Coiiwsei Programmable Thermostat RTH725 for Home

1. Product Overview

The Coiiwsei Programmable Thermostat RTH725 is designed to provide precise temperature control for your home. It features a clear, backlit LCD display and user-friendly controls for easy operation and programming. This thermostat is compatible with various heating and cooling systems, offering flexibility and energy efficiency.

Figure 1: Front view of the Coiiwsei RTH725 Thermostat.

Key Features:

• High Compatibility with 2 Heat/1 Cool Heat Pump or 1 Heat/1 Cool Conventional Systems.
• Large, clear, easy-to-read backlight LCD display.
• 7-day, 5/1/1 programmable schedule for energy efficiency.
• Easy installation with large terminal blocks.
• Battery or 24V power options.

2. System Compatibility

Before installation, verify that your HVAC system is compatible with the Coiiwsei RTH725 thermostat.

Compatible Systems:

• Heat pump multi-stage systems (2 Heat/1 Cool).
• Conventional single-stage systems (1 Heat/1 Cool).
• Forced air systems (gas, oil, or electric).
• Electric furnace.
• Hot water steam or gravity radiant heat.
• Heat-only systems.
• Heat pump with or without auxiliary/emergency heat.
• Millivolt conventional systems.
• Gas fireplaces (24V).
• Floor or wall furnaces.
• Cool-only systems.

Not Compatible With:

• Two transformer systems.
• Conventional multi-stage systems.
• Dual fuel/hybrid heating systems.
• Electric baseboard heat (110-240 volts).
• Line voltage systems.
• Convectors.
• Radiant-ceiling heat.
• Mini split systems.
• 12V RV systems.

Figure 2: System Compatibility Overview.

3. Installation and Setup

3.1 Important Safety Information:

• Always turn off power at the main power source (circuit breaker or fuse box) before installing, removing, cleaning, or servicing the thermostat.
• Read all information in this manual before installing or programming this thermostat.
• Before removing your old thermostat, label the wires with the supplied wire labels to ensure correct re-connection.

3.2 What's in the Box:

Your package should contain the following items:

• 1 x Coiiwsei Programmable Thermostat
• 1 x Wall Plate
• 1 x Instruction Manual (this document)
• 1 x Set of Wiring Labels
• 1 x Set of Screws

3.3 Wiring Instructions:

Follow these steps to correctly wire your new thermostat. Refer to the wiring diagram below.

1. Turn off power to your HVAC system at the circuit breaker.
2. Remove your old thermostat's cover and note the wire connections. Use the provided labels to mark each wire according to its terminal.
3. Disconnect the wires and remove the old thermostat's wall plate.
4. Mount the new Coiiwsei wall plate to the wall using the supplied screws.
5. Connect the labeled wires to the corresponding terminals on the new wall plate. Ensure connections are secure.
6. Important: 4 wires must be connected for full functionality. If only 2 wires are available, the thermostat must be used with batteries for power.

Figure 3: Thermostat Wiring Terminals and Connections.

Terminal Definitions:

• C: Common 24VAC (system power supply)
• O: Reversing Valve COOL
• B: Reversing Valve HEAT
• W/E: Emergency heat relay stage 1
• W2: Auxiliary heat relay stage 2
• R: 24VAC (system power supply)
• G: FAN
• Y: Cool relay

3.4 Battery Installation:

The thermostat requires 2 AA alkaline batteries (not supplied) for operation if a C-wire is not connected, or as a backup power source if a C-wire is present. The battery compartment is located at the bottom of the thermostat unit.

1. Gently pull open the battery door located at the bottom front of the thermostat.
2. Insert two new AA alkaline batteries, ensuring correct polarity (+/-).
3. Close the battery door securely.

A low battery indicator will appear on the display when batteries need replacement.

4. Operating Instructions

4.1 Thermostat Layout and Display:

Familiarize yourself with the thermostat's buttons and display indicators.

Figure 4: Thermostat Layout and User Interface.

• Display: Shows current temperature, set temperature, time, day, system mode, fan status, and programming indicators.
• Up/Down Buttons (+/-): Adjust temperature settings and navigate programming menus.
• Menu Button: Accesses programming and setup options.
• Clean Button: (Function not explicitly detailed in provided data, typically for screen cleaning mode).
• FAN Switch (ON/AUTO):
  • ON: Fan runs continuously.
  • AUTO: Fan runs only when heating or cooling system is active.
• SYSTEM Switch (COOL/OFF/HEAT/EMH):
  • COOL: Thermostat controls cooling.
  • OFF: System is off.
  • HEAT: Thermostat controls heating.
  • EMH (Emergency Heat): For heat pump systems, activates auxiliary/emergency heat directly.

4.2 Setting Time and Day:

Detailed instructions for setting the time and day are typically found within the thermostat's menu system. Consult the on-screen prompts after pressing the "Menu" button.

4.3 Programming the Schedule (7-Day, 5/1/1):

The RTH725 thermostat offers flexible 7-day programming, including 5/1/1 day options (weekdays, Saturday, Sunday). This allows you to set different temperature schedules for various times of the day to optimize comfort and energy savings.

1. Press the Menu button to enter programming mode.
2. Use the Up/Down (+/-) buttons to navigate through the programming options (e.g., Set Time, Set Day, Program Schedule).
3. Select "Program Schedule" and follow the on-screen prompts to set desired temperatures for different time periods (Wake, Leave, Return, Sleep) for each day or group of days.
4. Confirm each setting to save your changes.

The factory pre-set energy-efficiency program can be used, or you can customize it to your specific needs.

4.4 Adjusting Temperature:

To temporarily adjust the temperature, simply press the Up (+) or Down (-) buttons. The new temperature will be maintained until the next programmed schedule period begins.

The temperature set range is 44°F to 90°F (7°C to 32°C).

5. Maintenance

5.1 Battery Replacement:

When the low battery indicator appears on the display, replace the 2 AA alkaline batteries promptly to ensure continuous operation and prevent loss of settings (if no C-wire is connected).

1. Open the battery compartment door.
2. Remove the old batteries.
3. Insert two new AA alkaline batteries, observing correct polarity.
4. Close the battery compartment door.

5.2 Cleaning the Thermostat:

To clean the thermostat's exterior, gently wipe it with a soft, damp cloth. Do not use abrasive cleaners, solvents, or spray cleaners directly onto the thermostat. Ensure no moisture enters the internal components.

6. Troubleshooting

If you experience issues with your Coiiwsei RTH725 thermostat, refer to the following common problems and solutions:

If problems persist, contact customer support for assistance.

7. Specifications

Figure 5: Thermostat Technical Parameters.

Figure 6: Thermostat Dimensions.

8. Warranty and Support

8.1 Warranty Information:

Specific warranty details are not provided in the product information. Please refer to the product packaging or contact the manufacturer directly for warranty terms and conditions.

8.2 Customer Support:

For technical assistance, troubleshooting, or any questions regarding your Coiiwsei Programmable Thermostat RTH725, please contact Coiiwsei customer service. The manufacturer states customer service is available 7 days a week, 24 hours a day.

Refer to the Coiiwsei brand store on Amazon for potential contact information: Coiiwsei Store