Emerson 1F95EZ-0671 Thermostat Operation Manual

The Emerson 1F95EZ-0671 is a Blue Easy Reader 6-Inch Universal Thermostat designed for single-stage, multi-stage, or heat pump systems, offering programmable (7-day) or non-programmable modes. It features a large, easy-to-read display, one-button-to-one-function operation, and compatibility with most HVAC systems. 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. Power Stealing Switches

Key Specifications

Type: Programmable (7-day) or non-programmable, universal thermostat
Compatibility:
- Single-stage systems (SS1: gas, oil, electric)
- Multi-stage systems (MS2: gas, oil, electric)
- Heat pump systems (HP1: single-stage compressor; HP2: multi-stage or dual compressor)
- Millivolt systems
- 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
- Power Stealing Assist for systems without C wire
Electrical Rating:
- Terminal Load: 1.5 A per terminal, 2.5 A max combined
- Rated Differentials (@ 6°F/Hr):
  - Heat (SS/MS): Fast 0.6°F, Slow 1.5°F
  - Cool (SS/MS): Fast 1.2°F, Slow 1.7°F
  - Heat Pump (Heat/Cool): Fast 1.2°F, Slow 1.7°F
  - Emergency Heat: Fast 0.6°F, Slow 1.7°F
- Setpoint Range: 45°F to 99°F (7°C to 37°C)
Display: 6-square-inch backlit LCD display with easy-to-read characters
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: 4-3/16” H x 6-1/2” W x 1-5/8” D
Features:
- 7-day programmable scheduling
- Automatic heat/cool changeover
- Fast second-stage heat/cool (optional, for multi-stage or heat pump systems)
- Keypad lockout
- Filter change reminder
- Compressor protection (adjustable delay)
- Energy-saving pre-programmed schedules
- Daylight Savings Time calculation (default enabled)
Thermostat Configuration Options:
- Single Stage 1 No Heat Pump (SS1): Gas, Oil, Electric, Heat Only, Cool Only or Heat/Cool Systems, 2 or 3 wire Hydronic Zone (Hot Water or Steam) Systems, 24 Volt or Millivolt - Maximum Stages Heat/Cool: 1+1
- Multi Stage 2 No Heat Pump (MS2) - Maximum Stages Heat/Cool: 2+2
- Heat Pump 1 Single Stage Compressor Heat Pump (HP1) - Single Stage Compressor Heat Pump Systems - up to 2 Stages Aux./Emergency Heat - Maximum Stages Heat/Cool: 3+1
- Heat Pump 2 Two Stage or Two Compressor Heat Pump (HP2) - Two Stage or Two Compressor Heat Pump systems - Maximum Stages Heat/Cool: 4+2

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 MENU, then hold INSTALLER CONFIG for 5 seconds.
Select system type (SS1, MS2, HP1, HP2), fan settings (Auto, On, Prog), and other options like fast second-stage (FA Heat/Cool, for multi-stage or heat pump systems) or keypad lockout.
Exit by pressing RUN SCHED or waiting for the display to return to normal.

Setting the Clock and Day

1. Press MENU, then select SET TIME.
2. Use up/down arrows to adjust hours, minutes, and AM/PM.
3. Select SET DAY and adjust to the current day of the week.
4. Press RUN SCHED to save and exit.

Operating in Non-Programmable Mode

1. Select Mode: Press SYSTEM to choose HEAT, COOL, AUTO, EMER, or OFF.
2. Adjust Temperature: Press up/down arrows to set the desired temperature.
3. Fan Control: Press FAN to select AUTO (runs only when heating/cooling) or ON (continuous).
4. Manual Override: Press HOLD and adjust temperature to bypass any schedule until RUN SCHED is pressed.

Operating in Programmable Mode

1. Factory Schedule: The thermostat is pre-programmed with energy-saving settings (e.g., Heat: 70°F day, 62°F night; Cool: 78°F day, 82°F night). Press RUN SCHED to use defaults.
2. Custom Schedule:

Press MENU, then SET SCHEDULE, and select HEAT or COOL.
Choose 7-day (individual days) programming.
Set times/temperatures for Morn, Day, Eve, Night periods for each day.
Save by pressing RUN SCHED.

3. Temporary Override: Press up/down arrows to adjust temperature temporarily until the next period.
4. Permanent Hold: Press HOLD and adjust temperature to maintain it until RUN SCHED is pressed.
5. Disable Programming: Press MENU, hold INSTALLER CONFIG for 5 seconds, and set programming to P0 (non-programmable).

Advanced Features

1. Fast Second-Stage Heat/Cool: Enable in INSTALLER CONFIG (On FA Heat/Cool) to immediately engage second-stage heating/cooling when setpoint is 3°F (2°C) above/below actual temperature (for multi-stage or heat pump systems). If disabled, second-stage delays 10+ minutes when setpoint is 1°F above/below.
2. Daylight Savings Time Calculation: Enabled by default, automatically adjusts real-time clock display. Disable in INSTALLER CONFIG if desired.
3. Keypad Lockout: Enable in INSTALLER CONFIG to restrict access; unlock by pressing MENU and RUN SCHED simultaneously for 5 seconds.
4. Filter Change Reminder: Alerts when filter replacement is needed; reset in CONFIG menu.
5. Compressor Protection: Automatically delays compressor restart (up to 5 minutes) to prevent damage.

Troubleshooting

No Display: Check battery polarity or replace batteries. Verify hardwired connections. Reset by removing R/C wires and batteries for 2 minutes.
No Heat/Cool: Ensure SYSTEM is set to HEAT/COOL/EMER, setpoint is above/below room temperature, and wiring is correct. Check for compressor delay (up to 5 minutes).
System Runs Continuously: In COOL mode, select COOL (not COOL AUTO) and set FAN to AUTO. Verify setpoint settings.
Inaccurate Temperature: Calibrate in INSTALLER CONFIG or relocate away from drafts/heat sources.
Erratic Operation: Reset by pressing MENU and RUN SCHED simultaneously for 5 seconds or removing batteries for 2 minutes. If issues persist, contact a professional technician.

Installation Instructions

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

Remove Old Thermostat

Before removing wires, mark wires for terminal identification to ensure proper connections to the new thermostat.

Installing New Thermostat

Pull the thermostat body off the thermostat 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, drill mounting holes. Use plastic screw anchors if existing holes are too large.
Fasten base snugly to the wall using mounting holes and two mounting screws. Leveling is for appearance only and does not affect operation.
Connect wires to the terminal block on the base using the appropriate wiring schematic.
Push excess wire into the wall and plug the hole with fire-resistant material (e.g., fiberglass insulation) to prevent drafts.
Carefully line the thermostat up with the base and snap into place.

Battery Location

Includes 2 “AA” alkaline batteries at the factory with a battery tag to prevent power drainage. Remove the tag to engage batteries.
To replace, set system to OFF, remove thermostat from the wall, and install batteries in the rear along the top. Use premium brand “AA” alkaline batteries like Duracell or Energizer.
If the home will be unoccupied for over 3 months and the battery level indicator shows low, replace batteries before leaving.

Power Stealing Switches

Leave switches in the “On” position for most systems. Details in the following table:

Thermostat Power Method	Switch Position/Description
Battery Powered, no 24 Volt system	Switches “On”, thermostat runs on batteries.
Hardwired with Battery Back-up, for 24 Volt systems with common connection from transformer to “C” terminal	Switches “On”, thermostat runs on power directly from transformer with battery back-up.
Battery Powered with Power Stealing Assist, for 24 Volt systems with no common connection	Switches “On”, thermostat runs on batteries and supplemental power drawn through heat or cool circuit.

Caution: Power Stealing Assist may cause issues on systems with high impedance electronic modules (e.g., furnace draft inducer motor running with no call for heat, furnace fan not turning off). If incompatible, set switches to “Off” to operate on batteries.