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Honeywell WiFi Thermostat Installation Manual


This WiFi Thermostat installation manual is a comprehensive guide to installing the Honeywell wifi thermostat. This manual will help you install your new thermostats quickly and easily without any confusion or frustration. Read on to learn more about this installation process.

Honeywell WiFi Thermostat

Model: RTH65801006 & RTH6500WF Smart Series

Installing Your Thermostat

You might need the following tools to install this thermostat:

  • No. 2 Phillips screwdriver
  • Small pocket screwdriver
  • Pencil
  • Level (optional)
  • Drill and bits (3/16” for drywall,
  • 7/32” for plaster) (optional)
  • Hammer (optional)
  • Electrical tape (optional)
  1. Switch OFF power to your heating/cooling system. Important! To protect your equipment, switch OFF the power to your heating/cooling system at the breaker box or the system switch.Diagram showing system power switch
  2. Remove old thermostat faceplate and leave wires connected.2a. Take a picture of the wire connections for later reference.
    2b. If no wire is connected to a terminal labeled C or no C terminal exists on the old thermostat, view the Alternate Wiring videos at honeywellhome.com/wifi-thermostatIf you have an older thermostat with a sealed mercury tube, turn to page ii for proper disposal instructions.Important! C wire is required and is the primary power source for your thermostat. Without a C wire, your thermostat will not power up. Terminal designation diagram
  3. Label wires.Do not label by wire color. Use the supplied sticky tags to label each wire as you disconnect it. Label wires according to the old thermostat terminal designations, not by wire color. Note: If no tag matches a wire terminal label, write the terminal label on a blank tag. Sticky tags list
  4. Remove wallplate. Remove the old wall plate from the wall after all wires have been labeled and disconnected. Wallplate terminal designation
  5. Separate thermostat and its wallplate.On your new thermostat, grasp the finger holds on the top and bottom of the wallplate with one hand and the thermostat (front) with the other hand. Pull pieces apart. Wallplate for the thermostat
  6. Mount wallplate for thermostat. Mount your new wallplate using screws and anchors included with the thermostat.If necessary:
    Drill 3/16-in holes for drywall. Drill 7/32-in holes for plaster.Mount wallplate with screws going through itNote: You may be able to use your existing wall anchors. Hold the wallplate up to the existing anchors to check for alignment.

Important! The thermostat requires a C wire to operate. The C, or common, wire brings 24 VAC power to the thermostat. Many older mechanical or battery-operated thermostats do not require a C wire. If you don’t have a C wire, try:

  • Looking for an unused wire that is pushed into the wall. Connect that wire to C and check that it is connected to the 24 VAC common at your heating/cooling system.

Note: Not all heating/cooling systems label the 24 VAC common C. Check your system manual or contact the manufacturer to find out which terminal is the 24 VAC common.

Wiring

For conventional heating/cooling systems (natural gas, oil or electric furnace, air conditioner), see page 5. See “Glossary” on page 23 for further definition.

For a heat pump system, see page 7. See “Glossary” on page 23 for further definition.

Wiring (conventional System)

  1. 7A. Wire the thermostat to your conventional system.a. Starting with the C Wire, match the sticky tag on the wire to the terminal labels.You must have a C wire.b. Loosen screw, insert wire on inside edge of terminal, then tighten screw.c. Verify wire is firmly secured by gently pulling on wire.d. Repeat steps a–c for all other wires.e. Push any excess wire back into the wall opening after all wires are installed.f. Continue to page 8.Labels don’t match? See alternate wiring key on pages 6. Only remove the metal jumpers warning

    Note: The wiring for your application might be different from the shown above.

Wiring (heat Pump System Only)

  1. 7B. Wire thermostat to your heat pump.a. Starting with the C Wire, match the sticky tag on the wire to the terminal labelsYou must have a C wire.b. Loosen screw, insert wire on inside edge of terminal, then tighten screw.c. Verify wire is firmly secured by gently pulling on wire.d. Repeat steps a–c for all other wires.e. Push any excess wire back into the wall opening after all wires are installed.f. Continue to Wiring (Heat Pump System Only).Wiring for heat pump only diagram


    Note: If old thermostat has separate wires on AUX andE, place both wires into the E/AUX terminal. If old thermostat has wire on AUX with a jumper to E, place wire on E/AUX terminal. No jumper is required.

    Note: The wiring for your application might be different from the wiring shown above.

Alternate Wiring (conventional System)

Use this if your wire labels don’t match the terminal labels.

Note: You must have a C wire or equivalent.

Alternate wiring diagram

Alternate Wiring Key (conventional System)

  1. Do not use K terminal. For future use.
  2. If your old thermostat had both R and RH wires, remove metal jumper.
  3. Connect the R wire to the RC terminal, and the RH wire to the R terminal.
  4. Remove metal jumper connecting R and RC only if you must connect both R and RC.

Alternate Wiring (heat Pump System Only)

Use this if your wire labels don’t match the terminal labels.

Note: You must have a C wire or equivalent.

Alternate wiring diagram for heat pump setup

Alternate Wiring Key (heat Pump System Only)

  • Do not use K terminal. For future use.
  • If old thermostat has separate wires on AUX and E, place both wires into the E/AUX terminal.
  • If old thermostat has wire on AUX with a jumper to E, place wire on E/AUX terminal. No jumper is required.
  • If your old thermostat had an O wire and not a B wire, attach the O wire to the O/B terminal.
  • If your old thermostat had separate O and B wires, attach the B wire to the C terminal.
  • If another wire is attached to the C terminal, check  honeywellhome.com for help. Attach the O wire to the O/B terminal.
  • If your old thermostat had separate Y1, W1 and W2 wires, check honeywellhome.com for help.
  • If your old thermostat had both V and VR wires, check honeywellhome.com for help.
  • Leave metal jumper between R and RC terminals in place.
  1. 8. Insert quick reference card.Fold quick reference card along score lines, and slide it into the slot on the back of the thermostat.  Quick reference card location
  2. 9. Attach thermostat to wallplate.Align the thermostat to the wallplate and then snap into place. Front and back of the Honeywell WiFi Thermostat device
  3. 10. Switch heating/cooling system ON.Important!10a. Verify that the C wire is connected at the thermostat and at the heating/cooling system.10b. Make sure the heating/cooling system door is firmly secured.10c. Switch power back ON for your heating/cooling system at the breaker box or its power switch. Heating cooling switch
  4. 11. Set clock to current day and time. Setting the clock functions buttons

Setting the date diagram

12.  Determine your heating/cooling system type.

Important! Heating/cooling system type must be set so that your thermostat operates properly and does not damage your system.

12a. If your system type is conventional single stage (natural gas-powered single stage with a/c), continue to “Connecting to your Wi-Fi network” .

12b. If your system is:

  • Conventional multistage heat and cool
  • Any type of heat pump
  • Hydronic
  • Other

If you are not sure of your heating/cooling system type or have other questions, go to honeywellhome.com/support.

You MUST change the system type by setting system function 1. See page 18 to match your thermostat to your system type.

Congratulations! Your thermostat is operational.

Test your thermostat

13a. Press the System button to change to heating or cooling and begin operation.

13b. For remote access to your thermostat, continue to “Connecting to your Wi-Fi network” .

Heating/cooling system not turning on? Refer to page 20 or FAQ at honeywellhome.com/support

Honeywell WiFi Thermostat Installation Manual Image

Manufactured by Honeywell

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