Emerson 1F83C-11PR Thermostat Operation Manual

The Emerson 1F83C-11PR is a programmable, single-stage thermostat designed for conventional gas, oil, electric, or heat pump systems with no auxiliary heat. It offers 5+1+1 day programming, a backlit display, and simple operation for 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. Temperature Display Adjustment 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)
- Heat pump systems (air source or geothermal) with no auxiliary heat
- Heat only, cool only, or heat/cool systems
- Not compatible with systems exceeding 30 VAC
Power Source:
- Battery: mV to 30 VAC, NEC Class II, 50/60 Hz
- 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 (@ 6°F/Hr): Fast 0.5°F, Medium 0.75°F, Slow 1.9°F
  - Cool (@ 6°F/Hr): Fast 0.9°F, Medium 1.2°F, Slow 1.7°F
- Setpoint Range: 45°F to 99°F (7°C to 37°C)
Display: Backlit LCD display, adjustable ±5°F
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:
- 5+1+1 day programmable scheduling
- Backlit display with large, easy-to-read temperature
- Adjustable temperature display calibration
- Compressor protection (up to 5-minute delay)
- Optional wall cover-up plate (F61-2663, 6-3/4” W x 4-1/2” H)
Thermostat Configuration Options:
- Conventional Gas, Oil, Electric (mV and 24V), Heat Only, Cool Only, or Heat/Cool Systems - Maximum Stages Heat/Cool: 1/1
- Heat Pump (Air Source or Geothermal) with no Aux. Heat - Maximum Stages Heat/Cool: 1/1

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 (item 30).
Select system type (Conventional or Heat Pump), heat cycle rate (Fast, Medium, Slow), and compressor delay (item 50).
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 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, 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. Disable Programming: In INSTALLER MENU (item 30), set item 01 to 0 (non-programmable).
5. Verify Operation:

In HEAT mode, set temperature 1°F above room temperature; "Heat On" should display, and the system should start.
In COOL mode, set temperature 1°F below room temperature; "Cool On" should display after up to a 5-minute compressor delay.

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 5+1+1 programming (Mon-Fri, Sat, Sun).
Set times/temperatures for Wake, Leave, Return, Sleep periods for each day group.
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 (item 01), set to 0 (non-programmable).

Temperature Display Adjustment

1. Press MENU to access USER MENU.
2. Use NEXT to navigate to Thermometer Adjustment (item 07).
3. Press up/down arrows to adjust the displayed temperature by ±5°F to match the actual room temperature.
4. Press RUN to save and exit.
Note: Use a separate thermometer for calibration. Relocate the thermostat if near drafts or heat sources.

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).
Furnace Cycles Too Often: In INSTALLER MENU (item 30), adjust heat cycle rate to MEDIUM or SLOW to reduce cycling frequency.
Inaccurate Temperature: Calibrate in USER MENU (item 07). Ensure thermostat is not near drafts, heat sources, or exterior walls.
Blank Display After Battery Replacement: Remove thermostat from base, wait 30 seconds, and reattach. Check wiring for loose connections.

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
R	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 (e.g., oil boiler), connect one wire to R and the other to W. Do not exceed specified voltage ratings.