Emerson 1F95-1291 Thermostat Operation Manual

The Emerson 1F95-1291 is a Big Blue Humidity Universal Thermostat designed for single-stage, multi-stage, or heat pump systems, offering programmable (7-day, 5+1+1 day) or non-programmable modes. It features a 12-inch touchscreen display, humidity/dehumidification control, and automatic heat/cool changeover. 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, 5+1+1 day) or non-programmable, universal touchscreen thermostat
Compatibility:
- Single-stage systems (SS1: gas, oil, electric, heat only, cool only, or heat/cool)
- Multi-stage systems (MS2: gas, oil, electric)
- Heat pump systems (HP1: single-stage compressor, up to 2 stages aux./emergency heat; HP2: two-stage or two-compressor)
- Millivolt systems and 2 or 3 wire hydronic zone systems (hot water or steam)
- Not compatible with systems exceeding 30 VAC or electric baseboard heat
Power Source:
- Battery: mV to 30 VAC, NEC Class II, 50/60 Hz or DC (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 (Single Stage/Multi-Stage): Fast 0.6°F, Slow 1.5°F
  - Cool (Single Stage/Multi-Stage): Fast 1.2°F, Slow 1.7°F
  - Heat Pump: 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)
- Humidity Setpoint Range: 5 to 50%
- Dehumidification Setpoint Range: 40 to 95%
Display: 12-square-inch touchscreen LCD with backlight
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: 4-9/16” H x 5-13/16” W x 1-3/16” D
Features:
- 7-day or 5+1+1 day programmable scheduling with 4 periods per day
- Humidity control (humidification/dehumidification)
- Automatic heat/cool changeover
- Keypad lockout and setpoint temperature limits
- Heat pump dual fuel option (with or without outdoor sensor)
- Compressor protection (adjustable delay)
- Remote temperature sensing (indoor/outdoor, up to 300 ft)
- Energy-saving pre-programmed schedules
- Comfort Alert diagnostics for compressor monitoring
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): Gas, Oil, Electric - 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). If the home is unoccupied for over 3 months and the battery level is low, replace batteries before leaving.
2. Power On: If hardwired, ensure 20-30 VAC is supplied via the C terminal. The touchscreen should display the home screen with room temperature, setpoint, and humidity.
3. Configure System:

Press MENU, then hold INSTALLER CONFIG for 5 seconds to access the configuration menu.
Select system type (SS1, MS2, HP1, HP2), fan settings (Auto, On, Prog), and options like dual fuel (dF 01-09, default 05), humidity control (HM for humidification, DHM for dehumidification), or keypad lockout (select combination 000-999).
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 (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 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) or 5+1+1 (Mon-Fri, Sat, Sun).
Set times/temperatures for Wake, Leave, Return, Sleep periods for each day/group.
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. Humidity Control: Configure humidification/dehumidification in INSTALLER CONFIG menu (HM for humidification, DHM for dehumidification). Press the humidity button, then up/down arrows to set desired humidity percentage (5-50% for humidification, 40-95% for dehumidification). In AC mode, if humidity exceeds setpoint, cooling runs to lower humidity, possibly dropping temperature below setpoint.
2. Dual Fuel: With an outdoor sensor, set dual fuel balance point (dF 01-09) in INSTALLER CONFIG to optimize heat pump and fossil fuel operation.
3. Keypad Lockout: Enable in INSTALLER CONFIG with a 3-digit code (000-999); unlock by pressing MENU and RUN SCHED simultaneously for 5 seconds, entering the code.
4. Comfort Alert: If connected to a Comfort Alert module, displays fault codes for compressor issues, flashing “Call For Service” on the screen.
5. Remote Sensors: Supports indoor/outdoor sensors for weighted temperature averaging (configured in INSTALLER CONFIG).
6. Continuous Display Lighting: Enable in INSTALLER CONFIG (requires C wire) for constant backlight in low-light conditions.

Troubleshooting

No Display: Check battery polarity or replace with fresh AA alkaline batteries. Verify C wire connection for hardwired setups. Reset by removing batteries and R/C wires for 2 minutes, then reinserting. If display remains blank, clean battery contacts with a pencil eraser.
No Heat/Cool: Ensure SYSTEM is set to HEAT/COOL/EMER, setpoint is above/below room temperature, and circuit breaker is on. Check for compressor delay (up to 5 minutes, indicated by flashing setpoint). Verify wiring, especially for heat pumps (O/B, W/E, W2). If no response, bypass thermostat by connecting R, G, and Y wires to test system.
System Runs Continuously: If the air conditioner doesn’t turn off when cooling demand ends, set Power Stealing Switches to “Off” to disable Power Stealing Assist. Ensure SYSTEM is set to COOL (not COOL AUTO) and FAN to AUTO. Verify setpoint settings.
Inaccurate Temperature: Calibrate in INSTALLER CONFIG (up to ±5°F). Ensure thermostat is not near drafts, heat sources, or exterior walls. If using remote sensors, check sensor weighting in INSTALLER CONFIG.
Humidity Issues: If humidity control fails, verify HM/DHM settings in INSTALLER CONFIG and ensure compatible equipment is installed. In COOL mode, high humidity may trigger cooling to reduce humidity.
Erratic Operation or “Call For Service”: If “Call For Service” flashes, check Comfort Alert codes for compressor issues. Reset by removing thermostat from wall and 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. To prevent electrical shock or equipment damage, disconnect power at the main fuse or circuit breaker before installation.

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 (refer to equipment manufacturer’s instructions).
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 the air conditioner does not turn off when cooling demand ends, set switches to “Off” to operate on batteries, correcting the condition.