HONEYWELL HOME RTH221 (01) PDF MANUAL

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

This thermostat cannot be used on heat pumps with backup heat or on multistage systems. It will NOT work on multi-stage conventional systems.

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 http://www.thermostat-recycle.org.

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

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

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

Turn Off Power to your Heating/Cooling System at the circuit breaker box or the system’s power switch.

Remove the old thermostat but leave the wallplate with wires attached. Do not remove the wallplate yet. If you have an older thermostat with a sealed mercury tube, refer to the mercury recycling notice for proper disposal instructions.

Label the wires using the supplied wire labels as you disconnect them. Apply these wiring labels to each wire with the appropriate terminal designation as you remove it from the existing thermostat.

Remove the wallplate from the new thermostat. Pull where indicated to remove the 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.

Simply match the wire labels. Insert the wires into the terminals and tighten the screws. If labels do not match letters on the thermostat, check the “Alternate Wiring” instructions.

If wires will be connected to both R and Rc terminals, remove the metal jumper.

Do not use C or X wires. Wrap the bare end of any C or X wire with electrical tape.

If you have a heat pump without auxiliary/backup heat, connect O or B, but not both. If you do not have a heat pump, do not connect B. Wrap the bare end of the B wire with electrical tape if not used.

If you are using a heat pump without auxiliary/backup heat, place a jumper (piece of wire) between Y and W.

Note: This thermostat does not work on Heat Pumps with auxiliary/backup heat.

Install two AAA alkaline batteries into the back of the thermostat.

Move the switch on the back of the thermostat 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 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.)

Install the thermostat onto the wallplate on the wall by aligning the thermostat with the wallplate and pushing gently until it snaps into place.

Turn the power back on to the heating/cooling system at the circuit breaker box or the system power switch.

If your system type is Single Stage Heat and Cool, or Heat Only or Cool Only, your installation is complete after the basic installation steps.

If your system type is a Heat pump, High efficiency furnace, Hot water, Electric furnace, Gas/oil steam, or Gravity system, you should continue with Advanced Installation to match your thermostat to your system type.

To enter system setup, press and hold both the ▲ (Up) and ▼ (Down) buttons until the display changes (approximately 5 seconds).

1. Press the ▲ (Up) or ▼ (Down) button to change the setting for the current function.

2. Press the ▲ (Up) and ▼ (Down) 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 screen.

• 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 schedule

• Built-in compressor protection

Set: Press to set time/day/schedule.

Hold: Press to override programmed temperature control.

Run: Press to resume program schedule.

Temperature adjustment (▲/▼ buttons): Press the up or down buttons until you reach the desired temperature. NOTE: Make sure the SYSTEM switch is set to the system you want to control (Heat or Cool).

System Switch (Heat/Off/Cool): Used to control your heating or cooling system.

• Heat: Heating system control.

• Off: All systems off.

• Cool: Cooling system control.

Fan Switch (Auto/On): Used to control your fan.

• In “Auto” mode, the fan runs only when the heating or cooling system is on.

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

• Setpoint indicator: Appears when the setpoint temperature is displayed.

• Current time

• Current day (RTH2300 only)

• Current program period: Wake/Leave/Return/Sleep

• System status: “Cool on” (Cooling system is on) or “Heat on” (Heating system is on). When “Cool On” is flashing, compressor protection is engaged.

• Low battery warning: “Lo Batt”

• Temperature: The ambient (measured) temperature is normally displayed. To view the setpoint temperature, press the Up or Down button once. The setpoint temperature will appear for five seconds.

1. Press the SET button, then press ▲ (Up) or ▼ (Down) to set the clock time.

2. Press the SET button again, then press ▲ (Up) or ▼ (Down) 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” time period until you reset the time and day.

You can program four time periods each day. The RTH2300 can be programmed with different schedules for weekdays and weekends.

• 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 (RTH2300 only).

The recommended pre-set settings are:

1. Press SET until “Set Schedule” is displayed.

2. Press ▲ (Up) or ▼ (Down) to set your weekday Wake time (Mo-Fr), then press SET.

3. Press ▲ (Up) or ▼ (Down) 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).

1. Press SET until “Set Schedule” is displayed.

2. Press ▲ (Up) or ▼ (Down) to set your Wake time (Mo-Su), then press SET.

3. Press ▲ (Up) or ▼ (Down) 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 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).

Press ▲ (Up) or ▼ (Down) 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).

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

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.

If the filter reminder is turned on during installation (System Setup Function 21), 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.

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.

To replace batteries:

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

2. Pull at the bottom to remove the thermostat from the wallplate.

3. Turn the thermostat over, insert fresh AAA alkaline batteries, then reinstall the thermostat.

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

Make sure fresh AAA alkaline batteries are correctly installed.

• Set system switch to Heat. Make sure the temperature is set higher than the Inside temperature.

• Set system switch to Cool. Make sure the temperature is set lower than the Inside temperature.

• Wait 5 minutes for the system to respond.

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).

The compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor.

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

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