Read before installing
Models
Read the entire document
CAUTION:
The TH115 programmable thermostat has three temperature control modes:
A mode:
F mode:
AF mode:
See page 9 on how to change the temperature control mode setting.
Supplied Parts
* Select models only; required for floor heating applications only.
*Place at Off/Standby to cut power to the heater (e.g., in the summer). This will not affect the time and temperature settings.
**When the backlight button or either of the
* The thermostat normally displays the actual (measured) temperature. To view the setpoint temperature, briefly press either of the
NOTE: Connect the wires using the provided solderless connectors for copper wires.
# | Configurations | Up | Down |
1 | Display format | °F / 12 h | °C / 24 h |
2 | Early Start¹ | Enable | Disable |
3 | Temperature control mode² | F A | AF |
To set the clock and the day
NOTE: The thermostat will automatically return to normal display if no button is pressed for 60 seconds.
Daylight Saving Time
When the Daylight Saving Time function is enabled (On), the thermostat automatically switches to Daylight Saving Time on the second Sunday of March and to normal time on the first Sunday of November.
NOTE: The Daylight Saving Time function is disabled (default setting) when the clock loses its setting.
To set the Daylight Saving Time function and to set the date:
NOTE: The thermostat will automatically return to normal display if no button is pressed for 60 seconds.
WARNING: To avoid damaging your floor, follow your floor supplier’s recommendations regarding floor temperature limits.
The minimum and maximum floor temperature limits are 5.0°C (41°F) and 28.0°C (82°F) by default. To modify these limits, proceed as follows:
The thermostat has 3 preset temperatures. Their default settings are shown in the following table.
Preset temperature | Intended use | Icon | A/AF modes | F mode |
Comfort | When at home | 21.0°C (70°F) | 28.0°C (82°F) | |
Economy | When asleep or away from home | 17.0°C (63°F) | 20.0°C (68°F) | |
Vacation | During prolonged absence | 10.0°C (50°F) | 10.0°C (50°F) |
To use a preset temperature:
Briefly press the appropriate preset temperature button (, or ). The preset temperature will become the current setpoint and its icon will appear on the screen.
To modify a preset temperature:
Default schedule
The schedule consists of 4 periods per day, which represents a typical workday. The Comfort (
NOTE: If you wish to use only 2 periods, use the following combinations: “1 and 4” or “2 and 3”. Early Start (see page 9) will not work with any other combinations. You can have a different program every day; i.e., each period can start at a different time every day. The thermostat has been programmed with the following schedule.
Period | Description | Setting | MO | TU | WE | TH | FR | SA | SU |
Wake | Comfort | 6:00 AM | 6:00 AM | 6:00 AM | 6:00 AM | 6:00 AM | 6:00 AM | 6:00 AM | |
Leave | Economy | 8:30 AM | 8:30 AM | 8:30 AM | 8:30 AM | 8:30 AM | –:– | –:– | |
Return | Comfort | 5:00 PM | 5:00 PM | 5:00 PM | 5:00 PM | 5:00 PM | –:– | –:– | |
Sleep | Economy | 11:00 PM | 11:00 PM | 11:00 PM | 11:00 PM | 11:00 PM | 11:00 PM | 11:00 PM |
Modifying the schedule
NOTE: The thermostat will automatically return to normal display if no button is pressed for 60 seconds.
Running the schedule (Automatic mode)
In Automatic mode, the thermostat follows the programmed schedule (see page 14). To place the thermostat in this mode, press Mode/Ret until is displayed.
Temporary override of schedule
If you modify the setpoint temperature (by pressing the
Error Messages
Model | Supply | Maximum current | Maximum wattage | Wiring |
120S | 120 VAC, 50Hz/60Hz | 16.7 A | 2000 W | 4 wires / single pole |
240S | 240 VAC, 50Hz/60Hz 208 VAC, 50Hz/60Hz | 16.7 A | 4000 W 3470 W | 4 wires / single pole |
240D | 240 VAC, 50Hz/60Hz 208 VAC, 50Hz/60Hz | 15 A | 3600 W 3120 W | 4 wires / double pole |
Data protection: In the event of a power failure, most settings are saved. However, the time and Daylight Saving Time must be set if the power failure lasts more than 6 hours. The thermostat will return to the mode that was active prior to the power failure.
Resideo warrants this product, excluding battery, to be free from defects in workmanship or materials, under normal use and service, for a period of three (3) years from the date of first purchase by the original purchaser. If at any time during the warranty period, the product is determined to be defective due to workmanship or materials, Resideo shall repair or replace it (at Resideo’s option).
If the product is defective,
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Resideo that the defect was caused by damage that occurred while the product was in the possession of a consumer. Resideo’s sole responsibility shall be to repair or replace the product within the terms stated above. RESIDEO 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 THAT RESIDES 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 THREE-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 Resideo Customer Care, 1985 Douglas Dr, Golden Valley, MN 55422, or call 1-800-468-1502.
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
69-2617EFS—03 M.S. Rev. 05-20 | Printed in United States
© 2020 Resideo Technologies, Inc. All rights reserved.
The Honeywell Home trademark is used under license from Honeywell International, Inc.
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