Honeywell RTHL2510 Series Programmable Thermostat Owner’s Manual

Honeywell RTHL2510 Series Programmable Thermostat

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.
Call 1-800-468-1502 for wiring assistance before returning the thermostat to the store.

This thermostat cannot be used on multistage systems.

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.

For mercury thermostat recycling in Canada, please refer to Switch the Stat at www.switchthestat.ca.

NOTICE:
To avoid possible compressor damage, do not run air conditioner if the outside temperature drops below 50°F (10°C).

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. Pull at the bottom to remove the thermostat from the wallplate. Turn the thermostat over to find the model number and date code.

Installation

1. Turn Off Power to the Heating/Cooling System

2. Remove Old Thermostat
   Remove the old thermostat but leave the wallplate with wires attached. If you have an older thermostat with a sealed mercury tube, turn to page 2 for proper disposal instructions.

3. Label Wires with Tags
   Label the wires using the supplied wire labels as you disconnect them.

4. Separate Wallplate from New Thermostat
   Remove the wallplate from the new thermostat and mount it onto the wall.

5. Mount Wallplate
   Mount the new wallplate using the included screws and anchors.

   • 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 the letters on the thermostat, check “Alternate Wiring (Conventional Systems)” on page 6 and connect to the terminal as shown (see notes, below).
   We are here to help. Call 1-800-468-1502 for wiring assistance.

Alternate Wiring (Conventional Systems)
If labels do not match the letters on the thermostat, check the chart below and connect to the terminal as shown here (see notes, below).

1. If wires will be connected to both R and Rc terminals, remove the metal jumper.
2. Do not use C or X. Wrap the bare end of the wire with electrical tape.
3. 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. Wrap the bare end of the wire with electrical tape.
4. Place a jumper (a piece of wire) between Y and W if you are using a heat pump without auxiliary/backup heat.

Alternate Wiring (Heat Pump)
If labels do not match the letters on the thermostat.

Alternate wiring (for heat pumps with auxiliary or backup heat only)
If labels do not match the letters on the thermostat, check the chart below and connect to the terminal as shown here (see notes, below).

1. Leave metal jumper in place, connecting R & Rc terminals.
2. If your old thermostat had both V and VR wires, stop now and contact a qualified contractor for help.
3. If your old thermostat had separate O and B wires, wrap the B wire in electrical tape and do not connect.
4. If your old thermostat had Y1, W1, and W2 wires, stop now and contact a qualified contractor for help.
5. Do not use C or X wire. Do not use B wire if you already have O wire. Wrap the bare end of the wire with electrical tape.
6. Do not use L wire. Wrap the bare end of the wire with electrical tape.

If your old thermostat had E and Aux wires (or alternate wires), connect both wires to the Aux terminal.

Install Batteries
Install two AAA alkaline batteries.

Set fan operation switch
Move the switch to the proper setting:

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).

Electric or Heat Pump:
Change the switch to this setting for heat pumps 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.).

Install Thermostat onto Wallplate

Install the thermostat on the wallplate on the wall.

Turn Power Back On
Turn the power back on to the heating/cooling system.

If your system type is

If your system type is:

• Single Stage Heat and Cool
• Heat Only or Cool Only

Congratulations, you’re done!

If your system type is:

• 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.
This thermostat works on 24-volt or 750 mV systems. It will NOT work on multi- stage conventional systems.

Advanced Installation

Enter System Setup
To enter system setup, press and hold both the and buttons until the display changes (approximately 5 seconds).

Changing Settings

1. Press the or button to change the setting.
2. Press the and buttons simultaneously for one second to advance to the next function.
3. Press the RUN button to exit and save settings.

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 .6. or T button to

|

Setting

---|---|---
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.

5| select your heating system and optimize its operation| 5 Gas or oil furnace: Use this setting if you have a standard gas or oil furnace that is less than 90% efficient.

6 Electric furnace: Use this setting if you have any type of electric heating system.

3 Heat pump, hot water or high-efficiency furnace: Use this setting if you have a hot water system or a gas furnace of greater than 90% efficiency.

2 Gas/oil steam or gravity system: Use this setting if you have a steam or gravity heat system.

13| select Early Start| 1 On

0 Off

14| select Fahrenheit or Celsius temperature display| 0 Fahrenheit temperature display (°F)

1 Celsius temperature display (°C)

15*| select Compressor Protection settings| 1 On

0 Off

20| select clock display| 0 12-hour display

1 24-hour display

40| restore program schedule to default settings| 0 Off

1 On: Program schedule default settings are listed on page 12.

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.

• Backlit display is easy to read
• Displays ambient (measured) temperature at all times
• One-touch access to the 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

Thermostat controls

Display screen

Set the time and day

1. Press the SET button, then press or to set the clock time.
2. Press the SET button, then press or to select the day of the week.
3. Press RUN 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.

Program Schedule

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.

• Wake – Set to the time you awaken and the temperature you want during the morning, until you leave for the day.
• Leave – Set to the time you leave home and the temperature you want while you are away (usually an energy-saving level).
• Return – Set to the time you return home and the temperature you want during the evening, until bedtime.
• Sleep – Set to the time you go to bed and the temperature you want overnight (usually an energy-saving level).
• NOTE: Leave and Return periods can be canceled on weekends.

To adjust program schedules (RTHL2510)

1. Press SET until Set Schedule is displayed.
2. Press or to set your Wake time for the day displayed, then press SET.
3. Press or 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).

To adjust program schedules (RTHL2410)

1. Press SET until Set Schedule is displayed.
2. Press or to set your weekday Wake time (Mo-Fr), then press SET.
3. Press or 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 weekday time period.
5. 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).

Program schedule override (temporary)
Press s or t 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. To cancel the temporary setting at any time, press RUN.

NOTE:
Make sure the thermostat is set to the system you want to control (heat or cool).

Program schedule override (permanent)
Press HOLD to permanently adjust the temperature. This will override the temperature settings for all time periods. The “Hold” feature turns off theprogram 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.

NOTE:
Make sure the thermostat is set to the system you want to control (heat or cool).

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.

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.

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.

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

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 the circuit breaker and reset it if necessary.
• Make sure the power switch at the heating & cooling system is on.
• Make sure the furnace door is closed securely.
• Make sure fresh AAA alkaline batteries are correctly installed.

Heating or cooling system does not respond

• Set the system switch to Heat. Make sure the temperature is set higher than the Inside temperature.
• Set the system switch to Cool. Make sure the temperature is set lower than the Inside temperature.
• Wait 5 minutes for the system to respond.

Temperature settings do 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).

“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.

“Heat On” is not displayed

• Set the System switch to Heat, and set the temperature level above the current room temperature.

“Cool On” is not displayed

• Set the System switch to Cool, and set the temperature level below the current room temperature.

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

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

1. return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or
2. 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 that 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
yourhome.honeywell.com
® U.S. Registered Trademark.

References

• Fire Alarm Resources | Download fire alarm documents
• Switch the 'Stat – Stewardship Program Focused on Recovering and Recycling Thermostat
• Home - Thermostat Recycling Corporation (TRC)

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