Emerson White Rodgers 1F80-361

The White-Rodgers 1F80-361 is a programmable electronic digital thermostat that utilizes solid-state microcomputer technology for precise time/temperature control. It offers flexible programming options to suit individual heating and cooling needs. The thermostat supports separate 5-day (weekday), 1-day (Saturday), and 1-day (Sunday) programming, each with four distinct time/temperature periods per day. It can store both heating and cooling programs simultaneously, eliminating the need to reprogram at the start of each season. The device comes with preprogrammed temperature control and features a backlit LCD that continuously displays the setpoint and alternately shows the current time and room temperature.

Key operational features include:

Temperature Override: Allows temporary adjustment of the temperature until the next program period begins, after which it automatically reverts to the programmed schedule.
Manual Program Override (HOLD Temperature): Enables the thermostat to maintain a desired temperature indefinitely, overriding the programmed schedule until the RUN button is pressed again.
Temporary HOLD: Similar to temperature override, but the duration can be set from 0 to 8 hours in 15-minute increments. The "HOLD" indicator blinks to signify this mode.
Energy Management Recovery (EMR): This feature causes the thermostat to begin heating or cooling early to ensure the building temperature reaches the program setpoint at the specified time. For heating, it starts 5 minutes early for every 1°F of temperature required to reach the setpoint. Cooling allows more time per degree due to longer recovery times.
Compressor Lockout: An optional feature that causes the thermostat to wait 5 minutes before turning on the compressor if the system loses power or between cooling cycles. This protects the compressor from short cycling.
Filter Replacement Reminder: Displays "FLTR" after a set operating time (0 to 1950 hours in 50-hour increments) to remind users to change or clean the air filter. This timer can be reset.

Important Technical Specifications

Electrical Rating: 8 to 30 VAC, 50/60 Hz, or D.C.
Load per Terminal: 0.05 to 1.0 Amps
Maximum Total Load (All terminals combined): 1.5 Amps
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: -4°F to 149°F
Compatibility: Designed for standard heat/cool, heat only, electric heat, gas or oil fired, gas systems with intermittent ignition devices (I.I.D.) and/or vent dampers, hydronic (hot water or steam), single-stage heat pump systems (no auxiliary heat), and millivolt systems.
Incompatibility: Not for use with multi-stage systems, systems exceeding 30 VAC and 1.5 amps, or 3-wire zoned hydronic heating systems.
Power Source: Operates on 2 "AA" Energizer® alkaline batteries (included). The thermostat maintains program memory even without power/batteries, though the clock time will be incorrect.
Cycle Rate: Configurable as "Fast" (FA) for gas, oil, or electric heat (cycling just under 1°F) or "Slow" (SL) for hydronic systems (cycling at approximately 1.5°F). Both settings provide accurate temperature control.
Temperature Display Adjustment: Allows adjustment of the room temperature display by 4° higher or lower.
Temperature Readout: Switchable between Centigrade (°C) and Fahrenheit (°F).

Usage Features

User Interface: Features dedicated buttons for raising/lowering temperature settings, TIME, PRGM (program), RUN, HOLD, FAN switch (ON, AUTO), and SYSTEM switch (COOL, OFF, HEAT).
Backlit Display: The display backlight improves contrast in low lighting conditions. It can be set to ON (light stays on for a short period after any key press) or OFF (light stays off).
Configuration Menu: Accessible by pressing PRGM and RUN simultaneously, this menu allows users to customize various thermostat operating characteristics, including temporary hold time, heating cycle rate, backlight display, EMR, filter replacement run time, compressor lockout, temperature display adjustment, and F°/C° readout.
Programming: Users can plan their heating and cooling programs using a provided table, then enter the desired times and temperatures for weekday, Saturday, and Sunday periods. The thermostat allows independent programming for heating and cooling.
Fan Operation: The FAN switch allows users to select continuous fan operation (ON) or automatic operation with the heating/cooling system (AUTO).
System Operation: The SYSTEM switch allows users to select COOL, OFF, or HEAT modes.
Reset Function: In case of a voltage spike or static discharge causing erratic operation, the thermostat can be reset by pressing the and TIME buttons simultaneously. This also resets factory defaults in the configuration menu.

Maintenance Features

Battery Replacement: The thermostat uses 2 "AA" alkaline batteries. A "BATT" indicator on the display signals low battery power, prompting replacement with fresh "AA" Energizer® alkaline batteries. Batteries should be replaced annually for optimum performance. The batteries are installed along the top of the base, with the positive (+) end to the left.
Filter Reminder: The "FLTR" display serves as a reminder to change or clean the air filter after a user-defined operating period.
Troubleshooting Guide: The manual includes a comprehensive troubleshooting section that lists common symptoms, possible causes (e.g., blown fuse, furnace power switch off, loose connections, pilot light not lit, system switch not set correctly, furnace lock-out, shorted wiring, low batteries), and corrective actions.
Installation Precautions: Emphasizes disconnecting electrical power before installation, proper wiring according to local and national electrical codes, and careful handling to prevent damage. It also provides guidance on handling mercury if replacing an older thermostat containing it.