I-WARM Heating Mats. Contents

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2 Contents 1. General System application System delivery kit Heating mats Thermostats Preparation for Installation Location of heating mat Electric wiring and location of thermostat Heating System Installation Turning the System on and Operation Hints and Notes Your Safety Warranty Certificate Appendix Expansion joints Thermal insulation I-WARM heating mat specifications Instructions on preparation and application of tile adhesive for installation of underfloor heating mats

3 Thank you for choosing ultra-thin I-WARM underfloor mat heating system manufactured by «Special Systems and Technologies» Company. We are happy to offer you this product which will meet your expectations and bring comfort to your home. 1 General This installation manual contains instructions for installation and connection of I-WARM heating system. Please, carefully read this manual before commencing installation. Make sure that chosen system is suitable for your premise and the size of the area to be covered. Please note that incorrect installation could damage the system, if all instructions are followed, no problems should arise. It is strongly recommended to use a qualified installer. 2 System application Ultra-thin I-WARM underfloor heating system is an electrical cable system on the basis of heating mat for heat retaining creation. It doesn't require the installation of a screed, because it can be easily laid into thin undertile adhesive layer. It is applicable for all types of premises and can be easily installed both on a new surface or on the existing floor in case of repair works, especially when it is highly important to keep low thickness of floor construction or in the premises with low ceilings. Ultra-thin I-WARM underfloor heating system is used as comfort heating system in the premises with main heating system installed. 3 System delivery kit I-WARM underfloor heating kit includes: single-conductor MH pp-ss heating mat, where pp stands for rated power in Watts, and ss stands for mat square, m 2, or double-conductor MHH pp-ss heating mat where pp stands for rated power in Watts, and ss stands for mat square, m 2 ; thermostat with temperature probe; corrugated tube for temperature probe placement (1,5m long). Technical descriptions, wiring diagrams and warranty liabilities of heating mats and thermostats are given in passports. 2

4 I WARM Heating Mats double conductor heating mat thermostat * single conductor heating mat temperature probe corrugated tube * is stocked with one of the thermostats given at Paragraph Heating mats MH single conductor heating mat (I WARM Mini) Single conductor heating mat is made of a shielded one-core cable, fixed on the fiber mesh. Both ends of the heat ing section are fitted up with installation wires and reliable coupling which passed factory testing. To differentiate mats according to space and power output types various cable sheath colors and markings are used. Specifications of heating mats are given in the Appendix (please, refer to paragraph 10.3). MH heating mat is manufactured and tested in full accordance with IEC (Inter national Electrotechnical Commission) Global Quality Standards. High reliability of mats is ensured by ultra-thin screened cables with diminished effect (linear power), which are fixed on the mesh with constant wire spacings. Rated linear power of cables used in mats is lower than in standard cables used for under floor heating but power output of each square meter of heating mat is about 140 W that ensures highly uniform and efficient heating. warm.com 3

5 Сonnection of MH heating mat MH MN heating mat Coupling muff Installation wire (cold lead) Braided shield Thermostat control circuit Temperature probe Thermostat terminal blocks Power supply 230/240 VAC Grounding loop or Neutral conductor Thanks to the cable fixation on the mesh there is no need to adjust the wire spacings and to fix the cable on the floor surface which can by chance lead to the damage of the wire during the process of installation. I-WARM mats are produced out of high-quality materials provided by world leading plastic manufacturers. Reliability and safety of heating mats is approved by the Russian Certificate of Conformance, Fire-safety certificate and Hygiene Certificate. MH heating mat consists of heating cable, two couplings and installation wires. Heating conductor and screen are securely connected with two installation wires, which are designed to connect heating section to thermostat and protective earthing. For correct MH mat connection, please, pay attention to coloring of installation wires. White installation wires are connected to heating conductor and are to be connected to the thermostat. Braided shield is to be connected to the earth loop of the building (or to zero wire of power network). MHH double-conductor heating mat (I-WARM Tropics) Double-conductor heating mat is made of a shielded twin-core cable, fixed on the fiber mesh. One end of the heating section are fitted up with cold lead and reliable coupling which passed factory testing and sealing end. To differentiate mats according to space and power output types various cable sheath colors and markings are used. Specifications of heating mats are given in the Appendix (please, refer to paragraph 10.3). 4

6 Сonnection of MHH heating mat MHH MNN heating mat Coupling muff Installation wire (cold lead) Termination muff Thermostat control circuit Temperature probe Thermostat terminal blocks Power supply 230/240 VAC Grounding loop or Neutral conductor MHH heating mat is manufactured and tested in full accordance with IEC (International Electrotechnical Commission) Global Quality Standards. High reliability of mats is ensured by ultra-thin screened cables with diminished effect (linear power), which are fixed on the mesh with constant wire spacings. Rated linear power of cables used in mats is lower than in standard cables used for underfloor heating but power output of each square meter of heating mat is about 140 W that ensures highly uniform and efficient heating. Thanks to the cable fixation on the mesh there is no need to adjust the wire spacings and to fix the cable on the floor surface which can by chance lead to the damage of the wire during the process of installation. I-WARM mats are produced out of high-quality materials provided by world leading plastic manufacturers. Reliability and safety of heating mats is approved by the Russian Certificate of Conformance, Fire-safety certificate and Hygiene Certificate. MHH heating mat consists of double-conductor heating cable, one coupling, installation wires and sealing end. Heating conductor and screen are reliably connected with two installation wires, which are designed to connect heating section to thermostat and protective earthing. For correct MHH mat connection, please, pay attention to coloring of cold leads. Blue and brown installation wires are connected with heating conductor and are to be connected to the thermostat. Ground bus is to be connected to the earth loop of the building (or to zero wire of power network). 5

7 3.2 Thermostats Thermostat is an energy saving device which automatically turns the heating system on and off. It applies voltage to heating section only when it is necessary to maintain desired temperature of the system for creating comfortable ambient of your accommodation. Using programmable thermostat you can set the device to maintain comfort temperature during twenty-four hours or a week period. All SST thermostats are stocked with temperature probe heating resistor installed in the floor. Roomstat 110 The most popular thermostat model. It has modern design, lower weight and smaller dimensions. It has a separate power switch. The thermostat is supplied with LED indication of the heating system «ON» state. The device can be placed in multisocket wall mounted frame. Provides energy saving up to 30%. Roomstat thermostat has a maximum load current of 16 amps. I WARM 710 Room thermostat with two temperature sensors remote floor temperature sensor and built-in air temperature sensor. It is flush mounted. This thermostat is designed for constant maintenance of the preset temperature using floor temperature sensor. Large-screen backlit graphical display, three control buttons. User-friendly «intuitive» «one-touch» interface. Indication of current floor temperature, set temperature, ON/OFF heater condition. Self-diagnostic of heating system with warning caption output. An additional mode allows to display ambient air temperature (at that temperature control is still based on floor temperature sensor). 6

8 Additional heating control mode without temperature monitoring time unit is equal to one hour. ON/OFF time is set by user in percentage rating. The user sets the percentage 10% to 90%. Allows precise power control. I WARM 710 thermostat has a maximum load current of 16 amps. I WARM 720 Room thermostat with remote floor temperature sensor. It is flush mounted. The device allows to decrease significantly energy consumption of warm floor by maintaining comfort temperature only in the preset time intervals when it is really required by the customer. Large-screen backlit graphical display, three control buttons. User-friendly «intuitive» «one touch» interface. The built-in menu allows to control all functions of the device. Multimode thermostat with built-in real-time block and calendar. Built-in economizer. The device stores and keeps in memory all the information about the heating system that allows customer to control his expenditures not to the expense of comfort. «Intelligent» software allows to determine parameters of heat processes in the premise. The user can only settle time intervals when he needs heating and the device makes the rest by itself. The additional display features: clock, calendar. The following temperature maintenance modes can be realized: а) Constant comfort temperature maintenance. b) Daily comfort maintenance schedule. At that daily cycle of comfort temperature distribution is realized. The user sets time intervals of the day when he requires warm floor. The device adjusts itself to the premise: determines the existing heat properties and defines by itself the time when the heating system should «turn ON» to obtain the comfort temperature exactly at the set time. All the rest time the heating system is turned OFF saving the energy. This program repeats on a daily basis. c) Weekly comfort temperature maintenance schedule. Weekly temperature distribution cycle. It is similar to «daily» option but you program seven days independently and this cycle repeats each week. I WARM 720 thermostat has a maximum load current of 16 amps. 7

9 I WARM 730 Room thermostat with 2 remote floor temperature sensors and two zones control opportunity. It is flush mounted. This model maintains the set temperature in accordance with a floor temperature sensor. Large-screen backlit graphical display, three control buttons. User-friendly «intuitive» «one touch» interface. Indication of current floor temperature, set temperature, ON/OFF heater condition. Self-diagnostic of heating system with warning caption output. Additional heating control mode without temperature monitoring during each hour. ON/OFF time is set by user in percentage rating. The user sets the percentage 10% to 90%. Allows precise power control. I WARM 710 thermostat has a maximum load current of 2х8 amps. PT320 РТ320 thermostat for installation in control cabinets on standard DIN-rail. Temperature setting regulator is fed out under slot. It is used when the power of I-WARM heating system exceeds rated value of built-in relay (3 kw). For example if some premises with the same temperature conditions are heated or one large premise is heated by several heating sections. The thermostat controls circuit breakers rated at high current to which groups of heating sections are connected. PT320 thermostat has a maximum direct load current of 16 amps. * If necessary PT320 thermostat can be fitted up with air temperature sensor instead of floor temperature sensor. Safety and reliability of thermostats is approved by the Russian Certificate of Conformance and Hygiene Certificate. 8

10 4 Before the installation I-WARM Heating Mats Before I-WARM system installations please, make sure that you chose the system suitable for your premise and desired type of heating (main or comfort heating). 4.1 Heating mat placement It is recommend to lay heating sections on the subfloor area free from fixed furniture. Place heating mats in the usable area: where you walk, where heat radiation is effective. To fit mat to the heated area configuration it is necessary to cut mesh into fragments. When cutting take care not to cut or damage the heating cable. Never allow strips of mesh to overlap. Never use one and the same mat for heating different types of premises (e.g. bathroom, hallway or kitchen). It is not recommended to use the same mat for heating premises with different floor constructions. For this purpose independent mats should be installed along with the thermostats. If it is necessary to heat balcony, terrace, interior garden, premises with many windows, open doorways, archways, premises with ceilings over 4 meter high, please, consult our manager who will offer you suitable system to heat the premise required. Heating mat placement example: 1. Heating area size estimation. Estimate heating area size and pick up adequate heating mat. Adjust mat to the heating area configuration. 2. First mat mesh cutting mat turn. 4. Second mat mesh cutting. 9

11 mat flip. 6. Heating mat after installation. Please, make sure that an existing in your premise electrical wiring can power I-WARM system. Please refer to paragraph 10.3 of the present instruction to see the amperage load for I-WARM heating systems. Take into consideration additional electrical appliances which can be energized by the same circuit. Also specify amperage load of your safety devices. 4.2 Electrical wiring and thermostat placement According to Electric Installation Code (edition of 2001) standard electrical wiring withstands the following currents and appropriate power loads (table 1): It is recommended to use a separate circuit and separate safety device to power I-WARM heating systems with power over 2kW. I-WARM systems are to be connected via Ground Fault Circuit Interrupter (GFCI) which actuating rated current doesn't exceed 30 ma. This is a small device mounted on the panelboard which controls safety of your equipment thermal insulation. When mat is installed in damp premises (bathrooms, saunas, swimming pools), heating mat screen must be connected to earthing lead of supply network. To this wire must be connected all available metal parts: metal shower trays, metal frames of shower cabins, etc. Conductor material Copper Aluminium Таble 1 Cross Max. load section, current mm 2 A, Max. total load power kw, 2 x x x x x Choose thermostat location. It should be installed in the most convenient place so it will not interfere with furniture disposal. Thermostats controlling heating in damp premises (bathrooms, toilets, saunas, swimming pools) must be installed outside of such premises 10

12 5 I-WARM system installation Using this Manual you can install I-WARM heating system by yourself. We strongly recommend to entrust connection and powering to a qualified electrician. High quality installation and connection of the system ensuring its warranty period can be performed by skilled specialists. Remember that heating system durability is 99% dependent upon its installation quality. Here you will find description and illustration of ultra-thin heating mat installation process. If you need to heat a non - standard premise, please consult our manager. Step by step I-WARM heating system installation: 1. Prepare the space on the wall for thermostat mounting. 2. Chisel out channels for power supply wires, mat cold leads and temperature sensor in the wall. 3. Chisel out 20x20mm long channel in the subfloor for floor sensor with connection wire placed in the corrugated tube. 4. Subfloor preparation: the floor should be even, secure, flex-free, with appropriate bearing capacity. The surface must be dry, clean and free of grease, dust and sharp pieces. 5. Place temperature sensor into the tube, which is included in the I-WARM heating kit. The sensor must be placed inside the tube close to its end. Its connecting wire must be exposed from the opposite end of the tube. The end of the tube with the sensor must be sealed to avoid ingress of cement mortar inside. Place the tube with sensor in the chiseled channel and lead to the thermostat or to the terminal box. Tube bending radius must be 5cm minimum. When corrugated tube is affixed to the wall and the floor, make sure that the sensor floats inside the tube. For this partially pull out and then insert back sensor connection wire. This installation method allows sensor replacement without removing flooring material. Attention: The tube end with sensor connection wire should ends at terminal box or thermostat, otherwise it will be impossible to replace sensor without removing floor covering. 11

13 6. Fill in chiseled channels with tile adhesive or grout. 7. Mark out area on the subfloor where the sensor will be fitted. 10. For single-conductor mat it is necessary to put cold leads to the thermostat via channels chiseled in the wall. Make sure there are no wire breakoffs. To check the heating mat and temperature sensor was not damaged during the installation resistance reading of heating mat and temperature sensor should be taken. This reading should conform to their passport data. 8. It is recommended to prime the subfloor with deepened grounding solution. Intensive absorbing surfaces should be primed twice. Let the surface get dry. МH 9. Lay heating mat with mesh adhesive downside on the subfloor. Make sure that floor temperature sensor is centered between two heater wires. For double-conductor mat it is necessary to put cold lead to the thermostat via channel chiseled in the wall. Make sure there are no wire breakoffs. To check the heating mat and temperature sensor was not damaged during the installation resistance reading of heating mat and temperature sensor should be taken. This reading should conform to their passport data. 11. Sketch on the premise plan the diagram of heating mat, couplings and temperature sensor location. 12

14 heating mat, temperature sensor connection wires in corrugated tube to the thermostat. МHH 12. Pour tile adhesive solution onto the mat leveling the solution from 5 8 mm and let it get dry according to the manual of preparation and application of tile adhesive used. We recommend using tile adhesive for underfloor heating systems. Its preparation and application instructions are given in paragraph When tile adhesive is dry it is necessary to check whether heating mat or temperature sensor was damaged during installation, resistance reading of heating mat and temperature sensor should be taken. This reading should conform to their passport data. 14. According to Technical Certificates of mat and thermostat connect thermostat to the heating mat, and to temperature sensor; connect electric power to the thermostat; perform earthing. 15. Fill in with tile adhesive channels chiseled in the wall which leads connection wires, earth circuit, cold leads of the 16. Lay ceramic tile using new prepared adhesive solution. Maximum thermal resistance between heating mat and the premise produced by adhesive layer and ceramic tile should not exceed 0.06 m 2 K/W. Ceramic tile covering thickness shall be 5 mm minimum. 17. When tile adhesive solution is fully dry I-WARM ultra-thin underfloor system is ready for operation. Turn it on following instructions of thermostat manual. Drying tile adhesive solution time is determined by instruction manual of tile adhesive used. Tiling directly onto the heating mat is possible. Be careful not to damage the heating cable. Adhesive layer thickness shall be 8 mm minimum. Heating mat shall be installed minimum 100 mm away from other heating appliances, e.g. risers and tubes of water heating system. 13

15 6 System switching and operation I-WARM underfloor heating system can be turned on when tile adhesive is fully dry. Switch the thermostat on and set the desired level of heating, using instructions of its Technical Certificate. During the first turning on of underfloor heating system you can set the maximum heating level. It will accelerate floor heating. When the temperature gets to comfort level, reduce heating level as desired. When the system is turned on for the first time, the «warm floor» feeling will appear in some period of time. Mainly it concerns new build unheated premises. Please do not worry and let the system heat your premise. Bear in mind that I-WARM underfloor heating system refers to comfortable heating type, it might not have enough power to heat cold premise when basic heating system is off. 7 Hints and notes Due to automatic temperature regulation I-WARM system consumes exactly as much energy as it is necessary to maintain comfort level of heating. Thermostats installed in each room control heating independently that allows energy saving. I WARM 720 is a programmable thermostat which especially allows energy saving for it automatically reduces or turns off heating when it is not necessary. The thermostat is more profitable in case of double-rate payment. If your premise stays empty in the cold season it is recommended not to turn off the system completely setting the thermostat on the minimal level. In this case the power consumption will be minimal and the room will not be chilled completely so you could heat it quickly upon return. Correct choice of I-WARM underfloor heating system will allow you to reduce heating costs up to 50%. Heating mat must be placed minimum 30mm away from walls, fixed furniture or other items preventing effective heat radiation. During heating mat installation avoid direct contact with thermal insulation if it is of corrosive, hygroscopic, or flammable type. During the installation heating mat should not be exposed to oil, lubricant or similar substance influence. Braided shield of the mat cold lead must be securely connected to earthing terminal in the junction box or to adequate thermostat terminal. To avoid mechanical damage of the heating mat perform installation wearing soft elastic sole shoes or cover the mat surface with plywood boards or other material preventing heating cable damage when walking on it. Minimum mat installation temperature is -5 C. 14

16 8 Your safety Do not change mat configuration made by manufacturer apart from mesh cutting during installation. Do not replace cold leads breaking sealed coupling connections made by manufacturer. Do not alter thermostat design. Never turn on rolled up heating mats even for a short period of time. Never plug heating mats to power supply with voltage different from operating voltage stipulated in Technical Certificate, marking or packaging. Never perform thermostat installation and repairing with ON power supply. Use a qualified installer. Never use heating mats without minimum tile adhesive layer which covers heating cable completely. Pour adhesive solution onto heating mat leveling it evenly along the total surface. Avoid air gaps near heating cable which prevent heat radiation. Floor sensor installation shall be done in the way which allows its further replacement without removing flooring material (See paragraph 5). Do not cover floor surface where heating mat is installed with any thermal isolation materials (carpets, blankets et.c.). Do not hammer nails, dowels or screw into the floor surface where heating mat is installed. Violation of any enlisted requirements will invalidate your warranty. 15

17 9 Warranty Certificate I-WARM 16-YEAR WARRANTY I-WARM 16-YEAR WARRANTY DOES NOT EXTEND TO THERMOSTATS, WHICH ARE COVERED BY A ONE-YEAR GUARAN- TEE FROM THE DATE OF ORIGINAL PUR- CHASE. GOVERNING LAW. Unless otherwise governed by applicable state law, this warranty shall be interpreted and enforced in accordance with the laws of Russian Federation. This 16-Year I-WARM applies: 1. Only to the original homeowner(s) from the date of purchase. 2. Only for the duration of the Lifetime of the floor covering under which it was originally installed if the purchaser of the heater remains the owner of the residence in which it was installed. If the original purchaser sells such residence, the warranty will transfer and continue for the duration of the16 years from date of purchase. 3. Only if the heater has been grounded and protected by a GROUND FAULT CIRCUIT INTERRUPTOR (GFCI) at all times. COVERAGE 1) The warranty period begins on the date of purchase. 2) I-WARM underfloor system is guaranteed by SST LLC to be free from defects in materials and workmanship under normal use and maintenance for sixteen (16) years, provided the Product is installed in accordance with the accompanying I-WARM installation manual, any special written design or installation guidelines by SST LLC for a particular project, the National Electrical Code (NEC) and all applicable local building and electrical codes. 16 3) Provided I-WARM heaters are installed under ceramic tile, marble and natural stone surfaces. 4) During the period of Warranty, I-WARM will arrange for the heater to be repaired or (at its discretion) have parts replaced free of charge. The costs of repair or replacements are your only remedy under this Warranty. Such cost does not extend to any cost other than direct cost of repair or replacement by I-WARM and does not extend to costs of relaying, replacing or repairing any floor covering or floor. 5) If SST LLC determines the repair of the product is not feasible; we will replace the product with equal or similar features and functionality at SST LLC sole discretion. SST LLC MAXIMUM LIABILITY IS LIM- ITED TO THE ORIGINAL PURCHASE PRICE OF THE HEATER MULTIPLIED BY THE PERCENTAGE OF THE WARRANTY PERIOD REMAINING. EXCLUSIONS SST LLC shall in no event be liable for incidental or consequential damages, including but not limited to extra utility expenses or damages to property. This Warranty is null and void if: 1) The floor covering over the heater(s) is damaged, lifted, replaced, repaired or covered with subsequent layers of flooring. 2) The heater fails due to damage caused during installation or tiling, unless damage is caused directly by an employee of SST LLC. It is therefore essential to check that the heater is working (as specified in the installation manual) prior to tiling. 3) Damage as a result of floods, fires, winds, lightning, accidents, corrosive

18 atmosphere or other conditions beyond the control of SST LLC. 4) Use of components or accessories not compatible with I-WARM heaters. 5) Parts not supplied or designated by SST LLC. 6) Damage or repair required as a result of any improper use, maintenance, operation or servicing. 7) Failure to start due to interruption and/or inadequate electrical service. 8) Any damage caused by frozen or broken water pipes in the event of equipment failure. 9) Changes in the appearance of the product that does not affect its performance. If I-WARM is required to inspect or repair any defects caused by any exclusions referenced above, all work will be fully chargeable at SST LLC inspection and repair rates then in effect. SST LLC DISCLAIMS ANY WARRANTY NOT PROVIDED HEREIN, INCLUDING ANY IMPLIED WARRANTY OF THE MER- CHANTABLE OR IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. SST LLC FURTHER DISCLAIMS ANY RESPONSIBILITY FOR SPECIAL, INDI- RECT, SECONDARY, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING FROM OWNERSHIP OR USE OF THIS PRODUCT, INCLUDING INCONVENIENCE OR LOSS OF USE. THERE ARE NO WAR- RANTIES THAT EXTEND BEYOND THE FACE OF THIS DOCUMENT. NO AGENT OR REPRESENTATIVE OF SST LLC HAS ANY AUTHORITY TO EXTEND OR MODIFY THIS WARRANTY UNLESS SUCH EXTEN- SION OR MODIFICATION IS MADE IN WRITING BY A CORPORATE OFFICER. DUE TO DIFFERENCES IN BUILDING AND FLOOR INSULATION, CLIMATE AND FLOOR COVERINGS, SST LLC MAKES NO REPRESENTATION THAT THE FLOOR TEMPERATURE WILL ACHIEVE ANY PAR- TICULAR TEMPERATURE OR TEMPERA- TURE RISE. TERMS AND CONDITIONS Shipping Discrepancies: Incoming materials should be inventoried for completeness and for possible shipping damage. Any visible damages or shortages must be noted prior to accepting the material. Any discrepancy concerning type or quantity of material shipped, must be brought to the attention of your I-WARM reseller within 15 days of the shipping date entered on the packing slip for the order. Miscellaneous: The terms of this Limited Warranty are exclusive and supercede any other warranty or terms and conditions relating to the subject matter whether included in a purchase order for this product or in any other document or statement. 17

19 WARRANTY CERTIFICATE Full Name Street City Zip Code Telephone# E- Mail Purchased from City Installer name Date of Purchase I-WARM system is used as COMFORT heating system. for heating of (type of the premise) total area sq.m area size to be covered sq.m I-WARM heating kit comes complete with: Heating mat (type) Heating mat (type) Thermostat Thermostat (type) Corrugated tube m Manager (signature) Sales office stamp Customer (signature) The installation was performed by Date 200 (signature) 18

20 The plan of the premise I-WARM Heating Mats The plan of the premise with location indication of thermostat, heating mat, couplings and end muffs, and floor temperature sensor. Remember to attach a label to the distribution board with sketched diagram of the wire layout for future reference, which should be kept with a manual for future reference. Heating mat Temperature sensor tube Legend Thermostat Coupling Temperature sensor End muff Mat R... Ω Gage R... Ω 19

21 10 Appendix 10.1 Expansion joints Do not install heating cable through an expansion joint. Heating cable should be installed right up to the joint, if necessary, but do not bridge the joint subfloor 2 expansion joint 3, 4 heating mats Thermal insulation Taking into account that the design of I-WARM underfloor heating system does not imply arrangement of cement-sand layer 3 5 cm thick, direct laying of the heating mat on thermal insulation is not recommended, because in this case thin layer of tile adhesive covering the mat can crack with heat. The base on which the mat is installed must be solid and be of sufficient bearing capacity. 20

22 10.3 Specification of I-WARM heating mats Type MH-160-1,1 MH-215-1,5 MH-265-1,9 MH-360-2,5 MH-470-3,1 MH-570-3,9 MH-660-4,4 MH-800-5,3 MH-980-6,6 MH ,5 MH ,5 MH ,0 MH ,2 MH ,7 MH ,2 Power, W 230/240 V 160/ / / / / / / / / / / / / / /2650 Area, m 2 1,1 1,5 1,9 2,5 3,1 3,9 4,4 5,3 6,6 7,5 8,5 10,0 12,2 13,7 16,2 Type MHH-135-1,0 MHH-220-1,6 MHH-300-2,1 MHH-380-2,7 MHH-470-3,4 MHH-545-3,8 MHH-650-4,8 MHH-815-5,7 MHH-930-6,8 MHH ,8 MHH ,0 MHH ,0 MHH ,7 MHH ,0 Power, W 230/240 V 135/ / / / / / / / / / / / / /2175 Area, m 2 1,0 1,6 2,1 2,7 3,4 3,8 4,8 5,7 6,8 7,8 9,0 11,0 12,7 14,0 21

23 10.4 Recommendations on preparation and application of tile adhesive for underfloor heating mats Subfloor preparation Make sure the floor is clean, secure and free from dust, grease and et.c. Fill in all cracks and holes in the floor surface. It is necessary to prime clean surface using brush or roller. Minimum subfloor temperature should be +5 С. Underfloor Heating System Construction Place heating mat and temperature sensor on the prepared surface according to the Underfloor heating system Instruction Manual. Adhesive solution preparation Pour dry mixture to the vessel with clean water according to the requirements of dry mixture manufacturer and mix it thoroughly using construction mixer until smooth. Let it cure and mix it again according to the requirements of dry mixture manufacturer. Do not add other components to the mixture! Unclean vessels and tools reduce material time of use! Underfloor heating system grouting First option (Tiling of subfloor with heating mat installed) Apply in small portions prepared adhesive solution to the subfloor with laid heating mat spreading solution with a tipped trowel. Lay the tile on the spot and sunk it into the adhesive with a slight touch. Be careful not to damage heating cable. Tile adhesive shall cover heating mat fully and be in tight, air-void free contact with tile surface. Tile shall not touch heating cable or lean on it. Tile adhesive layer thickness shall be 8 10mm. Tile Tile adhesive Heating mat Subfloor Matting underfloor heating system 22

24 Second option (Primary protective layer construction) Pour self-leveling floor onto the mat to a thickness of 5 8 mm according to the instruction manual for preparation of this modified adhesive solution. This interlayer shall cover the mat completely with no air voids, heating mat shall not float up, heating cable shall be buried in this layer. When covering layer cures (curing time should be specified by dry mixture manufacturer) prime the foundation and then perform tiling using prepared tile adhesive solution to a thickness of 5 10mm. Important Notes During application and curing of tile adhesive, ambient temperature shall be from +5 C to +25 C. Make sure there are no draughts in the working room. Underfloor heating system can be turned on only when tile adhesive is fully cured. 23

25 Notes 24

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