nVent NUHEAT Mesh Self-Adhesive Electric Floor Heating Solution Instruction Manual

NVent NUHEAT Mesh Self-Adhesive Electric Floor Heating Solution

PRE-INSTALLATION

Assemble required tools

1. Multimeter/ohmmeter
2. Scissors
3. Self-leveling compound (recommended) or latex-modified thin-set
4. Thinset mixer
5. Large bucket
6. Sponge
7. Duct tape
8. Thermostat sensor probe

Perform insulation & resistance tests

Refer to page 8  for insulation and resistance testing procedures.

Clean subfloor

For concrete slab subfloors, we recommend insulating the slab prior to installing Mesh. Insulation will improve the upward heat transfer from the mat to the flooring surface and improve heat up time.

Route cold lead path

Route a path for the cold lead from the electrical box to the location in the room where the mesh installation will start.
Tip: It may be easier to start the mesh installation from a corner of the room. If necessary, separate some of the heating wire from the mesh to allow the cold lead to reach the electrical box. Ensure ONLY the cold lead (black) extends from the floor to the electrical box.

Layout and secure Mesh onto the subfloor

Roll Mesh onto the subfloor with the wire side down. Press the adhesive mesh onto the subfloor so that the mesh holds the heating wire down to the subfloor. Roll Mesh out to fit the contours of the room.

Cut and turn Mesh (if necessary)

To make a turn, cut the mesh material with scissors being careful not to cut/damage the heating wire. Then align the mesh roll in the desired direction ensuring the wire side faces down.
Tip: Do not flip the mesh. The wire side has more adhesive and needs to face down to hold the wire down to the subfloor.

A separate heating wire from Mesh (if necessary)

Remove the heating wire from the mesh entirely to maintain heating coverage in small, angled, or difficult areas (if necessary). Use small pieces of duct tape to hold the heating wire to the subfloor. Maintain at least 3 in of separation between adjacent lengths of heating wire.

A secure floor sensor probe

Refer to page 9 for sensor probe testing procedures. Duct tape the floor sensor probe on top of the Mesh. The probe’s tip should be centered between two runs of heating wire. Route the floor sensor to the electrical box location.
Note: if installing a second/spare sensor, route both sensors to the electrical box. Ensure the spare sensor is away from screw terminals or exposed wiring.
IMPORTANT: Only connect one sensor to the thermostat. Connecting both sensors will result
in incorrect temperature readings.

Perform insulation & resistance tests

Refer to page 8 for insulation and resistance testing procedures.

Embed Mesh in mortar

Prepare the self-leveling compound (recommended) or latex-modified thinset. Apply a minimum of 1/4 in the layer of the mortar over Mesh. Use a scraper or flat trowel to spread the mortar and ensure the heating wire is completely covered. Allow the mortar to harden before proceeding.

Perform insulation & resistance tests

Refer to page 8  for insulation and resistance testing procedures.

Install flooring

Proceed with laying the floor covering (tile, stone, laminate, engineered wood, or luxury vinyl) as per the manufacturer’s instructions.

Make electrical connections

Make electrical connections. Refer to page 10 for electrical connection procedures. Before activating Mesh, ensure the setting compound has fully cured. Refer to setting compound manufacturer’s specifications for cure times. Installation of Mesh is now complete.

INSULATION & RESISTANCE TESTING/MESH RESISTANCE LOG

Note: Mesh must be tested before, during, and after installation to validate the warranty.

Insulation Test

To ensure the heating wire is fully insulated:

1. With a digital multimeter, set it to measure resistance/ohms. If using an ohmmeter, set it to the 200-ohm setting.
2. Place one multimeter clip on the metal braid wire (ground). Place the other multimeter clip on the white wire(red wire for 240 V Mesh).
3. Confirm the reading on the multimeter/ohmmeter is OL or infinity (open circuit).
4. Repeat steps 2-3 to check the reading between the metal braid wire (ground) and the other wire (black). If insulation test readings do not pass requirements at any point of the installation, halt installation immediately and contact nVent NUHEAT Customer Care at 1.800.778.WARM(9276) or email res.customercare@nvent.com.

Resistance Test

To ensure continuity of the heating wire:

1. With a digital multimeter, set it to measure resistance/ohms. If using an ohmmeter, set it to the 200-ohm setting.
2. Place one multimeter clip on the white wire (red wire for 240 V Mesh). Place the other multimeter clip on the black wire.
3. Confirm the reading on the multimeter/ohmmeter is within +10% / -5% of the factory resistance reading listed on the white tag that is attached to the cold lead. The white tag contains information including factory resistance readings, model number, manufacture date, and amperage ratings.
4. Record the resistance test readings in the table below.
5. If resistance test readings do not pass requirements at any point of the installation, halt installation immediately and contact nVent NUHEAT Customer Care at 1.800.778.WARM(9276) or email res.customercare@nvent.com. For warranty and troubleshooting purposes, the resistance table must be completed and remain with the end-user.

MESH RESISTANCE LOG

• Mesh Model Number
• Factory Measured Resistance
• Resistance Test Ohms Reading (Test #1 – Before Installation)
• Resistance Test Ohms Reading (Test #2 – During Installation)
• Resistance Test Ohms Reading (Test #3 – Post Installation)

Testing Floor Sensor Probe Test

To ensure the floor sensor probe is not damaged:

1. With a digital multimeter (or ohmmeter), set the device to the 20KΩ (Kilohms) setting.
   Note: Some multimeters do not have the 20KΩ (Kilohms) setting. Find a suitable multimeter that has this setting.

2. Place a multimeter clip on each of the wires. It does not matter which clip is attached to which wire.

3. Confirm the reading on the device is between 8-12KΩ (Kilohms) at room temperature.

4. If test readings do not pass requirements at any point of the installation, halt installation immediately and contact nVent NUHEAT Customer Care at 1.800.778.WARM(9276) or email res.customercare@nvent.com.

ELECTRICAL CONNECTIONS

ELECTRICAL CONNECTIONS MUST BE MADE BY A CERTIFIED ELECTRICIAN TO VALIDATE THE WARRANTY.

All wiring must follow specifications set out in the Canadian Electrical Code Part 1 or the National Electrical Code ( US ) whichever is applicable and local electrical inspection regulations and authorities. Mesh should be connected to a dedicated electrical circuit. Mesh must be connected to the electrical service through a Class “A” Ground Fault Circuit Interrupter ( GFCI ) or a GFCI circuit breaker. The supply leads of the Mesh must be routed inside a suitable conduit unless local electrical codes state otherwise. Check with the local authority having jurisdiction to determine requirements.
Refer to the thermostat installation instructions ( included with the thermostat ) for complete wiring instructions. The thermostats should be installed at an appropriate height and in an accessible location in the same room that the thermostat is controlling. All thermostats must be UL Listed and/or CSA C/US Approved devices.

• A floor-sensing probe is included with each nVent NUHEAT thermostat.
• nVent NUHEAT thermostats are equipped with Class “A” GFCI protection.

1. Pull the lead-wires into the electrical connection box via a suitable conduit.
   • The electrical rating label must be fixed to the cold lead and visible at the terminal junction box. Removing the label will automatically void the warranty.
2. Secure Mesh to the box connector hub and install a protective nail plate to cover the sill plate hole.
3. Connect the metal braid wire ( ground ) to the electrical box ground screw or ground copper conductor wire.
4. Attach the corresponding lead wires to the junction box using CSA Certified / UL Listed cable fittings. The ‘line’ wire is identified by yellow/white or red color. The Mesh System must be connected using minimum of 14 AWG supply conductors. Supply conductors shall be suitable for residential wiring according to local and national electrical codes.

ELECTRICAL GUIDELINES

• The installation of this heating product shall be in accordance with the manufacturer’s instructions and in accordance with the Canadian Electrical Code Part 1 or the National Electrical Code (US) whichever is applicable, and as permitted by the Authority Having Jurisdiction (AHJ).
• This equipment shall be installed only by qualified personnel who are familiar with the construction and operation of the apparatus and risks involved.
• Caution should be taken to guard against the risk of electric shock, fire, and bodily injury during the installation of this equipment.
• Mesh should be connected to a dedicated electrical circuit.
• It is mandatory to install a Class “A” GFCI or GFCI circuit breaker with each nVent NUHEAT installation.
• nVent NUHEAT thermostats are equipped with Class “A” GFCI protection.
• De-energize power circuits before installation or servicing.
• DO NOT USE sharp tools or power tools to clean grout lines.
• Indicate on the electrical panel which circuit is used for the Mesh System.
• Subfloor must be prepared in accordance with ANSI specifications.
• The heating wire cannot be overlapped, crossed, cut, shortened or modified.
• The entire heating wire of the Mesh & mechanical joint must be secured to the floor and covered with self-leveling compound or thin-set mortar.
• The heating wire should be spaced at least 0.5 in (13 mm) from any exposed combustible surface and should never be installed in/on/under walls or in closets.
• For concrete slab subfloors, we recommend insulating the slab prior to installing Mesh. Insulation will improve the upward heat transfer from the cable to the flooring surface.
• The Mesh System should never be installed over an expansion joint.
• The ambient air temperature must be above 10°C or 50°F when the Mesh System is installed.
• Mesh is intended for indoor embedded floor heating applications (-X) as well as in general use and wet locations (-W) in Canada and US.
• The minimum spacing between runs of heating wire is 3 in.
• The minimum bending radius of the heating wire is 0.5 in (12 mm).
• Keep ends of heating devices & kit components dry before and during installation.
• The sheath of this device shall not be utilized as a grounding conductor, but must be bonded to the ground.
• Mesh is not for installation in pool and spa areas, nor outdoor use.
• The total combined R-value of all floor covering layers installed over Mesh must not exceed R-1.5.

THERMOSTATS & WARRANTY INFORMATION

nVent NUHEAT Signature WiFi – Enabled Floor Heating Thermostat

• WiFi-enabled
• 3.5 in Color touchscreen
• Energy usage monitor
• 7-day programmability
• Dual-voltage (120 V & 240 V)

nVent NUHEAT Home Universal Floor Heating Thermostat

• 3.5 in Color touchscreen
• Energy usage monitor
• 7-day programmability
• Dual-voltage (120 V & 240 V)

nVent NUHEAT Element Non-programmable Thermostat

• Manual temperature control
• Dual-voltage (120 V & 240 V)

Warranty Information

To register your product and view general product information and documentation, direct your Web browser to: nVent.com/NUHEAT. All nVent NUHEAT Floor Heating Systems are covered by a 25-Year warranty. nVent NUHEAT Thermostats are covered by a 3-Year warranty.

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