Oil furnace thermostat hookup
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But what if you have a system that's a little different like a Heat Pump System, Then your thermostat is going to be wired a little different as well. First and foremost when you go to wire a thermostat, if you have any doubt of the type of HVAC system you have and are uncomfortable with wiring, then I highly recommend using a qualified HVAC service technician to complete your task.
This could save you a lot of unnecessary expenses in the long run. Now the thermostat circuits I will be covering will consist of the two scenarios I mentioned above. But an important issue here is that the diagrams and wiring color codes are going to be the most common standardize method. Always keep in mind that who ever wired your thermostat may not have followed these procedures and your color codes will not match the following examples.
You will have to determine this before you start disconnecting any of your thermostat wiring. I would highly recommend that you write down what color wire is going to which terminal. This way if your color codes don't match the normal code as the chart below indicates, you can still get a good idea of which wire should go where on your new thermostat.
(The ease of doing it this way will vary by furnace and installation.) Yes, you should install a C-wire if you are upgrading your thermostat. . My old oil furnace and thermostat only have two wires between them, R and W. Since there is no. Changing the thermostat that controls the operation of your oil furnace is an easy wiring configuration, reconnect the wires to the new thermostat appropriately.
If you're changing your old style thermostat to a programmable type, then most HVAC systems are compatible and will work just fine with a programmable unit. But in the case of a Heat Pump system, You'll really have to do some research to verify that the programmable thermostat will work. Installing a new thermostat may be a little daunting for a lot of people, but it is a relatively easy do-it-yourself project that can be completed in a short amount of time.
Start by tripping the breaker that supplies power to the thermostat. While there is not a lot of electricity running to it, it is better to be safe.
Remove the faceplate to the existing thermostat. You shouldn't unscrew the existing thermostat just yet. You will need to first disconnect the wires. Depending on the style of the existing thermostat, you may have to remove it to get at the wires. Disconnect each wire running to the thermostat, one at a time. Refer to our pages about heat pump wiring on how to wire a heat pump thermostat or our thermostat wiring color page to see the additional control points for your thermostat.
How to Wire a Thermostat | HVAC Control
Thermostat Wiring Color Code Table opens in a new window Additionally, be aware that thermostats are equipped with heating and cooling anticipators. Cooling anticipators are not adjustable where heat anticipators are adjustable in mechanical thermostats. Setting the heat anticipator is important for your heating system. And for the thermostat to function properly only if you have a mechanical non-digital thermostat. It is set according to the amp draw on the control heating circuit.
Make sure the heat anticipator is set properly. It is set in the thermostat or thermostats. The first thing you should do before changing the thermostat is to select the proper thermostat for your system. Selecting the proper thermostat. If you are retired or if someone is at home during the day you likely do not need a programmable thermostat. If this is the case the only benefit you will get from a programmable thermostat or thermostats is at night.
Or I prefer to say in the morning because you can set it so the unit comes on just before you wake. That way the house is at a comfortable temperature when you get out of bed. I will describe the advantages of the programmable thermostat in full detail in a different section below. Once you have made the thermostat selection you can proceed to the next step. Helpful Page to help you select the right thermostat opens in a new window. Honeywell Thermostats Available Here.
Thermostat Wiring and Installation Advisory………. If you decide to install your own thermostat you do so at your own risk.
Wire A Thermostat
There are many incidences where the homeowner installed their own thermostat and was successful. There are also many incidences where the homeowner was unsuccessful installing a new thermostat. The people that were unsuccessful wasted part of their day, ruined a thermostat or two and caused the malfunction of an integral part of their system. That is not mentioning the fact that they ended up calling a professional HVAC Technician to fix the problems.
Problems caused by improperly installing a thermostat. The unsuccessful end up paying three to four times what they would have paid if a professional was called first.
Factor this into your decision and if there is any doubt call a professional. Call a professional to install and wire the new thermostat. Before you begin to install your new thermostat turn the power off. These are the four wires that you need to control the heat, cooling and the blower or fan. This is for most air conditioning and heating systems. If the colors of the wires do not match the colors described here make sure you mark the wires with masking tape.
Sometimes you will have extra wires that are not connected. Thermostat wire comes in many different varieties.
The contractor who installed the system probably used 5 wire or 8 wire thermostat wire bundle. They used what they needed and simply twisted or cut the other wires off. Thermostat wire terminations should be neat with no excess copper exposed.
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Additional answers to your questions concerning thermostats can be found here in our thermostat category index. Other questions about a Honeywell thermostat, Honeywell thermostats, programmable Honeywell thermostats can be found at the Honeywell Thermostat website. Additionally, see thermostat wiring color code chart to help with How to Wire a Thermostat. This thermostat wiring diagram is a split system. The wires going to the condensing unit are shown in red and white. However, these colors can be different.
One wire originates from the thermostat Y terminal and terminates at the condenser.
The other wire originates from the common side of the transformer. The transformer is commonly installed in the air handler. In rare installations, the condensing unit will have the transformer. The manufacturer did not install the transformer in the condenser. The transformer was blown in the past.
Additionally, the colors here are typical. However, they can be different depending on who wired the unit and their color coding system. Most HVAC technicians will use this color code. However, there is an occasional oddball who knows better than everyone else. Or perhaps the wiring color combination was not available for the new installation. Always keep in mind to properly dispose of hazardous materials responsibly. Older mechanical thermostats contain mercury and mercury are extremely hazardous to human health and our environment.
Most municipalities have a hazardous waste collection site. They will be happy to accept your old thermostat and dispose of it properly. Additionally, there are state and federal laws that are explicit about properly disposing of hazardous waste including products containing mercury.
How to Change an Oil Furnace Thermostat
Please do not throw the old thermostat in the regular waste bin. Be responsible and properly dispose of the old thermostat. See the About the Author page for information about the author of this article. Photo Uploads If you are human, leave this field blank. If you want to include a description then do so here. Upload your photos or documents here! Drop a file here or click to upload Choose File Maximum upload size: Hello I would like to know how to wire two heating Units on a same thermostat. Becasuse i have these two heating units running on a same open space. Thank you in advance.