Emerson 1F85U-22PR Thermostat Operation Manual

The Emerson 1F85U-22PR is a Universal 80 Series Programmable Thermostat designed for single-stage, multi-stage, or heat pump systems, offering 7-day or 5+1+1 programmable modes. It features a clear digital display, filter change reminders, and energy-saving settings like Vacation Mode. 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, 5+1+1 day), universal thermostat
Compatibility:
- Conventional systems (gas, oil, electric, millivolt, 24V)
- Heat pump systems with auxiliary heat
- Single-stage or multi-stage systems (up to 2 heat/2 cool stages)
- Not compatible with systems exceeding 30 VAC
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
- Setpoint Range: 45°F to 99°F (7°C to 37°C)
Display: Backlit digital display
Operating Conditions:
- Ambient: 32°F to 105°F (0°C to 41°C)
- Humidity: 90% non-condensing max
- Shipping: -20°F to 150°F (-29°C to 65°C)
Dimensions: 3-3/4” H x 6” W x 1-1/8” D
Features:
- 7-day or 5+1+1 programmable scheduling
- Automatic heat/cool changeover
- Vacation Mode for energy savings
- Filter change reminder
- Adjustable temperature differentials
- Compressor protection (up to 5-minute delay)
- Keypad lockout option
Thermostat Configuration Options:
- Conventional Gas, Oil, Electric (mV and 24V), Heat Only, Cool Only, or Heat/Cool Systems - Maximum Stages Heat/Cool: 2/2
- Heat Pump (Air Source or Geothermal) with Aux. Heat - Maximum Stages Heat/Cool: 2/1

Operation Instructions

Initial Setup

1. Insert Batteries: Install 2 AA alkaline batteries in the rear compartment. Replace when the battery indicator shows low (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:

Press and hold MENU for 8 seconds to access INSTALLER MENU.
Select system type (e.g., Conventional, Heat Pump), fan settings (Auto, On), and other options like compressor delay (item 50) or emergency heat (item 15).
Exit by pressing RUN or waiting for the display to return to normal.

Setting the Clock and Day

1. Press MENU, then select Settings.
2. Use Next/Back to navigate to SET TIME, adjust hours and minutes with up/down arrows.
3. Navigate to SET DAY and select the current day.
4. Press RUN to save and exit.

Operating in Non-Programmable Mode

1. Select Mode: Press SYSTEM to choose HEAT, COOL, AUTO, AUX (for heat pumps), 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 Override: Press HOLD to set a constant temperature, bypassing any schedule until RUN is pressed.

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:

Press MENU, then Program, and select HEAT or COOL.
Choose 7-day or 5+1+1 programming.
Set times/temperatures for Wake, Leave, Return, Sleep periods.
Save by pressing SET or RUN.

3. Temporary Override: Adjust temperature with up/down arrows; it holds until the next period.
4. Permanent Hold: Press HOLD to maintain a set temperature until RUN is pressed.
5. Disable Programming: In INSTALLER MENU, set item 01 to 0 (non-programmable).

Advanced Features

1. Vacation Mode: Press MENU, select Program, scroll to Vacation, set start/end dates and temperature.
2. Filter Change Reminder: Alerts when filter replacement is needed; reset in USER MENU.
3. Keypad Lockout: Enable in INSTALLER MENU to restrict access; unlock by pressing MENU and RUN simultaneously for 8 seconds.
4. Compressor Protection: Automatically delays compressor restart (up to 5 minutes) to prevent damage.

Troubleshooting

No Display: Check battery polarity or replace batteries. Verify C wire connection for hardwired setups. Reset by removing batteries for 2 minutes.
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).
Fan Runs Continuously: Set FAN to AUTO. Verify SYSTEM is not in AUTO mode if only heating or cooling is desired.
Inaccurate Temperature: In USER MENU, select Calibrate Temperature and adjust using a separate thermometer. Relocate thermostat if near drafts/heat sources.
Thermostat Locked: Press MENU and RUN together for 8 seconds to unlock.

Installation Instructions

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

Remove Old Thermostat

Mark wires for terminal identification before removing to ensure correct connections to the new thermostat.

Installing New Thermostat

Pull the thermostat body 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 needed.
Fasten base snugly to the wall using mounting holes and two 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

Install 2 AA alkaline batteries in the rear compartment along the top. Remove the battery tag to engage batteries.
Replace batteries when low indicator appears or before leaving the home unoccupied for over 3 months.

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); jumper to RH not required
RH	Heating power (24 VAC); jumper to RC not required
C	Common wire for 24 VAC power from transformer
Y	Compressor contactor (cooling, stage 1)
Y2	Compressor contactor (cooling, stage 2, if applicable)
W/E	Heat relay (stage 1) or emergency heat (heat pump)
W2	Heat relay (stage 2) or auxiliary heat (heat pump)
G	Fan relay
O/B	Heat pump changeover valve (O: cool, B: heat)

Note: Wiring changes for dedicated emergency heat (see INSTALLER MENU item 15). Do not exceed specified voltage ratings.