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Solar water heater heating cable
product information:
 
Features and Applications:
 
Solar water heater heating cable is a kind of electric power system with temperature changes automatically adjust the power and temperature of the strip temperature limiting heating device, can effectively solve the solar water heater pipe blockage and distress.
 
 The advantages of solar energy is known as clean, continues, safety, become the focus of the world. Solar energy technology is the replace energy as coal, crude oil and other fossil fuels, which can reduce the emission of pollutants, but also can reduce the consumption of conventional energy. The promotion of solar water heater system has great significance for energy-saving and emission reduction. The solar water heaters have the problem for the water inlet and outlet pipe frozen & blockage in the cold northern winter.The Sinyu energy-efficient solar water heater dedicated self regulating heating cables, which can be ensured the smoothly using of the water pipes for solar water heater in the cold northern winter.
 
Self regulating heating cables is also called as temperature control heating cable, which is a kind of electric power system with temperature changes automatically adjust the power and temperature of the strip temperature limiting heating. Sinyu self regulating heating cables specially designed for solar water heater ,which is made of high-tech - radiation technology and nano conductive material in the modern international recognized, with intelligent product self regulating function. It can change with the temperature of the power cable, low temperature heat, and the heat quickly, meet the heat insulation requirements; when the temperature is high, the heat is reduced, to achieve the purpose of energy saving. And it allowed to overlap in the installation site of arbitrary clipping, no high temperature overheating phenomenon, easy to install, easy to use, is an effective solution to solar water heater pipeline freezing preferred product for blocking. The temperature resistant is 105 ℃; flame retardant; starting current; no overheating phenomenon; the use of large length; energy saving; has good insulation properties; aging; the belt body is soft; safe and reliable; simple installation, no maintenance.
 
Executive standard
    GB/T19835-2005
Structure:1.copper core wires of   2 .conductive plastic layer (PTC)  3.sheath 
 
Operational Performance
1.温度范围:最高工作温度65±5℃ 最高表面温度85℃
1.Temperature range:the highest working temperature 65 ± 5 ℃ the highest surface temperature 85 ℃ ,最高承受温度:改良性聚烯烃105℃,阻燃聚烯烃135℃
the highest bearing temperatures: modified polyolefin 105 ℃, flame retardant polyolefin135 ℃
2.施工温度:最低-35℃,最佳施工温度为0℃以上
2.Construction temperature: -35 ℃ minimum, the best construction temperature is above0 ℃
3.热稳定性:通断各300次,连续15天,电缆发热量维持在90%以上
3 Thermal stability: off 300 times each, for 15 consecutive days, cable heat maintained above 90%
 
 
Main function and selection:
Power, starting current and maximum length of use
Power is the product of current and voltage, when the voltage is constant, the size of the current determines the size of power. The starting current of the heating cable is much larger than the electric heating current in steady state operation, typically as1.5--3 times. Because a cross-sectional area of the conductor in the specific environment temperature and temperature cross flow is fixed, in the same conditions, with tropical starting current general is 10℃ value, when the ambient temperature is decreased, the starting current is large, so in the alpine region, such as the winter at low temperature starting, to consider starting current variable convention with tropical maximum use of shorter length, we should adopt the conductor cross-sectional area larger with the tropics, such as 7*0.50mm with tropical, under the same conditions of its carrying capacity is double of 7*0.32mm, the maximum length is also double accordingly.

Installation method
1. The selection and installation of the power cable,
Use copper wire, cross-sectional area≥1.5cm2. It’s better to choose low smoke and non halogen wire. The connection wire of power cable should be divided into the following color :
1, Phase - the same as the power color
2, N line - Blue insulated wire
3, PE line -  Interphase as green and yellow insulated wire
 
Joint method of power cable and heating cable
Firstly deal with heating cable conductor leader insulation. Then deal with the power and heating cable conductor joint according to the electrical wiring rules.
 
The end blocking method of the heating cable
1, Firstly, cut the end, separate the end and the conductor, attention: The end of two conductors is strictly prohibit articulated.
2, Using high-pressure self-adhesive tape wrapped end to 2cm, then wrapping one more layer with PVC waterproof tape, prevent high-pressure self-adhesive tape shedding and aging.
 
Fix the heating cable with hot water pipe
1, When fixed the heating cable with water pipe, it should be used the wide enough band over 20mm, in order to prevent injury the heating cable. 
2, The heating cable and hot water pipe should be parallel to installation, and don't pull too tight, leave enough space between two tie for loose .
3, In the elbow, the heating cable should be installed along the bend convex, and fixed at both ends and the middle of the elbow.

Installation of insulation and moisture-proof layer
1, The combustion performance level of the insulation layer material should be in B1 above (A1 is not burning, B1 extremely difficult combustion) must use fiberglass(or rock wool) products.
2, The thickness of the fiberglass insulation layer should be 20-30mm.
3, Tied a sufficient thickness of the fiberglass insulation layer with incombustible glass composite aluminum foil (combustion grade A) take cover wrapped with a layer again, which is moisture-proof layer.
4,Must be install insulation layer after the heater installed, and the power on test qualified.

Fire prevention measures
At present, some of the solar water heater accessories manufacturers and electric heat tracing manufacturing company with a layer of metal hose practices in the insulation layer in order to prevent accidental ignition with heating cable in operation, is also a kind of method of double insurance.
1, Protect the pipe mouth, avoid scratching the insulating layer.
2,Sealing aluminum tape in the top of the hose where is longer than 100mm of the heating cable.
3,Arranged a leakproof drainage tube below the hose, sealed with aluminum tape.

Notice:
1, The wiring should be protected by metal hose, in accordance with the provisions of civil building electrical specifications, the diameter of bending radius should not be less than 6 times metal hose, the two ends of the metal hose should be equipped with protection wire mouth, should not be back ground, loose, middle joint. Hose wire connectors are prohibited.
2, The power supply should be the distribution loop independent, set up a dedicated switch and leakage protection device, and also shall comply with the provisions of the electric power sector.
3, The heating cable is strictly prohibited by roller compaction, impact, bending, twisting in the transport, storage and installation process .
4, The two ends of the heating cable can’t  be soaked or caught in the rain.
5, The heating cable should be parallel installed with the outer wall along the outlet pipe, it’s better to stick the heating cable along the hot water pipe by using the aluminum tape which can be expanded the radiating area, applicate it along with the outside of the aluminum tape.
6, It should avoid the excessive flexural of the heating cable in installation (bending radius should be 5 times bigger than the thickness of the heating cable)
7,The power transmission test is needed after the installation, the completion and acceptance is finished after normal operation .
8, The insulation resistance should not be less than 5MΩ between heating cable and metal hose (measured by 500V megohm meter), it must be deal immediately if not meet the requirements.
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Address: Anhui province Wuhu Wuwei City high tech Industrial Park Telephone: 0553-6864666 0553-6864888