Introduction
This manual provides instructions for the installation, operation, and maintenance of your Mroinge M701 Non-Programmable Thermostat. This device is designed for single-stage 1 Heat/1 Cool systems, offering clear temperature and humidity display with a large blue LCD.
Product Features
- Large LCD display with blue backlight for clear readability.
- Displays current room temperature and humidity.
- Compatible with single-stage 1H/1C systems (Gas, Oil, or Electric Furnaces).
- Dual power options: 24VAC power source or 2 AAA batteries (C-wire not required for battery operation).
- Separate heating and cooling swing settings for optimal comfort control.
- Temperature calibration function for accurate readings.
- Built-in 3-minute compressor delay protection to extend HVAC system lifespan.
Important Compatibility Note: This thermostat is not compatible with Heat Pump Systems, Aux heating, Emergency heating, Multi-Stage Systems, RV systems, or 120/240V Electric Baseboard/Line Volt Systems.
What's in the Box
This image displays the contents of the Mroinge M701 thermostat packaging. It includes the thermostat unit, mounting hardware, an installation manual, and terminal wire label stickers.
- 1 x Mroinge M701 Thermostat
- 1 x Installation Manual
- 2 x Mounting Screws and Wall Anchors
- 1 x Terminal Wire Label Stickers
Installation Guide
Before You Begin
- Ensure the power to your heating/cooling system is turned off at the main breaker before starting installation.
- Confirm compatibility with your existing system. This thermostat is designed for single-stage 1H/1C systems (Gas, Oil, Electric Furnaces).
- Gather necessary tools: screwdriver, wire strippers (if needed).
Removing Your Old Thermostat
- Carefully remove the cover of your old thermostat.
- Take a picture of the wiring connections for reference.
- Label each wire with the provided terminal wire label stickers according to its connection on your old thermostat.
- Disconnect the wires and remove the old thermostat base from the wall.
Mounting the New Thermostat
This image displays the dimensions of the Mroinge M701 thermostat: 4.92 inches (width) x 3.74 inches (height) x 0.98 inches (depth).
- Position the new thermostat base on the wall and mark the mounting holes.
- Drill pilot holes if necessary and insert wall anchors.
- Secure the new thermostat base to the wall using the provided screws.
Wiring the Thermostat
This image illustrates the wiring terminals on the Mroinge M701 thermostat base. It shows common terminals (C, O, B, W) and power/relay terminals (RH, RC, G, Y).
- Connect the labeled wires from your wall to the corresponding terminals on the new thermostat base. Ensure connections are secure.
- Refer to the terminal label reference chart for specific wire functions.
Note: If your system has thick, stranded wires, or wires labeled 110V or 120V, it is not compatible with this thermostat.
Powering the Thermostat
The thermostat can be powered either by a 24VAC C-wire or by 2 AAA batteries.
- If using batteries, insert 2 fresh AAA alkaline batteries into the battery compartment.
This image shows the battery compartment located at the top of the Mroinge M701 thermostat, designed for easy battery replacement. It indicates that 2 AAA batteries are required and not supplied.
Completing Installation
- Carefully attach the thermostat front panel to the mounted base.
- Restore power to your heating/cooling system at the main breaker.
Operating Instructions
Display Overview
This image shows the main display of the Mroinge M701 thermostat. It features a large blue LCD screen displaying the current room temperature (e.g., 90°F), the set temperature (e.g., 79°F), and indicators for system mode (Cool) and fan status.
The large blue LCD screen displays:
- Current Room Temperature (range: 32°F to 99°F / 0°C to 50°C)
- Set Temperature (range: 44°F to 90°F / 7°C to 32°C)
- Room Humidity (range: 10%RH to 99%RH)
- System Mode (Cool, Heat, Off)
- Fan Mode (On, Auto)
- Low Battery Indicator
Setting the Temperature
Use the Up and Down arrow buttons on the right side of the thermostat to adjust the desired set temperature.
This image shows a hand pressing the "Up" arrow button on the Mroinge M701 thermostat to increase the set temperature. The display clearly shows the room temperature and the adjustable set temperature.
System Mode Selection
Use the SYSTEM switch at the bottom of the thermostat to select the operating mode:
- COOL: Activates the cooling system when the room temperature rises above the set temperature.
- OFF: Turns off both heating and cooling systems.
- HEAT: Activates the heating system when the room temperature falls below the set temperature.
Fan Mode Selection
Use the FAN switch at the bottom of the thermostat to select the fan operation mode:
- ON: The fan runs continuously, regardless of whether the heating or cooling system is active.
- AUTO: The fan runs only when the heating or cooling system is actively operating.
Temperature Calibration
The thermostat allows for temperature calibration to ensure accurate readings. Refer to the full installation manual for detailed steps on how to access and adjust this setting.
Compressor Delay Protection
This thermostat includes a built-in 3-minute compressor delay protection. This feature helps prevent short cycling of the compressor, extending the lifespan of your HVAC system. This function is selectable ON or OFF.
Separate Heating and Cooling Swing (Cycle Rate)
This image shows the Mroinge M701 thermostat display indicating a "Cool Swing" setting of "0.4°F". This setting defines the temperature differential before the system activates.
The swing setting, also known as cycle rate or differential, determines the temperature range within which the thermostat will activate the heating or cooling system. A smaller swing setting results in more frequent cycles, while a larger swing setting leads to fewer cycles. The factory default for both heating and cooling swing is 0.4°F.
Maintenance
Battery Replacement
When the low battery indicator appears on the display, replace the 2 AAA alkaline batteries.
- To replace batteries, gently pull the front cover of the thermostat forward to access the battery compartment.
- Insert new batteries, ensuring correct polarity.
- Snap the front cover back into place.
Cleaning
Clean the thermostat's exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power (batteries dead or C-wire disconnected) | Replace batteries or check C-wire connection and circuit breaker. |
| Heating/Cooling system not responding | Incorrect system mode; wiring issue; power off | Check SYSTEM switch setting. Verify wiring connections. Ensure power is on at the breaker. |
| Inaccurate temperature reading | Thermostat location; calibration needed | Ensure thermostat is not in direct sunlight or near heat sources. Perform temperature calibration. |
| System cycles too frequently/infrequently | Swing setting adjustment | Adjust the heating/cooling swing setting to a desired differential. |
If problems persist after attempting these solutions, please contact customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | Mroinge |
| Model Number | M701 |
| Product Dimensions | 0.99"D x 4.92"W x 3.74"H |
| Controller Type | Push Button |
| Special Feature | Large Display |
| Color | Blue Backlight |
| Specific Uses For Product | Furnace |
| Temperature Control Type | Manual |
| Included Components | Temperature Sensor |
| Power Source | Dual (24VAC or 2 AAA Batteries) |
| Item Weight | 5.8 ounces |
| Voltage | 24.0V |
| Display Type | LCD |
| Screen Size | 3 Inches |
| Control Type | Button Control |
| Control Method | Touch |
| Mounting Type | Wall Mount |
| Backlight | Yes |
| Date First Available | August 1, 2023 |
Warranty and Support
Warranty Information
This Mroinge M701 Thermostat comes with a 2-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
Please retain your proof of purchase for warranty claims.
Customer Support
For technical assistance, troubleshooting, or warranty inquiries, please contact Mroinge customer support. Refer to the contact information provided with your product packaging or visit the official Mroinge website.
Visit the Mroinge Store on Amazon for more product information.