This diagram illustrates the wiring connections for a heat-pump system with auxiliary heating. Honestly, I’ve wanted a Nest thermostat for a long time. The other issue with not having the option for emergency heat is that you lose control. Write to me in PM, we will communicate. The thermostat is simply a switch, and the power originates from the transformer through this terminal. AUX/AUX1 and AUX2. It also means. Required fields are marked *. heat pump (air or geothermal) with auxiliary heat. (Note: when doing my humidifier work, I never touched the Ecobee wiring). I am wiring a Armstrong Air Heat Pump 4SHP16LT with 10kw emergency heat to a honeywell focus pro 6000 tstat in a 3 heat … Ecobee 3 Lite: heat pump and aux heat issue. W2, AUX and or E (Emergency) wiring connections will normally connect to the ecobee3 W1 terminal. Close. HVAC AL #08093 REF AL #52466 HEAT PUMP (AIR OR GEOTHERMAL) WITH AUXILIARY HEAT. Aux Heat We got a new Reem Unit in September, we have been very happy with it and the huge improvement in our electric bill for the past 2 months. I eventually had to wire it up so the oil heat is the AUX heat and the heat pump is turned off when the temps fall below 40F. Your auxiliary heat source is running too often (can be configured from 30 minutes to 8 hours). Warning: This is a project for a confident DIYer. Some heat pumps are better at lower temps than others. There are work-arounds (cap the aux heat wire instead) but are not as clean. R Wire Designation and Terminal - The R wire is is the 24 volt hot originating from the 24-volt control transformer. level 1 If you have a heat pump system, place it into the O/B terminal. Here’s how to install and set up the Ecobee smart thermostat in your own home. I double checked wiring and it is all as I left it. In your case that means never using the furnace. That is the power to energize the control relays and contactors in your system. W2, AUX and or E (Emergency) wiring connections will normally connect to the ecobee3 W1 terminal. Some auxiliary heat systems for heat pumps have two stages, hence AUX2. If you don’t know your system type, place this wire into the W terminal. I can defend the position. Today I was specially registered at a forum to participate in discussion of this question. Hacking the Ecobee3 for Wiring Success. These diagrams are also available within the ecobee3 Installation Guide included with your ecobee3 thermostat. I recently purchase an Ecobee3 thermostat. Now I keep on getting alerts that the Aux heat is running. Your email address will not be published. You won't need the PEK included in the box. 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). The Ecobee3 connects the Rc and Rh terminals automatically which means you can choose either Rc or Rh to plug the wire into. So you'll have to find out at what outside temp your system will have to use the aux, but if the system isn't 100% you'll first notice it with more and more aux usage until eventually, aux becomes primary. Hi there, Thank you for reaching out. W2, AUX and or E (Emergency) wiring connections will normally connect to the ecobee3 W1 terminal. ecobee3 manages auxiliary heating through the W1 & W2 (if there is more than 1-stage of aux heat) terminals outputs. This guide uses an Ecobee3, but the installation and setup process should be identical throughout. As the temperature in your home reaches the Aux Heat Stage 2 Temperature Delta value, the ecobee will downgrade from stage 2 back to stage 1 to finish heating your home. Advanced Energy considers a single-stage heat pump to have one outdoor compressor stage (speed). This is more common on older, original equipment. 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