White Rodgers 1F80-51 User Manual

Your new White Rodgers 5-Day/2-Day Digital Thermostat uses the technology of a solid-state microcomputer to provide precise time/temperature control. This thermostat offers you the flexibility to design heating and cooling programs that fit your needs. LCD continuously displays set point, and alternately displays time and room temperature. Temperature override until next program period. Manual program override (HOLD temperature). User may select either 12- or 24-hour clock display. °F/°C convertibility. Battery powered (3 “AA” Energizer® alkaline batteries included). Temperature range 45° to 90°F. Standard five terminals for single or two-transformer systems. Separate 5-day (weekday) and 2-day (weekend) programming. Simultaneous heat and cool program storage. Preprogrammed temperature control. B and O terminals for single stage heat pumps or damper operation. Four separate time/temperature settings per 24-hour period. Below are the key specifications, installation, operation, programming, and troubleshooting instructions.

Preparations

Assemble tools: screwdriver, wire stripper. FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.

• CAUTION: To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse or circuit breaker box until installation is complete. Do not exceed the specification ratings.
• WARNING: All wiring must conform to local and national electrical codes and ordinances. Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard. This control is a precision instrument, and should be handled carefully. Rough handling or distorting components could cause the control to malfunction. Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage thermostat and could cause personal injury and/or property damage.

This thermostat is intended for use with a low voltage system; do not use this thermostat with a line voltage system. If in doubt about whether your wiring is millivolt, line, or low voltage, have it inspected by a qualified heating and air conditioning contractor or electrician.

Thermostat Details

The thermostat consists of two parts: the thermostat cover and the base. To remove the cover, gently pull it straight out from the base. To replace the cover, line up the cover with the base and press gently until the cover snaps onto the base.

The Thermostat Buttons and Switches:

1. Up arrow: Raises temperature setting.
2. Down arrow: Lowers temperature setting.
3. SET TIME button.
4. VIEW PRGM (program) button.
5. RUN PRGM (program) button.
6. HOLD TEMP button.
7. FAN switch (ON, AUTO).
8. SYSTEM switch (COOL, OFF, HEAT).

The Display:

• Indicates day of the week.
• Flame icon displayed when the SYSTEM switch is in the HEAT position. Snowflake icon displayed (non-flashing) when the SYSTEM switch is in the COOL position. Snowflake displayed (flashing) when the compressor is in lockout mode.
• Displays “BATT” when the 3 “AA” batteries are low and should be replaced.
• Alternately displays current time and temperature.
• The word “HOLD” is displayed when the thermostat is in the HOLD mode.
• Displays currently programmed set temperature (this is blank when SYSTEM switch is in the OFF position).

Figure 11. Thermostat display, buttons, and switches

Diagram showing buttons labeled 1-8, including MO TU WE TH FR, AM, SA SU, HEAT, COOL, BATTERY, HOLD, VIEW PRGM, RUN PRGM, SET TIME, FAN ON AUTO, SYSTEM COOL OFF HEAT, and temperature arrows.

Removing Old Thermostat

Shut off electricity at the main fuse box until installation is complete. Ensure that the electrical power is disconnected. 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. Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat. Disconnect the wires from the old thermostat one at a time. DO NOT LET WIRES FALL BACK INTO THE WALL.

Mounting and Wiring

Remove the packing material from the thermostat. Gently pull the cover straight off the base. Forcing or prying on the thermostat will cause damage to the unit.

Wiring Diagrams

Figure 3. Typical wiring diagram for heating only, 2-wire, single transformer systems or millivolt systems

Diagram shows THERMOSTAT connected to SYSTEM with terminals Y, B, O, G, W, RC, RH. JUMPER WIRE between RC and RH. Connected to Heating System, Fan Relay, 24 VAC Transformer, 120 VAC Hot, Neutral or Thermopile. NOTE: RED jumper wire (provided with thermostat) must be connected between thermostat's RH and RC terminals for proper thermostat operation with this system.

Figure 4. Typical wiring diagram for 3-wire SERIES 10 heating systems

Diagram shows THERMOSTAT with terminals Y, B, O, G, W, RC, RH connected to SYSTEM. 3-wire Series 10 Primary Control (located at furnace) with R, W, B. Heating System, Cooling System Relay, System Fan. 24 VAC, 120 VAC Hot, Neutral. Furnace. Add jumper wire (not provided with thermostat) between R and B terminals on the primary control. NOTE: Jumper wire must be added between R and B terminals on the primary control (jumper wire not provided with thermostat).

Figure 5. Typical wiring diagram for heat only, 3-wire, single transformer systems

Diagram shows THERMOSTAT with terminals Y, B, O, G, W, RC, RH connected to SYSTEM. JUMPER WIRE and JUMPER WIRE. Heating System, Fan Relay. Hot, 24 VAC, 120 VAC Neutral. TRANSFORMER.

Figure 6. Typical wiring diagram for cool only, 3-wire, single transformer systems

Diagram shows THERMOSTAT with terminals Y, B, O, G, W, RC, RH connected to SYSTEM. JUMPER WIRE and JUMPER WIRE. Cooling System, Fan Relay. Hot, 24 VAC, 120 VAC Neutral. TRANSFORMER.

Figure 7. Typical wiring diagram for heat/cool, 4-wire, single transformer systems

Diagram shows THERMOSTAT connected to SYSTEM with terminals Y, B, O, G, W, RC, RH. JUMPER WIRE between RC and RH. Connected to Cooling System, Fan Relay, Heating System. 24 VAC Transformer, 120 VAC Hot, Neutral. NOTE: RED jumper wire (provided with thermostat) must be connected between thermostat's RH and RC terminals for proper thermostat operation with this system.

Figure 8. Typical wiring diagram for heat/cool, 5-wire, two-transformer systems

Diagram shows THERMOSTAT with terminals Y, B, O, G, W, RC, RH connected to SYSTEM. Heating System, Fan Relay, Cooling System Relay. HEATING TRANSFORMER (Hot, 24 VAC, 120 VAC Neutral, W), COOLING TRANSFORMER (Hot, 24 VAC, 120 VAC Neutral, R). Furnace.

Figure 9. Typical wiring diagram for heat pump with cool active reversing valve

Diagram shows THERMOSTAT with terminals Y, B, O, G, W, RC, RH connected to SYSTEM. Reversing Valve*, Compressor Contactor, Fan Relay. JUMPER WIRE between RC and RH. Hot, 24 VAC, 120 VAC Neutral. TRANSFORMER. *Reversing valve is energized when the system switch is in the COOL position. NOTE: RED jumper wire (provided with thermostat) must be connected between thermostat's RH and RC terminals for proper thermostat operation with this system.

Figure 10. Typical wiring diagram for heat pump with heat active reversing valve

Diagram shows THERMOSTAT with terminals Y, B, O, G, W, RC, RH connected to SYSTEM. Reversing Valve*, Compressor Contactor, Fan Relay. JUMPER WIRE and JUMPER WIRE. Hot, 24 VAC, 120 VAC Neutral. TRANSFORMER. *Reversing valve is energized when the system switch is in the HEAT position.

1. Connect wires beneath terminal screws on base using appropriate wiring schematic.
2. Place base over hole in wall and mark mounting hole locations on wall using base as a template.
3. Move base out of the way. Drill mounting holes.
4. Fasten base loosely to wall using two mounting screws. Adjust until level, and then tighten screws.
5. Push excess wire into wall and plug hole with a fire-resistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

Check Operation

NOTE: To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys. If at any time during testing your system does not operate properly, contact a qualified service person.

Fan Operation

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

1. Turn on the power to the system.
2. Move the FAN switch to ON position. The blower should begin to operate.
3. Move the FAN switch to the AUTO position. The blower should stop immediately.

Heating System

1. Move the SYSTEM switch to the HEAT position. If the heating system has a standing pilot, be sure to light it.
2. Press up arrow to adjust the thermostat setting above room temperature. The heating system should begin to operate.
3. Press down arrow to adjust the temperature setting below room temperature. The heating system should stop operating.

Cooling System

CAUTION: To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.

This thermostat has a built-in short-term (5-minute) time delay. This feature is activated after the compressor shuts down and the setpoint is changed within the 5-minute period. During this 5-minute period, COOL will flash on the display indicating that the thermostat has locked out the compressor to allow head pressure to stabilize. This thermostat does not sense AC power loss and therefore does not activate the short term compressor protection feature when power is restored.

1. Move the SYSTEM switch to the COOL position.
2. Press up arrow to adjust the thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation.
3. Press down arrow to adjust the temperature setting above room temperature. The cooling system should stop operating.

Operating Features

• SIMULTANEOUS HEATING/COOLING PROGRAM STORAGE: When programming, you can enter both your heating and cooling programs at the same time. There is no need to reprogram the thermostat at the beginning of each season.
• TEMPERATURE OVERRIDE: Press up or down arrow until the display shows the temperature you want. The thermostat will override current programming and keep the room temperature at the selected temperature until the next program period begins. Then the thermostat will automatically revert to the program.
• HOLD TEMPERATURE: The thermostat can hold any temperature within its range for an indefinite period, without reverting to the programmed temperature. Press HOLD TEMP button. HOLD will be displayed. Then choose the desired hold temperature by pressing up or down. The thermostat will hold the room temperature at the selected setting until you press RUN PRGM button to start program operation again.
• °F/°C CONVERTIBILITY: Press and hold SET TIME and HOLD TEMP buttons until the temperature display is in Celsius (°C). To display Fahrenheit (°F), repeat the process.
• 12-HOUR/24-HOUR CLOCK DISPLAY: The clock is set to display 12-hour time, which means that the clock will display AM and PM time (12:00 AM is midnight; 12:00 PM is noon). However, you may want to display a 24-hour clock (military-style time). The 24-hour clock display will show 1:00 PM as 13:00, 2:00 PM as 14:00, and so on. To change to the 24-hour clock display, press and hold SET TIME and RUN PRGM buttons at the same time. In the 24-hour clock mode, AM and PM are not displayed.
• LOW BATTERY INDICATOR: If the 3 “AA” alkaline batteries are low and should be replaced, the display will be blank except for the word BATTERY. When the batteries are low, pressing any button will cause the display to operate for ten seconds. After ten seconds, the display will be blank except for the word BATTERY. You cannot program with low batteries, but you can override setpoint temperature.
• TEMPERATURE DISPLAY ADJUSTMENT: Your new thermostat has been accurately set in our factory. However, if you wish, you may adjust your new thermostat temperature display to match your old thermostat. This can be accomplished (within a ±4°F range) as follows: 1. Press VIEW PRGM and HOLD TEMP buttons at the same time. 2. Press up or down to adjust the displayed temperature to your desired setting. 3. Press RUN PRGM to resume normal program operation.

Programming

This section will help you plan your thermostat’s program to meet your needs. For maximum comfort and efficiency, keep the following guidelines in mind when planning your program. When heating (cooling) your building, program the temperatures to be cooler (warmer) when the building is vacant or during periods of low activity. During early morning hours, the need for cooling is usually minimal.

Look at the factory preprogrammed times and temperatures shown below. If this program will suit your needs, simply press the RUN PRGM button to begin running the factory preset program.

Set Current Time and Day

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

Enter Heating Program

1. Move the SYSTEM switch to HEAT.
2. Press VIEW 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).
3. Press up or down to change the displayed temperature to your selected temperature for the 1st heating program period.
4. Press SET TIME once (the programmed time will flash). Press up or down until your selected time appears. The time will change in 15 minute increments. When your selected time is displayed, press SET TIME again to return to the change temperature mode.
5. Press VIEW PRGM once. The currently programmed start time and setpoint temperature for the 2nd heating program period will appear.
6. Repeat steps 4 and 5 to select the start time and heating temperature for the 2nd heating program period.
7. Repeat steps 4 through 6 for the 3rd and 4th heating program periods. Weekday heating programs are now complete.
8. Press VIEW PRGM once. “SA SU” (indicating weekend program) will appear in the display, along with the start time for the 1st heating period and the currently programmed temperature.
9. Repeat steps 4 through 8 to complete weekend heating programming.
10. When you have completed entering your heating program, press RUN PRGM.

Enter Cooling 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.

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

Check your programming

1. Move the SYSTEM switch to HEAT position.
2. Press VIEW PRGM to view the 1st weekday heating period time and temperature. Each time you press VIEW 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 PRGM.
4. Move SYSTEM switch to COOL position.
5. Repeat step 2 to check cooling temperatures.
6. Press RUN PRGM to begin program operation.

SAMPLE Heating/Cooling Schedule Plan (Factory Program)

Period	WEEKDAYS (5 Day) Start Time	WEEKDAYS Temp	WEEKEND (2 Day) Start Time	WEEKEND Temp
1ST	6:00 AM	70 F	6:00 AM	70 F
2ND	8:00 AM	62 F	8:00 AM	70 F
3RD	5:00 PM	70 F	5:00 PM	62 F
4TH	10:00 PM	62 F	10:00 PM	62 F

Specifications

• Electrical Rating: 8 to 30 VAC 50/60 Hz. or D.C.; 0.05 to 1.5 Amps (Load per terminal); 1.5 Amps Maximum Total Load (All terminals combined)
• Setpoint Temperature Range: 45°F to 90°F (7°C to 32°C)
• Operating Ambient Temperature Range: 32°F to 105°F
• Operating Humidity Range: 0 to 90% RH (non-condensing)
• Shipping Temperature Range: -40°F to 150°F

Troubleshooting

Symptom	Possible Cause	Corrective Action
No Heat/No Cool/No Fan (common problems)	1. Blown fuse or tripped circuit breaker. 2. Furnace power switch to OFF. 3. Furnace blower compartment door or panel loose or not properly installed.	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.
No Heat	1. Pilot light not lit. 2. Loose connection to thermostat or system. 3. Thermostat or heating system requires replacement or service. 4. SYSTEM Switch not set to HEAT.	1. Re-light pilot. 2. Verify thermostat and system wires are securely attached. 3. Your furnace manufacturer or service person can describe how to test the heating system to verify it is operating correctly. If the heating system is capable of operation and the no heat condition persists, replace the thermostat. 4. Set SYSTEM Switch to HEAT and raise temp above room temp.
No Cool	1. Loose connection to thermostat or system. 2. Thermostat or cooling system requires replacement or service. 3. SYSTEM Switch not set to COOL.	1. Verify thermostat and system wires are securely attached. 2. Your cooling system manufacturer or service person can describe how to test the cooling system to verify it is operating correctly. If the cooling system is capable of operation and the no cooling condition persists, replace the thermostat. 3. Set SYSTEM Switch to COOL and lower temp below room temp.
Heat, Cool or Fan Runs Constantly	1. Possible short in wiring. 2. Possible short in thermostat. 3. Possible short in heat/cool/fan system.	Check each wire connection to the thermostat to verify it is neatly looped under the terminals. No extra wire should stick out from under the terminals.
Furnace Cycles Too Fast or Too Slow (narrow or wide temperature swing)		The cycle rate is fixed. The location of the thermostat, size of the Heat/Cool System and current draw can influence the cycle rate. Contact a local service person for additional suggestions.
Cooling Cycles Too Fast or Too Slow (narrow or wide temperature swing)	1. Poor thermostat location for sensing room temperature. 2. Cooling system over or undersized. 3. Excessive Current draw influencing thermostat.	The cycle rate for cooling can not be adjusted. The location of the thermostat, size of the Cool system and current draw can influence the cycle rate. Contact a local service person for suggestions.
Thermostat Setting and Thermostat Thermometer Disagree	1. Thermostat thermometer setting requires adjustment.	The thermometer can be adjusted by using a standard slotted screwdriver. Turn the thermometer pointer screw located inside the front cover to change the setting. For calibrating the setting lever contact a local heating and cooling service person.
Blank Display and/or Keypad Not Responding	Battery or RC wire problem.	Replace batteries and check heat/cool system for proper operation. If a voltage spike occurs use the Reset Operation listed above.