After more than ten years of electric water heater development, water heater technology continues to progress, there have been anti-electric wall industry, anti gates, 3D fast heat, inverter capacity increase and other innovative products appear, electric water heater safety, energy conservation, heating rate, the amount of water and other aspects of continuous improvement, the market continues to grow for decades. With the improvement of living standards in recent years, the demand for water is increasing, so the selling volume electric water heater has been raised from about 40 liters in 2000 to the current 60 liters, Hubei, Hunan, Guizhou and other Yangtze River both sides, has been a large volume of water heater 80 liters selling provinces. Electric water heater according to water heating temperature control divided into: mechanical, digital, and three types of CNC. The main components of (1) mechanical control mechanical water heater electric water heater temperature control is a mechanical temperature control knob to adjust the thermostat usually consists of temperature probe, adjustable drive mechanism and a pair of electrical contacts components. When the probe is at a temperature rise, medium (liquid or gas) inside the probe to expand and push the drive mechanism through the capillary, the electric contact action. The operating temperature of the electrical contacts can be adjusted by an adjustable drive mechanism or the electrical contacts of the normally open state. The main features of the mechanical-type water heater thermostat is: operating temperature can be adjusted continuously within a certain range, easy operation, low prices. Suitable for general home use. The disadvantage is that a single temperature control, only one way to achieve the heating cycle. (2) the number of phenotypes controlled electric heater (SX) digital type electric water heater control system usually consists of a display panel, the main control board, strong electrical panels and temperature sensors. Temperature, set temperature, fault code number and timing of the information, you can also use the control buttons and knobs on the front panel to set the operation. The main control board is the core of the control system, for processing and temperature information during the operation of the embodiment of heater control. Strong electric board systems to provide the required power, the implementation of strong electric drive and leakage detection. A temperature sensor for acquiring the temperature information. 3) NC-type electric water heaters (SK) NC-type electric water heaters by the display board, main control board, strong electrical panels and temperature sensors. LCD screen display panel for displaying the operating mode, heating status, current temperature, set temperature, the set menu, clock, time period, fault codes and other information, you can also use the buttons to set the operation panel. The main control board is the core of the control system, over-temperature detection and ambient temperature sensor for detecting the temperature collecting temperature information. Use a maintenance instructions must be out of the outlet opening at Sheung Shui, etc. in order to check the air in the bladder completely after discharge if water filled; 2, you must first row of unprecedented power cut; 3, for a closed installation, heating During the inlet valve must be turned on; 4, just open the valve, do not put the water toward the direction of the body. If the water heater uses a long time, if the user does not promptly cleaned water heater tank, which would cause serious fouling heating pipes, heat pipe electric heating is not sufficient, it is slow to heat up water, affecting the normal use, There is uneven heating during partial rupture of accidents have occurred, so the water heater to be once a year to maintain. Notes Note 1, if the home is not a long-term use of water heaters, then try to turn off the water heater, otherwise neither energy conservation, but also greatly reduces the life of the water heater. 2, conditions permitting, try to carry out a check on the water heater every year, mainly the heating situation, key sensitivity, drain valve is intact, electrical conduits and brackets have a closer look. 3, once every six months to clean up the interior, mainly on the scale clean-heating pipe, which is the main reason for selecting the big brands, big brands to ensure good after-sales professional cleaning, but also eliminates the need for the research yourself hard, prices are relatively reasonable. 4, water heaters use three years or more, it is necessary to replace a heater and thermostat, up to the professional staff to be replaced. 5, regular cleaning of dirt shower and watertight network, to extend the life of the water heater. 6, the drain valve dripping is normal, do not be blocked, or vulnerable to dangerous risks. 7, the water heater when quality problems do not own demolition, must contact the after-sales maintenance. 8. Never use water heaters during cleaning spray, do not use an acidic solution to clean, water heater now looks are relatively flat, so only with a damp cloth to gently wipe. 9, the heater power as waterproof socket configuration. 10, on the water heater's instructions usually indicate life, to the life of the water heater in the future, try to replace the water heater, if conditions do not allow it to be checked regularly. The cleaning method described heater after a certain time scale can form inside the lot, when the scale thickened to a certain extent, not only to extend the heating time, and will happen to crack, there is some damage to the tank, so that prolonged heating, hot reduce the amount of water. Electric water heater drain valve does not require professional cleaning. I remember when the tank should be cleaned once a season, cleaning method is to first cut off the power, close the inlet valve, and then open the valve, reversed 90 degrees counterclockwise plastic drain valve on the ear, and natural drainage net heater, and precipitate. Then pour tap water, cleaning finished, then drain the ear back into place, filled after the first note before electricity. Perennial water heater off the power user should always be concerned about the water heater is normal, there are unusual circumstances should be sent to maintenance repairs. Note Safety Instructions 1. The power supply must have a reliable ground. 2. You must use a fixed three-hole socket, and the socket in the shower water splash than location. 3. regular (weekly) inspection of aircraft power line leakage protection switch, prohibit the use of a switched outlet to keep leakage protection plug to work properly. Water heaters for the winter to keep in mind the law of three and four-note. Usage Instructions 1. When using electric heaters, power indicator light, said it is electrically heated, when the water temperature reaches the set value, the LED is off, turn off the power. When this indicator light, said it is automatically extinguished when the insulation. 2, electric water heaters (storage type) must first be filled with water, and then electrically heated, after the warm-up to use. In case of water pressure drop or sudden without water, best to turn off the power. 3, the electric water heater is equipped with a faucet, and with reflow mounting, usually with the "blue" represents cold, with "red" means hot water. When used, unscrew the "red" tap, hot water outflow there, this time as the water temperature is too high, which can unscrew the "blue" taps, and the amount of water the size of conditioning, you can get optimum temperature of hot water. 4, electric water heater temperature conditioners have water temperature mark scale, as with "I", "Ⅱ", "Ⅲ" or labeled in English, Arabic numerals water temperature is low, medium and high conditioning position the temperature conditioning knobs an alignment mark, the water heater temperature will persist in the file indicates the set temperature. When applying, let the water spill out of the practice test temperature, ability to stop a shower, avoid the water temperature is too high, burns the skin. 5, Sheung Shui is necessary to open the outlet, such as ability to check in after a full discharge of air water tank can be filled. 6, the first row of unprecedented power cut is necessary. 7, for the closed-end device, the inlet valve is turned on during heating required. 8, just open the valve, do not put the water toward the direction of the body. Heater maintenance instructions 1, the initial use: In the first installation of electric water heaters, prior to initial use should first read the detailed product description, and in accordance with the requirements set for the completion of the preliminary prospectus electric water heater to prevent improper or misuse of artificial water heater adversely affected. In the first installation, the use of the water heater, we should note that: a, to ensure robustness installed for water heaters leave enough space for installation in a solid wall; b, make sure the water heater is an independent power supply, and with leakage protection equipment; c, then open the water valve on the water heater, Sheung Shui, in order to ensure smooth air heater, exhaust; d, and then determine the full water column heater conduction heating. 2, regular inspection: electric water heater for regular checks are a lot of families most likely to ignore a link, in fact, not only to the use of the effect of the water heater, the water heater is more related to the use of safety is the most important step can not be omitted one. Check the main aspects are: a, heating pipe: water heater After a period of use is relatively easy in the heating pipes and other parts of the build-up of scale, regular maintenance of the heating pipe can enhance thermal efficiency, saving electricity play a role. b, Liner: heating pipe Similarly, periodically clean the water heater is also very important, we recommend cleaning steps liner in accordance with product instructions to complete the work: first power off, emptying the water heater, into the water after cleaning, should be the same as the initial use of the water heater after the cleaning is completed, the first on the water heater filled with water after the power is turned on again to start heating the water heater work. Dual heat pipe water heater, when less water, use only the upper heating pipe heating, more energy-efficient heating using stratified