Home

href="
Model: 1F89EZ-0251  
Heat Pump  
Emerson Blue Easy Set  
2H/1C  
Non-Programmable Thermostat with 3 Temperature Pre-Sets  
Home, Sleep and Away  
Installation Instructions and User Guide  
Message to Homeowner  
Congratulations on choosing the Emerson Blue Easy Set  
Thermostat. The Easy Set is designed to be the easiest  
thermostat you have ever used. This thermostat features  
Home, Sleep, and Away temperature pre-sets. Just press  
the button and go. Included with the easy set is the same  
temperature accuracy and reliability you expect from all the  
Emerson Blue thermostats.  
3 Simple Pre-Sets  
Just Press the Button and Go!  
This thermostat is intended for use with a low voltage NEC  
Class II system. Do not use this thermostat with a line voltage  
system. If in doubt about whether your wiring is millivolt, line,  
or low voltage, have it inspected by a qualified heating and air  
conditioning contractor or electrician.  
Table of Contents  
Get to know your thermostat.......................................2  
Thermostat buttons and switches ...............................2  
Display.........................................................................2  
Batteries ......................................................................2  
Do not exceed the specification ratings.  
All wiring must conform to local and national electrical codes  
and ordinances.  
Using your thermostat .................................................3  
Home, Sleep and Away temperature pre-sets............3  
Sleep Timer option ......................................................3  
Change Filter reminder option ....................................3  
Cool Savings option ....................................................3  
This control is a precision instrument, and should be handled  
carefully. Rough handling or distorting components could  
cause the control to malfunction.  
Installation .....................................................................4  
Remove the old thermostat.........................................4  
Install the new thermostat ...........................................4  
Set switches ................................................................4  
Check thermostat operation........................................4  
Select configuration options........................................5  
Configuration menu.....................................................5  
Troubleshooting Guide ................................................6  
Technical Data...............................................................7  
Wiring diagrams ..........................................................7  
Thermostat application guide......................................8  
Specifications ..............................................................8  
PART NO. 37-7208A  
1050  
href="
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.  
Set at  
Home  
1
2
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).  
FAN switch (ON, AUTO).  
5
4
5
3
The Display  
6
Indicates desired temperature. This is blank when  
Set at  
6
12  
13  
7
system switch is in the OFF position. Desired  
temperature is displayed (flashing) if the thermostat is in  
lockout mode.  
“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.  
Service  
Change  
Home Sleep  
Away  
10  
14  
AUX  
Save  
Change Filter  
EMER  
7
9
8
11  
15  
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.  
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.  
12  
“Serviceindicatesadiagnosticfaultintheheating/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.  
9
Displays current temperature.  
15  
“EMER” is displayed flashing when the system switch is  
in EMER position.  
10  
“Home”,“Sleep”,“Awayindicates the easy temperature  
pre-set is enabled.  
Batteries  
CAUTION  
If the home is going to be unoccupied for an extended  
period (over 3 months) and is displayed, the  
batteries should be replaced before leaving. When  
less than two months of battery life remain, the  
setpoint temperature will change by 10 degrees (10  
degrees cooler in Heat / 10 degrees warmer in Cool)  
to alert you to change the batteries before they fail. If  
the temperature change occurs, the normal setpoint  
can be manually reset. However, the temperature will  
change by 10 degrees within two days if the batteries  
are not replaced.  
!
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 battery power remaining is  
approximately half, the  
will be displayed.  
Change  
Indicates batteries are low  
and should be replaced  
BATTERY LOCATION  
“AA” Alkaline Batteries  
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  
thermostat and could cause personal injury and/or  
property damage.  
Thermostatinstallationandallcomponentsofthesystem  
shall conform to Class II (current limited) circuits per the  
NEC code. Failure to do so could cause a fire hazard.  
2
href="
Using your thermostat  
Change Home, Sleep and Away  
Temperature Pre-sets  
Home, Sleep and Away Temperature  
Pre-Sets  
1. Move SYSTEM switch to HEAT position.  
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.  
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.  
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.  
4. Repeat the process for the remaining Pre-sets to be  
changed.  
Factory Pre-set Temperatures  
HEATING  
70o F  
COOLING  
75o F  
5. Move SYSTEM switch to COOL to Pre-set Temperatures  
for cooling.  
62o F  
78o F  
SLEEP  
Use Home, Sleep and Away Temperature Pre-Sets  
62o F  
83o F  
1. Press the Home, Sleep, or Away button. The display  
will show the icon for the button pressed and display the  
temperature setting.  
Your Pre-set Temperatures  
HEATING COOLING  
2. The thermostat will maintain the selected pre-set  
temperature until you change it by pressing the  
button or selecting another Pre-set Temperature.  
or  
SLEEP  
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.  
3
href="
Installation  
Battery  
Door  
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  
Mounting  
Hole  
Mounting  
Hole  
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.  
FAN  
(Ele/Gas)  
Switch  
Opening  
for wires  
3. Move base out of the way and drill mounting holes.  
4. Push wires through wire opening.  
O/B  
Switch  
Figure 1.Thermostat Base  
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.  
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.  
Press down  
L
G
Y
W2  
O/B  
Insert  
Wire  
C
O/B Terminal Switch Selection  
R
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.  
Wire Terminal Block  
NOTE  
Wires will not be connected to all terminals of the terminal  
block.  
Cooling System  
Check Thermostat Operation  
1. Move SYSTEM switch to COOL position.  
Heating System  
2. Press  
to adjust thermostat setting below room  
1. Move SYSTEM switch to HEAT position. If the heating  
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).  
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  
3. Press  
to adjust temperature setting above room  
temperature. The heating system should stop operating.  
temperature. The cooling system should stop operating.  
Fan Operation  
Emergency System  
If your system does not have a G terminal connection, skip to  
Heating 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 OFF position.  
2. Move fan switch to ON position. The blower should begin  
to operate.  
1. Move SYSTEM switch to EMER position, EMER will flash  
on the display.  
3. Move fan switch to AUTO position. The blower should stop  
immediately.  
2. Press  
to adjust the thermostat above room tempera-  
ture. 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 tempera-  
ture. The AUX heating system should stop operating  
4
href="
Installation  
Select Configuration Options  
The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements.  
Enter Menu  
Menu Navigation  
SYSTEM  
Press  
ome  
and hold  
for 3 seconds  
Press  
for next. Press  
to go back  
Configuration Menu  
Menu Screen  
Displayed  
(Factory Default)  
Press  
to select options  
or  
Number  
01  
Sleep  
(OFF)  
On  
Select Sleep Timer On or OFF  
If selected OFF, skip to menu screen 04  
02  
03  
04  
05  
06  
h
(8)  
1 to 12  
On  
Select 1 to 12 hours for Sleep Timer On.  
See Sleep Timer section on page 3  
CS  
(OFF)  
Select Cool Savings Feature On or OFF  
If selected OFF, skip to menu screen 06  
CS  
(3)  
1 to 6  
SL  
Select 1 to 6 for Cool Savings Feature On  
See Cool Savings section on page 3  
CR  
(FA)  
Select Adjustable Anticipation, cycle rate for Heat Pump, Heat  
and Cool. See table below  
FA  
Select Adjustable Anticipation, cycle rate for Aux./Emer Heat.  
See table below  
CR Aux  
(FA)  
07  
08  
CL  
(OFF)  
On  
Select Compressor Lockout OFF or On. When selected On,  
the thermostat will wait 5 minutes before turning the  
compressor on.  
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  
10  
11  
12  
13  
Room Temp  
(0)  
4 LO to  
4 HI  
oC  
Select room temperature display for 4o higher or 4o lower than  
the actual temperature  
Select oF or oC Display (temperature displayed in Fahrenheit or  
Celsius)  
oF  
FH  
(On)  
OFF  
Select fast second stage On or OFF  
Change Filter  
(OFF)  
On  
Select filter maintenance indicator OFF or On.  
If selected OFF, item B will be skipped  
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  
(FA)  
(SL)  
Heat Pump  
1.2oF  
.8oF  
1.7oF  
1.2oF  
Aux./Emer Heat  
5
href="
Troubleshooting  
Reset Operation  
If a voltage spike or static discharge blanks out the display or for approximately 10 seconds until the display goes blank. If  
causes erratic thermostat operation, you may need to reset the thermostat has power, has been reset and still does not  
the thermostat. To reset, the System Switch must be in Cool, function correctly contact your heating/cooling service person  
HEAT, or EMER. Simultaneously hold the  
and  
buttons or place of purchase.  
Symptom  
Possible Cause  
Corrective Action  
No Heat/No Cool/No Fan 1. Blown fuse or tripped circuit breaker.  
Replace fuse or reset breaker.  
Turn switch to ON.  
Replace door panel in proper position to engage safety  
interlock or door switch.  
(common problems)  
No Heat  
2. Furnace power switch to OFF.  
3. Furnace blower compartment door or  
panel loose or not properly installed.  
1. System Switch not set to Heat.  
Set System Switch to Heat and raise setpoint above room  
temperature.  
2. Loose connection to thermostat or  
system  
Verify thermostat and system wires are securely attached.  
3. Heating System requires service or  
thermostat requires replacement.  
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.  
Set System Switch to Cool and lower setpoint below room  
temperature.  
2. Loose connection to thermostat or  
system.  
3. Cooling System requires service or  
thermostat requires replacement  
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.  
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.  
4. Fan Switch set to Fan On.  
Furnace CyclesToo Fast 1. The location of the thermostat and/or  
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.  
orToo Slow (narrow or  
wide temperature swing)  
the size of the Heating System may be  
influencing the cycle rate.  
Cooling Cycles Too Fast 1. The location of the thermostat and/or  
The cycle rate for cooling is fixed and can not be adjusted.  
Contact a local service person for suggestions.  
or Too Slow (narrow  
or wide temperature  
swing)  
the size of the Cooling System may  
be influencing the cycle rate.  
Thermostat Setting and 1. Thermostat thermometer setting  
The thermometer can be adjusted +/- 4 degrees as listed  
in the Configuration Menu. No other adjustment is possible.  
Thermometer Disagree  
requires adjustment.  
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.  
6
href="
Technical Data  
Figure 2.Typical wiring diagram for single transformer systems  
THERMOSTAT  
SYSTEM  
**  
L
O/B  
Y
G
W2  
C
R
SYSTEM  
MONITOR  
SWITCH  
Changeover  
Relay*  
Fan  
Relay  
Aux/Emergency  
Heat Relay  
(Stage 2)  
Compressor  
Contactor  
Hot  
24 VAC  
120 VAC  
Neutral  
Changeover Relay is energized in COOL when O/B switch is in the “O” position  
Changeover Relay is energized in HEAT when O/B switch is in the “B” position  
*
TRANSFORMER  
(Class II Current Limited)  
The 24 volt neutral connection to terminal C on the thermostat is not required if you  
replace the batteries once a year with fresh “AA” alkaline batteries.  
**  
THERMOSTAT APPLICATION GUIDE  
ATTENTION!  
This product does not contain mercury. However, this product  
may replace a unit which contains mercury.  
Thermostat  
Configuration  
Options  
Maximum  
Stages  
Heat/Cool  
Thermostat  
Applications  
Do not open mercury cells. If a cell becomes damaged, do  
not touch any spilled mercury. Wearing nonabsorbent gloves,  
take up the spilled mercury and place into a container which  
can be sealed. If a cell becomes damaged, the unit should be  
discarded.  
Heat Pump 1  
Single Stage  
Compressor Heat  
Pump (HP)  
Single Stage Compres-  
sor Heat Pump Systems  
- with Aux./Emergency  
Heat  
2/1  
Mercury must not be discarded in household trash. When the  
unit this product is replacing is to be discarded, place in a  
to send the product containing mercury.  
Specifications  
Electrical Rating:  
Battery Power or Hardwire ................................. 20 to 30 VAC, 50/60 Hz or DC  
Terminal Load............................................................ 1.5 A per terminal, 2.5 A maximum all terminals combined  
Setpoint Range.......................................................... 45° to 90°F (7° to 32°C)  
Differential  
Fast  
Slow  
1.7°F  
1.2°F  
Heat Pump ......................................................... 1.2°F  
Aux./Emer Heat.................................................. .8°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  
7
href="
Homeowner Help Line: 1-800-284-2925  
White-Rodgers is a division  
of Emerson Electric Co.  
The Emerson logo is a  
trademark and service mark  
of Emerson Electric Co.