Education
Central
Engage, Apply, Retain
Emerson 4” 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 4” Thermostats
Selecting the Right Thermostat for the Job
Model
Number
Applications
Programming Options
Power Source
✓
7+5+1+1, 5+2, Ø
4, Ø
B,H
1F85-0422
1/1 2/2 2/2 ✓
✓
✓
5+1+1, 5+2, Ø
4, Ø
B,H
1F80-0471
1/1
1/1 ✓
✓
✓
5+1+1, 5+2, Ø
4, Ø
B,H
1F83-0471
1/1 2/2 3/2 ✓
✓
✓
Ø
Ø
B,H
1F83-0422
1/1 2/2 2/2 ✓
✓
✓
Ø
Ø
B,H
1F86-0471
1/1
1/1 ✓
✓
✓
Ø
Ø
B,H
Humidity Control
✓
Heat Pump
1/1 2/2 3/2 ✓
Multi-Stage
1F85-0477
Single Stage
Millivolt Compatible
Single Stage (SS)
Multi-Stage (MS)
Heat Pump (HP1 or HP2)
Universal (All)
Stages
Heat / Cool by
System
3-Wire Zone Value
Model
Gas/Oil/Electric
Application Coverage by System
Program Hardwire
Program Days
Periods Battery or
per Week
per Day Power Assist
Universal
Single Stage / Heat Pump
Universal
Single Stage / Heat Pump
4” Series Thermostats Agenda
• Applications
• Wiring
• Configuration
• Programming
Featured Products In This Module
– 1F85-0477
• Multi Stage, Programmable
– 1F86-0471
• Single Stage/ Non-Programmable
Look at the Box for Detailed Information
Staging by System Type
Programming Options
Applications
Terminal Identification
Part Number
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
4” Series
Specification Sheets Contain Detailed Information
4” Series Applications
Application
Conventional or Heat Pump
with No Aux
Stages
Programming
Type
0
1F86-0471
5+1+1, 5+2, 0
1F80-0471
0
1F83-0422
5+1+1, 5+2, 0
1F85-0422
0
1F83-0471
7, 5+1+1, 5+2, 0
1F85-0477
1/1
2/2
Universal
3/2
4” Series Terminal Designations
4" Series
Terminal
Description
Programming
Stages
W
W/E
W2
Y
Y2
O/B
G
RH and RC
C
L
6
1st Stage Heat (SS1)
1st. Stage Heat (MS2)
or Aux Heat 1st Stage
(HP)
2nd Stage Heat (MS2)
or Aux Heat 2nd
Stage (HP2)
1st Stage Compressor
(SS, MS2 or HP)
2nd Stage
Compressor (MS2 or
HP2)
Reversing Valve
Combined
Fan Relay
24 VAC Hot (TH)
Separate
24 VAC Common
(TR) Wire
Diagnostics
Wet Heat 3 Wire
Zone Valve
Note:
Conventional
Universal
CONV or HP/No Aux *
Conventional or Heat Pump/With Aux
1F850422
1F83-0422 1F85-0477 1F83-0471
5+1+1.
7, 5+1+1,
0
0
5+2, 0
5+2, 0
2/2
3/2
1F80-0471
1F86-0471
5+1+1. 5+2, 0
0
1/1
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
* Requires Field Wiring from
Y to W for Heat Pump
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.
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
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
W
This
configuration
is designated
by #6
terminal on
other
thermostats
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
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
4” Series Navigation
Day of Week
Actual Room Temperature
Desired Temperature
Temperature or Config
Adjustment Buttons
Time of Day
Battery Status
= Full Charge
= Half Capacity
= Replace Batteries
Hold Button
Auto Sched Button
Heat/Cool/Off Fan Auto/On or
Button
Run Sched Button
Run, Schedule
or Menu Button
4” Series Entering System Configuration
Most technical
service calls are
the result of
improper system
configuration
1. System must be in HEAT or
A/C Mode
2. Press and hold the
MENU button for five
seconds
4” Series Configuration Menu
Denotes Critical to the Application
1F80 and 1F86 Single Stage
Menu
#
HP
1
1
2
2
3
3
SS
Displayed Press Δ or  to Select
(Default)
From Listed Options
Comments
(O) On
b On
1
P (2)
P 3, P 0
Selectable Programs Per Week
2
(OFF) CS
On CS
Select Cool Savings on or off
(3)
6, 5, 4, 2, 1
3
(On) E
(OFF) E
Selects Energy Management Recovery (EMR) on or off
5
4
FA, SL
Adjustable Anticipation Heat (SS/HP switch is at the SS position)
6
5
(ME) CR
Heat
(FA) CR
Cool
(FA) CR
Heat Pump
(OFF) CL
SL
Adjustable Anticipation Cool (SS/HP switch is at the SS position)
SL
Adjustable Anticipation (Heat Pump) (only when SS/HP switch is at
the HP position)
Compressor Lockout Time
Heat Cool Off,
Heat Off, Cool Off,
Auto Off
OFF L
4
4
7
5
8
6
6
9
7
7
Auto Heat
Cool Off
10
8
8
(On) L
11
9
9
0
12
10
10
F
13
11
11
(OFF)
Change
Filter
Change
Filter 200 h
14
12
12
On CL
Reversing Valve Output (SS/HP switch must be in HP position)
Selects Cool Savings value 1 (low) to 6 (high)
System Mode Configuration
Selects Display Light on or off
1 HI, 2 HI, 3 HI, 4 HI, Adjustable Ambient Temperature Display
1 LO, 2 LO, 3 LO, 4 LO
C
Selects Fahrenheit/Celsius Temperature Display
On Change Filter
Selects Filter Change-out Indicator
25 h to 1975 h in
25-hour increment
When on, selects time in 25 hour increments 25-hour increment
Returns to Normal Operation
4” Series Configuration Menu
Denotes Critical to the Application
1F83 and 1F85 Multi Stage or Heat Pump
Menu #
1F85
1F83
HP
MS/SS
Press Δ or 
to
Select From
Displayed
(Default) Listed Options
Comments
1
1
●
●
(OFF) Lk
L
2
2
●
●
(000) Lk
001 to 999
Selects Keypad lockout combination number
3
3
●
●
(MS 2)
HP 1, SS 1
4
4
●
(GAS)
ELE
Selects Multi-Stage (MS 2 No Heat Pump), Heat Pump 1 (HP 1,
1 compressor), or Single Stage (SS 1)
Select Gas or Electric heat
(ELE)
GAS
●
Selects Keypad Lockout.
5
5
●
●
(0) CS
1, 2, 4, 5, 6
6
—
●
●
(On) E
OFF
7
6
●
SL, FA
Adjustable Anticipation: Selects heating cycle rate for MS or SS
8
7
●
●
SL, FA
Adjustable Anticipation: Selects the cycle rate for cooling
9
8
●
●
SL, FA
Adjustable Anticipation Selects the cycle rate for Heat Pump
10
9
●
11
10
●
●
(ME) CR
Heat
(ME) CR
Cool
(ME)
CR Heat
Pump
(FA) CR
Emer
(OFF) CL
12
11
●
●
13
12
●
●
Heat-AutoCool-Off
(On) dL
SL
CL On
Selects Cool SavingsValue Value 0 Disables Feature
Selects Energy Management Recovery (EMR) On or OFF.
Selects the cycle rate for Emergency mode and
Auxiliary stage
Compressor Lockout Time
Auto-Off, Cool- Selects System Mode Configuration
Off, Heat-Off
dL OFF
Selects Display Light On or OFF
4” Series Configuration Menu
Denotes Critical to the Application
1F83 and 1F85 Multi Stage or Heat Pump
Menu #
HP
Press Δ or 
Displayed to Select From
(Default) Listed Options
1F85
1F83
14
13
●
●
0
15
14
●
●
°F
1 thru 4 HI,
1 thru 4 LO
°C
16
15
●
●
L (90) Heat
L 62 to L 89
Selects Limited HEAT Range
17
16
●
●
L (45) Cool
L 46 to L 82
Selects Limited COOL Range
18
—
●
●
P3
P0, P2
19
—
●
●
OFF
20
—
●
●
21
17
●
22
18
●
23
19
●
●
(On) AS
Heat
(On) AS
Cool
(On) FA
Heat
(On) FA
Cool
(OFF) CA
24
—
●
●
(On) dS
OFF
25
20
●
●
On
26
21
●
●
27
22
●
●
(OFF)
Change
Filter
(200 h)
Change
Filter
(o) On Cool
MS/SS
OFF
OFF
OFF
On
25-1975 h
(b) On Heat
Comments
Adjustable Ambient Temperature Display
Selects Fahrenheit/Celsius Temperature Display
Defaults for 5-1-1 programming (P3) but non- programmable
(PO) or 5-2 programming (P2) is available on most models.
Automatic Schedule for heat mode. 1F85 only.
NA to Cool only system.
Automatic Schedule for cool mode. 1F85 only.
NA to Heat only system.
Fast Heat option may be disabled by selecting OFF.
NA to SS config. NA to Cool only system.
Fast Cool option may be disabled by selecting OFF. NA to SS
config. NA to Heat only system.
Selects active Comfort Alert On or OFF.
Selects Automatic daylight Savings Time option
On or OFF. 1F85 only
Selects Filter Change-out Indicator On or OFF.
Change Filter time in 25 hour increments. This menu only
appears if On is selected in above.
Selects operation of the reversing valve terminal
(O/B) output as an O or B terminal.
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: 800-284-2824
4” Series Set Time, Year, Month and Date
1.
2.
3.
4.
5.
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
1.
2.
6.
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
Time
Menu/
Run
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
5+1+1, (3)
5+2 (2)
0 (0)
4
1F85
18
4” Series How To Set A Program
Press SYSTEM button to HEAT or COOL
1. Press the MENU button and then press
SCHEDULE
2. 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
3. Press UP/DOWN button to change the
temperature to your selected temperature
4. Press TIME button, time will flash
5. Press UP/DOWN button to adjust the start
time for the period
UP/
DOWN
1. The time will change in 15 minute increments
6. After you have set the time and the
temperature for the period, press
SCHEDULE to advance to the next program
period
7. Repeat steps 2 through 8 until all of the
program times and temperatures are set for
all program periods on that day
8. Press SCHEDULE to the next day and
repeat steps 2 through 9
9. Press Run to complete
System/
Time
Menu/
Schedule/
Run