Emerson 1E78-144 Non-Programmable Touchscreen Thermostats User Guide

Emerson 1E78-144 Non-Programmable Touchscreen Thermostats

Mounting and Jumper Options

Feed wires through the back of the thermostat base and securely mount to the wall with supplied screws and anchors.

• Switch Electric/Gas Switch to ELEC for Heat Pump or electric heat application, leave in Gas for gas and oil applications.
• Clip jumper W903 (programmable models only) to disable Energy Management Recovery feature that starts heat or cool earlier than the program time.
• Clip jumper W904 for Celsius Display.
• Clip jumper W905 to produce a longer heating cycle which is normally for hot water or steam (Hydronic Systems).

CAUTION NOTICE! FREEZE HAZARD

• Replace batteries when “Change ” is displayed.
• “Change ” indicates batteries have limited remaining life.
• The system will not operate with dead batteries.

Wiring

Note: For 2 wire heat only systems connect to RH and W. Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat.

1. Raises temperature setting.
2. Lowers temperature setting.
3. *Time button.
4. PRGM (program) button.
5. *RUN (program) button. Press RUN to resume program.
6. *HOLD button. Press HOLD to bypass the program. Press RUN to resume program.
7. FAN switch (ON, AUTO).
8. SYSTEM switch (COOL, OFF, HEAT).
   * Programmable models only
9. Indicates day of the week.
10. firmly is displayed when the SYSTEM switch is in the HEAT position. is displayed (non-flashing) when the SYSTEM switch is in the COOL position. is displayed (flashing) when the compressor is in 5-minute lockout mode.
11. Alternately displays current time and temperature.
12. is displayed when the 2 “AAA” batteries are low and should be replaced. Nothing else will be displayed. Earlier models display “LO BATTERY”. Refer to 37-7006.
13. Displays current setpoint temperature (this is blank when SYSTEM switch is in the OFF position).
14. “HOLD” is displayed when HOLD is pressed to bypass the program.

Programming

Entering Your Program

Follow these steps to enter the heating and cooling programs you have selected.
Set Current Time and Day

1. Press TIME button once. The display will show the hour only
2. Press and hold either until you reach the correct hour and AM/PM designation (AM begins at midnight; PM begins at noon).
3. Press TIME once. The display window will show the minutes only.
4. Press and hold either until you reach the correct minutes.
5. Press TIME once. The display will show the day of the week.
6. Press until you reach the current day of the week.
7. Press RUN once. The display will show the correct time and room temperature alternately.

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 and the temperature (flashing) for the 1st heating period.
   This display window shows 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 to change the displayed temperature to your selected temperature for the 1st heating program period.
4. Press TIME once (the programmed time will flash). Press 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 programmed start time and setpoint temperature for the 2nd heating program period will appear.
6. Repeat steps 3 through 5 to select the start time and setpoint temperature for the 2nd heating program period.
7. Repeat steps 3 through 6 for the 3rd and 4th heating program periods. Weekday heating programs are now complete.
8. Press PRGM once. “SA SU” (indicating weekend program) will appear in the display, along with the start time for the 1st heating period and the programmed temperature (flashing).
9. Repeat steps 3 through 7 to complete weekend heating programming.
10. When you have completed entering your heating program, press RUN.

Enter Cooling Program

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.

1. Move SYSTEM switch to COOL position.
2. Follow the procedure for entering your heating program, using your selected cooling times and temperatures.

Display Light

• Programmable – Press the TIME and RUN buttons at the same time. The display will alternately show “d-L” and “OFF”. Press to change “OFF” to “ON”.
• Non-programmable – With SYSTEM switch in HEAT, press and at same time for two seconds. The display will alternately show “-L” and “FF” (off). Press to change “FF” to “ON”.

Check Your Programming

Follow these steps to check your thermostat programming one final time before beginning thermostat operation.

1. Move SYSTEM switch to HEAT position.
2. Press PRGM to view the 1st weekday heating period time and temperature. Each time you press PRGM, the next heating period time and temperature will be displayed in sequence for weekday, then weekend program periods (you may change any time or temperature during this procedure).
3. Press RUN.
4. Move SYSTEM switch to COOL position.
5. Repeat step 2 to check cooling temperatures.
6. Press RUN to begin program operation.
   YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED AND READY TO AUTOMATICALLY PROVIDE MAXIMUM COMFORT AND EFFICIENCY!

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White-Rodgers is a business of Emerson Electric Co.
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www.emersonclimate.com

References:

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Emerson 1E78-144 Non Programmable Touchscreen Thermostats User Guide

Emerson 1E78-144 Non-Programmable Touchscreen Thermostats User Guide