Weak current College】 【how to properly select the heating cable.

<br> <br> Low-radiation and thermal heating as an energy-saving, environmental protection, comfort, safety, a new type of heating means to have a long life, 50 years from maintenance, and many other other heating methods incomparable advantages ., has gradually been large numbers of developers and tenants. And residents of housing heating, industrial plants and heating, school classrooms, hospital heating pipe insulation, greenhouse warming, melting snow slope, and other areas to large areas of application, the current domestic promotion .has a total area of nearly 10 million square meters. And each year to more substantial improvement. But the majority of real estate developers, selective thermal heating, note the following issues: <br> <br> First, select cable is key <br .> Geothermal heating and power cable as the core part, because of its buried in floor cement layer is not easy to repair and replacement, so cable quality directly determine the service life of the heating system, its structural design, materials selection, production history, .product applied historical age, etc, are we select cable the primary factor to consider. <br> 1, domestic current most heating cable, such as the introduction to Nordic Norway Finland Naikesen, ENSTO, Denmark di Vito, brand, has forty years of .history, in many major projects is applied on the product quality are fully proven. In addition, United States, Germany is also the brand product has been applied in the domestic market. If not to the application of the test project, the quality of some .products, through the experimental detection of hidden dangers is hard to find, once a large number of applications, there will be a systemic problem. <br> 2. impact of heating cable quality factors: <br> (1) Note the conductor wire .core of material: <br> Since the conductor wire core's main role is to work through their resistance will be converted into heat and electricity directly determines the twenty-one years of heating system of power constant, that is, the stability of the heating effect ., can be regarded as a conductor wire core resistivity of stability determines the stability of the heating effect and impact resistivity of two main factors, oxidation and stretches the conductor lines after the change. Consequently in choosing the conductor wire core must select oxidation resistance and tensile .strength of alloy materials such as titanium and nickel alloy (ie no stainless steel material) instead of choosing copper or non-alloy materials. <br> (2) conductor cable core structure should select multiple stranded structure, you can reduce the conductor wire core .extension coefficient of heat, ensure that the conductor wire and insulation and sheath material between the hot set match. <br> (3) insulated and sheathed materials aging life period, 60 to 80 degree temperatures must be up to 50 years, to select the .silicone rubber composite materials or PTFE, etc. <br> (4) alloy shield effectively shield off electric field on human life, also played a role of leakage protection. If the insulating layer is damaged, shielding first charged, when a shield with currents .up to 30mA, its front-end for earth leakage protection switch auto power-off, on human life play a protective role. Therefore, an unshielded cables should be carefully selected. <br> 2. the manufacturer's production capacity and brand guarantee <br .> Domestic currently used geothermal cables are mostly from abroad, the foreign enterprise production scale, enterprise credibility also varied. Naikesen (Norway) in the company of double guide heating cable, all-in-one Splice, implicitly Millimant heating cable network, and other .technologies are leading a trend of heating cable, and naikesen heating cable failure rate is quite low. Naikesen all heating cable is based on national standards such as IEC and CENELEC standards for production and inspection, and meets the European low voltage standards. The product also .obtained ISO9001 quality system certification, ISO14001 environmental standards and EMAS standards. <br> <br> 3. experience of construction party directly affects the quality of the project <br> Product quality is important, but the construction unit of experience also have a direct .impact on the heating system of quality and future operating costs, such as flooring and walls around the facade insulation treatment, thermal network node processing, thermal network end of treatment, and many other small link will cause systemic corruption. Therefore the construction unit of experience .on the impact of construction quality. <br> In addition, the construction unit without the manufacturer training and authorization, the manufacturer of the construction process of the quality issue is not responsible for, and even by agents direct construction, manufacturers are only responsible for .its products, but no process is responsible for. <br> IV. relevant product support <br> Thermostat as floor electric heating of core controller, it not only has a direct impact on the system of quality, but also have a direct impact on .the heating effect and future operating costs. As far as we now know, the current temperature controller only two: the first one: the manufacturer's recommended or supporting the use of belt probe control surface temperature to sense temperature controller. Its main function is to control .surface temperature, cable protection role, make sure the cable operating temperature does not exceed the prescribed temperature adjustable temperature range, usually 30-60 ° c, and the room temperature is wrong, the user can easily lead to misunderstandings. The second way: only .used for induction of air temperature, air temperature sensing temperature range 5-30 ° c, thermostat indicates temperature and the actual temperature of the room and so on, you can take full advantage of the Sun, kitchen, household appliances, and other supplemental secondary .energy, energy saving achieved significant results, but not directly on the cable, terrestrial and cable manufacturers on this control will not be accepted. <br> <br> <br> <br> <br>.