1. Homeowner Support Hotline:
Education
Central
Engage, Apply, Retain
Emerson 4” Series
Thermostats
Homeowner Support Hotline:
Note: This module covers common elements. Refer to Specification Sheet or Installation Instructions for detailed information.

2. Emerson 4” Thermostats Selecting the Right Thermostat for the Job
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 Number
Single Stage
Multi-Stage
Heat Pump
Gas/Oil/Electric
3-Wire Zone Value
Millivolt Compatible
Humidity Control
Program Days per Week
Program Periods per Day
Hardwire Battery or Power Assist
Universal 1F
1/1
2/2
3/2 ✓
, 5+2, Ø
4, Ø
B,H 1F
5+1+1, 5+2, Ø
Single Stage / Heat Pump 1F 1F Ø 1F 1F

3. 4” Series Thermostats Agenda
Applications
Wiring
Configuration
Programming
Featured Products In This Module 1F
Multi Stage, Programmable 1F
Single Stage/ Non-Programmable

4. Look at the Box for Detailed Information
Staging by System Type
Programming Options
Applications
Part Number
Terminal Identification

5. 4” Series Thermostat Overview
Single Stage or Universal 2 Heat/2 Cool
Easy-to-Read 4-Square-Inch Blue Display
Comfort Alert™ Compressor Protection
Keypad lockout
Adjustable Setpoint Temperature Limits
Battery Power Monitor
Choice of Programmable or Non-Programmable
+/-1 Degree Accuracy- For Optimum Comfort and Equipment Life

6. 4” Series Specification Sheets Contain Detailed Information

7. Conventional or Heat Pump with No Aux
4” Series Applications
Application
Stages
Programming
Type
Conventional or Heat Pump with No Aux
1/1 1F
5+1+1, 5+2, 0 1F
Universal
2/2 1F 1F
3/2 1F
7, 5+1+1, 5+2, 0 1F

8. Conventional or Heat Pump/With Aux
4” Series Terminal Designations
4" Series
Conventional
Universal
CONV or HP/No Aux *
Conventional or Heat Pump/With Aux
Terminal
Description 1F 1F 1F 1F 1F 1F
Programming
, 0
7, 5+1+1, 5+2, 0
Stages
1/1
2/2
3/2 W
1st Stage Heat (SS1) ●
W/E
1st. Stage Heat (MS2) or Aux Heat 1st Stage (HP) W2
2nd Stage Heat (MS2) or Aux Heat 2nd Stage (HP2) Y
1st Stage Compressor (SS, MS2 or HP) Y2
2nd Stage Compressor (MS2 or HP2)
O/B
Reversing Valve Combined G
Fan Relay
RH and RC
24 VAC Hot (TH) Separate C
24 VAC Common (TR) Wire L
Diagnostics 6
Wet Heat 3 Wire Zone Valve
Note:
* Requires Field Wiring from Y to W for Heat Pump

9. 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.

10. 4” Series Application Selection Switches
SS/HP Switch Gas or Heat Pump Applications
Gas or Electric furnace applications  W terminal is Heat
Ensure SS/HP switch is in the SS position
Single Stage Heat Pumps (no auxiliary heat)  O/B terminal is Heat
Ensure SS/HP switch is in the HP position
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.
SS/HP switch
These switches are on the back of the thermostat and must be configured correctly for the application
GAS/ELEC switch

11. 4” Series Wiring Hydronic
Hydronic Applications
W terminal opens the hydronic valve identified as 4 on the valve
O/B terminal closes the hydronic valve identified as 6 on the valve
RH terminal is the hot side of the 24 VAC identified as 5 on the valve
Ensure SS/HP switch is in the SS position
This configuration is designated by #6 terminal on other thermostats W W

12. 4” Series Wiring Gas Gas Applications
For Single Stage wire the red terminals
For Multi-Stage wire the same, but add the second stage (green Y2 and W2) Ensure MS2 is selected in the configuration menu

13. 4” Series Wiring Heat Pump
Heat Pump Applications
For Single Stage heat pumps where Y terminal is 1st stage compressor and W/E terminal is first stage aux heat, W2 is second stage aux heat.
Ensure HP1 is selected in the configuration menu
If you only have one wire for aux/emergency heat install jumper W/E W2

14. 4” Series Navigation Day of Week Time of Day Heat/Cool/Off Button
Fan Auto/On or
Run Sched Button
Run, Schedule
or Menu Button
Hold Button
Auto Sched Button
Battery Status
= Full Charge
= Half Capacity
= Replace Batteries
Temperature or Config
Adjustment Buttons
Actual Room Temperature
Desired Temperature

15. 4” Series Entering System Configuration
Most technical service calls are the result of improper system configuration
2. Press and hold the MENU button for five seconds
1. System must be in HEAT or A/C Mode

16. Press Δ or  to Select From Listed Options
4” Series Configuration Menu Denotes Critical to the Application
1F80 and 1F86 Single Stage
Menu # HP SS
Displayed (Default)
Press Δ or  to Select From Listed Options
Comments 1
(O) On
b On
Reversing Valve Output (SS/HP switch must be in HP position) 2
P (2)
P 3, P 0
Selectable Programs Per Week 3
(OFF) CS
On CS
Select Cool Savings on or off
(3)
6, 5, 4, 2, 1
Selects Cool Savings value 1 (low) to 6 (high) 4
(On) E
(OFF) E
Selects Energy Management Recovery (EMR) on or off 5
(ME) CR Heat
FA, SL
Adjustable Anticipation Heat (SS/HP switch is at the SS position) 6
(FA) CR Cool SL
Adjustable Anticipation Cool (SS/HP switch is at the SS position) 7
(FA) CR Heat Pump
Adjustable Anticipation (Heat Pump) (only when SS/HP switch is at the HP position) 8
(OFF) CL
On CL
Compressor Lockout Time 9
Auto Heat Cool Off
Heat Cool Off, Heat Off, Cool Off, Auto Off
System Mode Configuration 10
(On) L
OFF L
Selects Display Light on or off 11
1 HI, 2 HI, 3 HI, 4 HI, 1 LO, 2 LO, 3 LO, 4 LO
Adjustable Ambient Temperature Display 12 F C
Selects Fahrenheit/Celsius Temperature Display 13
(OFF) Change Filter
On Change Filter
Selects Filter Change-out Indicator
Change Filter 200 h
25 h to 1975 h in 25-hour increment
When on, selects time in 25 hour increments 25-hour increment 14
Returns to Normal Operation

17. Press Δ or  to Select From Listed Options
4” Series Configuration Menu Denotes Critical to the Application
1F83 and 1F85 Multi Stage or Heat Pump
Menu #
MS/SS
Displayed
(Default)
Press Δ or  to Select From Listed Options
Comments
1F85
1F83 HP 1 ●
(OFF) Lk L
Selects Keypad Lockout. 2
(000) Lk
001 to 999
Selects Keypad lockout combination number 3
(MS 2)
HP 1, SS 1
Selects Multi-Stage (MS 2 No Heat Pump), Heat Pump 1 (HP 1, 1 compressor), or Single Stage (SS 1) 4
(GAS)
ELE
Select Gas or Electric heat
(ELE)
GAS 5
(0) CS
1, 2, 4, 5, 6
Selects Cool SavingsValue Value 0 Disables Feature 6 —
(On) E
OFF
Selects Energy Management Recovery (EMR) On or OFF. 7
(ME) CR Heat
SL, FA
Adjustable Anticipation: Selects heating cycle rate for MS or SS 8
(ME) CR Cool
Adjustable Anticipation: Selects the cycle rate for cooling 9
(ME) CR Heat Pump
Adjustable Anticipation Selects the cycle rate for Heat Pump 10
(FA) CR Emer SL
Selects the cycle rate for Emergency mode and Auxiliary stage 11
(OFF) CL
CL On
Compressor Lockout Time 12
Heat-Auto-Cool-Off
Auto-Off, Cool-Off, Heat-Off
Selects System Mode Configuration 13
(On) dL
dL OFF
Selects Display Light On or OFF

18. Press Δ or  to Select From Listed Options
4” Series Configuration Menu Denotes Critical to the Application
1F83 and 1F85 Multi Stage or Heat Pump
Menu #
MS/SS
Displayed
(Default)
Press Δ or  to Select From Listed Options
Comments
1F85
1F83 HP 14 13 ●
1 thru 4 HI,
1 thru 4 LO
Adjustable Ambient Temperature Display 15 °F °C
Selects Fahrenheit/Celsius Temperature Display 16
L (90) Heat
L 62 to L 89
Selects Limited HEAT Range 17
L (45) Cool
L 46 to L 82
Selects Limited COOL Range 18 — P3
P0, P2
Defaults for programming (P3) but non- programmable (PO) or 5-2 programming (P2) is available on most models. 19
(On) AS Heat
OFF
Automatic Schedule for heat mode. 1F85 only. NA to Cool only system. 20
(On) AS Cool
Automatic Schedule for cool mode. 1F85 only. NA to Heat only system. 21
(On) FA Heat
Fast Heat option may be disabled by selecting OFF. NA to SS config. NA to Cool only system. 22
(On) FA Cool
Fast Cool option may be disabled by selecting OFF. NA to SS config. NA to Heat only system. 23
(OFF) CA On
Selects active Comfort Alert On or OFF. 24
(On) dS
Selects Automatic daylight Savings Time option On or OFF. 1F85 only 25
(OFF) Change Filter
Selects Filter Change-out Indicator On or OFF. 26
(200 h) Change Filter h
Change Filter time in 25 hour increments. This menu only appears if On is selected in above. 27
(o) On Cool
(b) On Heat
Selects operation of the reversing valve terminal (O/B) output as an O or B terminal.

19. 4” 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:
4” Series Programming Worksheet

20. 4” Series Set Time, Year, Month and Date
Press MENU and then TIME button once. The display will show the hour only.
Press and hold either the UP/DOWN button until you reach the correct hour and the AM/PM designation
Press Time button once. The display will show the minutes only.
Press and hold either the UP/DOWN button until you reach the correct minutes
Press TIME again
401 will show the day of the week. Press the UP/DOWN button to change the display to the correct setting.
402 additional presses of TIME will advance the display to show the year, month and date of month. Press the UP/DOWN button to correct settings for each.
Press Run to exit the Time mode.
UP/
DOWN
Menu/Run
Time

21. 4” Configure Program Options
System must be set for Heat or Cool. Press the Menu button for at least 5 seconds.
The display will display step #1 in the configuration menu
Press the UP button to the configuration Menu No
Select the programs per week by pressing UP/DOWN button
“0” for non-programmable
“2” for a 5+2
“3” for 5+1+1
Note: Thermostat defaults to 4 programs per day
Press the Run button
Model Number
Configuration Menu No.
Programs per week
Programs per day
1F80 02
5+1+1 (3)
5+2 (2)
0 (0) 4
1F85 18
5+1+1, (3)

22. 4” Series How To Set A Program
Press SYSTEM button to HEAT or COOL
Press the MENU button and then press SCHEDULE
The top of the display will show the day(s) being programmed. The time and temperature (flashing) are also display. “1” will also be display to indicate the period
Press UP/DOWN button to change the temperature to your selected temperature
Press TIME button, time will flash
Press UP/DOWN button to adjust the start time for the period
The time will change in 15 minute increments
After you have set the time and the temperature for the period, press SCHEDULE to advance to the next program period
Repeat steps 2 through 8 until all of the program times and temperatures are set for all program periods on that day
Press SCHEDULE to the next day and repeat steps 2 through 9
Press Run to complete
UP/
DOWN
System/Time
Menu/
Schedule/
Run