EMERSON 1F75H-21PR Programmable Thermostat-featured

EMERSON 1F75H-21PR Programmable Thermostat User Manual

Emerson logo

EMERSON 1F75H-21PR Programmable Thermostat 

Emerson-1F75H-21NP-Non-Programmable-Thermostat-PRODUCT

INDEX

Thermostat Installation 2-4
Wiring 2
Installer Menu 3-4
Test Equipment 4
Using the Thermostat 5-7
Thermostat Overview 5
Thermostat Operation 6
Thermostat Schedule/Programming 6-7
Troubleshooting 7-8
Homeowner Help Line 8
Thermostat Applications Maximum Stages Heat /Cool
Single Stage Compressor, Heat Pump Systems (air source or geothermal) – 1 Stage Aux/Emergency Heat 2/1

MERCURY NOTICE

This product does not contain mercury. However, this product may replace a product that contains mercury. Mercury and products containing mercury must not be discarded in household trash. Refer to www.thermostat-recycle.org for information on disposing of products containing mercury.

SPECIFICATIONS

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 for 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

THERMOSTAT INSTALLATION

WIRING
Refer to the 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
R Power (24V)
O/B Changeover Terminal-Energized in Cool (O) or Heat (B) for Heat Pump or Damper Systems
Y Heat and Cool Mode 1st Stage Compressor
G Fan Relay
E* Auxiliary-only Heat Mode (Emergency Heat)
C Common wire for 24V (optional with batteries)
W2* 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)Emerson-1F75H-21NP-Non-Programmable-Thermostat-fig-1

Precautions

  • 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 handling or distorting components could cause the control to malfunction.

WARNING

  • Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazards.
  • Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will burn out the thermostat and could cause personal injury and/or property damage.

CAUTION 
To prevent electrical shock and/or equipment damage, disconnect electrical power to the system, at the main fuse or circuit breaker box, until installation is complete.

Emerson-1F75H-21NP-Non-Programmable-Thermostat-fig-1

  1. W2/E Jumper Wire
    This thermostat electrically connects the W2 and E terminals so 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.

INSTALLER MENU

To access the INSTALLER’S MENU set the system switch to the OFF position and then press and hold the temperature Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-2 buttons for 3 seconds. The display will show item 30 in the table below. Use the temperature Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-2 buttons by pressing them simultaneously to navigate through menu items. Press Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-6orEmerson-1F75C-11NP-Non-Programmable-Thermostat-fig-7 to change a menu setting.

Installer’s Menu #(Hold Menu 3 Seconds) Description Default Setting(flashing icons) Settings(Press      or  )
30CR Heat Cycle Rate (how often the heat will turn on) MEd SLO – slow MEd – medium FAS – fast
32CR Aux Cycle Rate (how often the auxiliary heat will turn on) MEd SLO – slow MEd – medium FAS – fast
35CR Cool Cycle Rate (how often the cooling will turn on) MEd SLO – slow MEd – medium FAS – fast
50CL Compressor Lockout (protects the compressor from short cycling) OFF On – 5-minute delayOFF – no delay
60dF Duel Fuel Logic (turn On when using gas as the auxiliary heat source) OFF On-gas auxiliary heat OFF- electric auxiliary heat
65 Maximum Heat Limit(maximum set point for heat mode) 99 47 to 99
66 Minimum Cool Limit(minimum set point for cool mode) 45 45 to 97
(Installer Menu continued on next page)
Installer’s Menu #(Hold Menu 8 Seconds) Description Default Setting(flashing icons) Settings(Press  or)
79 Fahrenheit or Celsius °F °F – Fahrenheit°C – Celsius
81 Temperature Display Adjustment (adjust the displayed “Room Temperature”)  0  -5 to +5
83dL Continuous Display Light (keep the backlight always on – “C” wire required)  OFF On – always onOFF – momentarily

TEST EQUIPMENT

Turn on the power to the system.

Fan Operation
If your system does not have a G terminal connection, skip to Heating System.

  1. Move fan switch to On position. The blower should begin to operate.
  2. Move fan switch to Auto position. The blower should stop immediately.

Heating System

  1. Move System Switch to the Heat position.
  2. Press Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-6to adjust the thermostat setting to 1° above room temperature. The system should begin to operate and the thermostat will indicate Heat On.
  3. PressEmerson-1F75C-11NP-Non-Programmable-Thermostat-fig-7to adjust the thermostat setting 1° below room temperature. The heating system should stop operating and the thermostat should indicate Heat.

Cooling System

  1. Move System Switch to Cool position.
  2. Press Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-7to adjust the thermostat setting 1° below room temperature. The blower should come on immediately on high speed, followed by cold air circulation. The thermostat will indicate Cool On. There can be up to a 5 minute delay. (see INSTALLER MENU, item 50) 3.)
  3. Press Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-6to adjust the thermostat setting to 1° above room temperature. The cooling system should stop operating and the thermostat will indicate Cool.
    Note: If Starting Soon is shown on the display, the compressor lockout feature is operating. There will be up to a 5 minute delay before the compressor turns on.(see INSTALLER MENU, item 50)

CAUTION

  • To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.
  • Do not allow the compressor to run unless the compressor oil heaters have been operational for 6 hours and the system has not been operational for at least 5 minutes.

USING THE THERMOSTAT

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

THERMOSTAT BUTTONS AND SWITCHES THE DISPLAY
1.) Fan Switch 9.) Thermostat is protecting the equipment from short cycling (5-minute delay)
2.) System Switch 10.) 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.) Set Correct Time 11.) Displays the current time
4.) Hold a Permanent Temperature or Run Program 12.) Battery status indicator
5.) Access Programming 13.) Low battery indicator
6.) Raises Temperature Setting 14.) Day of the week used when programming a schedule
7.) Lowers Temperature Setting 15.) Permanent hold (bypassing the schedule)
8.) Access Menu Options 16.) Temperature setpoint
17.) Displays when the thermostat setpoint has reached the maximum or minimum setting.
18.) Displays change filter reminder
19.) SEE TROUBLESHOOTING

Emerson-1F75H-21NP-Non-Programmable-Thermostat-fig.

Whenever “ Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-9Replace ” 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 “Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-10” or “ Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-9 Replace ” is displayed, install new batteries before leaving.

THERMOSTAT OPERATION

Set Current Time and Day
Note: Time icons will flash at initial power up or after a reset.

  1. Press Set Time
  2. use or 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. A hold will be displayed. Use Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-6orEmerson-1F75C-11NP-Non-Programmable-Thermostat-fig-7  to adjust the temperature. The thermostat will hold the room temperature at the selected setting until you press Run to start the program operation again.
  • Program Override (Temporary Hold) – Press Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-6orEmerson-1F75C-11NP-Non-Programmable-Thermostat-fig-7 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.

THERMOSTAT SCHEDULE / PROGRAMMING

For tips on programming your thermostat to receive optimal comfort, convenience and energy savings go to: thermostathelper.com

Energy Saving Factory Schedule
This thermostat is programmed with the energy-saving settings shown in the table below for all days of the week.

Note: The thermostat can be programmed on or off the sub-base.

ENTERING YOUR PROGRAM

Set Current Time and Day

  1. Press TIME button once. The display will show the hour only.
    EXAMPLE:
  2. Press and hold either or 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.
    EXAMPLE:
  4. Press and hold either or until you reach the correct minutes.
  5. Press TIME once again. The display will show the day of the week.
  6. Press or 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.

Enter Heating Program

  1. Move the SYSTEM switch to HEAT.
  2. Press PRGM once. “Mo Tu We Th Fr” (indicating weekday program) will appear in the display. Also displayed are the currently programmed start time for the 1st heating period and the currently programmed temperature (flashing).
    This display window shows that for the 1st weekday period, the start time is 6:00 AM, and 70° is the programmed temperature (this example reflects factory preprogramming).
  3.  Press or to change the displayed temperature to your selected temperature for the 1st heating program period.
  4.  Press PROGRAM once (the programmed time will flash). Press or until your selected time appears. The time will change in 15 minute increments. When your selected time is displayed, press PROGRAM again to return to the change temperature mode.
  5. Press PROGRAM once. The currently programmed start time and setpoint temperature for the 2nd heating program period will appear.
  6. Repeat steps 3 and 4 to select the start time and heating temperature for the 2nd heating program period.
  7. Repeat steps 3 through 5 for the 3rd and 4th heating program periods.
  8. Press PROGRAM once. “SA” (indicating Saturday program) will appear in the display, along with the start time for the 1st heating period and the currently programmed temperature.
  9. Repeat steps 3 through 7 to complete Saturday heating programming.
  10. Press PROGRAM once to change to SU (Sunday) heating programming and repeat steps 3 through 7 to complete Sunday programming.
  11. When you have completed entering your heating program, press RUN/HOLD.

Enter Cooling Program

  1. Move SYSTEM switch to COOL position.
  2. Follow Enter Heating Program for entering your cooling program, using your selected cooling times and temperatures.

CAUTION!
If the outside temperature is below 50°F, disconnect power to the cooling system before programming. Energizing the air conditioner compressor during cold weather may cause personal injury or property damage.

TROUBLESHOOTING

Symptom 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.

Symptom 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.
Thermostat Display & Thermometer Disagree  

Thermostat display requires adjustment

 

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

04

 

Furnace (Air Conditioner) 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)

5.) 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. If the condition persists after reinstalling the batteries, replace the thermostat.
To conveniently reset only the user settings back to factory defaults, press the temperature Emerson-1F75C-11NP-Non-Programmable-Thermostat-fig-2 buttons and move the system switch from OFF to HEAT at the same time and hold until the display goes blank and resets.
WARNING: This product contains a chemical known to the state of California to cause cancer and birth defects and other reproductive harm.

HOMEOWNER HELPLINE: 1-800-284-2925
emerson.com/white-Rodgers
Emerson and White-Rodgers are trademarks of Emerson Electric Co. ©2021 Emerson Electric Co.
All rights reserved.

Reference

Download Manual:

EMERSON 1F75H-21PR Programmable Thermostat User Manual

Emerson logo

EMERSON 1F75H-21PR Programmable Thermostat User Manual

Comments

Leave a Reply

Your email address will not be published. Required fields are marked *