Most thermostats have a Red wire that is the power wire that usually connects to R & RC terminals of the thermostat, a Green wire that energizes the Fan relay, connected to the âGâ terminal on the thermostat, a Yellow wire that energizes the outdoor unitâs contactor, (if you have air conditioning) and a white wire that energizes the gas valve, electric heat relay or oil burner ⦠I have a Trane XL1400 heat pump. Blue & Brown.. The current thermostat is using 9 wires (red,tan,orange,green,ye ⦠read more C is known as the common terminal. When this is the case, you should immediately remove all wires since it ⦠The color of wire R is usually RED and C is BLACK. For the Y, Y1, and Y2 wires, Y or Y1 will go to the Y terminal, and Y2 will go to the Y2 terminal. Connect the white wire to the "W" terminal on the furnace and thermostat. I am trying to replace the original thermostat with a new digital honeywell focus PRO5000 TH522OD1029. Lookes like the brown and white wires are going to the same connection. How Thermostats Work . 18.0 (8) 20.0 (1) 15.0 (1) Wire Features. If youâre installing an ecobee thermostat in a multi-speed system with multiple G wires running to your old thermostat, use the table below to match your preferred fan speed with the correct wire: The red wire ⦠tx9100E is the new thermostat. Lindsay is close but on some of the old RUUD thermostats the X terminal is common. Building Materials. Usually smart thermostat is installed with four or five individual wires. Thermostat wire comes in various weights. Electrical Wire & Cable. Smart Thermostat Wiring. Each of these wires has a name featuring a single letter (listed below). If the B wire is blue, it should most likely be connected to the C connector. Thermostat wire is a bundle of 18 or 20 gauge copper conductors. It should help you. Is this older base not compatible with new system? If all the wires are in the correct place, the next step is to see if you mistakenly installed a four wire thermostat to a five wire base. ... Southwire FAS/LVT Copper Thermostat Electrical Cable - 18/2 Brown 150m-Compare. The â18â refers to the gauge and the â5â refers to how many individual wires are inside the cable. If you have heat and AC, youâll need 18/5. The thermostat wiring on these systems can have very similar wiring properties. The new thermostat does not have terminals labeled X2 and W ⦠White/W is the Heating element. Failure to properly link these can lead to failures in the system, including short circuits, which can lead to fires. In some cases, one of those wires may be your common. Should I put the Brown into the W1, and not connect the white? The first thing you should do is check for any loose wires. This option is perhaps the simplest. When wiring a replacement thermostat the colors of the wires and the connections will need to be transferred from the existing thermostat to the new thermostat. In this configuration, the blue wire acts as the return wire between the 24V transformer in the heating/cooling system control panel and the thermostat. These color codes are vitally important in connecting the right wires to the corresponding terminals. Mike83 Screwfix Select. The Trane thermostat has no other designation. The old wires are G,B(blue),R,Y,W,X2 and O plus a brown wire that was not used. 18 gauge wires are slightly thicker than 20 gauge wires. Thermostat Wire (10 products) Category. What is the proper wiring for this. A thermostat is wired to a furnace or air conditioner unit and acts as a switch to turn the unit on and off automatically, based on the thermostat's temperature setting and/or programmed time schedule. S, S1, S2: These wires run directly outside and provide outdoor temperature information to the thermostat. Electrical. W - white wire - this wire goes to the gas controls to engage the heat on a call for heat from the thermostat when you have it set to heating mode. Because not all thermostats are alike, it is important to make sure the replacement thermostat is identical or fully compatible with your heating and cooling system, and serves as a replacement for the original thermostat. The wiring is as follows: Trane Green=G Orange=O Black=x2 Yellow=y Brown=T Red=R. Strip the red and white wires back about 1/4 inch at both the thermostat and the furnace ends. Yellow/Y is the AC compressor. The brown wire (X on the old stat) is common (C on the new stat). K: Honeywell wire saver modules combine the Y and G wires to form a single K wire that connects to the K terminal on some Honeywell thermostats. 250 ft. 18/5 Brown Solid Thermostat Wire Cerroâs thermostat wire is a Class 2, power-limited Cerroâs thermostat wire is a Class 2, power-limited cable for use in thermostat controls and alarm systems. Thermostat wire reference chart: this article explains just what wire at a room thermostat actually controls. If you're thermostat doesn't have separate connector labeled C and you're not sure what type of system you have: A brown wire is mostly likely a heat pump wire and should be connected to the O/B connector on the Nest thermostat. Thermostat Wire; Wire Gauge. Featuring solid, bare-copper conductors and 6 miles of PVC insulation, this wire is sunlight resistant and built to perform. Then the pigtail end of the adapter will connect where those wires were in the wire nuts. If you only have a single red wire the jumper between Rh and Rc are required for some heating and cooling hybrid systems depending on your thermostat. Rh stands for Red-Heat and Rc stands for Red-Cool. This wire will go to the G terminal on your new thermostat. Wiring Guides Boiler Wiring 18 Programmer Wiring 19 Valve Wiring 20 Frost Thermostats 21 Fault finding Wired Sundial Y Plan 22 - 23 Wired Sundial S & S Plan Plus 24 â 25 Wired Sundial C Plan 26 â 27 Wired Sundial W Plan 28 â 29 Boiler Plus 29 Wireless Room Thermostat Fault Finding 30 Wiring Centre 31 Re-binding of wireless products 32 â 34 A heat pump system, on the other hand, has eight or more different thermostat wires. The âblackâ color wire is part of the set that goes to the thermostat. The brown wire on the thermostat is the temperature gauge,this helps the thermostat to keep correct temperature so it doesn't get to cold or to hot. Heat pump thermostat wiring - A typical wire color and terminal diagram. In standard thermostat wiring, the blue wire connects to the common terminal on the thermostat, making it the C-wire. I just opened up the air handler. Installing a thermostat is more difficult if you are not familiar with the color codes of thermostat wire. The blue wire connected to O/B on the new stat controls the reversing valve. The Nest manages quite well without one in typical homes, another example is the Honeywell Lyric Round 2.0. The earth (yellow) will be terminated in a suitable connection on the back box, and the neutral (blue) should be slipped in to a single screw terminal to keep it safely isolated (or simply snip off the bare wire end, turn the wire end over on itself and wrap in ⦠Between the thermostat and the heating or cooling equipment is a set of low-voltage wires that are run from the thermostat control terminals to the terminal ⦠C wire from furnace to thermostat â Source. Most two-wire thermostats wire have a red and white wire encased in a brown insulated coating. If you have a C wire, place it into the C terminal on your wall plate. That closes the 24-volt control side of the gas furnace, and begins the process of starting the gas furnace into its sequence of operation. These two connections will ensure that there is power to the thermostat that you are ⦠(These blacks wires should really have a collar of BROWN tape wrapped around them to indicate they become 'live'. Get A Thermostat That Works Without C Wire. Buy a smart thermostat that doesnât require a common wire. The adapter will basically be between the thermostat wires and the wire nuts. As shown in the diagram, you will need to power up the thermostat and the 24V AC power is connected to the R and C terminals. The âwhiteâ color wire is part of the set that goes to the condenser unit. add a comment Security code is wrong! This wire also known as a common wire. Not sure why they would do that, both drive the same back-up heating. THERMOSTAT WIRING TIPS & COLOR CODES - thermostat wire installation tips and wier color decoder Tips on thermostat wiring & color code conventions Old Timer Tips on Shorting Out Thermostat Wires on Purpose to Identify Which Wire is Which Shorting Out Thermostat Wires - Leads to Loss of Heat This article describes several tricks of the trade used by professionals ⦠I hope that was very clear! Thermostat Wiring Color Code. These four wire colors are standard on most Honeywell thermostats but older or different styles -- or ones that have been previously been installed or repaired -- may have wires of different colors. Brown obviously to L, grey to N and black where? Thermostat wire is just a big spool of bundled, color-coded wires. ; Y - blue wire â This wire goes to your air conditioner and starts the air conditioner into its ⦠Each of the wires listed went to their designated terminals. Thermostat C-Wire is that extra cable providing extra power to the smart thermostat. Need to know wiring diagram for a weathertron thermostat model # baystat to install a honeywell thermostat THD this link has a good diagram of the wiring. Brown wire - Live Black - switch alive Grey - Neutral Secondly, if that is correct Iâm not sure on the new thermostat where to wire these colours? Then if you get 24v to that brown wire, you will add the C wire on the pigtail to the wire nut with the brown wire. Itâs used for systems that donât provide a C wire but have a thermostat that requires one. Mentioned below are the most frequently used terminals as well as where theyâre located. Green/G runs the fan. ecobee thermostats support the former type but not the latter. Wire it as Lindsay has except reverse the brown and blue wires. 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. The exact number of colored wires varies, as does the gauge of the wires. This data can also be helpful if thermostat wires have become mixed-up or improperly color-coded by allowing you to trace wires back to their control connection point. Southwire FAS/LVT Copper Thermostat Electrical Cable - 18/5 Brown 75m- Let's take a look at the G wire. If multiple G wires connect to your thermostat, your thermostat manages fan speed. Each individual conductor is sheathed in a protective, flexible coating of a different color. Typically, a furnace plus A/C HVAC system has four or five thermostat wires and a common wire. Any advice would be great Dan89, Feb 16, 2020 #1. In wiring a new Lux 1 stage cool, 2 stage heat thermostat, I am left with two active wires that go some where out to the heat pump. This appears to be a 7-wire system with one transformer. 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