Emerson Thermostats 1F89EZ-0251 Heat Pump Thermostat User Guide

Emerson Thermostats 1F89EZ-0251 Heat Pump Thermostat

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Introduction

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.

GET TO KNOW YOUR THERMOSTAT

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.

THE THERMOSTAT BUTTONS AND SWITCHES

1. Raises temperature setting.

2. Lowers temperature setting.

3. Easy Temperature pre-sets (Home, Sleep, Away).

4. SYSTEM switch (COOL, OFF, HEAT, EMER).

5. FAN switch (ON, AUTO).
   THE DISPLAY

6. Indicates the desired temperature. This is blank when the system switch is in the OFF position. Desired temperature is displayed (flashing) if the thermostat is in lockout mode.

7. “Save” indicates the Cool Savings feature is enabled in the configuration menu. “Save” flashing indicates Cool Savings feature is operating and saving energy. “Save” will also flash for 3 seconds after changing the temperature to indicate that a pre-set can be saved.

8. Indicates system mode. Heat icon () is displayed when the SYSTEM switch is in the HEAT position. Heat icon() is displayed flashing when thermostat is calling for heat. Cool icon () is displayed when the SYSTEM switch is in the COOL position. Cool icon () is displayed (flashing) if the thermostat is calling for cool.

9. Displays current temperature.

10. “Home”, “Sleep”, “Away” indicates the easy temperature pre-set is enabled.

11. “Change Filter” is displayed when the system has run for the programmed filter time period as a reminder to change or clean your air filter.

12. “Service” indicates a diagnostic fault in the heating/cooling system. It does not indicate a fault in the thermostat.

13. indicates power level of batteries. “Change ” indicates batteries should be replaced.

14. “AUX” indicates auxiliary stage is operating.

15. “EMER” is displayed flashing when the system switch is in EMER position.

BATTERIES

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

• Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard.
• Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage the thermostat and could cause personal injury and/or property damage.
• Thermostat installation and all components of the system shall conform to Class II (current limited) circuits per the NEC code. Failure to do so could cause a fire hazard.

USING YOUR THERMOSTAT

HOME, SLEEP AND AWAY TEMPERATURE PRE-SETS

• You can set your (Home, Sleep, Away) temperatures for use when you get home, go to sleep, or leave home. Then, just press the button you want and go.
• Favorite Temperatures are set at the factory as indicated in the following table. You can use pre-sets or change to different temperature pre-sets.

FACTORY PRE-SET TEMPERATURES

SLEEP

| 62o F| 78o F
 | 62o F| 83o F

CHANGE HOME, SLEEP AND AWAY TEMPERATURE PRE-SETS

1. Move SYSTEM switch to HEAT position.
2. Using the or  button, set the desired temperature.
3. Press and hold the Home, Sleep, or Away button for 3 seconds. The display will go blank (except for the battery icon and heat/cool icon) and back on again indicating that the thermostat has saved your pre-set.
4. Repeat the process for the remaining Pre-sets to be changed.
5. Move SYSTEM switch to COOL to Pre-set Temperatures for cooling.

USE HOME, SLEEP AND AWAY TEMPERATURE PRE-SETS

1. Press the Home, Sleep, or Away button. The display will show the icon for the button pressed and display the temperature setting.
2. The thermostat will maintain the selected pre-set temperature until you change it by pressing the or  button or selecting another Pre-set Temperature.

SLEEP TIMER OPTION

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.

INSTALLATION

REMOVE THE OLD THERMOSTAT

1. Turn off power to the heating and cooling system.
2. Remove the front cover of the old thermostat, this usually pulls off.
3. Loosen the screws that hold the thermostat to the wall.
4. Identify each wire attached to the old thermostat.
5. Disconnect the wires from old thermostat one at a time. DO NOT LET WIRES FALL BACK INTO THE WALL.

INSTALL THE NEW THERMOSTAT

1. Open the battery door and detach the new thermostat cover from the base.
2. With the base flush against the wall, mark mounting hole locations on wall.
3. Move base out of the way and drill mounting holes.
4. Push wires through wire opening.
5. Position the base on the wall again and screw the mounting screws into the wall anchors.
6. Connect each wire coming from the wall to its corresponding terminal as shown in Fig. 2 on page 7.

NOTE

Wires will not be connected to all terminals of the terminal block.

SET SWITCHES

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.

CHECK THERMOSTAT OPERATION

HEATING SYSTEM

1. Move SYSTEM switch to HEAT position. If the heating system has a standing pilot, be sure to light it.
2. Press to adjust thermostat setting to 1° above room temperature. The heating system should begin to operate.
3. Press to adjust temperature setting below room temperature. The heating system should stop operating.

FAN OPERATION

If your system does not have a G terminal connection, skip to

HEATING SYSTEM.

1. Move the SYSTEM switch to OFF position.
2. Move fan switch to ON position. The blower should begin to operate.
3. Move fan switch to AUTO position. The blower should stop immediately.

COOLING SYSTEM

1. Move SYSTEM switch to COOL position.
2. Press to adjust thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation. However, if the setpoint temperature is flashing, the compressor lockout feature is operating (see Configuration menu, item 5).
3. Press to adjust temperature setting above room temperature. The cooling system should stop operating.

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.

1. Move SYSTEM switch to EMER position, EMER will flash on the display.
2. Press to adjust the thermostat above room temperature. The Aux heating system will begin to operate. The Flame icon () will display flashing to indicate that the Aux system is operating.
3. Press to adjust the thermostat below room temperature. The AUX heating system should stop operating

SELECT CONFIGURATION OPTIONS

The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements.

CONFIGURATION MENU

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.

Heat Pump

| (FA)

1.2oF

| (SL)

1.7oF

Aux./Emer Heat| .8oF| 1.2oF

TROUBLESHOOTING

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.

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 APPLICATION GUIDE

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|

SPECIFICATIONS

ELECTRICAL RATING:

• BATTERY POWER OR HARDWIRE: 20 to 30 VAC, 50/60 Hz or DC
• TERMINAL LOAD: 5 A per terminal, 2.5 A maximum all terminals combined
• SETPOINT RANGE: 45° to 90°F (7° to 32°C)
• DIFFERENTIAL: Fast, Slow
• HEAT PUMP: 2°F, 1.7°F
• /EMER HEAT: .8°F, 1.2°F
• OPERATING AMBIENT: 32° to +105°F (0° to +41°C)
• OPERATING HUMIDITY: 90% non-condensing max.
• SHIPPING TEMPERATURE RANGE: -40° to +150°F (-40° to +65°C)
• DIMENSIONS THERMOSTAT: 3-3/4” H x 4-3/4” W x 1-1/2” D

FAQs

I have 7 wires. Is this compatible?****

yes, I’m using it on a heat pump works fine.

is there a wall plate?****

There isn’t a back-plate included with this thermostat.

When aux. heat is activated? in emer. mode of course but that’s all? does it also turn on under certain conditions in heat mode? thank you!!****

Aux heat will come on in the heat mode when heat pump is unable to satisfy the set temp.

Is this thermostat compatible with a 4 wire hook up?****

Yes, it is.

Is this compatible with a Trane Hvac?****

I have it installed on a Trane Heat pump that has electric heat as a backup. (An all-electric home) Haven’t touched in years. I really like the Temperature set beck feature.

Is there a way to “jump out” the em? mode when it’s in normal heat mode? Will not turn on heat coils in heat mode.****

The one I have is for a hear pump type system. On regular heat the compressor does the hearing. On EMG heat that’s the coils that use 220v. So through the thermostat, no not really, for a hear pump that is. You can in the unit itself . But call someone for that.

This is to let you know the size is incorrect online. This unit is 4.5 x 3.5 not 6.2 x 4.5. I bought it for the size, to cover my holes, so I am not****

I believe that the larger dimension is the size of box that it comes in.

What degree should my heat pump’s thermostat be set to?****

The ideal temperature for comfort and energy efficiency during the fall and winter, according to the Department of Energy, is 68°F.

What heat pump setting is the most cost-effective?****

There are three summer heat pump modes. The least energy-intensive option is “fan,” which may be sufficient when you just need a little respite, but it won’t cool the room, so remember to turn it off before leaving.

Is maintaining a heat pump’s temperature constant preferable?****

An alternative is a heat pump. It operates most effectively when a certain temperature is maintained. Choose the appropriate setting, then leave it alone so that it can function.

What is a typical thermostat issue?****

A typical thermostat problem that frequently causes the temperature to never reach the desired level.

How can I tell whether my thermostat is functioning correctly?****

common thermostats: Ask a friend or family member to help. Have one person stand by the furnace and the other by the thermostat. Turn the thermostat gradually to the heat setting to raise the temperature.

How can you tell whether your thermostat is set properly?****

The accuracy and efficiency of the thermostat are good if it displays the same temperature as your thermometer.

Is 72 a good heat setting for the winter?****

When you’re at home in the winter, the best thermostat setting is 68 degrees Fahrenheit.

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