Honeywell RTH2300 Series Programmable Thermostat User Guide

Honeywell RTH2300 Series Programmable Thermostat

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 a pump
• Millivolt system
• Central heating and cooling system
• Heat pump without auxiliary/backup heat

For more advanced scheduling options, you may also check our guide on the Honeywell RTH7500 Series Programmable Thermostat.

Do you need assistance? We are here to help.

• Visit http://honeywellhome.com/support for wiring assistance before returning the thermostat to the store.
• This thermostat cannot be used on heat pumps with backup heat or on multistage systems.

1. Turn Off the 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 letters on the thermostat, check “Alternate Wiring” on page 6 and connect to the terminal as shown here (see notes below). The thermostat does not work on Heat Pumps with auxiliary/backup heat.

Alternate Wiring

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

Install Batteries

Set the 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 onto the wallplate on the wall.

Turn Power Back On

Turn the power back on to the heating/cooling system

If your system type is

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

If your system type is

• Heat pump
• High-efficiency furnace
• Hot water
• Electric furnace
• Gas/oil steam
• Gravity system
  Continue with Advanced Installation to match your thermostat to your system type. This thermostat works on 24-volt or 750 mV systems. It will NOT work on multistage conventional systems.

Advanced Installation

Enter System Setup

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

Changing Settings

1. Press the s or t button to change the setting.
2. Press the s and t 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.

Compressor Protection: This feature forces the compressor to wait approximately 5 minutes before restarting, to prevent equipment damage. During the wait time, the message “Cool On” or “Heat On” flashes on the screen.

If you’re looking for a thermostat with more advanced features, explore the Honeywell RTH8500 Series Programmable Thermostat.

About your new thermostat

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

• Backlit display on RTH2300
• Displays ambient (measured) temperature at all times
• One-touch access to setpoint temperature
• Preset program settings
• Temporary and permanent override of the schedule
• Built-in compressor protection

Thermostat controls

Display screen

Set the time and day

1. Press the SET button, then press s or t to set the clock time.
2. Press the SET button, then press s or t to select the day of the week. (RTH2300 only)
3. Press RUN to save & exit.

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

Program Schedule

You can program four time periods each day. The RTH2300 can be programmed with different schedules for weekdays and weekends. We recommend the preset 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 the time you leave home and the temperature you want while you are away (usually an energy-saving level).
• Return
  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 (RTH2300 only

To adjust program schedules (RTH2300)

1. Press SET until Set Schedule is displayed.
2. Press s or t to set your weekday Wake time (Mo-Fr), then press SET.
3. Press s or t to set the Honeywell RTH2300 Series Programmable Thermostat temperature for this period, then press SET.
4. Set time and temperature for the next period (Leave). Repeat steps 2 and 3 for each weekday 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 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 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 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.

NOTE: Make sure the thermostat Honeywell RTH2300 Series Programmable 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.Change filter (RTH2300 only)

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. After you replace the air filter, press and hold the RUN button for 3 seconds to reset the alert.

Battery replacement

• Install two fresh AAA batteries when the battery 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 nonvolatile (permanent) memory. Only the clock and the day must be set after you replace the batteries. Pull at the bottom to remove the thermostat from the wallplate.
• Set the System switch to Off before removing the batteries. Otherwise, the heating/cooling system could remain activated even when batteries are removed.

Electrical Ratings

Troubleshooting

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

For Wi-Fi-enabled troubleshooting and smart features, visit our Honeywell RTH9585WF Touchscreen Thermostat User Guide.

   Display is blank

• Make sure fresh AAA alkaline batteries are correctly installed.

  The 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 Honeywell RTH2300 Series Programmable Thermostat 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.

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

1-year limited warranty

For assistance with this product, please visit
http://honeywellhome.com/support

Customer assistance

• For assistance with this product, please visit http://honeywellhome.com/support.
• 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.