


1. Turn power OFF

To protect yourself and your equipment, Turn off the power at the breaker box or switch that controls your heating/cooling system.
2 Check that your system is off.

Change the temperature on your old thermostat. If you don’t hear the system turn on within 5 minutes, the power is off.
Note: If you have a digital thermostat that has a blank display, skip this step
3 Remove the old thermostat’s faceplate.

On most thermostats, you can take off the faceplate by grasping and gently pulling. Some thermostats may have screws, buttons, or clasps.
Do not remove any wires from your thermostat at this time!
4 Make sure there are no 120/240V wires.

Do you have thick black wires with wire nuts? Is your thermostat 120V or higher?
If you answered yes to either of these questions, you have a line voltage system and the thermostat will not work.
5 Take a picture of how your wiring looks right now.

Be sure to include the letters next to the terminals where the wires are inserted. This will be a helpful reference when wiring your thermostat.
Tip: If the color of your wires has faded or if 2 terminals have the same wire color, use the wire labels provided in the package to label each wire.
6. Remove any jumpers

A jumper connects one terminal to another terminal. It may look like a small staple or even a colored wire and must be removed before continuing. Use a screwdriver to release wires from terminals.
The RTH7400/RTH7500 thermostat does not need jumpers.
7 Record if you have wires in the following terminals.

Do not include jumpers as a part of your count. The thermostat does not need jumpers.
8 Write down the color of the wires.
Check mark the wires that are connected to terminals. Next to the check mark, write down the color of the wire.
Do not include jumpers as a part of your count. Check all that apply (Not all will apply):


The RTH7400/RTH7500 thermostat does not support L/A, S, or U terminals. If there are wires in terminals that are not listed, you will need additional wiring support.
9 Disconnect the wires and remove the old wall plate.


Use a screwdriver to release wires from terminals. Then, use a wire label to identify each wire as it’s disconnected. The letter on the wire label should match the letter on the terminal.
Tip: To prevent wires from falling back into the wall, wrap the wires around a pencil.

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.

It is recommended that you use the wall anchors included in the box to mount your thermostat. You can use the UWP to mark where you want to place the wall anchors.
a) Level the wall plate.
b) Mark the location of the wall anchors using a pencil.
c) Drill the holes.
d) Insert wall anchors.
e) Make sure anchors are flush with wall.
Tip: Use a 7/32 drill bit
12 Set R-switch position and insert R-wire or wires.
Set the R-switch up or down based on your wiring notes in Step 7
Insert wires into the inner holes of the terminals on the UWP. The tabs will stay down once the wire is inserted.
If you have 1 R-wire (R,Rh, or Rc)
1. Set R-switch to the up position.
2. Insert your R-wire (R, Rh or Rc) into R-terminal.
or If you have 2 R-wires (R or Rh, and Rc)
1. Set R-switch to the down position.

2. Insert your Rc wire into Rc-terminal
3. Insert your R or Rh wire into R-Terminal.
13 Connect wires from Step 8.

Depress the tabs to put the wires into the inner holes of their corresponding terminals on the UWP (one wire per terminal) until it is firmly in place.
Gently tug on the wires to verify they are secure.
Tip: If you need to release the wires again, push down the terminal tabs on the sides of the UWP.
14 Mount the UWP and close the door.
Mount the UWP using the provided screws. Install all three screws for a secure fit on your wall. Close the door after you’re finished.

15 Confirm wiring matches snapshot.
Please confirm wiring matches terminals from the photo you took in Step 5.
16 Install batteries.
Insert two AA alkaline batteries in the back of the thermostat as shown.

17 Attach your thermostat.

Align the thermostat onto the UWP and firmly snap it into place.
18 Turn your power ON.

Turn on the power at the breaker box or switch that controls the heating/ cooling system.
19 Set the date.

20 Choose a clock format.

Press + or - set the clock format: 12 hour (standard for North America) or 24 hour. Press Select.
21 Set the time.

NOTE: If this is not a new installation, see page 14 for entering setup menu.
22 Select System Setup options.

Press + or - to change values or select from available options. Then press Select to save changes and advance to the next System Setup number.
See “System Setup options” below for a full list of System Setup numbers and options.
Repeat until all of the System Setup options have been set. The thermostat will automatically save and exit to the Home screen.
23 Continue to “System operation settings” on page 10.

120 Scheduling Options
Note: You can change default MO-FR, SA-SU schedule here. To edit periods during days, temperature setpoints, or to turn Schedule On/Off, touch MENU and go to SCHEDULE.
125 Temperature Indication Scale
200 Heating System Type
Note: This option selects the basic system type your thermostat will control.
205 Heating Equipment Type
Conventional Forced Air Heat:
Heat Pump:
Radiant Heat:
Note: This option selects the equipment type your thermostat will control. Note: This feature is NOT displayed if feature 200 is set to Cool Only.
218 Reversing Valve O/B
Note: This option is only displayed if the Heat Pump configured. Select whether reversing valve O/B should energize in cool or in heat.
220 Cool Stages / Compressor Stages 200=Conv / 200=HP
Note: Select how many Cool or Compressor stages of your equipment the thermostat will control. Maximum of 2 Cool/Compressor Stages. Set value to 0 if you do not have Cool Stage/Compressor Stage.
221 Heat Stages / Backup Heat Stages Heat Stages
Note: Select how many Heat or Aux/E stages of your equipment the thermostat will control. Maximum of 2 Heat Stages for conventional systems. Maximum of 1 Aux/E stage for systems with more than 1 heating equipment type. Set value to 0 if you do not have Heat Stage/ Backup Heat Stage.
300 System Changeover
Note: Thermostat can automatically control both heating and cooling to maintain the desired indoor temperature. To be able to select “automatic” system mode on thermostat home screen, turn this feature ON. Turn OFF if you want to control heating or cooling manually.
425 Smart Response
430 Minimum Cool Temperature Setpoint (RTH7500 Only)
Note: The cool temperature cannot be set below this level.
431 Maximum Heat Temperature Setpoint (RTH7500 Only)
Note: The heat temperature cannot be set above this level.
711 Air Filter 1 Replacement Reminder
Note: Set a reminder for when to change your air filter. Choose either calendar or equipment run time-based reminder.
1415 Daylight saving time
Note: Set to Off in areas that do not follow Daylight Saving Time.
NOTE: Once you have cycled through all of the System Setup numbers, Done is displayed. Press Select to save and exit.
1 Press the Mode button to cycle to the next available System mode.
2 Cycle through the modes until the required System mode is displayed and leave it to activate.

NOTE: Available System modes vary by model and system settings.
System modes:
‒ Auto: Thermostat selects heating or cooling as needed.
‒ Heat: Thermostat controls only the heating system.
‒ Cool: Thermostat controls only the cooling system.
‒ Em Heat (only for heat pumps with auxiliary heat): Thermostat controls Auxiliary Heat. Compressor is not used.
‒ Off: Heating and cooling system is off. Fan will still operate if fan is set to On or Circulate.
NOTE: Heat/Cool flash for 5 minutes due to compressor protection.
1 Press the Fan button to cycle to the next available Fan mode.
2 Cycle through the modes until the required Fan mode is displayed and leave it to activate.

NOTE: Available Fan modes vary with system settings.
Fan modes:
‒ Auto: Fan runs only when the heating or cooling system is on.
‒ On: Fan is always on.
‒ Circ (RTH7500 Only): Fan circulates randomly about 33% of the time.

You can program four time periods each day, with different settings for weekdays and weekends. We recommend the pre-set settings (shown in the table below), since they can reduce your heating/cooling expenses.
NOTE: To temporarily or permanently override any of the above program schedules, see page 12.





1 Press + or - to adjust the temperature.
2 TEMPORARY HOLD is displayed and the setpoint temperature flashes. While it’s flashing, press Hold (Mode) button to change to Permanent Hold.
3 To cancel the Permanent Hold, press + or - and then press Cancel.
Alternate wiring (conventional systems)
If labels do not match terminals, connect wires as shown below (see notes, below).
NOTES:
1. If you must connect both R and Rc wires, set the R Slider Tab to the down position (2 wires).
2. If your old thermostat had both R and RH wires, set the R Slider Tab to the down position (2 wires). Then connect the R wire to the Rc terminal, and the RH wire to the R terminal.
3. If your old thermostat had only 1 C or C1 wire, connect it to the C terminal. If your old thermostat had 2 C or C1 wires, wrap each separately with electrical tape and do not connect them.

Connect wires: heat pump
1 Match each labeled wire with same letter on new thermostat.
2 Insert the wires into the matching terminal.
NOTE: If you have difficulty inserting wires, you may have to press down the terminal push button next to the corresponding terminal. Labels don’t match? If labels do not match letters on thermostat, see page 13.

Alternate wiring (for heat pumps only)
NOTES:

NOTE: Do NOT use W for heat pump applications. Auxiliary heat must wire to AUX or E.
1 Press and hold Menu and + buttons for approximately 5 seconds to enter advanced menu.

2 Press Select to enter System Setup (ISU) menu.
3 Press Select to cycle through System Setup numbers.
NOTE: See “System Setup options” on page 8 for a full list of System Setup numbers and options

4 Press + or - to change values or select from available options.
5 Press Select to save changes and advance to the next System Setup number.

6 Once you have cycled through all of the System Setup numbers, “Done” is displayed. Press Select to save and exit. To save and exit early, press Home to return to the Home screen.

This feature allows the thermostat to “learn” how long the furnace and air conditioner take to reach programmed temperature settings, so the temperature is reached at the time you set. For example: Set the Wake time to 6 am, and the temperature to 70°. The heat will come on before 6 am, so the temperature is 70° by the time you wake at 6. The message “Recovery” is displayed when the system is activated before a scheduled time period.

Batteries are required to provide power. Install fresh batteries immediately when the low battery icon appears. The icon appears about two months before the batteries are depleted.
Even if the low battery icon does not appear, you should replace batteries once a year, or before leaving home for more than a month.
If batteries are inserted within two minutes, the time and day will not have to be reset. All other settings are permanently stored in memory, and do not require battery power.
NOTE: When replacing batteries, alkaline batteries are recommended.


on the home screen. You can access alerts in the Menu to view the error/alert code. Once viewed the home screen will maintain the alert symbol until it is cleared.




Number 170
Alert/Reminder Internal Memory Error
Definition The memory of the thermostat has encountered an error. Please replace the thermostat.
Number 173
Alert/Reminder Thermostat Temperature Sensor Error
Definition The sensor of the thermostat has encountered an error. Please replace the thermostat.
Number 181
Alert/Reminder Replace Air Filter (1)
Definition Replace air filter (1). Reset the timer by touching the "dismiss" button on thermostat screen after it is replaced.
Number 405
Alert/Reminder Low Battery Alert
Definition The batteries are getting low. Replace them within two months.
Number 407
Alert/Reminder Critical Low Battery
Definition The batteries are almost depleted and should be replaced as soon as possible.
If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily.
Display is blank
Cannot change system setting to Cool
Fan does not turn on when heat is required
Heating system is running in cool mode
Heating or cooling system does not respond
Heat On / Cool On flashing on the screen
Heat pump issues cool air in heat mode, or warm air in cool mode
Electrical Ratings
Terminal Voltage (50/60Hz) Running Current
W Heating 20-30 Vac 0.02-1.0 A
W2 (Aux) Heating 20-30 Vac 0.02-1.0 A
E Emergency Heat 20-30 Vac 0.02-0.5 A
Y Compressor Stage 1 20-30 Vac 0.02-1.0 A
Y2 Compressor Stage 2 20-30 Vac 0.02-1.0 A
G Fan 20-30 Vac 0.02-0.5 A
O/B Changeover 20-30 Vac 0.02-0.5 A
L/A Input Unused Unused
NOTE: Not for use with 250, 500, or 750 MV systems.
Reference file: Honeywell RTH7560E1001/U 7-Day Flexible Programmable Thermostat
Series: RTH7400, RTH7500 Series
Additionally, the document applies to other Honeywell models: RTH7400, RTH7500