Honeywell Home RTH221B Programmable Thermostat User Guide

Honeywell Home RTH221B 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 pump
• Millivolt system
• Central heating and cooling system
• Heat pump without 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 heat pumps with backup heat or 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

NO MERCURY

 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
   Circuit breaker box
    Or
   Heating/cooling system power switch
   
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.
   
   
3. Label Wires with Tags
   Label the wires using the supplied wire labels as you disconnect them
   
4. Separate Wallplate from New Thermostat
   Remove wallplate from the new thermostat and mount onto 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 terminal as shown (see notes, below).
   
   Thermostat does not work on Heat Pumps with auxiliary/backup heat. We are here to help. Call 1-800-468-1502 for wiring assistance.

Alternate Wiring

   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. Wrap bare end of 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 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 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 Thermostat onto Wallplate
Install thermostat onto the wallplate on the wall.

Turn Power Back On
Circuit breaker box
 or
Heating/cooling system power switch

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
• High-efficiency furnace
• Hot water
• Electric furnace
• Gas/oil steam
• Gravity system
  Continue with Advanced Installation to match your thermostat to your system type.

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 multistage conventional systems.

Advanced Installation

Enter System Setup

To enter the 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   or button to	Setting
   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.
   14	select Fahrenheit or Celsius temperature display	0   Fahrenheit temperature display (°F)1   Celsius temperature display (°C)
   15*	select Compressor Protection settings	1 On0 Off
   20	select clock display	0   12-hour display1   24-hour display
   40 (RTH2300only)	restore program schedule to default settings	0   Off1   On: Program schedule default settings are listed on page 11.

   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” is displayed on screen.

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 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

Thermostat controls

Set: Press to set time/day/schedule.
Hold: Press to override programmed temperature control.
Run: Press to resume program schedule.
System Switch is used to control your heating or cooling system.

• Heat: Heating system control.
• Off: All systems off.
• Cool: Cooling system control.

Temperature adjustment
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).
Fan Switch is 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.

Display screen

• Setpoint indicator
  Appears when the setpoint temperature is displayed.
• Current day/time
• Current program period
  Wake/Leave/Return/Sleep
• System status
  • Cool on: Cooling system is on.
  • Heat on: Heating system is on.
    When Cool On is flashing, compressor protection is engaged.
• Low battery warning
• 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.

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 (RTH2300)

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).

To adjust program schedules (RTH221)

1. Press SET until Set Schedule is displayed.
2. Press  or  to set your Wake time (Mo-Su), 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 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  or  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 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).

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.

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 batteries are removed.

Troubleshooting

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

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.

The heating or cooling system does not respond

• 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.

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.
© 2015 Honeywell International Inc.
33-00100ES—01 M.S. 07-15
Printed in the U.S.A.

Reference:

Download Manual:

Honeywell RTH221 Series Programmable Thermostat Owner’s Manual

Honeywell Home RTH221B Programmable Thermostat User Guide

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