Honeywell RTHL2510 Programmable Thermostat User Manual

: June 5, 2024
: Honeywell

Honeywell RTHL2510 Programmable Thermostat User Manual

About your new thermostat

Your new Honeywell thermostat has been designed to give you many years of reliable service and easy-to-use, push-button climate control.

Features

Backlit display is easy to read
Displays ambient (measured) temperature at all times
One-touch access to setpoint temperature
Preset program settings
Temporary and permanent override of schedule
Early start ensures the right temperature at the right time
Built-in compressor protection

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 time and day (required for proper operation) See page 6
Select system setting: Preset to Off To change, see page 7
Select fan setting: Preset to Auto To change, see page 8
Program schedules: Preset to energy-saving levels while you’re at work or asleep To change, see pages 9-12

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

Quick reference to display screen

Display screen

When Heat On or Cool On is flashing, compressor protection is engaged (see page 15).

Set the time and day

Press the SET button, then press or to set the clock time.
Press the button, then press s or t to select the day of the week.
Press to save & exit.

Note: If the clock flashes, the thermostat will follow your settings for the Monday “Wake” time period until you reset the time and day.

Select the system setting

The SYSTEM switch can be set to control your heating or cooling system, depending on the season.

Cool: Cooling system control.
Off: All systems are off.
Heat: Heating system control.

CAUTION: EQUIPMENT DAMAGE

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

Select the fan setting

Set the FA N switch to Auto or On.

In “Auto” mode (the most commonly used setting), the fan runs only when the heating or cooling system is on.

If set to “On,” the fan runs continuously.
Fan setting

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.

WAKE 6:00 am 70 ° Set to the time you awaken and the temperature you want during the morning, until you leave for the day.

LEAVE 8:00 am 62 ° Set to the time you leave home and the temperature you want while you are away (usually an energy-saving level).

RETURN 6:00 pm 70 ° Set to the time you return home and the temperature you want during the evening, until bedtime.

SLEEP 10:00 pm 62 ° Set to the time you go to bed and the temperature you want overnight (usually an energy- saving level).

Energy saving settings for maximum cost savings

This thermostat is pre-set to use 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.)

Wake (6:00 am|

| 70 °| 78 °| 70 °| 78 °
---|---|---|---|---|---
Leave (8:00 am)|

| 62 °| 85 °| 62 °| 85 °
Return (6:00 pm)|

| 70 °| 78 °| 70 °| 78 °
Sleep (10:00 pm)|

| 62 °| 82 °| 62 °| 82 °

To adjust program schedules (RTHL2510)

Press SET until Set Schedule is displayed.
Press or to set your Wake time for the day displayed, then press SET.
Press or to set the temperature for this time period, then press SET.
Set time and temperature for the next time period (Leave). Repeat steps 2 and 3 for each day’s time period.
Press RUN to save & exit

Note: Make sure the thermostat is set to the system you want to program (Heat or Cool).

To adjust program schedules (RTHL2410)

Press SET until Set Schedule is displayed.
Press or to set your weekday Wake time (Mo-Fr), then press SET.
Press or to set the temperature for this time period, then press SET.
Set time and temperature for the next time period (Leave). Repeat steps 2 and 3 for each weekday time period.
Press SET to set weekend time periods (Sa & Su), then press RUN to save & exit.

Note: Make sure the thermostat is set to the system you want to program (Heat or Cool).

About your new thermostat (temporary)

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

“Temporary” will appear on the display and the current program period will flash. The new temperature will be maintained only until the next programmed time period begins (see page 9).
About your new thermostat

To cancel the temporary setting at any time, press RUN.

About your new thermostat (permanent)

Press HOLD to permanently adjust the temperature. This will override the temperature settings for all time periods.

The “Hold” feature turns off the program schedule and allows you to adjust the thermostat manually, as needed.

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

Built – in compressor protection

This feature helps prevent damage to the compressor in your air conditioning or heat pump system.

Damage can occur if the compressor is restarted too soon after shutdown. This feature forces the compressor to wait 5 minutes before restarting.

During the wait time, the display will flash the message Cool On (or Heat On if you have a heat pump). When the safe wait time has elapsed, the message stops flashing and the compressor turns on.
Compressor protection

Early Start

Early Start: This feature allows the heating or cooling to turn on before the program start time, 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 next time period is displayed when the system is activated before a scheduled time period.
Early Start

Battery replacement

Install two fresh AAA batteries when Lo Batt flashes on the screen. Lo Batt appears for 60 days before the batteries are depleted.

Replace batteries once a year, or when you will be away for more than a month.

Most settings are stored in non-volatile (permanent) memory. Only the clock and the day must be set after you replace the batteries.
Battery replacement

Pull at bottom to remove thermostat from wallplate.
Battery replacement

**** Set the System switch to Off before removing the batteries. Otherwise, the heating/cooling system could remain activated even when batteries are removed.

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

To save time, please note your model number and date code before calling.
Battery replacement

Pull at bottom to remove thermostat from wallplate.
Battery replacement

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

Make sure furnace door is closed securely.
Make sure fresh AAA alkaline batteries are correctly installed (see page 17).

Heating or cooling system does not respond

Set system switch to Heat (see page 7). Make sure the temperature is set higher than the Inside temperature.
Set system switch to Cool (see page 7). Make sure the temperature is set lower than the Inside temperature.
Wait 5 minutes for the system to respond.

In case of difficulty

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

Temperature settings do not change

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

“Cool On” or “Heat On” is flashing

The compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor (see page 15).

“Heat On” is not displayed

Set the System switch to Heat, and set the temperature level above the current room temperature (see page 7).

“Cool On” is not displayed

Set the System switch to Cool, and set the temperature level below the current room temperature (see page 7).

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, 1885 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 AMAGE 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. In Canada, write Retail Products ON15-02H, Honeywell Limited/ Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V4Z9.

Automation and Control Solutions

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

U.S. Registered Trademark
© 2013 Honeywell International Inc.
69-2713EF—05 M.S. Rev. 11-13
Printed in U.S.A.
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