Schluter-Systems DITRA-HEAT 120V Floor Heat Kit Instruction Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of the Schluter-Systems DITRA-HEAT 120V Floor Heat Kit. The DITRA-HEAT system is designed to provide radiant floor warming for tile and stone surfaces, while also offering uncoupling membrane functionality to protect tiles from subfloor movement. This kit includes the under-tile membranes, heating wire, and a programmable thermostat.

Figure 1: Schluter-Systems DITRA-HEAT Floor Warming Kit packaging, showing the membrane, heating cable, and programmable thermostat.

2. Kit Components

The Schluter-Systems DITRA-HEAT 120V Floor Heat Kit (Model DHEKRT12056) typically includes the following components:

• DITRA-HEAT Cable: Model DHEHK12038 (37.5 sq ft, 120V). This is the heating element that provides warmth to the floor.
• DITRA-HEAT Uncoupling Membrane Sheets: 7 sheets (58.8 sq ft total). These membranes provide a flexible layer between the tile and subfloor, preventing cracks and also serving as the base for the heating cable.
• DHERT102/BW Touchscreen Programmable Thermostat: A programmable thermostat for controlling the floor temperature.
• Floor Heat Sensors: 2 units. These sensors are embedded in the floor to accurately measure and regulate temperature.

3. Setup and Installation

Proper installation is crucial for the optimal performance and longevity of your DITRA-HEAT system. It is highly recommended that installation be performed by a qualified professional, especially for electrical connections.

3.1 Pre-Installation Checks

• Ensure the subfloor is clean, level, and structurally sound.
• Verify that the electrical supply matches the kit's voltage (120V).
• Familiarize yourself with all components and the overall layout plan.
• Perform an ohm meter check on the heating cable before, during, and after installation to ensure continuity and proper resistance.

3.2 Membrane Installation

1. Apply a modified thin-set mortar to the subfloor using a suitable trowel.
2. Lay the DITRA-HEAT uncoupling membrane sheets into the wet mortar, ensuring full coverage and proper adhesion.
3. Press the membrane firmly into the mortar to eliminate air pockets.

3.3 Heating Cable and Sensor Installation

1. Route the DITRA-HEAT heating cable into the studs of the uncoupling membrane according to your desired heating pattern. Ensure the cable does not cross itself and maintains proper spacing.
2. Install the floor heat sensors within the membrane, ensuring they are positioned in a heated area and away from direct sunlight or drafts for accurate temperature readings.
3. Important Note on Ground Cable: The ground cable within the heating wire is a mesh shield. When shortening the cable, exercise extreme caution to avoid cutting this mesh, as it will compromise the grounding.

3.4 Thermostat Wiring

• Connect the heating cable and sensor wires to the DITRA-HEAT thermostat.
• Thermostat Connection Tip: The terminal block for the sensors on the thermostat is small and located at the bottom of the circuit board. It is recommended to terminate the sensor wire before mounting the thermostat to the electrical box.
• Ensure the electrical box is deep enough to accommodate the thermostat, cables, and other wiring. The thermostat itself is relatively large.
• All electrical work should comply with local building codes and be performed by a licensed electrician.

After the heating system is installed and tested, a final layer of mortar can be applied over the membrane and cables, followed by the tile installation.

4. Operating Instructions

The DHERT102/BW thermostat is a touchscreen, programmable unit designed for user-friendly operation.

4.1 Initial Power-Up and Configuration

• Once electrical connections are complete, power on the system.
• Follow the on-screen prompts on the 3.5-inch LCD touchscreen to set the date, time, and initial temperature preferences.
• The thermostat supports Wi-Fi connectivity for remote control and advanced features (refer to the separate thermostat manual for detailed Wi-Fi setup).

4.2 Programming Schedules

• The thermostat allows for up to six programmable periods per day, enabling you to set different temperatures for various times (e.g., morning, day, evening, night).
• Utilize the programmable feature to optimize energy usage by lowering the temperature when the area is unoccupied.
• While generally user-friendly, some menu navigation may require familiarization. Consult the dedicated thermostat manual for comprehensive programming instructions.

4.3 Temperature Control

• Adjust the desired floor temperature directly via the touchscreen interface.
• The system uses floor sensors to maintain the set temperature accurately.
• The DITRA-HEAT system is designed for floor warming and comfort, not as a primary room heating source.

5. Maintenance

The Schluter-Systems DITRA-HEAT system is designed for minimal maintenance once properly installed. No routine maintenance is typically required for the heating elements or membrane.

• Keep the thermostat screen clean using a soft, dry cloth. Avoid abrasive cleaners.
• Periodically check the system's performance to ensure consistent floor warming.
• In case of any issues, refer to the troubleshooting section or contact a qualified technician.

6. Troubleshooting

If your DITRA-HEAT system is not functioning as expected, consider the following common issues and solutions:

• No Heat or Inconsistent Heating:
  • Check the thermostat settings to ensure it is programmed correctly and not in an "off" period.
  • Verify the circuit breaker for the heating system has not tripped.
  • Ensure the floor sensors are properly connected and functioning. A faulty sensor can lead to incorrect temperature readings.
  • If the system initially did not heat up, re-check all electrical connections. Professional assistance may be required to diagnose wiring issues.
• Thermostat Display Issues:
  • If the LCD display is blank, check power supply to the thermostat.
  • If the touchscreen is unresponsive, try a soft reset (refer to the thermostat manual for specific instructions).
• Electrical Issues:
  • Always use an ohm meter to check the heating cable's resistance during and after installation. Significant deviations from the expected resistance indicate a problem with the cable.
  • Ensure the ground cable is intact and properly connected. Damage to the ground mesh during installation can lead to grounding issues.
  • For any complex electrical problems, contact a certified electrician.

7. Specifications

8. Warranty Information

Specific warranty details for the Schluter-Systems DITRA-HEAT 120V Floor Heat Kit are not provided in the available product information. For comprehensive warranty terms and conditions, please refer to the documentation included with your product or visit the official Schluter-Systems website.

9. Support and Contact

For technical support, installation guidance, or further inquiries regarding your Schluter-Systems DITRA-HEAT 120V Floor Heat Kit, please contact Schluter-Systems directly. Contact information can typically be found on the product packaging, in the included documentation, or on their official website.