nVent H59572 NUHEAT Mat Sense Pro Electric Fault Indicator Instruction Manual

nVent NUHEAT Mat
Installation Instructions

PRE-INSTALLATION

1. Assemble required tools

1. Multimeter /ohmmeter
2. 1/4 in x 1/4 in square notched trowel
3. Grouting float /  lightweight roller
4. Sponge
5. Latex-modified thinset
6. Thinset mixer
7. Large bucket
8. Duct tape
9. Thermostat sensor probe

4. Dry fit and route cold lead path
Position Mat to fit contours of room. Route a path for the
cold lead to the electrical box. The cold lead CANNOT
cross over on top of Mat.
Standard Mats can be flipped in any direction to place cold
leads closer to thermostat location.

Refer to page 9  for insulation and resistance testing procedures.

3. Clean subfloor

For concrete slab subfloors, nVent NUHEAT recommends insulating the slab prior to installing Mat. Insulation will improve the upward heat transfer  from the mat to the flooring surface and improve heat up time.

4. Dry fit and route cold lead path

Position Mat to fit contours of room. Route a path for the cold lead to the electrical box. The cold lead CANNOT cross over on top of Mat.
Standard  Mats can be flipped in any direction to place cold leads closer to thermostat location.

SECURE MAT TO SUBFLOOR

5. Prepare thinset mixture

6. Spread thinset onto subfloor
Use 1/4 in x 1/4 in square notched trowel to spread 1/4 in layer of acrylic /latex-modified thin-set onto subfloor. Work on one manageable section at a time. For Mat installations in showers or wet locations, spread thinset onto sloped mortar bed above PVC (polyvinyl) pan liners.

7. Place mat onto thinset
Place Mat onto fresh thinset.

8. Press mat into thinset
Press Mat firmly into thinset with grout float or lightweight roller. Create 100% contact between Mat, thinset, and subfloor. Press out air bubbles underneath mat. Route cold lead(s) to electrical box as per step 4.

9. Perform insulation & resistance tests
Refer to page 9  for insulation and resistance testing procedures.

10. Secure floor sensor probe
Refer to page 10  for sensor probe testing procedures.
Duct tape the floor sensor probe on top of Mat. The probe’s tip should be between the heating wires. Ensure the probe’s tip is located in an area that can represent the overall floor temperature and away from other heating/cooling sources (i.e. heat vents, direct sunlight, drafts caused by large windows/doors, areas covered by rugs, or fixed furniture). The probe wire CAN cross on top of the heating wire(s).
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.

INSTALL FLOORING – TILE AND STONE

11. Install tile/stone flooring
For laminate, engineered wood, or luxury vinyl installations, skip to page 8.
Use 1/4 in x 1/4 in square notched trowel to spread minimum 1/4 in layer of acrylic/latex modified thinset on top of Mat. Install tile/stone on top of Mat as per manufacturer’s instructions.

12. Clean grout lines
Do not use sharp tools or power tools to clean grout lines; doing so may damage Mat.

13 Perform insulation & resistance tests
Refer to page 9  for insulation and resistance testing procedures.

14. Make electrical connections
Make electrical connections. Refer to page 11 for electrical connection procedures.
Before activating Mat, ensure setting compound has fully cured. Refer to setting compound manufacturer’s specifications for cure times. Installation of Mat is now complete.

INSTALL FLOORING – LAMINATE, ENGINEERED WOOD, OR LUXURY VINYL

*11. Apply smooth layer of thinset**
Use smooth trowel to spread minimum 1/4 in a layer of acrylic / latex-modified thinset on top of Mat. Ensure thinset layer is level and smooth. Self-leveling compounds may also be used. Allow thinset or self-leveller to cure as per manufacturer’s instructions.

*12. Perform insulation & resistance tests**
Refer to page 9 for insulation and resistance testing procedures.

*13. Install laminate, engineered wood or luxury vinyl flooring**
Install laminate, engineered wood or luxury vinyl floor as per manufacturer’s instructions.

• This step is for laminate, engineered wood, or luxury vinyl flooring only.
  *14. Make electrical connections**
  Make electrical connections. Refer to page 11 for electrical connection procedures. Before activating Mat, ensure setting compound has fully cured. Refer to setting compound manufacturers’ specifications for cure times. Installation of Mat is now complete.

INSULATION & RESISTANCE TESTING/MAT RESISTANCE LOG

Note: Mat 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 Mats).
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 Mats). 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.

MAT RESISTANCE LOG

Mat 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)

INSULATION & RESISTANCE TESTING

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

1. Connect the tin plated copper ground braid/wire of the Mat to the ground screw or ground conductor inside the electrical box using approved wire connectors.

2. Attach corresponding lead wires to electrical box using CSA Certified /UL Listed cable fittings. Make electrical connection only after flooring is complete.

3. Mat must be connected to minimum 14 AWG supply conductors. Supply conductors shall be suitable for residential wiring according to local and national electrical code.
   When controlling multiple mats with one thermostat, all mats may be connected directly to the thermostat provided the total amperage does not  exceed the 15-amp maximum load of the nVent NUHEAT thermostat. Alternatively, the mat cold leads can be run to a separate electrical box and  connected to the nVent NUHEAT thermostat using suitable electrical house wiring. Consult with your electrician to determine the best method for your installation. In all cases, ensure the electrical box can easily fit all of the connections.
   WARNING: Risk of electric shock and fire. Damage to supply conductor insulation may occur if conductors are routed less than 2 in (51 mm) from heating wire. Refer to installation instructions for recommended means of routing supply conductors.

4. Affix supplied orange label to panel board beside appropriate circuit indicating branch circuit supplying power to Mat.

5. Affix the supplied “Concealed Area Warning” label to adjacent points of access to concealed areas in which installed heating products are accessible.

6. Affix the supplied “Radiant Floor Heating” sticker to the room control for the nVent NUHEAT Floor Heating System.

All wiring must follow specifications set out in Part 1 of Canadian Electrical Code, or Article 424 of the National Electrical Code ANSI/ NFPA 70, or whichever is applicable to local electrical inspection regulations and authorities. All nVent NUHEAT thermostat are equipped with built-in Class “A” GFCI protection. If Mat is connected directly to a nVent NUHEAT thermostat, a non-GFCI equipped breaker should be used. If the Mat is controlling an external relay for a separate circuit, it is mandatory to install a Class “A” GFCI or GFCI circuit breaker for the external/separate circuit.

The cold leads of Mat may need to be routed inside suitable conduit according to local electrical codes. Check with the local authority having jurisdiction to determine requirements.
WARNING: NEC /CEC rules state that the cold lead tag must remain on the cold lead. The tag contains critical information necessary for testing, warranty and troubleshooting purposes. Do not remove the tag for any reason.

ELECTRICAL GUIDELINES

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 (USA), whichever is applicable.
• 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 electric shock, fire and bodily injury during the installation of this equipment.
• De-energize power circuits before installation or servicing.
• Mat should not be connected to power until the Mat is fully installed and covered by flooring material.
• Subfloor must be prepared in accordance with ANSI specifications.
• The heating portion of the Mat shall not touch, cross over, or overlap itself.
• Do not install Mat in direct contact with any combustible surfaces or material.
• The minimum bending radius of the cold lead is 2 in (51 mm) and heating wire is 0.625 in (16 mm).
• The ambient air temperature must be above 10°C or 50°F when Mat is installed.
• As per the National Electrical Code (USA) and Canadian Electrical Code (CAN), Mat must be installed on a circuit dedicated for heating appliances/devices (additional Mats, baseboard heaters, electric fireplaces, etc.).
• Mat is designed for indoor embedded floor heating applications (-X) and in wet (-W) areas in Canada and US.
• Mat should be installed a minimum of 2 in (51 mm) away from walls.
• Minimum distance of 1.5 in (38.1 mm) between adjacent heating devices.
• Total combined R-values of all floor coverings must not exceed R-2.5 for 12 W/ft 2 (standard wattage) and R-1 for custom requested 15 W/ft 2 Mats.
• Mat should not be altered.
• Mat is not for installation in pool and spa areas, nor outdoor use.
• Do not place objects directly on top of the floor that could impede/trap heat emanating from the floor heating system including but not limited to flush-to-floor furniture, rubber or memory foam mats, and mattresses. These objects could cause unsafe temperatures to be reached underneath these objects which may cause damage to the object and/or the flooring material.

Troubleshooting
Should you have any questions or difficulties installing or controlling your Mat, please consult our comprehensive troubleshooting FAQ section at http://www.nuheat.com/customer-care/faq/ or contact nVent NUHEAT directly at 1.800.778.WARM(9276) or email res.customercare@nvent.com.

WARRANTY INFORMATION

nVent NUHEAT offers a 25-Year Limited Product Warranty and/or 25-Year Limited Total Care* Warranty when installed by a nVent NUHEAT Certified PRO installer.
The online warranty registration form must be completed at www.nuheat.com within thirty (30) days from the date of installation and kept by the homeowner, together with a copy of the commissioning report, relevant invoice, and photographs, showing the product(s) in their entirety after installation but before the installation of the flooring material.

• Total Care Warranty is an upgrade of our standard product warranty and additionally covers repair or replacement of the Product and restoring the floor in its original state or, if not possible, to an equivalent standard, at no cost to the Buyer. In order to remedy the defect, nVent NUHEAT must have access to 1m² (10 ft²) of the floor covering material.
  For more information, please call: +1.800.778.WARM(9276) or email: res.customercare@nvent.com.

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