Emerson 1F80-0261 Thermostat Operation Manual

The Emerson 1F80-0261 is a Blue 2” 5+1+1 day programmable, single-stage thermostat designed for conventional gas, oil, electric, or heat pump systems without auxiliary heat. It features an easy-to-read backlit display, energy-saving programming, and precise temperature control. 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 day), single-stage thermostat
Compatibility:
- Conventional systems (gas, oil, electric, millivolt, 24V)
- Single-stage heat pump systems without auxiliary 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 (optional)
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: 2-square-inch backlit LCD display
Operating Conditions:
- Ambient: 32°F to 105°F (0°C to 41°C)
- Humidity: 90% non-condensing max
- Shipping: -40°F to 150°F (-40°C to 65°C)
Dimensions: 3-3/4” H x 4-3/4” W x 1-1/2” D
Features:
- 5+1+1 day programming (Mon-Fri, Sat, Sun)
- Energy Management Recovery (EMR) for early start
- Backlit display for low-light viewing
- Adjustable compressor protection (up to 5-minute delay)
- Filter change indicator
- Program settings retained during power failure
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. Heat - Maximum Stages Heat/Cool: 1/1

Operation Instructions

Initial Setup

1. Insert Batteries: Install 2 AA alkaline batteries in the rear compartment, removing the battery tag to activate. Replace when “Change” or battery icon appears (approximately every 2 years).
2. Power On: If hardwired, ensure 20-30 VAC is supplied via the C terminal. The display should show the home screen. If battery-powered, the thermostat operates without a C wire.
3. Configure System:

Locate the GAS/ELECTRIC switch on the back of the thermostat (default: GAS). Set to ELECTRIC for systems requiring the thermostat to control the fan during heating (e.g., electric heat or heat pumps).
Access CONFIGURATION MENU by setting SYSTEM to OFF, then pressing up/down arrows and TIME simultaneously for 5 seconds.
Configure options:
- Item 1: Select O (cool) or B (heat) for heat pump changeover valve.
- Item 3: Enable/disable EMR (Energy Management Recovery).
- Item 6: Compressor lockout (CL OFF or ON for 5-minute delay).
Exit by pressing RUN/HOLD or waiting for the display to return to normal.

Setting the Clock and Day

1. Press TIME button.
2. Use up/down arrows to adjust hours, minutes, and AM/PM.
3. Press TIME again to set the day of the week, using up/down arrows to select.
4. Press RUN/HOLD to save and exit.

Operating in Non-Programmable Mode

1. Select Mode: Press SYSTEM to choose HEAT, COOL, 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 RUN/HOLD to maintain a constant temperature, bypassing the programmed schedule. Press again to resume programming.

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/HOLD to use defaults.
2. Custom Schedule:

Press PRGM, then select HEAT or COOL.
Choose weekday (Mon-Fri), Saturday, or Sunday programming.
Set times/temperatures for Morning, Day, Evening, and Night periods using TIME and up/down arrows.
Save by pressing RUN/HOLD.

3. Temporary Override: Press up/down arrows to adjust temperature; it holds until the next programmed period.
4. Permanent Hold: Press RUN/HOLD and adjust temperature to maintain it until pressed again.
5. Disable Programming: In CONFIGURATION MENU, set programming to non-programmable mode if desired.

Advanced Features

1. Energy Management Recovery (EMR): When enabled (Item 3 in CONFIGURATION MENU), the thermostat starts heating/cooling early (15 minutes per 1°F) to reach the setpoint by the programmed time.
2. Compressor Protection: Enable CL ON (Item 6 in CONFIGURATION MENU) to delay compressor restart by 5 minutes to prevent damage.
3. Filter Change Reminder: Alerts when filter replacement is needed; reset in CONFIGURATION MENU.

Troubleshooting

No Display: Check battery polarity or replace batteries. Verify C wire connection for hardwired setups. Reset by pressing up/down arrows and TIME simultaneously. If the display remains blank, contact a professional technician.
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 flame/snowflake icon). Verify wiring and O/B switch for heat pumps. If no click is heard within 5 minutes, check for blown fuse, tripped breaker, or loose furnace panel.
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.
Flashing Flame/Snowflake Icon: Indicates normal operation (command sent to system for heating/cooling). If persistent without system response, verify wiring or contact a technician.
Battery Indicator Persists: Replace batteries with fresh AA alkaline batteries. If “Change” persists, clean battery contacts with a pencil eraser or reset the thermostat.

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.
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 along the top of the rear compartment, ensuring positive (+) ends are oriented correctly.

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 (optional)
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. The thermostat can operate on battery power if no C wire is available. Do not exceed specified voltage ratings.