Emerson 1F87-361/325 Thermostat Operation Manual

The Emerson 1F87-361 (also referred to as 1F87-361/325 in some contexts) is a Classic 80 Series 7-day programmable thermostat designed for single-stage heating and cooling systems. It features a backlit display, precise temperature control, and flexible 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 (7-day), single-stage thermostat
Compatibility:
- Single-stage systems (gas, oil, electric)
- Millivolt heat-only systems
- Hydronic (hot water or steam) systems
- Gas systems with intermittent ignition devices (I.I.D.) and/or vent dampers
- Not compatible with multi-stage systems, systems exceeding 30 VAC, or 3-wire zoned hydronic systems
Power Source:
- Battery: 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: 1.5 A per terminal, 2.5 A max combined
- Rated Differentials: Heat (0.6°F/1.5°F), Cool (1.2°F/1.7°F)
- Setpoint Range: 45°F to 99°F (7°C to 37°C)
Display: Backlit LCD display, continuously displays setpoint and alternates between room temperature and time
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:
- 7-day programmable scheduling with four time/temperature periods per day
- Simultaneous heat and cool program storage
- Energy Management Recovery (EMR) for early start (optional)
- Compressor protection (adjustable delay)
- Keypad lockout option
Thermostat Configuration Options:
- Single Stage (SS1): Gas, Oil, Electric, Heat Only, Cool Only, or Heat/Cool Systems - Maximum Stages Heat/Cool: 1/1
- Hydronic Zone (Hot Water or Steam) Systems, 24 Volt or Millivolt

Operation Instructions

Initial Setup

1. Insert Batteries: Install 2 AA alkaline batteries in the rear compartment, removing the battery tag to activate. Replace when “BATT” or “CHANGE” indicator 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.
3. Configure System:

Locate the ELECTRIC/GAS 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 holding TIME and PRGM buttons for 5 seconds.
Configure EMR (Energy Management Recovery, item 04), cycle rate, and compressor delay settings.
Exit by pressing RUN 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 to save and exit.

Operating in Non-Programmable Mode

1. Select Mode: Move SYSTEM switch to HEAT, COOL, or OFF.
2. Adjust Temperature: Press up/down arrows to set the desired temperature.
3. Fan Control: Move FAN switch to AUTO (runs with heating/cooling) or ON (continuous).
4. Manual Operation: Press HOLD to maintain a constant temperature, bypassing any programmed schedule. Press RUN 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 to use defaults.
2. Custom Schedule:

Move SYSTEM switch to HEAT or COOL.
Press PRGM, then select the day (or all days for 7-day programming).
Set times/temperatures for Morning, Day, Evening, and Night periods using TIME and up/down arrows.
Save by pressing RUN.

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

Advanced Features

1. Energy Management Recovery (EMR): When enabled (item 04 in CONFIGURATION MENU), the thermostat starts heating/cooling early to reach the setpoint by the programmed time.
2. Compressor Protection: Automatically delays compressor restart (up to 5 minutes) to prevent damage.
3. Keypad Lockout: Enable in CONFIGURATION MENU to restrict access; unlock by pressing TIME and PRGM simultaneously for 5 seconds.

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.
No Heat/Cool: Ensure SYSTEM switch is set to HEAT/COOL, setpoint is above/below room temperature, and circuit breaker is on. Check for compressor delay (up to 5 minutes).
Fan Runs Continuously: Set FAN switch to AUTO. Verify SYSTEM switch is not in AUTO mode if only heating or cooling is desired.
Inaccurate Temperature: Calibrate in CONFIGURATION MENU or relocate thermostat away from drafts, heat sources, or exterior walls.
Erratic Operation: Reset by pressing up/down arrows and TIME together. If issue persists, contact Emerson support at 1-888-725-9797.[](https://www.manualslib.com/manual/2923587/Emerson-White-Rodgers-1f87-361.html)

Installation Instructions

Warning: Thermostat installation and all components shall conform to Class II circuits per the NEC code.

Remove Old Thermostat

Turn off power at the main fuse or circuit breaker.
Remove the front cover of the old thermostat. With wires still attached, remove the wall plate.
Mark wires for terminal identification using the labels provided with the new thermostat to ensure correct connections.
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.
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 “BATT” or “CHANGE” appears or before leaving the home unoccupied for over 3 months.
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
W	Heat relay
Y	Compressor contactor (cooling)
G	Fan relay
O	Heat pump changeover valve (energized in cooling)
B	Heat pump changeover valve (energized in heating)

Note: For single-transformer systems, connect RC and RH with a jumper wire. Do not exceed specified voltage ratings. For two-wire heat-only systems, connect one wire to RH and the other to W.