Honeywell RTH7400/RTH7500 Series Programmable Thermostat User Manual

RTH7400/RTH7500 Series

This is a legacy product document supported by Resideo. It is no longer manufactured

This manual covers the RTH7400 and RTH7500 models.

(Pull thermostat from wallplate and turn over to find model number)
This thermostat contains a Lithium battery which may contain Perchlorate material.
Perchlorate Material—special handling may apply,
See www.dtsc.ca.gov/hazardouswaste/perchlorate

CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not operate cooling system when outdoor temperature is below 50°F (10°C).

Need Help?
For assistance with this product please visit http://yourhome.honeywell.com
or call Honeywell Customer Care toll-free at 1-800-468-1502

Read and save these instructions.

® U.S. Registered Trademark. Patents pending.
US Patent No. 6,595,430; 7,114,554; 7,274,972; 7,225,054 and other patents pending
Copyright © 2013 Honeywell International Inc. All rights reserved.

This thermostat is ready to go!
Your new thermostat is pre-programmed and ready to go.
See page 3 to check settings.

About your new thermostat

Congratulations! You’ve just purchased the world’s most advanced, easy-to-use thermostat. It has been designed to give you many years of reliable service and climate control.

Features

Easy-to-follow menu programming.
One-touch temp control overrides program schedule at any time.
Precise comfort control keeps temperature within 1°F of the level you set.
Change/check reminder lets you know when to replace furnace filter.
Large display with backlight is easy to read—even in the dark.

This thermostat is ready to go!

Your new thermostat is pre-programmed and ready to go. All you have to do is set the time and day. Then check the settings below and change if needed:

Set clock…………………………………………………………………………………….See page 6
Select fan setting: Preset to Auto………………………………….To change, see page 7
Select system setting: Preset to Heat……………………………To change, see page 8
Program schedules: Preset to energy-saving levels while you’re at work or asleep (assumes you wake at 6 am, leave at 8 am, return at 6 pm and go to bed at 10 pm)………………………….To change, see pages 10–14

ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time, and manually adjust the temperature (see pages 13–14).

Quick reference to controls

Arrow buttons

Quick reference to status display

Clock setting

To set the current time display, press CLOCK, then press or to adjust the time. Press and holds or t to advance the time more quickly.

Press DONE to save & exit (or press GO BACK to exit without changing the time).

Note: The real-time clock should never require adjustment since it automatically updates for daylight savings time, and stores all date/time information.

Note: To change the current week day display, see System Setup in your Installation Guide.

Fan setting

Press SYSTEM & FAN, then FAN to select fan operation:

On: Fan is always on.
Auto: Fan runs only when the heating or cooling system is on.

System setting

Follow steps at left to select system:

Heat: Thermostat controls only the heating system.
Cool: Thermostat controls only the cooling system.
Auto: Thermostat automatically selects heating or cooling depending on the indoor temperature.
Off: All systems are off.
Em Heat (only for heat pumps with auxiliary heat): Thermostat controls Emergency and Auxiliary Heat. Compressor is locked out.

Note: The Auto and Em Heat system settings may not appear depending on how your thermostat was installed.

Save money by setting program schedules

It’s easy to program your system for maximum energy savings. You can program four time periods each day, with different settings for weekdays and weekends.

Energy saving settings for maximum cost savings

This thermostat is pre-set with energy saving program settings. We recommend these settings, since they can reduce your heating/cooling expenses. (See next page to adjust times and temperatures of each time period.)

To adjust program schedules (RTH7400 only)

Press SCHEDULE, then EDIT to see weekdays.
Press SELECT DAY to highlight Mon-Fri (they will share the same settings).
Press NEXT STEP twice, then press or to set Wake time for selected days.
Press NEXT STEP, then or to set Heat temperature for this time period.
Press NEXT STEP, then or to set Cool temperature for this time period.
Repeat steps 3-5 to program other time periods (LEAVE, RETURN, SLEEP), then press DONE.
Repeat steps 1-6 to program Saturday/Sunday. (Press or until the desired day is flashing, then press SELECT DAY.)
Press DONE to save & exit.

To adjust program schedules (RTH7500 only)

Press SCHEDULE, then EDIT to see weekdays.
Press SELECT DAY. You can select multiple days to program with the same settings.
Press NEXT STEP twice, then press or to set Wake time for selected day(s).
Press NEXT STEP, then or to set Heat temperature for this time period.
Press NEXT STEP, then or to set Cool temperature for this time period.
Repeat steps 3-5 to program other time periods (LEAVE, RETURN, SLEEP), then press DONE.
Repeat steps 1-6 to program any remaining days. (Press or until the desired day is flashing, then press SELECT DAY.)
Press DONE to save & exit.

Program schedule override (temporary)

Press or to immediately adjust the temperature. This will temporarily override the temperature setting for the current time period.

The new temperature will be maintained until the next time period.

When the timer expires, the program schedule will resume and set the temperature to the level you’ve programmed for the current time period.

To cancel the temporary setting at any time, press USE SCHEDULE.

Program schedule override (permanent)

Press or to adjust temperature, then press HOLD. This will turn off the program schedule.

Whatever temperature you set will be maintained 24 hours a day, until you manually change it, or press USE SCHEDULE to cancel “Hold” and resume the program schedule.

Auto Changeover

Use this feature in climates where both air conditioning and heating are used on the same day. When the system mode is in Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature.

While in the Auto mode, if a schedule override takes place (temporarily or permanently) the thermostat will automatically adjust the cooling and heating settings to maintain a 3-degree separation between the cool and heat settings.

For example, if the heat temperature is raised to where it gets within 3-dgrees of the cool setting, the display will show an up arrow next to “cool” to show the thermostat is raising the cool setting up to maintain a 3-dgreee separation.

The display will also show both “Auto” and either “Heat” or “Cool” for which temperature setting you are currently adjusting. Press the system button to select between the heat and cool to view/adjust either mode.

If the cool temperature is lowered to where it gets close to the heat setting, an arrow next to heat will show the thermostat is lowering the heat setting down to maintain a 3-degree separation.

CAUTION: To avoid possible compressor damage, do not use Auto Changeover if the outside temperature drops below 50°F (10°C).

Filter reminder

If activated during installation, the furnace filter reminder alerts you when it is time to replace your filter.

Press RESET after changing the filter, to restart the timer.
To reset the reminder interval before it expires:

Press MORE, then NEXT.
Press RESET.
Press DONE to save and exit.

Special features

Smart Response® Technology: 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.

Compressor Protection: This feature forces the compressor to wait a few minutes before restarting, to prevent equipment damage. During the wait time, the message “Wait” is displayed on screen.

Auto Changeover: This feature is used in climates where both air conditioning and heating are used on the same day. When the system is set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature. Heat and cool settings must be at least 3 degrees apart. The thermostat will automatically adjust settings to maintain this 3-degree separation.

CAUTION: To avoid possible compressor damage, do not use Auto Changeover if the outside temperature drops below 50°F (10°C).

Battery replacement

Customer assistance

For assistance with this product, please visit http://yourhome.honeywell.com
or call Honeywell Customer Care toll-free at 1-800-468-1502.

In case of difficulty

If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily.

Display is blank

Check circuit breaker and reset if necessary.
Make sure power switch at heating & cooling system is on.
Make sure furnace door is closed securely.
If thermostat is battery powered, make sure fresh AA alkaline batteries are correctly installed (see page 19).

No response to key presses (or temperature will not change)

Make sure heating and cooling temperatures are set to acceptable ranges:

Heat: 40° to 90°F (4.5° to 32°C).
Cool: 50° to 99°F (10° to 37°C).

Heating or cooling system does not respond

Press SYSTEM to set system to Heat. Make sure the temperature is set higher than the Inside temperature.
Press SYSTEM to set system to Cool. Make sure the temperature is set lower than the Inside temperature.
Check circuit breaker and reset if necessary.
Make sure power switch at heating & cooling system is on.
Make sure furnace door is closed securely.
If “Wait” is displayed, the compressor protection timer is on. Wait 5 minutes for the system to restart safely, without damaging the compressor (see page 18).

1 year limited warranty

Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If at any time during the warranty period the product is determined to be defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option).
If the product is defective,

return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or
call Honeywell Customer Care at 1-800-468-1502. Customer Care will make the determination whether the product should be returned to the following address: Honeywell Return Goods, Dock 4 MN10-3860, 1985 Douglas Dr. N., Golden Valley, MN 55422, or whether a replacement product can be sent to you.

This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer.

Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE-YEAR DURATION OF THIS WARRANTY.

Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

If you have any questions concerning this warranty, please write Honeywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502.

Automation and Control Solutions

Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
http://yourhome.honeywell.com

Honeywell Limited
705 Montrichard Avenue
Saint-Jean-sur-Richelieu, Quebec
J2X 5K8

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Honeywell RTH7400/RTH7500 Series Programmable Thermostat User Manual

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