Emerson 1F83H-21PR Instruction Manual

Emerson 1F83H-21PR Instruction Manual

Emerson 1F83H-21PR (Programmable) Installation and Operating Instructions

1F83H-21PR (Programmable) Installation and Operating Instructions 80 Series Heat Pump Thermostat Battery Powered or Hardwired with Common Emerson 1F83H-21PR is Single Stage Compressor, Heat Pump Systems (air source or geothermal) – 1 Stage Aux/Emergency Heat


Electrical Rating:
Battery Power....................... 20 to 30 VAC, NEC Class II, 50/60 Hz
Input-Hardwire....................... 20 to 30 VAC, NEC Class II, 50/60 Hz
Terminal Load........................1.5 A per terminal, 2.5A maximum all terminals combined
Setpoint Range......................45° to 99° F (7° to 37° C)
Rated Differentials (@ 6°F/ Hr): Fast Med Slow
Heat Pump (Heat)..................0.9°F 1.2°F 1.7°F
Heat Pump (Cool)..................0.9°F 1.2°F 1.7°F
Auxiliary Heat........................0.5°F 0.75°F 1.9°F
Operating Ambient.................32°F to +105°F (0° to +41°C)
Display Temperature Range....32°F to +99°F (0 to 37°C)
Operating Humidity................90% non-condensing maximum
Shipping Temperature Range..-20°F to + 150°F (-29° to +65°C)
Thermostat Dimensions......... 3-3/4” H x 6” W x 1-1/8” D


Emerson 1F83H-21PR WIRING

Refer to equipment manufacturer’s instructions for specific system wiring information. After wiring, see INSTALLER MENU for proper thermostat configuration. Wiring table shown are for typical systems and describe the thermostat terminal functions.

Terminal Designations

Terminal Function


Power (24V)


Changeover Terminal-Energized in Cool (O) or Heat (B) for Heat Pump or Damper Systems


Heat and Cool Mode 1st Stage Compressor


Fan Relay


Auxiliary only Heat Mode (Emergency Heat)


Common wire for 24V (optional with batteries)


Heat Pump malfunction / Diagnostic terminal (input signal requires common)


Heat Mode – 2nd stage

*Cut W2/E jumper when separate heat sources are used for W2 and E.
IMPORTANT: For Dual Fuel Heat Pump applications, be sure to turn on the Duel Fuel Logic option
(found in the Installer’s Menu)



  • Do not exceed the specification ratings.
  • All wiring must conform to local and national electrical codes and ordinances.
  • This control is a precision instrument, and should be handled carefully. Rough handing or distorting components could cause the control to malfunction.

Emerson 1F83H-21PR Battery Location

  1. W2/E Jumper Wire This thermostat electrically connect the W2 and E terminals so that you do not need to do this with a jumper wire. If your system has separate W2 and E wires, clip the W2/E jumper located on the back of the thermostat. This will isolate both terminals so they can be used independently.
  2. O/B Terminal Switch 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 heat pump being installed requires a B terminal to energize the changeover relay in Heat, the O/B switch must be moved to the B position. 


Before you begin using your thermostat, you should be familiar with its features, display and the location/operation of the thermostat buttons and switches.



1.) Fan Switch

10.) Thermostat is protecting the equipment from short cycling (5-minute delay)

2.) System Switch

11.) Indicates that the system is running in cool, heat or auxiliary mode (The auxiliary will run in Heat mode when the heat pump cannot maintain the set temperature.)

3.)  Backlight Button (located on the top of the thermostat

12.) Displays the current time

4.) Set Correct Time

13.) Battery status indicator

5.) Hold a Permanent Temperature

14.) Low battery indicator

6.)  Cancels Hold – Returns to Programmed Schedule

15.) Day of the week used when programming a schedule

7.) Raises Temperature Setting

16.) Permanent hold (bypassing the schedule)

8.) Access Menu Options

17.) Temperature setpoint

9.) Lowers Temperature Setting

18.) Appears when the keypad is locked (to prevent unwanted changes)


19.) Next (Menu button) is used to navigate within a menu


20.) Access the schedule and customize thermostat features


21.) Back (Run button) is used to navigate within a menu


22.) Exit (Hold button) returns to the home screen




Whenever “Battery level indicator low” appears in the display, new premium brand AA alkaline batteries should be installed. If the house will be unoccupied for an extended period and either “Battery Full ” or “ Battery low to replace” is displayed, install new batteries before leaving.


Set Current Time and Day

Note: Time icons will flash at initial power up or after a reset.

  1. Press Set Time
  2. Use UP or Down  to adjust the hour
  3. Press Next to advance to set the minutes and day of the week
  4. Press Exit when finished.

The default program is 5-1-1 Day, but can be setup as a 7-Day or Non-Programmable thermostat (refer to the User Menu above)

  • Hold Temperature (bypassing the schedule) – With the System Switch set to Heat or Cool, momentarily press the Hold button. Hold will be displayed. Use UP or Down to adjust the temperature. The thermostat will hold the room temperature at the selected setting until you press Run to start program operation again.
  • Program Override (Temporary Hold) – Press UP or Down until the desired temperature is displayed. The thermostat will override the schedule until the next programmed time period with a minimum override of 2 hours. Then the thermostat will automatically revert to the program.
  • Keypad Lockout – To prevent unwanted changes, the buttons can be disabled. To turn this feature On, press and hold UP and the Menu button until the icon appears (this can also be turned on in the menu). To turn Off, press and hold UP and the Menu button for 3 seconds.


Energy Saving Factory Schedule

This thermostat is programmed with the energy saving settings shown in the table below for all days of the week. 






Heating Schedule

6:00 AM - 70°F

8:00 AM - 62°F

5:00 PM - 70°F

10:00 PM - 62°F

Cooling Schedule

6:00 AM - 75°F

8:00 AM - 83°F

5:00 PM - 75°F

10:00 PM - 78°F

Note: Thermostat can be programmed on or off the subbase

Modify the Heating Schedule

  1. Slide the system switch to Heat
  2. Press Menu
  3. Press Next to enter the schedule
  4. The time icons will flash – use UP or Down to set the time for the start of a period
  5. Press Next – the set point icons will flash – use UP or Down to set the temperature for the current period
  6. Continue to press Next to advance through all periods (Wake, Leave, Return, Sleep) for all days of the week.

Note: Press Back to return to the previous setting. Once all days of the week have been programmed the thermostat will display End. Press Exit at any time to save changes and return to home screen.

Modify the Cooling Schedule

  1. Slide the system switch to Cool
  2. Repeat steps 2-6 from the heating schedule 



Possible Cause

Corrective Action

No Heat/

No Cool/

No Fan

(common problem)

  1. Blown fuse or tripped circuit breaker
  2. Furnace power switch to OFF
  3. Furnace blower compartment door panel loose or not properly installed
  4. Loose connection to thermostat or system
  1. Replace fuse or reset breaker
  2. Turn switch to ON
  3. Replace door panel in proper position to engage safety interlock or door switch
  4. Tighten Connections

No Heat

  1. System Switch not set to Heat
  2. Loose connection to thermostat or system
  3. Heating System requires service or thermostat requires replacement

Verify thermostat and system wires are securely attached.

Diagnostic: Set System Switch to Heat and raise the setpoint above room temperature. Within five minutes the thermostat should make a soft click sound and “Heat On” should appear on display. This sound indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed below. 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, contact the furnace manufacturer or a service person to verify the heating system is operating correctly.


Possible Cause

Corrective Action

No Cool

  1. System Switch not set to Cool
  2. Loose connection to thermostat or system
  3. Cooling System requires service or thermostat requires replacement

Verify thermostat and system wires are securely attached.

Diagnostic: Set System Switch to Cool and lower setpoint below room temperature. Same procedures 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 installer menu. (see INSTALLER MENU, item 50)

Heat, Cool or Fan Runs Constantly

Possible short in wiring, thermostat, heat, cool or fan system

Check each wire connection to verify they are not shorted or touching other wires. Try resetting the thermostat. If the condition persists contact your HVAC service person.


Display &



Thermostat display requires adjustment

Display can be adjusted +/-5°. See User Menu item 04

Furnace (Air


Cycles Too Fast or Slow (narrow or wide temperature swing)

The location of the thermostat and/ or the size of the Heating System may be influencing the cycle rate

Digital thermostats provide precise control and cycle faster than older mechanical models. The system turns on and off more frequently, but runs for a shorter time. If you would like to increase cycle time, choose SLO for slow cycle in the Installer menu. (Reference menu items 30 & 35) If an acceptable cycle rate is not achieved, contact your HVAC service person.

“Call for Service” icon appears on displayed

  1. Heating system is not able to heat the space to within 10 degrees of the setpoint within 2 hours
  2. Cooling system is not able to cool the space to within 10 degrees of the setpoint within 2 hours
  3. If “--” is displayed for the Room Temperature, a replacement thermostat is needed
  4. None of the buttons operate on the thermostat
  5. If “Call for Service” is flashing, compressor self diagnostic is detecting an issue with the

outdoor unit

  1. See corrective action for “No Heat”
  2. See corrective action for “No Cool”
  3. Replace thermostat
  4. Make sure keypad lockout is not turned on

(denoted by  icon)

  1. Contact a service person to verify the equipment is operating correctly

Resetting the Thermostat or Thermostat Settings

If the thermostat has good batteries, but has a blank display or does not respond to key presses, the thermostat should be reset by removing the batteries for 2 minutes. This reset will not change the menu settings or program. If the condition persists after reinstalling the batteries, replace the thermostat.
To conveniently reset only the schedule and user settings back to factory defaults, press Menu and Backlight buttons at the same time and hold until the display goes blank and resets.

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Title : Emerson 1F83H-21PR Instruction Manual
Format : PDF
Pages : 4 Pages
Language : English
File Size : 3 MB


Emerson 1F83H-21PR Manual 

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