HEATING | FLOOR SCREED€¦ · ThermoSphere Underfloor Heating Cables are guaranteed for the...

SCREEDINSTALLATION GUIDE

HEATING | FLOOR

SCREED

Excellence in heating solutions.

[email protected] 0800 019 58992

Thank you for your purchase...This document will provide a step-by-step guide to a perfect installation as well as details on the warranty and how to get Technical Support should you need it.

To ensure a safe, hassle-free installation to be proud of please take the time to read this guide in full before you start.

This product is covered by a Lifetime warranty, subject to terms and conditions. Be sure to keep the receipt as proof of purchase, this will be required to validate your Lifetime warranty.

Please complete the Customer Handover section on page 11 in full so that the customer has all the information they need to complete the online warranty form and register their ThermoSphere Lifetime Warranty.

If you have any questions about your ThermoSphere Underfloor Heating or any of our other products call our Technical Support team on 0800 019 5899.

Warranty terms & conditionsThe ThermoSphere Lifetime Warranty guarantees ThermoSphere Underfloor Heating Cable to remain free from defects in workmanship and materials under normal use and maintenance, and is guaranteed to remain in full working order subject to the conditions and limitations below:

ThermoSphere Underfloor Heating Cables are guaranteed for the Lifetime of the floor covering under which it is originally fitted subject to the following conditions. Please pay attention to the exclusions listed at the end of this guarantee.

ThermoSphere Lifetime Guarantee applies:

1. Only if the product is registered, and the registration information is received and documented by ThermoSphere, within 60 Days after purchase. You can register your product by completing the form online at www.thermosphere.com. Proof of purchase must be presented to make a claim, so please ensure that you keep a copy of both your invoice and purchase receipt in a safe place. Such invoice/receipt should clearly state the model that has been purchased and be in legible condition so as to aid in identifying the system; and

2. Only if the ThermoSphere Underfloor Heating Cable has been properly earthed and protected by a Residual Current Device (RCD) at all times.

This guarantee does not cover any thermostats as these are covered by a separate 3 year warranty from the date of purchase.

All Thermogroup Ltd warranties become void if the floor covering under which the ThermoSphere Underfloor Heating Cable is originally fitted is damaged, lifted, replaced, repaired or covered with additional layers of flooring. The ThermoSphere Lifetime Warranty does not cover accidental damage, including but not limited to damage caused by lifting, replacing, repairing the original covering laid after installation.

The guarantee period starts on the date of purchase but the registration is only confirmed only when a letter or email of confirmation is sent by Thermogroup Ltd.

Should it be required, ThermoSphere will arrange for the heating element to be repaired or (at the discretion of Thermogroup Ltd) have parts replaced free of charge. The cost of repair will only cover the cost of replacement Thermogroup Ltd parts and/or repair to damaged Thermogroup Ltd parts and products. Any damage to floor coverings or floors, costs of re-laying or repairing floors or floor coverings are not covered by the ThermoSphere lifetime guarantee.

Please Note: Full Terms and Conditions are available on request.

Email [email protected] to request your copy or give us a call.

Find us on social media and share your installation photos!

www.thermosphere.com 0800 019 5899 3

Contents

Warnings Electrical regulations and important information 4

Preparation Resistance testing 5

Planning Layout and calculations 6

Installation Fixing methods 7

Installation First fix 8

Installation Perimeter insulation and cable 9

Installation Final connections 10

Finalise Compulsory customer handover form 11


IMPORTANT SAFETY REGULATIONS

ALL WIRING MUST CONFORM TO THE LATEST IET WIRING REGULATIONSThermoSphere underfloor heating cables and mats are CE approved, certified and manufactured to the highest standards using state of the art Fluoropolymer coated cables. All our cables and mats are designed to be Part P compliant and the instructions we supply with them include as much

information as possible to ensure that all installations comply with them. Please call our freephone customer care line if in any doubt on 0800 019 5899.

Insulation should be in place before you start this installation. ThermoSphere screed cable is to be used with a cementitious screed. 50mm of screed is the minimum thickness and your ThermoSphere cable must be at least 30mm beneath the top of the screed. Depending on the construction of your substrate, you may need to provide additional insulation.

A suitable 230V electrical mains supply is essential to the installation of this product. This mains supply should be fitted with an adequate RCD. This supplies power to a thermostat, so feed the mains cable to a back box where you want your thermostat positioned. The cold tail of your screed cable is 3m long with live, neutral and earth wires that connect to your thermostat and back box (earth only). If circuit exceeds 16A install a contactor/ snubber, refer to relevant installation guide.

Do Ensure sensor conduit is positioned between 2 runs of heating cable in a representative area of the floor

Take care to ensure all insulation joins are as flush as possible, using reinforcing tape if necessary

Take care to ensure all electrical work complies with the latest IET regulations

Locate the thermostat in accordance with current guidelines

Read this document in conjunction with instructions for associated accessories (eg thermostats)

Ensure test procedures a, b & c are carried out and recorded. This is essential for completion of the warranty

Install conduit to facilitate replacement of the sensor probe if required

Use primer before self levelling compound or tile adhesive if the manufacturer recommends it

Protect heating cables during installation, as this is when it is most prone to damage

Do not Cut or shorten the yellow cable!

Position conduit near pipes or doorways

Lay insulation on top of underfloor heating (ufh) or a dusty substrate. Insulation on top of ufh will reflect all the heat emitted back into the substrate

Position temperature sensor near hot pipes or temperature influences

Cross or overlap heating cables

Wire multiple heating cables in series

Strain or bend the cold tail end connections

Turn on system until screed, adhesive or levelling compound is fully cured

Do not place anything over the floor covering that has a tog rating higher than 2.5.

Do not place bean bags, fixed furniture, cushions, pet beds, mattresses or any insulating material over the heated floor covering.


Planning: Screed cable formation options

This section will show you the nature of a screed installation, helping you to understand and plan your installation in the next section. The screed fixing profile normally span the width of your installation. This will not always be possible when dealing with irregular rooms. The section below highlights some common cable formations. If you cannot see a solution to your installation here please call our customer help line (0800 019 5899).

Meander the cable the width of your installation area in one run without returning the cable.

Extend each run with the installation as it widens laying a new fixing profile with each new area.

Install as normal and use smaller sections of fixing profile to se-cure the cable where required.

Install as normal and use smaller sections of fixing profile to se-cure the cable where required.

Cable formation: Solutions for common and irregular areas

Standard areas Staggered areas Angled areas Avoiding obstacles

Take care to avoid walking on exposed cable with hard footwear

Do not install heating cable under furniture or permanent fixtures

Checklist:

Understand full test procedure

Conduct Test A and record results on p11

Understand irregular areas

Important safety precautions

Three test symbolsBe sure to check the electrical resistance reading on the cable three times; before, during and after the installation process. These test symbols throughout this guide are a reminder:

Resistance testTest Live and Neutral, conducting the test in this way ensures total accuracy.

Record results Write each resistance value on the customer handover form (P11) to ensure your customer can complete the warranty form online.

A B C

A

B

C

A

B C

Perform Test A now and record the results on p11

Preparation: Performing a resistance test


Use the grid above to plan your installation. This will help you to produce the safest, quickest and cleanest result with as little wastage as possible.

Measure your room, if you don‘t already know the dimensions, and make a note of the available floor space excluding any obstacles or fixtures you might have such as sanitary ware, furniture or drainage. Use the grid to plan your installation layout making sure to include thermostat and sensor position.

Correct spacing is essential. Ensure screed cable is spaced evenly at least 50mm apart. The fixing profile also needs equal spacing at approx 750mm.

Planning: Layout & cable spacing

Load calculations: If the total load of your system is over 16A you will need to have a contactor/snubber installed by a Part P qualified electrician. Call our technical help line if you have any questions (0800 019 5899).

Example calculation:

Allow between 90 - 150w/m2 based on

available floor space to calculate cable

spacing.

See below:

Heated area:

Output required:

Total output:

Stock number:

Cable spacing:

9m x 3.5m = 31.5m2

31.5m2 x 100w/m2 = 3150W

SC-183-3300 3300W 183Lm

100 w/m2 (new build application)

31.5 x 100183

= 17.2cm spacing

Available floor space x 100Cable length (m)

= spacing (cm)

• Fixing profile• Screed Cable• Thermostat• Sensor and Conduit• Perimeter Insulation

Items to plan for:

Example

Planning: Layout and calculations

Planning checklist

Calculate available floor space and cable spacing

Sketch plan including all required products

Contactor/ snubber in place if required

Sensor and conduit must be positioned inbetween 2 runs of heating cable

Do not position sensor & conduit near water pipes or any other temperature influence

The electrical supply must always be protected by an RCD. Ensure this is catered for before installation



Installation: Cable fixing methods

ThermoSphere screed cable is a robust cable designed for installation in the concrete slab or screed.

Install fixing profile at equal spacing across the floor. Recommended spacing for fixing profile is 750mm.

Note: The blue strip on the diagram above represents perimeter expansion foam.

When installing over foil faced insulation you can use cable staples to fix the heating cable in position.

Fix staples at the ends of cable runs first and then secure the cable in place with a staple every 25cm.

Option 1: Fixing profile Option 2: Cable staples

Recommended spacing for fixing profile 75cm.

Recommended spacing for staples 25cm.

Minimum cable spacing 50mm.

Step 1 & 2 checklist

Ensure the heating cable is secured in place with a recommended fixing method in line with the instructions

Ensure desired floor finish is compatible with underfloor heating


Floor finish Floor finishFixing profile Staples

Screed ScreedFoil faced insulation Foil faced insulation

ThermoSphere screedheating cable

ThermoSphere screedheating cable

Concrete substrate Concrete substrate

1 1

6 6

5 5

4 4

2 2

1 1

3 3

4 4

2 25 5

3 36 6

OR

Compatible floor finishes:

Ceramic tiles

Porcelain tiles

Natural stone tiles

Marble and slate tiles

Engineered laminate floor

Carpet

Vinyl & cork

Karndean and Amtico

Resin safety floors


Perform Test B now and record the results on p11

Installation: First fix

Here are the required items that should be installed before beginning the next step.

Using the load (amps) calculated earlier specify a fused spur for your system. For up to a 16A system install as shown above. For areas over 16A use a contactor/snubber. Please refer to the contactor/snubber installation guide.

Extra deep single gang back box

Sensor probe conduit

Cold tail conduit

Fused spur or marshalling box (shown) position

Foil faced insulation.

Step 1: First fix requirements

Your fixing strips should be laid at a right angle to your Screed cable and spaced in intervals approx 750mm apart.

Step 2: Lay fixing profile

1

1

2

3

4

5

The sensor probe is supplied with 3m of connection cable. The ideal thermostat height is 1.3m from the floor. This will ensure your sensor connection cable can be connected easily.

Allow a 100mm space from the edge of your fixing profile to the wall. Perimeter insulation will be installed here to allow for expansion and contraction within the heating system.

Position your sensor probe conduit directly between two loops of heating cable. This will provide accurate temperature reading and allow for a more efficient system.

PRO TIP

PRO TIP

PRO TIP

1 2

2

3

4

5


Conduct Test B and record results on p11

Install all first fix requirements

Lay fixing profile with even spacing between runs

Position sensor probe conduit correctly

It is important to check for other heat sources such as central heating pipes or recessed down lighters below the floor as this can alter readings

Take care to avoid walking on exposed cables with hard footwear

The sensor wire must not cross or touch any heating wires. Also the sensor must be placed in conduit to facilitate removal


A B C

A B C


Starting from a corner begin to roll your insulation around the perimeter of your room. Also insulate all pipes and fixed obstacles.

This allows the screed to expand and contract when heated. Failure to allow for this expansion could result in a breakage in the screed.

Step 4: Perimeter insulation

Installation: Installing cable and perimeter insulation foam

Starting from the proposed or existing position of your thermostat begin to meander your screed cable. The cable should run up and down the room at 90o to the fixing profile. It is essential to have an even (50mm minimum) spacing between each run of cable to avoid uneven distribution of heat.

Step 3: Lay cable from the Thermostat position

Fixing profiles: How to lock screed cable in place

3 4


Lay screed cable starting at thermostat position

Screed cable should be laid at 90o to fixing profile

Install perimeter insulation correctlty

Understand how to lock cable in place

Do not switch on whilst rolled up. You do not need a current to test the resistance

Take care not to damage the heating cable in any way

Install perimeter insulation to allow for adequate expansion and contraction within the screed


1 2 3 4


Step 5: Screeding your system Step 6: Installing your Thermostat

Installation: Final connections

You can simply screed directly over the screed heating cable but take extra care not to damage the yellow cable in any way. Screed over the floor in accordance with industry standards and manufacturer guidelines.

Allow the screed to fully cure before switching your new ThermoSphere system on.

ThermoSphere controls must be installed by a qualified electrician in accordance with all applicable safety regulations. The electrical wiring must conform to the latest revision of the latest local wiring regulations.

We recommend installing the thermostat into flush mounted plastic electrical box.

The diagram shows the connections to the ThermoSphere SmartHome Control only for illustrative purposes. Check your thermostat installation guide for accurate wiring digrams.

Perform Test C now and record the results on p11

5 6

The heating may be slow to react at first, especially if installed on a new screed floor or in a new building. Start by setting the floor temperature at approx 18°C and build up by 1°C per day until your desired temperature is reached. Use an automatic cable stripper to ensure a good amount

of cable is exposed to ensure a safe connection.

PRO TIP

PRO TIP

Final connections checklist

Do not turn on before screed is fully cured!

Wire thermostat to an RCD

Final connections correct according to relevant wiring diagram

Install thermostat securely to back box

Diagrams above are for illustrative purposes only

Consult wiring diagram in relevant thermostat installation guide


9

www.thermosphere.com

N1 N

230VAC

Max Load 16A

L L1 S S

Sensor(No Polarity)

IP21

A B C

A B C


Finalise: Test results & customer handoverINSTALLER: The installer must complete the full test procedure and complete this page in full andgive it to the home owner to keep in case of a warranty claim.

HOME OWNER: Use this information to register your Lifetime Warranty at www.thermosphere.com.You must also keep this document for your records in case of a warranty claim.

Stock No Manufacturer‘s Values

Before installation After cableinstallation

After screed installation

Resistance measurement of the electric heating cable

Two conductors and earth braid continuity test

Infinity (I) orOverload (OL)

Floor temperature sensor test

Installer details

Name:

Company

Email:

Phone:

Address:

Postcode:

Part P number:

Date:

Signature:

Thermogroup LtdBridge House

Pattenden LaneMarden

TN12 9QJ

E&OE © Thermogroup Ltd 2019

0800 019 [email protected]

Stock Code Description Length (m) Output (W) Resistance (�)

SC-011-0200 Screed Cable 200W 11.0 200 264.5

SC-016-0300 Screed Cable 300W 16.5 300 176.3

SC-022-0400 Screed Cable 400W 22.0 400 132.2

SC-027-0500 Screed Cable 500W 27.5 500 105.8

SC-033-0600 Screed Cable 600W 33.0 600 88.2

SC-039-0700 Screed Cable 700W 39.0 700 75.6

SC-045-0850 Screed Cable 850W 45.0 850 62.2

SC-055-1000 Screed Cable 1000W 55.0 1000 52.9

SC-069-1250 Screed Cable 1250W 69.0 1250 42.3

SC-076-1375 Screed Cable 1375W 76.0 1375 38.5

SC-094-1700 Screed Cable 1700W 94.0 1700 31.1

SC-116-2100 Screed Cable 2100W 116.0 2100 25.2

SC-144-2600 Screed Cable 2600W 144.0 2600 20.4

SC-183-3300 Screed Cable 3300W 183.0 3300 16.0

Installation accessories

ThermoSphere screed heating cable

Stock Code Description Size Unit

SC-STA-0600 Plastic Cable Staple 8mm (4 per lm) Pk 600

SC-STG Tacker Gun Ea

SC-GFP-025 Screed Cable Fixing Profile 20mm x 25m Roll

PIF-80-050 Perimeter Insulation Foam 5mm x 80mm x 50m Roll

SCM-W-01 Manual Thermostat

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