White Rodgers 1E78 5 2 Day Programmable Thermostat Instruction Manual

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3

4

5

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CONTENTS  

Preparations .................................................. 1  

Thermostat Details ........................................ 1  

Removing Old Thermostat............................. 1  

Mounting and Wiring...................................... 2  

Check Thermostat Operation......................... 3  

Programming your Thermostat...................... 4  

Specifications ................................................ 6  

Troubleshooting ............................................. 6  

Installation Instructions for  

Heating & Air Conditioning  

1E78  

5/2 Day Programmable Thermostat  

YOUR THERMOSTAT REPLACES  

Typical System Compatibility Chart  

PREPARATIONS  

1

1E78  

Yes  

Yes  

Yes  

Yes  

Yes  

Yes  

Yes  

Yes  

Yes  

No  

Standard Heat Only Two Wire Gas or Oil Fired Systems (24 volt)  

Electronic Ignition Heat Only Two Wire Systems (24 volt)  

Electronic Ignition Heat Only Gas or Oil Fired Systems (24 volt)  

Standard Heat/Cool Systems (24 volt)  

Assemble tools required as shown below.  

FLAT BLADE SCREWDRIVER  

Heat/Cool Systems Electric Heat (24 volt)  

Heat Only Electric Heat Systems (24 volt)  

Cool Only Systems (24 volt)  

HAND OR POWER  

DRILL WITH 3/16 INCH  

DRILL BIT, IF NEEDED  

Heat Pump Systems (No Aux. or Emergency Heat)  

Hot Water Zone Heat Only (Two Wire) Systems  

Hot Water Zone Heat Only (Three Wire) Systems  

Line Voltage Heating or Baseboard 110/240 Volt Systems  

Millivolt Systems Floor or Wall Furnaces  

12 VDC Mobile Home Application  

WIRE CUTTER/STRIPPER  

No  

Yes  

Yes  

No  

Failure to follow and read all instructions carefully  

before installing or operating this control could cause  

personal injury and/or property damage  

Multistage Systems  

Systems Exceeding 30VAC, 1.5 Amp  

No  

THERMOSTAT DETAILS  

REMOVING OLD THERMOSTAT  

2

3

Mounting  

Hole  

CAUTION  

!

To prevent electrical shock and/or equipment damage,  

disconnect electrical power to the system at the main fuse  

or circuit breaker until installation is complete.  

Beforeremovingwiresfromoldthermostat’sswitchingsubbase, label  

each wire with the terminal designation it was removed from.  

W903  

W904  

RC  

Y

G

O

RH  

B

W

1. Remove Old Thermostat: A standard heat/cool thermostat  

consists of three basic parts:  

W905  

a. The cover, which may be either a snap-on or hinge type.  

b. The base, which is removed by loosening all captive screws.  

c. The switching subbase, which is removed by unscrewing  

the mounting screws that hold it on the wall or adaptor plate.  

ELEC GAS  

2. Shut off electricity at the main fuse box until installation is com-  

plete. Ensure that electrical power is disconnected.  

Elec/Gas  

Switch  

Back of  

Thermostat Body  

Mounting  

Hole  

Base  

3. Remove the front cover of the old thermostat. With wires still  

attached, remove wall plate from the wall. If the old thermostat  

has a wall mounting plate, remove the thermostat and the wall  

mounting plate as an assembly.  

W903 - clip to disable EMR feature  

W904 - clip for Celcius display  

W905 - clip for hydronic system  

4. Identify each wire attached to the old thermostat.  

NOTE: Earlier models refer to 37-7006 for jumper locations.  

5. Disconnect the wires from the old thermostat one at a time. DO  

NOT LET WIRES FALL BACK INTO THE WALL.  

Figure 1.Thermostat  

6. Install new thermostat using the following procedures.  

PART NO. 37-6542C  

Replaces 37-6542B  

1026  

www.white-rodgers.com  

www.emersonclimate.com  

https://manual-hub.com/  

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General	Details
Name	White Rodgers 1E78 5 2 Day Programmable Thermostat Instruction Manual
Make	WHITE RODGERS
Language	English
Filetype	PDF (Download)
File size	0.3 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• WHITE RODGERS

White Rodgers 1E78 5 2 Day Programmable Thermostat Instruction Manual Overview

Summary of Contents

• Page 1: Preparations Assemble tools required as shown below. Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury and/or property damage. Thermostat details Removing old thermostat To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker until installation is complete. Remove old thermostat: A standard heat/cool thermostat consists of three basic parts: the cover, the base, and the switching subbase. Shut off electricity at the main fuse box until installation is complete. Identify each wire attached to the old thermostat. Disconnect the wires from the old thermostat one at a time. Do not let wires fall back into the wall.
• Page 2: Caution: Take care when securing and routing wires to avoid shorting to adjacent terminals or the rear of the thermostat. Removing old thermostat: This product does not contain mercury, but may replace a unit that does. Do not open mercury cells. Terminal cross reference chart: Includes designations for new thermostat and other manufacturers. Warning: Do not use on circuits exceeding specified voltage to avoid damage and hazards. Energy Management Recovery (EMR): The thermostat starts the heating or cooling system early to reach the setpoint on time. Attach thermostat base to wall: Remove packing material and gently pull the thermostat body off the base. Connect wires beneath terminal screws using the appropriate wiring schematic. Fasten the base loosely to the wall, level it, and then tighten screws. Push excess wire into the wall and plug the hole with fire-resistant material to prevent drafts. Battery location: The thermostat requires 2 “AAA” alkaline batteries for operation.
• Page 3: Mounting and wiring Typical wiring diagram for heat only, 3-wire, single transformer systems Typical wiring diagram for heat/cool, 5-wire, two-transformer systems Typical wiring diagram for cool only, 3-wire, single transformer systems Typical wiring diagram for heat pump with reversing valve energized in COOL Typical wiring diagram for heat pump with reversing valve energized in HEAT This thermostat has a time delay between cooling cycles to allow the head pressure in the compressor to stabilize. To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys. Move SYSTEM switch to COOL position. Move FAN switch to ON position. The blower should begin to operate. To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.
• Page 4: Check thermostat operation Before you begin programming your thermostat, you should be familiar with its features and the display and operation of the thermostat buttons. Your thermostat consists of two parts: the thermostat body and the base. To remove the body, gently pull it straight out from the base. To replace the body, line up the body with the base and press gently until it snaps onto the base. The thermostat buttons and switches include the up arrow, down arrow, TIME button, PRGM button, RUN button, HOLD button, FAN switch, and SYSTEM switch. The display indicates the day of the week and alternately displays current time and temperature. Energy management recovery causes the thermostat to start heating or cooling early to reach the program setpoint at the specified time. When the batteries are low, the display will indicate this condition. The thermostat can hold any temperature within its range for an indefinite period without reverting to the programmed temperature. You can enter both heating and cooling programs at the same time. The factory default setting is Fahrenheit, but it can be altered to Celsius. The thermostat allows for temperature override and adjustment of the temperature display to match an old thermostat.
• Page 5: Press PRGM and RUN buttons at the same time. Press or to adjust the displayed temperature to your desired setting. Follow these steps to enter the heating and cooling programs you have selected. Press RUN to resume normal program operation. The display backlight improves display contrast in low lighting conditions. This section will help you plan your thermostat’s program to meet your needs. When heating your building, program the temperatures to be cooler when the building is vacant. You must program four periods for both the weekday and weekend program. You can choose start times, heating temperatures, and cooling temperatures independently for both weekday and weekend programs. Use the table at the bottom of the page to plan your program time periods and the temperatures you want during each period.
• Page 6: Check your programming. Repeat steps to select the start time and heating temperature for the 2nd heating program period. Follow these steps to check your thermostat programming one final time before beginning thermostat operation. Move SYSTEM switch to HEAT position. Press PRGM once to view weekend program. Repeat steps to complete weekend heating programming. When you have completed entering your heating program, press RUN. If the outside temperature is below 50°F, disconnect power to the cooling system before programming. Setpoint temperature range is 45°F to 90°F (7°C to 32°C). For optimum performance, we recommend replacing batteries once a year with fresh “AAA” alkaline batteries.
• Page 7: Troubleshooting No Heat - Heating system requires service or thermostat requires replacement. - Set SYSTEM Switch to HEAT and raise the setpoint above room temperature. - If the thermostat does not click, try the reset operation. No Cool - SYSTEM Switch not set to COOL. - Verify thermostat and system wires are securely attached. - Cooling system requires service or thermostat requires replacement. Heat, Cool or Fan Runs Constantly - Possible short in wiring. - Check each wire connection to verify they are not shorted or touching together. - Try resetting the thermostat. Furnace Cycles Too Fast or Too Slow - The location of the thermostat and/or the size of the Heating System may be influencing the cycle rate. - Digital thermostats may cycle faster than older mechanical models. - Contact a local service person for additional suggestions if an acceptable cycle rate is not achieved. Cooling Cycles Too Fast or Too Slow - The cycle rate for cooling is fixed and cannot be adjusted. - Contact a local service person for suggestions. Thermostat Setting and Thermostat Thermometer Disagree - Thermostat thermometer setting requires adjustment. - The thermometer can be adjusted +/- 3 degrees. Thermostat Does Not Follow Program - AM or PM set incorrectly in program or on the clock. - Check current clock and program settings. Blank Display and/or Keypad Not Responding - Voltage spike or static discharge may have occurred. - Battery change required.
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