Emerson 1F83H 21PR Thermostat Operation Manual

The Emerson 1F83H 21PR is a programmable, heat pump thermostat designed for 2H/1C systems, including single-stage compressor heat pumps with auxiliary heat. It offers 7-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 (7-day), heat pump thermostat
Compatibility:
- Heat pump systems (2H/1C, single-stage compressor with auxiliary heat)
- Conventional single-stage systems (gas, oil, electric, millivolt, 24V)
- Electric or gas dual-fuel systems
- Not compatible with systems exceeding 30 VAC
Power Source:
- Battery: 20-30 VAC, NEC Class II, 50/60 Hz (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 (@ 6°F/Hr):
  - Heat Pump (Heat): Fast 0.9°F, Medium 1.2°F, Slow 1.7°F
  - Heat Pump (Cool): Fast 0.9°F, Medium 1.2°F, Slow 1.7°F
  - Auxiliary Heat: Fast 0.5°F, Medium 0.75°F, Slow 1.9°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:
- 7-day programmable scheduling with four time/temperature periods
- Backlit display with large, easy-to-read temperature
- Adjustable temperature display calibration
- Compressor protection (up to 5-minute delay)
- Dual fuel logic for optimized operation (optional)
- Optional wall cover-up plate (F61-2663, 6-3/4” W x 4-1/2” H)
- Continuous display light option (requires C wire)
Thermostat Configuration Options:
- Heat Pump (Air Source or Geothermal) with Aux./Emergency Heat - Maximum Stages Heat/Cool: 2/1
- Conventional Single-Stage Gas, Oil, Electric (mV and 24V) - 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 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 (Heat Pump or Conventional), heat cycle rate (Fast, Medium, Slow), compressor delay (item 50), and dual fuel logic (if applicable, item 20).
For heat pumps, set O/B switch to O (cool) or B (heat) based on system requirements.
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, 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. 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 heat pump should start.
In COOL mode, set temperature 1°F below room temperature; “Cool On” should display after up to a 5-minute compressor delay (indicated by “Starting Soon”).
In AUX mode, set temperature 3°F above room temperature; “Heat On Auxiliary” should display, and auxiliary heat should start.

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 programming for individual days.
Set times/temperatures for Wake, Leave, Return, Sleep periods for each day.
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 or pressing MENU and Backlight simultaneously until the display blanks.
No Heat/Cool: Ensure SYSTEM is set to HEAT/COOL/AUX, setpoint is above/below room temperature, and circuit breaker is on. Check for compressor delay (up to 5 minutes, indicated by “Starting Soon”). Verify wiring and O/B switch setting for heat pumps.
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 placed about 1.5 meters above the floor, away from 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.
Continuous Backlight Not Working: Ensure C wire is connected, as continuous backlight requires hardwired power. Enable in INSTALLER MENU (item 30, Continuous Display Light option).

Installation Instructions

Warning: Thermostat installation and all components shall conform to Class II circuits per the NEC code. Do not use on circuits exceeding specified voltage to avoid damage or hazards.

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

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 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). If separate W2 and E wires exist, clip the W2/E jumper on the back of the thermostat.
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 the low battery indicator appears or before leaving the home unoccupied for over 3 months.
Use premium brand AA alkaline batteries (e.g., Duracell or Energizer) for reliable performance.

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/E	Heat relay or emergency heat (heat pump)
W2	Auxiliary heat (heat pump)
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 R and the other to W/E. For heat pumps, clip W2/E jumper if separate W2 and E wires are used. Set O/B switch to “O” or “B” as required. Do not exceed specified voltage ratings. For dual fuel applications, enable Dual Fuel Logic in the INSTALLER MENU (item 20).