Emerson 1F83H-21NP Thermostat Operation Manual

The Emerson 1F83H-21NP is a non-programmable thermostat designed for heat pump systems (2H/1C) and conventional single-stage systems. It features a backlit display, precise temperature control, and easy installation for battery-powered or hardwired setups. Below are the key specifications and operation instructions.

1. Key Specifications 2. Operation Instructions 2.1. Initial Setup 2.2. Operating the Thermostat 2.3. Temperature Display Adjustment 2.4. 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: Non-programmable, heat pump and single-stage thermostat
Compatibility:
- Heat pump systems (2H/1C, air source or geothermal, with auxiliary/emergency heat)
- Conventional single-stage systems (gas, oil, electric, millivolt, 24V)
- Heat only, cool only, or heat/cool systems
- Not compatible with systems exceeding 30 VAC or electric baseboard heat
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: 1.5 A per terminal, 2.5 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:
- Backlit display with large, easy-to-read temperature
- Adjustable temperature display calibration
- Compressor protection (up to 5-minute delay)
- Dual fuel capability with outdoor sensor (optional)
- Keypad lockout and temperature limit settings
- Optional wall cover 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 Aux./Emergency Heat - Maximum Stages Heat/Cool: 2/1

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 (Conventional or Heat Pump), heat cycle rate (Fast, Medium, Slow), compressor delay (item 50), and dual fuel logic (if applicable).
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.

Operating the Thermostat

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. 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.
In AUX mode (heat pumps), set temperature 1°F above room temperature; “Heat On Auxiliary” should display, and auxiliary heat should start.

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 RUN 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.
Room Temperature Rises in Cooling Mode: If the room temperature rises (e.g., to 77°F despite a lower setpoint), verify the outdoor unit is running and not obstructed. Check filters, vents, and ductwork for blockages. Ensure SYSTEM is set to COOL, not HEAT.

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 (e.g., oil boiler), 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.