RTH2510/RTH2410 Programmable Thermostat Series Owner’s Manual Read and save these instructions. For help please visit yourhome.honeywell.com Identify System Type This thermostat is compatible with the following systems: • • • • • • • Gas, oil or electric furnace Central air conditioner Hot water system with or without pump Millivolt system Central heating and cooling system Heat pump without auxiliary/backup heat Heat pump with auxiliary/backup heat Do you need assistance? We are here to help.
ATTENTION: MERCURY RECYCLING NOTICE Hg N O M E R C U RY N O B OT E MERCURIO This product does not contain mercury. However, this product may replace a product that contains mercury. Mercury and products containing mercury should not be discarded in household trash. For more information on how and where to properly recycle a thermostat containing mercury in the United States, please refer to the Thermostat Recycling Corporation at www.thermostat-recycle.org.
Table of contents Overriding schedules temporarily ......14 Overriding schedules permanently ....14 Compressor protection .......................15 Early Start ..........................................15 Change Filter .....................................16 Replace batteries ...............................16 Installation Installation ............................................3 Advanced Installation ...........................9 About your new thermostat Controls and Home screen quick reference..........
2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached. If you have an older thermostat with a sealed mercury tube, turn to page 2 for proper disposal instructions. Do not remove wallplate yet Terminal designation C C 3 Label Wires with Tags Label the wires using the supplied wire labels as you disconnect them. Wire Labels C C Terminal designation M28100 4 Separate Wallplate from New Thermostat Remove wallplate from the new thermostat and mount onto wall.
Mount Wallplate Mount the new wallplate using the included screws and anchors. W/ Aux Not Used M32714 Drill 3/16-in. holes for drywall Drill 3/32-in. holes for plaster 6 Connect Wires Simply match wire labels. If labels do not match letters on the thermostat, check “Alternate Wiring (Conventional Systems)” on page 6 and connect to terminal as shown (see notes, below). WIRE HOLE G INSERT WIRES AND TIGHTEN SCREWS R Y W SCREW W LABELED WIRES Remove metal jumper if you have both R and Rc wires.
Alternate Wiring (Conventional Systems) If labels do not match letters on the thermostat, check the chart below and connect to terminal as shown here (see notes, below). 4 B O G Y 4 W/ NOT R AUX USED Rc M32726 If wires will be connected to both R and Rc terminals, remove metal jumper. Do not use C or X. Wrap bare end of wire with electrical tape. If you have a heat pump without auxiliary/backup heat connect O or B, not both. If you do not have a heat pump, do not connect B.
Alternate wiring (for heat pumps with auxiliary or backup heat only) If labels do not match letters on the thermostat, check the chart below and connect to terminal as shown here (see notes, below). 6 7 5 3 L E C B F X X2 O G H X B B Y F O G 4 1 7 2 W W1 W2 Y1 M Y R AUX RC V VR NOT W/ AUX USED R Rc 2 M32728 Leave metal jumper in place, connecting R & Rc terminals. If your old thermostat had both V and VR wires, stop now and contact a qualified contractor for help.
Set fan operation switch Move the switch to the proper setting: RTHXXXX Gas or Oil: For gas or oil heating systems, leave the fan operation switch in this factory-set position (for systems that control the fan in a call for heat). GAS OR OIL ELECTRIC OR HEAT PUMP Electric or Heat Pump: Change the switch to this setting for heat pump or electric heat systems. (This setting is for systems that allow the thermostat to control the fan in a call for heat, if a fan wire is connected to the G terminal.
11 If your system type is... If your system type is: T Single Stage Heat and Cool T Heat Only or Cool Only Congratulations, you’re done! If your system type is: T Heat Pump* with Backup Heat Continue with Advanced Installation to match your thermostat to your system type. *Heat Pump—an air conditioner that provides cooling in the summer, and also runs in reverse in the winter to provide heating. If you are not sure of your system type or if you have other questions, call us toll-free at 1-800-468-1502.
NOTE: If you do not press any button for 60 seconds while you are in the setup menu, the thermostat automatically saves any changes made and exits the menu. Function Description Press the V or W button to 1 select system type 0 Heating & cooling: Gas, oil or electric heating with central air conditioning or heat pump without auxiliary/back-up heat. 1 Heat pump with auxiliary/backup heat: Outside compressor provides both heating and cooling.
Thermostat controls Temperature adjustment Press the up or down buttons until you reach the desired temperature. Set: Press to set time/day/schedule. Hold: Press to override programmed temperature control. Set Hold Run Run: Press to resume program schedule. Fan Fan Auto On Auto On Heat Off Cool Heat Off Cool M33612 System Switch is used to control your heating or cooling system. • Heat: Heating system control. • Off: All systems off. • Cool: Cooling system control.
Set the time and day 1. Press the SET button, then press V or W to set the clock time. 2. Press the SET button, then press V or W to select the day of the week. 3. Press RUN to save & exit. Set Time 6:30 Set Hold am Run M33598 NOTE: If the clock flashes, the thermostat will follow your settings for the Monday “Wake” time period until you reset the time and day.
To adjust program schedules (RTH2510) 1. Press SET until Set Schedule is displayed. 2. Press V or W to set your Wake time for the day displayed, then press SET. 3. Press V or W to set the temperature for this time period, then press SET. 4. Set time and temperature for the next time period (Leave). Repeat steps 2 and 3 for each day’s time period. 5. Press RUN to save & exit. NOTE: Make sure the thermostat is set to the system you want to program (Heat or Cool).
Program schedule override (temporary) Press V or W to immediately adjust the temperature. This will temporarily override the temperature setting for the current time period. Set Hold 70 Temporary 6:30 Set am Run “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 12). M33602 Set Hold 6:30 am 75 Set Run To cancel the temporary setting at any time, press RUN.
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. 6:30 am We 75 Cool On Wake 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.
Change Filter If the filter reminder is turned on during installation, the words Change Filter will flash on the screen when the filter needs to be replaced. 75 Change Filter – Press & Hold Run to Reset 6:30 Set Hold am Set Run After you replace the air filter, press and hold the RUN button for 3 seconds to reset the alert. M33632 Battery replacement Pull at bottom to remove thermostat from wallplate. Install two fresh AAA batteries when Lo Batt flashes on the screen.
Troubleshooting 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. Make sure fresh AAA alkaline batteries are correctly installed. Heating or cooling system does not respond • Set system switch to Heat.
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).
Wiring Labels ~tiquettes de fils R6tulos para los cables Apply these wiring labels to each wire with the appropriate terminal designation as you remove it from the existing thermostat. Lorsque vous retirez les fils des bornes du thermostat existant, collez ces etiquettes sur chaque fil correspondant aIa lettre de Ia borne. Coloque estos r6tulos, con Ia designaci6n de las term ina • les, en cada cable al remove_r los cables del termostato actual.
Hone ywell DO NOT RETURN TO STORE! CALL 1-800 -468- 1502 . If you have installation or other produc t questio ns, contac t us toll-fre e at 1-800-468-1502. ® U.S. Registered Trademark. © 2008 Honeywell Internationa l Inc. Printed in Mexico 69-2213EFS -02 M.S.
A ATTENTION: MERCURY RECYCLING NOTICE This product does not contain mercury. However, this product may replace a product that contains mercury. Mercury and products containing mercury should not be discarded in household trash. For more information on how and where to properly recycle a thermostat containing mercury in the United States, please refer to the Thermostat Recycling Corporation at www.thermostat-recycle.org.