Honeywell thermostat wiring schematic

It works for most brands including popular nest and Honeywell thermostats. First is the basic wiring diagram. Then different wiring setups are discussed such as using Emergency and/or Auxiliary heating and 2 stage heating and air conditioning. Heat Pump Wiring Diagram. The heat pump wiring diagram shows the wiring colors to attach to …

Set adjustment lever (CT30 only) 1 Separate cover from thermostat, and remove the plastic insert. 2 Use a pencil to move the adjust- ment lever to the proper setting for your system (see table below). Finish installation. 1 Align the 3 tabs on the cover with slots on the thermostat, then push gently until the cover snaps into place. 2 Restore ... If so, see inside front cover of this manual for proper disposal instructions. 69-1891ES-1-RTH3100C-IG.CS5.indd 5 5/17/2011 11:21:06 AM. Installation Guide 6. Do not use unconnectedwires. If any wires are not attached to terminals in your old thermostat, do not connect them to your new thermostat. Wrap the bare metal ends of each unused wire ... wiring diagrams. If not available, refer to Fig. 1 through 5. 4. Push excess wire back through the hole and plug any opening with insulation to prevent drafts that can affect performance. 5. Loosely fasten the thermostat subbase to the wall with a screw through the left mounting hole. Adjust the subbase soWrite down the colors of the wires. Check the boxes and write down the color of the wires connected to terminals in the existing wall plate. Check all that apply (not all will apply). Note: If there are wires in terminals that aren't listed, you will need additional wiring support. Contact Support at 1-855-733-5465. Need wiring assistance for thermostat swap/change. Honeywell THWF WiFi Color Touch . It is confusing as most diagrams show both R and C at 24 to 28 VAC when the two are really. Detach the thermostat from the wall, and take a look at the wires that are connecting to it. . Honeywell THWF WiFi Color Touch . Adding Zone Valves To Weil Mcclain He Boiler Heating Help The Wall. Honeywell 24v 3 4 Propress Zone Valve 18 Wire Leads Static Pressure 120 Psi Jackson Systems. Honeywell Zone Control Valve V8043e1012 Connect To Line Voltage Doityourself Com Community Forums. Honeywell V8043f1036 Zone Valve 24 60 3 4 Sweat 5 Cv …Dec 21, 2023 · Honeywell Thermostat Wiring Diagram 4 Wire Examples. The table above provides a more complete list of Honeywell thermostat wiring colors and their uses. But here is a list of the most common wire color mappings, as seen in many four wire t-stat setups. C – 24 VAC Common (You might see blue, purple, or brown typically used for this wire).

SIMPLE TO THE TOUCH. Looking for a traditional, easy-to-use thermostat, install the inexpensive PRO 1000 Vertical Non-Programmable Thermostat. You will appreciate the backlit digital display and the reliable basic operation of the slide switch to select heat, cool or fan. SELECT A MODEL: PRO 1000 Vertical Heat Non-Programmable Thermostat.Feb 9, 2022 · Your wiring will match one of the options below. If you do not see your wiring listed, we recommend using our on-line compatibility checker. 1H/1C Conventional Gas/Oil/Electric Forced Air System (1 transformer): R wire - Power [R+Rc joined by jumper] Y wire - Compressor contactor. C wire - 24VAC common. Residential Thermostats Controls To Program Hvacs Aaa Heating Cooling. Ping 3 Wire Heat Only Thermostat Big Off 73. Honeywell Non Programmable Heat Pump 2 1 Cool Pro 3000 Th3210d1004 Not For Gas. Wiring A Honeywell Room Thermostat Or Resideo Connection Tables Hook Up Procedures. Proth3210d Non Programmable Digital Thermostat Honeywell.Simply match wire labels. If labels do not match letters on the thermostat, check “Alternate Wiring” on page 6 and connect to terminal as shown here (see notes, below). … Refer to the wiring diagram provided with your thermostat or the documentation from Honeywell to determine the correct wiring for your system. Typically, the R terminal is for the 24V power supply, the W terminal is for the heating system, the Y terminal is for the cooling system, and the G terminal is for the fan.

G wire (fan) connected to the fan control to operate a blower in your HVAC system. Y1 wire (cooling) connected to the compressor/refrigerant system. Y2 wire (second stage cooling) connected to the 2nd stage cooling system. C wire (common) wire to complete the circuit and keep power flowing.Aug 7, 2013 ... Comments551 · Thermostat Wiring · Basic Thermostat Wiring - How to Wire HVAC Thermostat · Honeywell HVAC thermostat DIY install hack job butche...Product Overview. The T10 or T10+ Pro Smart Thermostat works with Smart Room Sensors to help you adjust the temperature and humidity from anywhere and stay cozy in …Nov 16, 2022 · The most common wiring for home thermostats is 5-wire, but 6-wire and 7-wire thermostat cables (wires wrapped inside a plastic sheathing) are also possible. In any case, it's ok to have one or more unused wires. For example, you may have a 5-wire cable but only three of the five wires connect to your old thermostat.

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Honeywell has made a business out of helping homes be more comfortable. Today, it is one of the leaders in providing solutions for connected homes, including delivering a variety o...Oct 1, 2016 ... Comments254 · Wiring a Heat Pump Thermostat to the Air Handler and Outdoor Unit! · Honeywell Thermostat Instructions, Wire Terminals, Functions, ...Old Honeywell thermostat wiring diagrams are usually printed on stiff paper and can be difficult to understand. To read them correctly, you must first understand the basics of wiring diagrams. There are two common types of wiring diagrams: schematic diagrams and wiring diagrams. Schematic diagrams show the electrical components …Page 5: Wallplate Installation. PRO TH4110D Programmable Thermostat Wallplate installation Grasp top and bottom of wallplate and pull to remove from thermostat. Drill 3/16” holes for drywall. Drill 7/32” holes for plaster. Wall anchors Remove the wallplate from the ther- mostat as shown at left, then follow directions below for mounting.Thermostat mounting 1. Push excess wire back into the wall opening. 2. Close the UWP door. It should remain closed without bulging. 3. Align the UWP with the thermostat, and …

Installation is Easy. Label wires and remove your old thermostat. Install and wire your new thermostat. Set your new thermostat to match your heating/ cooling system. – It is preset for the most common system. We are here to help. Call 1-800-468-1502 for wiring assistance before returning the thermostat to the store.d. Inspect the old thermostat wiring. If wiring meets any of the following conditions, see special wiring instruc-tions section after Step 7. Fig. 3. • The old thermostat is a clock thermostat with wires attached to the C or C1 terminals. • The old thermostat has six or more wires, excluding wires attached to C or C1 terminals.Download this manual. TRADELINE. The T87F Universal Thermostat provides tempera-. ture control for 24 to 30 Vac residential heating, cooling. or heating-cooling systems. For heating systems, the. T87F mounts on the wallplate provided. For cooling. only, or heating-cooling, order the 137421A (198170A.G wire (fan) connected to the fan control to operate a blower in your HVAC system. Y1 wire (cooling) connected to the compressor/refrigerant system. Y2 wire (second stage cooling) connected to the 2nd stage cooling system. C wire (common) wire to complete the circuit and keep power flowing.Swing the thermostat down. 3. Press the lower edge of the case to latch. NOTE: To remove the thermostat from the wall, first pull out at the bottom of the thermostat; then remove the top. Wiring Follow equipment manufacturer wiring instructions when available. Refer to the Wiring Diagram section starting on page 8 for typical hookups.Simply match wire labels. If labels do not match letters on the thermostat, check “Alternate Wiring (Conventional Systems)” on page 6 and connect to terminal as shown (see notes, below). M32715 SCREW INSERT WIRES AND TIGHTEN SCREWS WIRE HOLE LABELED WIRES W/ Aux Y W G R Not Used Remove metal jumper if you have both R and Rc wires. We are ...3. HpB Single Stage Heat: 24VAC 4. HpO Single stage Heat: 100-277VACLooking for a Honeywell thermostat manual? Visit here to find the thermostat model you are looking for and get the help you need. Connect the Line Voltage: Connect the line voltage supply to the R terminal of the Honeywell R8285A. This provides the necessary power for the device. Wire the Transformer: Connect the transformer wires to the appropriate terminals. Typically, the 120V side connects to the R terminal, and the 24V side connects to the C terminal. Non-programmable Thermostat RTH111 5 Typical Wiring 1) Match each labeled wire with the terminal having the same letter. 2) Loosen the terminal screws using a screwdriver, …When 4 wire thermostat wiring plus a C-wire is required, then you need 5 wire thermostat wiring. It’s pretty simple. The key is to use a wire not used for another purpose as the common wire, or C-wire. How to wire a 5 wire thermostat: 1). Attach the Red wire to the R terminal for 24V Power. 2).

The Honeywell Home Thermostat RTH221B1039 is an efficient, reliable and cost-effective home thermostat. It has been designed to provide a comfortable temperature throughout your home with minimal energy consumption. However, in order for the thermostat to function properly it needs to be wired up correctly to enable the heating and cooling system.

If you own a Honeywell Pro Series thermostat, it’s essential to familiarize yourself with the user manual. The Honeywell Pro Series manual is a comprehensive guide that provides de...Apr 25, 2020 ... Ask This Old House home technology expert Ross Trethewey demonstrates how to install a new smart thermostat without an existing common wire.May 25, 2019 ... Basic Thermostat Wiring - How to Wire HVAC Thermostat ... Color Code, How it Works, Diagram! AC ... Honeywell Thermostat Installation and Wiring.t6 pro wiring diagrams wiring diagrams heat only: gas or oil furnace cool only c g w r s s y y2 g c u u a w2 w k rc r l/a e aux m36882 1 common optional. ... 1 common optional to thermostat. c honeywell v8043 zone valves 1 th tr transformer r 24 volts end switch m36890 2h/2c gas furnace + air-conditioning. compatible t6 models: th6320u2008Honeywell’s FocusPRO® offers the perfect blend of features, performance. energy savings and value. With an easy-to-read digital display, FocusPRO prominently displays both room and set temperature. FocusPRO™ THD Programmable Thermostat 5 Installation Guide 4 Wiring 1 Loosen screw terminals,insert wires into terminal block,then re-tighten ...Connect the Line Voltage: Connect the line voltage supply to the R terminal of the Honeywell R8285A. This provides the necessary power for the device. Wire the Transformer: Connect the transformer wires to the appropriate terminals. Typically, the 120V side connects to the R terminal, and the 24V side connects to the C terminal.Step 1: Turn off the HVAC system power at the circuit breaker or fuse box. Step 2: Remove the old thermostat cover and safely disconnect the wires. Step 3: …Jan 23, 2023 · To achieve this simple. Put together the the Y, G and R H wire. If the compressor kicks on outside, then the problem is probably not with the system but the thermostat. IAnd if the system doesn’t turn on heat, the problem is not with the thermostat. Read also: 6 wire thermostat wiring diagram. The Honeywell 8000 thermostat is a popular choice for homeowners looking to upgrade their heating and cooling systems. With its sleek design and advanced features, this thermostat ...

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Honeywell Thermostat Wiring Diagram 4 Wire. By Wiring Draw | November 1, 2022. 0 Comment. Thermostat wiring issues home wyze forum how wire a flair room connection tables all kinds of with the help vintage 4 honeywell doityourself com community forums i have pc8900 installed at for unit is labeled as 1 2 3 and following hvac problem solver ...Thermostat mounting 1. Push excess wire back into the wall opening. 2. Close the UWP door. It should remain closed without bulging. 3. Align the UWP with the thermostat, and …Jul 17, 2022 · Honeywell home thp9045a1098 8000 series redlink and wi fi thermostats c wire adapter installation manual manualzz th8321wf1001 guide manuals books the heat pump thermostat wiring diagram 1 cool non programmable digital week with display rth221b rth6360d1002 doityourself com community forums rth5160d1003 simple rth9585wf1004 smart color 7 day heating cooling thermostatillivolt ct31a1003 e t2 at ... Non-programmable Thermostat RTH111 5 Typical Wiring 1) Match each labeled wire with the terminal having the same letter. 2) Loosen the terminal screws using a screwdriver, …Page 1: Programmable Thermostats Fig. 3 through 6 for typical wiring diagrams. In 5-wire installations only, be sure to remove the fac- tory-installed jumper connecting terminals R and Rc. G. S. • 1-95 • ©Honeywell Inc. 1995 • Form Number 69-0889 69-0889...Honeywell Ct31a Wiring Diagram – CT31 Wiring Installation For A Ct31a which wires from the wall connect to the ct31a panel? (Posted by.Again referring to the Honeywell thermostat ct31a wiring diagram, you can see it requires only two wires, R and W.CT30/CT33 Low-voltage Thermostat 5. Set adjustment lever (CT30 only) 1 Separate cover from thermostat, and remove the plastic insert. 2 Use a pencil to move the adjust- ment lever to the proper setting for your system (see table below). Finish installation. 1 Align the 3 tabs on the cover with slots on the thermostat, then push gently until the ...For coupons and instant savings on Honeywell Products, visit http://www.honeywellstore.com/store/honeywell-coupon-code-discount.asp today! For more informati...Run the thermostat wire through the wall to the thermostat, and connect it to the C terminal there. You now have a common wire. Tip: Choose a blue or black wire to fit the standard 5 wire thermostat wiring color code. 2). Use 4 wires only. Connect the red, white, yellow and green wires to the R, W, Y and G terminals.Our Customer Care Team can help determine if your home is compatible with your WiFi thermostat. Contact Us. Find out if your home is compatible with a Honeywell Home thermostat. Use our helpful tool to take an assessment of the existing wiring in your home.Feb 9, 2022 · Your wiring will match one of the options below. If you do not see your wiring listed, we recommend using our on-line compatibility checker. 1H/1C Conventional Gas/Oil/Electric Forced Air System (1 transformer): R wire - Power [R+Rc joined by jumper] Y wire - Compressor contactor. C wire - 24VAC common. ….

Honeywell’s FocusPRO® offers the perfect blend of features, performance. energy savings and value. With an easy-to-read digital display, FocusPRO prominently displays both room and set temperature. FocusPRO™ THD Programmable Thermostat 5 Installation Guide 4 Wiring 1 Loosen screw terminals,insert wires into terminal block,then re-tighten ...View and Download Honeywell Home TH4110U2005/U installation instructions manual online. TH4110U2005/U thermostat pdf manual download. Also for: Th4110u-2005, T4 …The Honeywell RTH2300B1038 wiring diagram is designed to help you easily connect your thermostat to your HVAC system. This diagram will show you which wires need to be connected to which terminals on the thermostat. The Honeywell wiring diagram will also provide instructions on how to safely connect the wires to prevent shock hazards or other ...1. Check Power Supply. The first step in troubleshooting Honeywell ST9400C wiring issues is to check the power supply. Ensure that the unit is receiving power by verifying that the circuit breaker or fuse is not tripped. Also, check the wiring connections to make sure they are secure and properly connected.Hygrometers are used by many professionals to monitor levels of humidity in the air. So, do need one in your home? Advertisement Air has water vapor — or humidity — we are sensitiv...This thermostat is designed to control an electric heating system such as a baseboard heater, a convector or a fan-forced heater. The thermostat CANNOT be used with: a resistive load under 1.25 A. a resistive load over 12.5 A (120/208/240V) a system driven by a contactor or a relay (inductive load) a central heating system.Page 1: Programmable Thermostats Fig. 3 through 6 for typical wiring diagrams. In 5-wire installations only, be sure to remove the fac- tory-installed jumper connecting terminals R and Rc. G. S. • 1-95 • ©Honeywell Inc. 1995 • Form Number 69-0889 69-0889...Nov 20, 2023 ... Thermostat Wiring Series: Wiring ... Honeywell HVAC thermostat DIY install hack job butcher re-wire ... Electrical Wiring Diagrams: Essential Tips ...the wiring diagram could result in a hazard to persons and. property. 3. All wiring must be done with a wiring material having a ... 6-436.9 5H76292A August, 2009 Honeywell TH5220D1003 thermostat wiring for gas unit heaters HD/HDB, HDS/HDC, PTS/BTS, PTC, PDP/BDP, and duct furnaces “D”, “H”, “I”, & “O” series WARNING 1 ...Honeywell Rth7600d 7 Day Programmable Thermostat. Cadet Double Pole 22 Amp Line Voltage 120 240 Volt Mechanical Electric Baseboard Heater Mounted Thermostat In White Btf2w. Chromalox Thermostat Wiring Diagrams For Hvac Systems Installation Instructions. How To Replace A 3 Wire Thermostat With 4 On Baseboard … Honeywell thermostat wiring schematic, Honeywell t9 smart thermostat manual english 69 pages wiring a room or resideo connection tables hook up procedures home rcht9510wfw2001 wifi installation guide manuals with sensor now without …, WIRING ASSISTANCE TROUBLESHOOTING M32727 GW / AUX BY O O G Y R R Rc Au x Wiring—Heat Pump Connect wires: Heat Pump 1. Match each labeled wire with same …, C-Wire Adapter. Compatible with most heating, cooling, and heat pump systems. Does not work with electric baseboard heat (120-240V) Does not work with millivolt systems. Does not support S terminals for indoor and outdoor sensors. Android or iOS smartphone, tablet, or device. CAUTION: ELECTRICAL HAZARD., Are you tired of spending hours searching for accurate and reliable auto wiring schematics? Look no further. In this article, we have compiled the ultimate collection of resources ..., A Honeywell T4 Wiring Diagram provides a detailed layout of all the components of the thermostat, including the power source, the sensors, and the display. It can help ensure that the installation is done properly and prevent any potential problems. It’s an invaluable resource for any homeowner, technician, or engineer, and it can save time ..., Fig. 1. Thermostat wiring diagram. Check Out Thermostat! Turn on the power to the heating system.! Turn setting knob all the way clockwise ; listen for clicking sound as switch makes contact. Electric heater should begin operation.! Turn knob all the way counterclockwise ; listen for clicking sound as switch breaks contact. Electric heater ..., Honeywell Thermostat Wiring Diagram 4 Wire. By Wiring Draw | November 1, 2022. 0 Comment. Thermostat wiring issues home wyze forum how wire a flair room connection tables all kinds of with the help vintage 4 honeywell doityourself com community forums i have pc8900 installed at for unit is labeled as 1 2 3 and following hvac problem solver ..., To wire the thermostat for AC power, connect the common side of the cool-ing transformer to the “C”terminal as shown at left. Important: Remove R/Rc jumper for 2-transformer systems only.(See wiring diagram on page 5.) Connect common side of transformer to “C” terminal Install batteries in back of thermostat (optional if AC powered ..., Unscrew the two wires from the terminals. Remove the motherboard of the old 2 wire thermostat and put the new 2 wire thermostat in its place. Reconnect the red and white wire, tighten down the set screw, and put the control panel back on. Test the 2 wire thermostat wiring by turning the furnace on., Thermostat wiring connections colors terminals faqs 33 00151 01 t5 wi fi t4 pro programmable 1 heat cool honeywell home 5 steps to get heatcold installation t10 smart now compatibility old furnace heating help the wall how wire 2 3 4 guide thp9045a1098 8000 series redlink and thermostats c adapter manual manualzz replacing trane with …, Installing your thermostat 9e Select your system type and touch Next. The system type determines other selections for completing initial setup. Use the checklist from Step 6A-d when making selections. 9f Touch Next after making selections on each screen. Next 9g Touch Done on the last screen., Step 2: Remove the old thermostat. Carefully remove the cover of your old Honeywell thermostat by gently pulling it away from the base. Take note of the wires connected to the terminals. It might be helpful to take a picture or make a …, Install 2 AAA batteries on the back of the thermostat. Align the two brackets on the top of the thermostat with the corresponding slots on the top of the wallplate. Push the thermostat against the wallplate. Tighten the screw at the bottom of the thermostat. Turn power back on at the heating/cooling system. M28098. , Embrace simplicity with The Round Non-Programmable Thermostat. The reliable, readable scale makes setting the exact temperature easy — including a model with large, raised markings and clicks at every 2-degree change so you can see and hear the change. Plus, the popular, familiar design fits effortlessly into your home decor., Smart Response Learning. The T6 Pro 7-Day Programmable Thermostat learns your heating and cooling cycle times to deliver the right temperature when you want it. With precise temperature control, the thermostat can automatically change from heating to cooling to help maintain the temperature you like most. Intuitive Design., Honeywell t9 smart thermostat manual english 69 pages wiring a room or resideo connection tables hook up procedures home rcht9510wfw2001 wifi installation guide manuals with sensor now without …, See Fig. for wiring diagrams for.FocusPRO™ THD Non-programmable Digital Thermostat 3 Remove the wallplate from the ther-mostat as shown at left,then follow directions below for mounting. 1 Pull wires through wire hole. 2 Position wallplate on wall,level and. Honeywell THD – Basic Pro Non-Programmable, 1H/1C, Vertical Thermostat – Features ..., Lyric T5 Wi-Fi Thermostat Screws UWP Mounting System Anchors. Wall. 10 Bundle and insert wires through the UWP. Pull open the UWP and insert the bundle of wires through the back of the UWP. Make sure at least 1/4-inch of each wire is exposed for easy insertion into the wire terminals. 11 Insert the wall anchors., In the case of the Honeywell TH3210D1004 thermostat, the wiring diagram will typically include terminals such as R, C, W, Y, G, and O/B. These terminals correspond to the different wires that connect your thermostat to the heating and cooling system. For example, the R terminal is usually connected to the transformer and provides a power …, Simply match wire labels. If labels do not match letters on the thermostat, check “Alternate Wiring” on page 6 and connect to terminal as shown here (see notes, below). Thermostat does not work on Heat Pumps with auxiliary/backup heat. We are here to help. Call 1-800-468-1502 for wiring assistance. W/ Aux Not Used M32714 Remove metal jumper ..., 1. Check Power Supply. The first step in troubleshooting Honeywell ST9400C wiring issues is to check the power supply. Ensure that the unit is receiving power by verifying that the circuit breaker or fuse is not tripped. Also, check the wiring connections to make sure they are secure and properly connected., That is a basic Honeywell thermostat wiring diagram for a single-stage heat pump. If you have a two-stage heat pump, then you will also utilize terminal Y2 for the second stage. Furthermore, this thermostat wiring diagram is specifically for a system with two transformers. Your system likely only has one transformer, as most typical residential ..., Amazon held an event this morning, and wow-oh-wow did they announce a lot. Smart thermostats! Flying security cameras! Robot companions! Didn’t tune in or have time to catch it all..., 1 Installing the Bdr91 Relay Box. 2 Rf Communication Test. 3 Installing the Room Thermostat. 4 Basic System Operation. 5 Loss of Rf Communications. 6 Binding/Rebinding Procedure. Download this manual. See also: User Manual , Instruction and Installation Manual. DT92E., Embrace simplicity with The Round Non-Programmable Thermostat. The reliable, readable scale makes setting the exact temperature easy — including a model with large, raised markings and clicks at every 2-degree change so you can see and hear the change. Plus, the popular, familiar design fits effortlessly into your home decor., Unscrew the two wires from the terminals. Remove the motherboard of the old 2 wire thermostat and put the new 2 wire thermostat in its place. Reconnect the red and white wire, tighten down the set screw, and put the control panel back on. Test the 2 wire thermostat wiring by turning the furnace on., 1. Separate wallplate from thermostat. 2. Mount wallplate as shown below. Grasp top and bottom of wallplate and pull to remove from thermostat. Drill 3/16” holes for drywall. Drill 7/32” holes for plaster. Wall anchors Wire hole Mounting screws. VisionPROTM TH8000 Series 3 69-2389—03., If you have an older home with an outdated thermostat, you may be missing out on the many benefits that come with upgrading to a newer Honeywell thermostat. One of the key benefits..., The Honeywell rth6580wf thermostat is a popular choice for home heating and cooling control. Installing and wiring this thermostat can be done by following a few simple steps. This guide will walk you through the process of wiring the Honeywell rth6580wf thermostat in your home. Step 1: Turn off power. Before you start wiring the thermostat, it ..., Wallplate installation. Separate wallplate from thermostat. Mount wallplate as shown below. Grasp top and bottom of wallplate and pull to remove from thermostat. Drill 3/16” holes for drywall. Drill 7/32” holes for plaster. Wall anchors. Wire hole. Mounting screws., 1. Separate wallplate from thermostat. 2. Mount wallplate as shown below. Grasp top and bottom of wallplate and pull to remove from thermostat. Drill 3/16” holes for drywall. Drill 7/32” holes for plaster. Wall anchors Wire hole Mounting screws. VisionPROTM TH8000 Series 3 69-2389—03., If so, see inside front cover of this manual for proper disposal instructions. 69-1891ES-1-RTH3100C-IG.CS5.indd 5 5/17/2011 11:21:06 AM. Installation Guide 6. Do not use unconnectedwires. If any wires are not attached to terminals in your old thermostat, do not connect them to your new thermostat. Wrap the bare metal ends of each unused wire ..., Honeywell Ct31a Wiring Diagram – CT31 Wiring Installation For A Ct31a which wires from the wall connect to the ct31a panel? (Posted by.Again referring to the Honeywell thermostat ct31a wiring diagram, you can see it requires only two wires, R and W.