come on in the “ON” position or your fan will not come on when you turn the thermostat down in the air conditioning mode.. Viper Condensate Pan and Drain Treatment is a … How to Wire a Heat Pump for Control - Thermostat Wiring Guide, Resource: The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. The extra capacity will help to insure a long life for the power supply. Monday, February 15(Ontario Family Day)9 a.m. to 9 p.m. EST, Thermostat Installation & Wiring Diagrams, Heat only 2-wire boiler/furnace installations, 2-Wire Boiler System wiring (T & T connections). View Wiring Diagram 28 Contractor Info 28 Reset Installation Settings 29 ... ecobee is designed to operate low-voltage heating and cooling systems. When it goes into defrost mode, the backup heat is energized. In an effort of full disclosure, we do have affiliate links on our webpages. Great question, especially from an apprentice beginning his career in HVAC. In this case, you will need a thermostat that has a W2 terminal and a Y2 terminal. or 2.5kw. This diagram illustrates the wiring connections for a heat-pump system with auxiliary heating. Lastly, they need the C wire to complete the circuit and have power. Heat pumps use the process of refrigeration to move heat in one direction or another depending on the season and the setting of the thermostat. Hopefully, these are explained in a way that will help you understand the wiring. Lennox makes 11 central air conditioners in three series: Basic: Lennox Merit Series. Mercury free thermostat For use with heat pumps only Ships at 8.8-ounces. 3 models, 18.5-26 SEER. Power supply voltage must match the LEDs.