Education
Central
Engage, Apply, Retain
2” Series
Thermostats
Homeowner Support Hotline:
800-284-2925
Note: This module covers common elements. Refer
to Specification Sheet or Installation Instructions for
detailed information.
Education You Can Build On
Emerson 2” Thermostat
Selecting the Right Thermostat for the Job
Heat Pump
Single Stage / Heat Pump
Heat Pump
1/1
✓
1F80-0224
1/1
1/1
1F82-0261
Programming Options
Humidity Control
1/1
Millivolt Compatible
1F80-0261
3-Wire Zone Value
Model Number
Gas/Oil/Electric
Single Stage / Heat Pump
Applications
Heat Pump
Heat
Stages Heat /
Cool by
System
Multi-Stage
Single Stage (SS)
Multi-Stage (MS)
Pump (HP1 or HP2)
Universal (All)
Model
Single Stage
Application Coverage by System
Power Source
Program Days per
Week
Program
Periods per
Day
Hardwire
Battery
Power Assist
✓
5+1+1
4
B,H
✓
✓
24 Hours
4
B,H
2/1
✓
✓
5+1+1
4
B,H
1F86EZ-0251
Easy Set
1/1
1/1
✓
✓
Ø
3 Presets
B,H
1F86-0244
1/1
1/1
✓
✓
Ø
Ø
B,H
1F89EZ-0251
Easy Set
2/1
✓
✓
Ø
3 Presets
B,H
1F89-0211
2/1
✓
✓
Ø
Ø
B,H
2” Series Thermostats Agenda
• Applications
• Wiring
• Configuration
• Programming
Featured Products In This Module
– 1F80-0261
• Single Stage / Programmable
– 1F82-0261
• Multi Stage / Programmable
– 1F86EZ-0251
• Single Stage, with 3 Presets
– 1F89EZ-0251
• Multi Stage / with 3 Presets
Look at the Box for Detailed Information
Staging By System Type
Programming Options
Applications
Terminal Identification
Part Number
2” Series Thermostat Overview
• Single Stage or Two Stage Heat Pump
• Easy-to-Read 2-Square-Inch Blue Display
• Comfort Alert™ Compressor Protection
• Battery Power Monitor
• Choice of Programmable or Non-Programmable
– Easy Set has 3 Pre-Sets: Home-Sleep-Away
• +/-1 Degree Accuracy- For Optimum Comfort and Equipment Life
2” Series
Specification Sheets Contain Detailed Information
2” Series Applications
Application
Conventional or Heat Pump
with No Aux
Heat Pump Only With Aux
Stages
Programming
Type
0
1F86-0244
5+1+1
1F80-0261
3 Presets
1F86EZ-0251
24 Hr
1F80-0224
0
1F89-0211
5+1+1
1F82-0261
3 Presets
1F89EZ-02511
1/1
2/1
Emerson 2” Series Terminal Designations
Conventional
Heat Pump
CONV or HP with No Aux*
HP Only With Aux/Emer **
2" Series
Terminal
W
Description
1F86-0244
0
Programming
1/1
Stages
1st. Stage Heat
1F800261
5+1+1
1F86EZ0251
3 Presets
1F800224
24 Hour
1/1
1/1
1/1
1F89-0211 1F82-0261 1F89EZ-0251
0
5+1+1
3 Presets
2/1
2/1
●
W2
Aux Heat 1st Stage for
HP
Y
1st Stage Compressor
●
●
Reversing Valve
Combined
●
●
G
Fan Relay
●
●
R
24 VAC Hot (TH)
●
●
C
24 VAC Common (TR)
Wire
●
●
L
Diagnostics
O/B
Note:
2/1
●
●
* Requires Field Wiring from Y to W for Heat
Pump
** Heat Pump Only Y is 1st Stage
Batteries
•
Two “AA” alkaline batteries are installed in your thermostat with a
battery tag to prevent power drainage. Prior to use, open the battery
door and remove the battery tag. To open, pull the battery door as
shown by the arrow and lift open
• Thermostat can be powered by system AC power or Battery. If is
displayed, the thermostat is battery powered. If is not displayed,
thermostat is system powered with optional battery back-up
• When “Change ” is displayed, install fresh “AA” alkaline batteries
immediately.
• NOTE: When less than two months of battery life remain, the set
point temperature will offset by 10 degrees (10 degrees cooler in
Heat mode / 10 degrees warmer in Cool mode). If offset occurs, the
normal setpoint can be manually reset with UP or DOWN button .
Another offset will occur within two days if batteries are not replaced.
2” Series Application Selection Switches
•
FAN (GAS/ELEC Switch) Fan Operation
– GAS position lets the equipment operate the fan on a call for heat
– ELEC position lets the thermostat operate the fan on a call for heat—you will use
this position for heat pumps or electric furnaces.
•
O/B (Reversing Valve Switch)
– When used on a heat pump determines if reversing is energized in cooling “O” or
energized in heating “B”
1F80/1F86
1F82/1F89
These switches are on the back of
the thermostat and must be
configured correctly for the
application
Typical Single Stage Wiring
Field Installed Jumper option to convert 1F80
and 1F89 to a single stage heat pump with no
auxiliary heat
NOTE: The 2” Series uses a
push in wire block, not screw
terminals
Two Transformer, No Safety Circuits
Polarity MUST be correct. If the HOT side of the second
transformer is jumpered to the COMMON side of the
first transformer a short will be made and damage will
occur
Two Transformer
Polarity MUST be correct. If the HOT side of the second
transformer is jumpered to the COMMON side of the
first transformer a short will be made and damage will
occur
2” Series Navigation
Day of Week
Actual Room Temperature
Desired Temperature
Time of Day
Temperature or Config
Adjustment Buttons
Battery Status
= Full Charge
= Half Capacity
= Replace Batteries
Heat/Cool/Off Fan Auto/On or
Button
Run Sched Button
2” Series Entering System Configuration
2. Press the Up and Down
button simultaneously
Most technical
service calls are
the result of
improper system
configuration
1. System must be in OFF Mode
2” Series Configuration
Record settings of key
items for Homeowner
Reference
Menu
#
Displayed
(Default)
Press Δ or  to Select
From Listed Options
Comments
1
SS
HP
Selects Single Stage (SS) or Heat Pump (HP, 1 compressor)
2
CS
(OFF)
On
Select Cool Savings Feature On or OFF
1, 2, 3, 4, 5, 6
If CS selected On, selects Cool Savings value
OFF
Select Energy Management Recovery
FA, SL
Select Adjustable Anticipation, Cycle Rate, Heat Single Stage
3
4
5
6
7
8
9
10
11
CS
(3)
E
(On)
CR Heat
(ME)
CR Cool
(FA)
CL
(OFF)
L
(On)
Temp
(0 HI)
F
Change Filter
(OFF)
Change Filter
(200 h)
SL
Select Adjustable Anticipation, Cycle Rate, Cool Single Stage
On
Select Compressor Lockout OFF or On
Off
Select Display Light On or OFF
4 LO to
4 HI
C
On
25 to 1975
Select temperature display adjustment higher or lower
Select F/C Display
Select Filter replacement indicator OFF or On
If Change Filter selected On, selects time interval for Change Filter
Indicator (in 25 hour increments)
Returns to normal operation
2” Series
Programming
Worksheet
Technical Service has never spoken to anyone
who could not program the thermostat once they
filled out the schedule worksheet in the manual
and KEPT it.
Save a call back and fill it out the form from the
homeowners manual with the homeowner. Ensure
they have the Homeowner Support Hotline: 800284-2824
2” Thermostat Buttons and Switches
1.
2.
3.
4.
5.
6.
7.
6
TIME button.
SYSTEM switch (COOL, OFF, HEAT, EMER)
PRGM (program) button.
FAN switch (ON, AUTO).
RUN/HOLD (program) button.
Raises temperature setting.
Lowers temperature setting.
7
3
1
2
NOTE: TIME, PRGM and RUN/HOLD buttons not on nonprogrammable models.
5
4
2” Series Set Time and Day
Set Current Time and Day
1. Press TIME button once. The display will
show the hour only
2. Press and hold either UP or DOWN until
you reach the correct hour and AM/PM
designation (AM begins at midnight; PM
begins at noon)
3. Press TIME once again. The display
window will show the minutes only.
4. Press and hold either UP or DOWN until
you reach the correct minutes.
5. Press TIME once again. The display will
show the day of the week.
6. Press UP or DOWN until you reach the
current day of the week.
7. Press RUN/HOLD once. The display will
show the correct time, day, room
temperature and set-point temperature.
2” Series How To Set A Program
1. Move the SYSTEM switch to Heat or Cool
2. Press PRGM once. “Mo Tu We Th Fr” (indicating weekday
program) will appear in the display.
3. Press UP or DOWN to change the displayed temperature to
your selected temperature for the 1st program period.
4. Press TIME once (the programmed time will flash). Press UP
or DOWN until your selected time appears. The time will
change in 15 minute increments. When your selected time is
displayed, press TIME again to return to the change
temperature mode.
5. Press PRGM once. The currently programmed start time and
setpoint temperature for the 2nd program period will appear.
6. Repeat steps 3 and 4 to select the start time and temperature
for the 2nd program period.
7. Repeat steps 3 through 5 for the 3rd and 4th program periods.
8. Press PRGM once. “SA” (indicating Saturday program) will
appear in the display, along with the start time for the 1st
period and the currently programmed temperature.
9. Repeat steps 3 through 7 to complete Saturday programming.
10.Press PRGM once to change to SU (Sunday) programming
and repeat steps 3 through 7 to complete Sunday
programming.
11.When you have completed entering your program ,press
RUN/HOLD.