The White-Rodgers 1F89EZ-0251 Easy Set thermostat includes a 2 square-inch display that is simple to read. The 1F89EZ-0251 Easy Set thermostat has buttons for Home, Sleep, and Away that allow you to quickly alter the temperature with a single click, putting your preferred temperatures at your fingertips. The 1F89EZ-0251 Easy Set has a sleep timer that will automatically change the temperature from Sleep to Home. The thermostat 1F89EZ-0251 Easy Set is not programmable. On the majority of heat pump systems, the 1F89EZ-0251 Easy Set thermostat will function.
Emerson Climate Technologies, the top supplier of heating, ventilation, air conditioning, and refrigeration systems for residential, industrial, and commercial applications, owns the White-Rodgers company. Emerson Climate Technologies develops dependable, energy-efficient climate systems that enhance human comfort, protect food, and preserve the environment by combining technically superior products and services from market-leading businesses and brands with global engineering, design, distribution, installation, and monitoring capabilities.
Before you begin using your thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons and switches.
Two “AA” alkaline batteries are included with your thermostat. Prior to use, open the battery door and remove the battery tag. We recommend replacing batteries every 2 years, for best results, use new premium brand alkaline batteries such as Duracell® or Energizer®. When the battery power remaining is approximately half, the will be displayed.
WARNING
HOME, SLEEP AND AWAY TEMPERATURE PRE-SETS
HEATING | COOLING | |
70o F | 75o F | |
SLEEP | 62o F | 78o F |
62o F | 83o F |
CHANGE HOME, SLEEP AND AWAY TEMPERATURE PRE-SETS
USE HOME, SLEEP AND AWAY TEMPERATURE PRE-SETS
The sleep timer will automatically change the thermostat from the Sleep to Home temperature after the number of hours set in the configuration menu. The Sleep timer default is 8 hours and can be changed to a setting between 1 to 12 hours.
EXAMPLE: You have selected 8 hours for the Sleep timer in the configuration menu. Press the Sleep button, the thermostat will maintain the sleep temperature for 8 hours. After 8 hours the thermostat will go back to the Home temperature. The Sleep timer will be activated each time the sleep button is pressed.
CHANGE FILTER REMINDER OPTION
The thermostat can display a reminder when it is time to change the air filter on your heating and cooling system. The Change Filter will automatically display after the number of hours set in the configuration menu. The change filter reminder time default is 200 hours and can be changed to a setting of 25 to 1975 hours; 200 hours is approximately 3 months.
EXAMPLE: You have selected 250 hours for the change filter reminder. The thermostat will display change filter after 250 it has counted down 250 hours. When “Change Filter” is displayed, press the or button to clear the display and restart the timer.
COOL SAVINGS™ OPTION
With Cool Savings enabled, the thermostat will make small adjustments to the desired temperature during periods of high demand to reduce cooling system running time and save energy. When the cooling system has been running for more than 20 minutes, humidity in the home will be lower and a higher temperature will feel comfortable. After 20 minutes of run time, the thermostat will start increasing the desired temperature in steps of less than one degree as the system continues to run. These adjustments will eventually cause the system to satisfy the thermostat and turn the system off to reduce the energy consumption. When the Cool Savings feature is active and making adjustments, the display will flash “Save”. The amount of
adjustments to the desired temperature is dependent on the Cool Savings value that is set, 1 being the least adjustment and 6 being the most adjustment. With this feature set to OFF, no change will occur when the cooling system is continuously running during the periods of high demand. Periods of high demand will normally occur during the late afternoon and early evening on the hottest days of the summer.
NOTE
Wires will not be connected to all terminals of the terminal block.
FAN (ELE/GAS) SWITCH
For Electric Heat, heat pump or any system that requires the thermostat to turn on the blower on a call for heat– place the FAN (Ele/Gas) switch (Fig. 1) in the ON position. For Auxiliary and Emergency Heat systems that have a fan control to turn on the blower (independent of the thermostat) place switch in the OFF position.
O/B TERMINAL SWITCH SELECTION
The O/B switch on this thermostat is factory set to the “O” position. This will accommodate the majority of heat pump applications, which require the changeover relay to be energized in COOL. If the thermostat you are replacing or the heat pump being installed with this thermostat requires a “B” terminal, to energize the changeover relay in HEAT, the O/B switch must be moved to the “B” position.
HEATING SYSTEM
FAN OPERATION
If your system does not have a G terminal connection, skip to
HEATING SYSTEM.
COOLING SYSTEM
EMERGENCY SYSTEM
EMER bypasses the Heat Pump to use the heat source wired to terminal W2 on the thermostat. EMER is typically used when compressor operation is not desired, or you prefer back- up heat only.
SELECT CONFIGURATION OPTIONS
The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements.
Menu Screen Number | Displayed (Factory Default) | Press or to select options | |
01 | Sleep (OFF) | On | Select Sleep Timer On or OFF If selected OFF, skip to menu screen 04 |
02 | h (8) | 1 to 12 | Select 1 to 12 hours for Sleep Timer On. See Sleep Timer section on page 3 |
03 | CS (OFF) | On | Select Cool Savings Feature On or OFF If selected OFF, skip to menu screen 06 |
04 | CS (3) | 1 to 6 | Select 1 to 6 for Cool Savings Feature On See Cool Savings section on page 3 |
05 | CR (FA) | SL | Select Adjustable Anticipation, cycle rate for Heat Pump, Heat and Cool. See table below |
06 | CR Aux (FA) | FA | Select Adjustable Anticipation, cycle rate for Aux./Emer Heat. See table below |
07 | CL (OFF) | On | Select Compressor Lockout OFF or On. When selected On, the thermostat will wait 5 minutes before turning the compressor on. |
08 | L (On) | OFF | Select Display Light On of OFF. When selected On and the “C” terminal is connected, the backlight will stay on continuously. When OFF the backlight will come on for a short time when any key is pressed. |
09 | Room Temp (0) | 4 LO to 4 HI | Select room temperature display for 4o higher or 4o lower than the actual temperature |
10 | oF | oC | Select oF or oC Display (temperature displayed in Fahrenheit or Celsius) |
11 | FH (On) | OFF | Select fast second stage On or OFF |
12 | Change Filter (OFF) | On | Select filter maintenance indicator OFF or On. If selected OFF, item B will be skipped |
13 | Change Filter (200 h) | 25 to 1975 | Select 25 to 1975 hours for Change Filter reminder See Change Filter reminder section on page 3 |
TO EXIT THE MENU: Set the system switch to Cool or Heat. If no keys are pressed within fifteen minutes, the thermostat will revert to normal operation.
SELECT CYCLE RATE – The cycle rate can be adjusted to keep the heat or cool on longer or shorter to match the temperature response of the home with your heating and cooling system.
MODE | Fast | Slow |
Heat Pump | (FA) 1.2oF | (SL) 1.7oF |
Aux./Emer Heat | .8oF | 1.2oF |
RESET OPERATION
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you may need to reset the thermostat. To reset, the System Switch must be in Cool, HEAT, or EMER. Simultaneously hold the and buttons for approximately 10 seconds until the display goes blank. If the thermostat has power, has been reset and still does not function correctly contact your heating/cooling service person or place of purchase.
Symptom | Possible Cause | Corrective Action |
No Heat/No Cool/No Fan (common problems) | 1. Blown fuse or tripped circuit breaker. 2. Furnace power switch to OFF. 3. Furnace blower compartment door or panel loose or not properly installed. | Replace fuse or reset breaker. Turn switch to ON. Replace door panel in proper position to engage safety interlock or door switch. |
No Heat | 1. System Switch not set to Heat.
2. Loose connection to thermostat or system 3. Heating System requires service or thermostat requires replacement. | Set System Switch to Heat and raise setpoint above room temperature. Verify thermostat and system wires are securely attached.
Diagnostic: Set System Switch to Heat and raise the setpoint above room temperature. Within a five minutes the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed above. If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, con- tact the furnace manufacturer or a service person to verify the heating system is operating correctly. |
No Cool | 1. System Switch not set to Cool.
2. Loose connection to thermostat or system. 3. Cooling System requires service or thermostat requires replacement | Set System Switch to Cool and lower setpoint below room temperature. Verify thermostat and system wires are securely attached. Same procedure as diagnostic for No Heat condition except set the thermostat to Cool and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling if the compressor lock-out option is selected in the configuration menu. |
Heat, Cool or Fan Runs Constantly | 1. Possible short in wiring. 2. Possible short in thermostat. 3. Possible short in Heat/Cool/Fan system. 4. Fan Switch set to Fan On. | Check each wire connection to verify they are not shorted or touching together. No bare wire should stick out from under terminal screws. Try resetting the thermostat as described below. If the condition persists, the manufacturer of your system or service person can instruct you on how to test the Heat/Cool system for correct operation. If the system operates correctly, replace the thermostat. |
Furnace Cycles Too Fast or Too Slow (narrow or wide temperature swing) | 1. The location of the thermostat and/or the size of the Heating System may be influencing the cycle rate. | The cycle rate adjustment can be found in the configuration menu. If an acceptable cycle rate is not achieved using the FA (Fast) or SL (Slow) adjustment contact a local service person for additional suggestions. |
Cooling Cycles Too Fast or Too Slow (narrow or wide temperature swing) | 1. The location of the thermostat and/or the size of the Cooling System may be influencing the cycle rate. | The cycle rate for cooling is fixed and can not be adjusted. Contact a local service person for suggestions. |
Thermostat Setting and Thermometer Disagree | 1. Thermostat thermometer setting requires adjustment. | The thermometer can be adjusted +/- 4 degrees as listed in the Configuration Menu. No other adjustment is possible. |
Blank Display and/or Keypad Not Responding | 1. Voltage Spike or Static Discharge. | If a voltage spike or static discharge occurs use the Reset Operation listed above. |
Figure 2. Typical wiring diagram for single transformer systems
Thermostat Configuration Options | Thermostat Applications | Maximum Stages Heat/Cool |
Heat Pump 1 | Single Stage Compres- | |
Single Stage Compressor Heat | sor Heat Pump Systems – with Aux./Emergency | 2/1 |
Pump (HP) | Heat |
ELECTRICAL RATING:
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Emerson 1F89EZ-0251 Heat Pump Thermostat User Guide
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