Emerson 1F80-0471 Thermostat Operation Manual

The Emerson 1F80-0471 is a Blue 4-Inch programmable or non-programmable, single-stage thermostat designed for conventional gas, oil, electric, or heat pump systems without auxiliary heat. It features a large 4-inch backlit display, automatic heat/cool changeover, and flexible 5/1/1 or 5/2 day programming options. Below are the key specifications and operation instructions.

1. Key Specifications 2. Operation Instructions 2.1. Initial Setup 2.2. Setting the Clock and Day 2.3. Operating in Non-Programmable Mode 2.4. Operating in Programmable Mode 2.5. Advanced Features 2.6. Troubleshooting 3. Installation Instructions 3.1. Remove Old Thermostat 3.2. Installing New Thermostat 3.3. Battery Location 3.4. Wiring and Terminal Functions

Key Specifications

Type: Programmable (5/1/1 or 5/2 day) or non-programmable, single-stage thermostat
Compatibility:
- Conventional systems (gas, oil, electric, millivolt, 24V)
- Single-stage heat pump systems without auxiliary or emergency heat
- Heat only, cool only, or heat/cool systems
- Not compatible with multi-stage systems, electric baseboard heat, or systems exceeding 30 VAC
Power Source:
- Battery: mV to 30 VAC, 50/60 Hz or DC (2 AA alkaline batteries, Duracell or Energizer recommended)
- Hardwired: 20-30 VAC, NEC Class II, 50/60 Hz with common (C) wire
Electrical Rating:
- Terminal Load: 1.0 A per terminal, 1.5 A max combined
- Rated Differentials: Heat (0.6°F), Cool (1.2°F); Heat Pump: Heat (1.2°F), Cool (1.2°F)
- Setpoint Range: 45°F to 90°F (7°C to 32°C)
Display: 4-square-inch backlit LCD display with improved contrast
Operating Conditions:
- Ambient: 32°F to 105°F (0°C to 41°C)
- Humidity: 90% non-condensing max
- Shipping: -4°F to 150°F (-20°C to 65°C)
Dimensions: 3.4” H x 4.4” W x 1.3” D
Features:
- 5/1/1 day or 5/2 day programmable scheduling
- Automatic heat/cool changeover
- Energy-saving factory pre-programmed settings
- Compressor protection (up to 5-minute delay)
- Wall plate (F61-2634) to cover marks from previous thermostats
- Selectable Celsius or Fahrenheit display
- Cool Savings feature for energy efficiency during peak A/C demand
Thermostat Configuration Options:
- Conventional Gas, Oil, Electric (mV and 24V), Heat Only, Cool Only, or Heat/Cool Systems - Maximum Stages Heat/Cool: 1/1
- Single-Stage Heat Pump (Air Source or Geothermal) without Aux./Emergency Heat - Maximum Stages Heat/Cool: 1/1

Operation Instructions

Initial Setup

1. Insert Batteries: Install 2 AA alkaline batteries in the rear compartment by pulling the battery door down. Replace when “Change” or battery icon appears (approximately every 2 years). If less than two months of battery life remain, the setpoint may offset by 10°F (cooler in Heat mode, warmer in Cool mode); reset manually with up/down arrows.
2. Power On: If hardwired, ensure 20-30 VAC is supplied via the C terminal. The display should show the home screen with no battery icon if system-powered. If battery-powered, the battery icon indicates power level.
3. Configure System:

Locate the SS/HP switch on the back of the thermostat (default: SS for single-stage). Set to HP for heat pump systems.
Locate the O/B switch (default: O). Set to O for heat pumps energizing the changeover relay in COOL, or B for energizing in HEAT.
Access INSTALLER/CONFIGURATION MENU by pressing MENU for at least 5 seconds while in HEAT, COOL, or AUTO mode.
Configure options:
- Item 1: Select SS (single-stage) or HP (heat pump).
- Item 2: Select O or B for heat pump changeover valve (if HP selected).
- Item 3: Program options (P2: 5/2 day, P3: 5/1/1 day, P0: non-programmable).
- Item 5: Cool Savings (0 to 6, 0 to disable).
Exit by pressing RUN SCHED or waiting for the display to return to normal.

Setting the Clock and Day

1. Press MENU, then select SET TIME.
2. Use up/down arrows to adjust hours, minutes, and AM/PM.
3. Select SET DAY and adjust to the current day of the week.
4. Press RUN SCHED to save and exit.

Operating in Non-Programmable Mode

1. Select Mode: Press SYSTEM to choose HEAT, COOL, AUTO, or OFF.
2. Adjust Temperature: Press up/down arrows to set the desired temperature.
3. Fan Control: Press FAN to select AUTO (runs with heating/cooling) or ON (continuous).
4. Manual Operation: Press HOLD to maintain a constant temperature, bypassing the programmed schedule. Press RUN SCHED to resume programming. To reset programming and configuration, press up/down arrows and FAN simultaneously until the display blanks.

Operating in Programmable Mode

1. Factory Schedule: Pre-programmed with energy-saving settings (e.g., Heat: 70°F day, 62°F night; Cool: 78°F day, 82°F night). Press RUN SCHED to use defaults.
2. Custom Schedule:

Press MENU, then SET SCHEDULE, and select HEAT or COOL.
Choose 5/1/1 (Mon-Fri, Sat, Sun) or 5/2 (Mon-Fri, Sat-Sun) programming.
Set times/temperatures for Morning, Day, Evening, Night periods for each day/group.
Save by pressing RUN SCHED.

3. Temporary Override: Press up/down arrows to adjust temperature; it holds until the next programmed period.
4. Permanent Hold: Press HOLD and adjust temperature to maintain it until RUN SCHED is pressed.
5. Disable Programming: In INSTALLER/CONFIGURATION MENU, set Item 3 to P0 (non-programmable).

Advanced Features

1. Cool Savings: Enable in INSTALLER/CONFIGURATION MENU (Item 5) to adjust temperature during peak A/C demand for energy savings (0 to 6, higher values increase savings).
2. Compressor Protection: Automatically delays compressor restart (up to 5 minutes) to prevent damage, indicated by a flashing snowflake icon.
3. Filter Change Reminder: Alerts when filter replacement is needed; reset in INSTALLER/CONFIGURATION MENU.

Troubleshooting

No Display: Check battery polarity or replace with fresh AA alkaline batteries. Verify C wire connection for hardwired setups. Reset by pressing up/down arrows and FAN simultaneously until the display blanks. If the display remains blank or faded, clean battery contacts with a pencil eraser or check for corrosion.
No Heat/Cool: Ensure SYSTEM is set to HEAT/COOL, setpoint is above/below room temperature, and circuit breaker is on. Check for compressor delay (up to 5 minutes, indicated by flashing snowflake icon). Verify wiring and O/B switch for heat pumps. If no click is heard, check for a blown fuse or tripped breaker.
Fan Runs Continuously: Set FAN to AUTO. Ensure SYSTEM is not in AUTO mode if only heating or cooling is desired.
Inaccurate Temperature: Relocate thermostat away from drafts, heat sources, or exterior walls. Calibration is not available in this model.
“Change” or Battery Icon Persists: Replace batteries with fresh AA alkaline batteries. If the issue persists, clean battery contacts or reset the thermostat. If the display remains blank, the internal control board may be faulty.
Erratic Operation: A voltage spike or static discharge may cause issues. Reset by pressing up/down arrows and FAN together until the display blanks.

Installation Instructions

Warning: Thermostat installation and all components shall conform to Class II circuits per the NEC code. Do not use with line voltage systems; verify wiring with a qualified technician if unsure.

Remove Old Thermostat

Turn off power at the main fuse or circuit breaker until installation is complete to prevent electrical shock or equipment damage.
Remove the front cover of the old thermostat. With wires attached, remove the wall plate. If it has a mounting plate, remove the thermostat and plate as an assembly.
Mark wires for terminal identification using labels provided with the new thermostat.
Disconnect wires one at a time, ensuring they do not fall back into the wall.

Installing New Thermostat

Gently pull the thermostat cover off the base. Do not force or pry to avoid damage.
Place base over the hole in the wall and mark mounting hole locations using the base as a template.
Move base out of the way and drill mounting holes. Use plastic screw anchors if existing holes are too large.
Fasten base snugly to the wall using two mounting screws. Leveling is for appearance only and does not affect operation.
Connect wires to the terminal block using the appropriate wiring schematic (see Wiring section).
Push excess wire into the wall and plug the hole with fire-resistant material (e.g., fiberglass insulation) to prevent drafts.
Snap the thermostat onto the base carefully.

Battery Location

Includes 2 AA alkaline batteries with a battery tag to prevent power drainage. Remove the tag to engage batteries.
Replace batteries when “Change” appears or before leaving the home unoccupied for over 3 months. Use premium brand AA alkaline batteries (e.g., Duracell or Energizer).
Install batteries by pulling the battery door down, following the polarity indicated inside the compartment.

Wiring and Terminal Functions

Refer to the equipment manufacturer’s instructions for specific wiring. The following table describes typical terminal functions:

Terminal	Function
RC	Cooling power (24 VAC)
RH	Heating power (24 VAC)
C	Common wire for 24 VAC power from transformer
W	Heat relay
Y	Compressor contactor (cooling)
G	Fan relay
O/B	Heat pump changeover valve (O: cool, B: heat)

Note: For two-wire heat-only systems, connect one wire to RH and the other to W. For single-transformer systems, jumper RC and RH. For heat pumps, set O/B switch to “O” (cool) or “B” (heat) as required by the system. Do not exceed specified voltage ratings.