Education You Can Build On

2” SeriesThermostats

Homeowner Support Hotline: 800-284-2925

Education CentralEngage, Apply, Retain

Note: This module covers common elements. Refer to Specification Sheet or Installation Instructions for

detailed information.

Application Coverage by System Model

Stages Heat / Cool by System

Applications Programming Options Power Source

Single Stage (SS) Multi-Stage (MS)

Heat Pump (HP1 or HP2) Universal (All)

Model NumberSingle Stage

Multi-Stage

Heat

Pump

Gas/Oil/Electric

3-Wire Zon

e Valu

e

Millivolt Compatible

Humidity Control

Program Days per Week

Program Periods per Day

Hardwire Battery

Power Assist

Single Stage / Heat Pump1F80-0261 1/1   1/1 ✓   ✓   5+1+1 4 B,H

1F80-0224 1/1   1/1 ✓   ✓   24 Hours 4 B,H

Heat Pump 1F82-0261     2/1 ✓   ✓   5+1+1 4 B,H

Single Stage / Heat Pump1F86EZ-0251

Easy Set 1/1   1/1 ✓   ✓   Ø 3 Presets B,H

1F86-0244 1/1   1/1 ✓   ✓   Ø Ø B,H

Heat Pump1F89EZ-0251

Easy Set     2/1 ✓   ✓   Ø 3 Presets B,H

1F89-0211     2/1 ✓   ✓   Ø Ø B,H

Emerson 2” ThermostatSelecting the Right Thermostat for the Job

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

Staging By System TypeProgramming OptionsApplications

Terminal Identification Part Number

Look at the Box for Detailed Information

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” SeriesSpecification Sheets Contain Detailed Information

2” Series Applications

Application Stages Programming Type

Conventional or Heat Pump with No Aux 1/1

0 1F86-0244

5+1+1 1F80-0261

3 Presets 1F86EZ-0251

24 Hr 1F80-0224

Heat Pump Only With Aux 2/1

0 1F89-0211

5+1+1 1F82-0261

3 Presets 1F89EZ-02511

Emerson 2” Series Terminal Designations

2" SeriesConventional Heat Pump

CONV or HP with No Aux* HP Only With Aux/Emer **

Terminal Description 1F86-02441F80-0261

1F86EZ-0251

1F80-0224 1F89-0211 1F82-0261 1F89EZ-0251

  Programming 0 5+1+1 3 Presets 24 Hour 0 5+1+1 3 Presets

  Stages 1/1 1/1 1/1 1/1 2/1 2/1 2/1

W 1st. Stage Heat ●  

W2 Aux Heat 1st Stage for HP         ●

Y 1st Stage Compressor ● ●

O/B Reversing Valve Combined ● ●

G Fan Relay ● ●

R 24 VAC Hot (TH) ● ●

C 24 VAC Common (TR) Wire ● ●

L Diagnostics   ●

Note: * 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.

• 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”

2” Series Application Selection Switches

These switches are on the back of the thermostat and must be configured correctly for the application

1F80/1F86 1F82/1F89

Typical Single Stage Wiring

NOTE: The 2” Series uses a push in wire block, not screw terminals

Field Installed Jumper option to convert 1F80 and 1F89 to a single stage heat pump with no auxiliary heat

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

Time of Day

Heat/Cool/Off Button

Fan Auto/On or Run Sched Button

Battery Status = Full Charge = Half Capacity = Replace Batteries

Temperature or ConfigAdjustment Buttons

Actual Room Temperature

Desired Temperature

2” Series Entering System Configuration

Most technical service calls are the result of improper system configuration

1. System must be in OFF Mode

2. Press the Up and Down button simultaneously

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

CS(3) 1, 2, 3, 4, 5, 6 If CS selected On, selects Cool Savings value

3 E(On) OFF Select Energy Management Recovery

4 CR Heat(ME) FA, SL Select Adjustable Anticipation, Cycle Rate, Heat Single Stage

5 CR Cool(FA) SL Select Adjustable Anticipation, Cycle Rate, Cool Single Stage

6 CL(OFF) On Select Compressor Lockout OFF or On

7 L(On) Off Select Display Light On or OFF

8 Temp(0 HI)

4 LO to 4 HI Select temperature display adjustment higher or lower

9 F C Select F/C Display

10 Change Filter(OFF) On Select Filter replacement indicator OFF or On

Change Filter(200 h) 25 to 1975 If Change Filter selected On, selects time interval for Change Filter

Indicator (in 25 hour increments)11 Returns to normal operation

2” Series Configuration Record settings of key items for Homeowner Reference

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: 800-284-2824

1. TIME button.2. SYSTEM switch (COOL, OFF, HEAT, EMER)3. PRGM (program) button.4. FAN switch (ON, AUTO).5. RUN/HOLD (program) button.6. Raises temperature setting.7. Lowers temperature setting.

2” Thermostat Buttons and Switches

67

531

2 4

NOTE: TIME, PRGM and RUN/HOLD buttons not on non-programmable models.

2” Series Set Time and Day

Set Current Time and Day1. Press TIME button once. The display will

show the hour only2. 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 Program1. Move the SYSTEM switch to Heat or Cool2. 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.