British INVENSYS thermostat?

To participate in the comparison of the brand model (the current market existing major brand models (not wall-hung boilers this brand)): A, Italy IMIT "Imit" brand CRD PLUS a week to enhance the type B, the United States HoneyWell "Honeywell "brand T6651E a week type (or CM17 or CM Chronotherm) C, Germany SIEMENS" Siemens "brand RDE10.1 a week type First of all, a statement: you choose any of these three brand models or other brand models are not Wrong, and I introduced to you, just so that more users have a comprehensive understanding, a chance to compare, there is another kind of choice only. Because many homeowners in the choice of wall-hung boilers with thermostat, do not know where to start to understand, is completely new. Although there is inevitably a personal slant, but its thesis and parameters are absolutely objective and realistic, real and effective, can be completely face to face on the spot check. First, the brand: from the brand name, social status, Imit can not be compared with Honeywell, Siemens; but in the thermostat industry in this small field, Imit's production capacity and sales, technical standards are beyond the first two. Imit thermostat technical standard is better, because there is a realistic basis, the Italian wall-hung boiler industry is larger, more technologically developed, more comprehensive upstream and downstream derivative products are more numerous, can have a certain advantage is reasonable, objective inevitable. Second, manufacturers and production: Honeywell, Siemens has always been on its four, five or six lines of the project's products are mostly commissioned, OEM OEM and other forms of production, Honeywell first commissioned a factory in the United Kingdom, is now in Tianjin, China, there is a fixed factory, Siemens production plant origin is not clear, but the finished product packaging workshop in Hong Kong. The comprehensive strength of the Imit manufacturers are not enough to implement these overseas behavior, but also to ensure that the "Italian factory production, global original supply. Third, the appearance of technology: Siemens RDE10.1 the best, thin and dynamic, the right side of the open small half-flap; Emmett CRD PLUS rounded thin, elegant and generous, the left side of the open large flap; Honeywell T6651E industrial product style, standard rectangular body and the thickness of the big, under the flip-open type of large flap, the most undesirable is the flip cover of the two small axis card design problems, especially love loose love break. Fourth, the shell color: Imit CRD PLUS best, hardened and polished surface, pure beige; Siemens RDE10.1 second, ordinary surface, white with light blue; Honeywell T6651E, ordinary surface, ordinary off-white. Fifth, the information display: Imit CRD PLUS display content is the most abundant, with a chart, is the same screen display; Siemens RDE10.1 display screen is the largest, eye-catching characters, the content of the second, with a chart, is not the same screen display; Honeywell T6651E display size equal to the Imit CRD PLUS, the display of less content, no charts, is not the same screen display. Six, the program mode: Imit CRD PLUS function of the most programs, automatic manual antifreeze vacation four working modes; every day of the week in any one hour can be designed for different temperature gear; Honeywell T6651E function of the program is also more, automatic manual antifreeze vacation four working modes, every day of the week can be divided into four time periods designed for different temperature gear; Siemens RDE10.1 function of the program at least Siemens RDE10.1 function program at least, automatic manual two working modes, any one hour a day in a week can be designed for different temperature file. Seven, self-control mode: all three are PID calculus proportional fuzzy control, but only Emmett CRD PLUS manual marked the calculus value of 0.2 ~ 0.4K, the other two are avoided specific parameters, analysis should be Emmett CRD PLUS self-control of the highest level of intelligence, room temperature fluctuation curve is the smoothest. Eight, temperature control accuracy: both the theoretical parameters or the user's sense of reality, Honeywell T6651E temperature measurement is very sluggish, because all Honeywell products are with the traditional design of industrial dust thinking, the thermostat is a fully enclosed design, the room temperature is first through the shell and then only to be conducive to the temperature sensor, and then fed back to the chip, and in the city users of the modern family indoor environment, the design of this completely outweighs the benefits and greatly reduces the temperature sensitivity of the product. Honeywell T6651E temperature measurement accuracy of 0.5 degrees, shell without temperature measurement port indirect temperature measurement, temperature measurement frequency to avoid the specific parameters; Siemens RDE10.1 temperature measurement accuracy of 0.5 degrees, the shell has a temperature measurement port direct temperature measurement, temperature measurement frequency also avoided the specific parameters; Imit CRD PLUS the highest accuracy, the temperature measurement accuracy of up to 0.1 ℃, the shell has a temperature measurement port direct temperature measurement, the temperature measurement frequency as fast as 1 time / minute. Nine, anti-freeze protection: Honeywell T6651E is the best, is 5-10 degrees adjustable, unconditional priority; Emmett CRD PLUS is second, is fixed at 6 degrees, unconditional priority; Siemens RDE10.1 no anti-freeze protection mode. Ten, vacation (timed conversion work mode) function: Yimet CRD PLUS has a vacation function, the accuracy of up to 1 hour, to achieve the day of the need for timed conversion work mode; Honeywell T6651E has a vacation function, the accuracy of 1 day; Siemens RDE10.1 no vacation function. Eleven, manual advance function: only Imit CRD PLUS has this function, can be a number of minutes in advance of the target temperature change in the remote program, according to the different performance of the cooling terminal effect, to adapt to the specific needs of users. Twelve, the cumulative running time of the system display function: only Imit CRD PLUS has this function, you can always query the effective running time of the system, analyze and compare the home wall-hung boiler heating system of energy saving or cost of gas. Thirteen, the battery box design: Yimet CRD PLUS is the best, is external, easy to change the battery fast and safe, do not lose the program, completely eliminating the possibility of the user to the internal strong and weak components of the solution; Honeywell T6651E is second to the built-in type, the battery may be solved or damaged to the internal strong and weak components of the solution; Siemens RDE10.1 the most troublesome, it is built-in and to use tools to disassembly. Chip power failure time of more than 15~20 seconds may lose the original program settings. Fourteen, size: Siemens RDE10.1 is a vertical rectangle, 120 * 95 * 23 mm (thickness of the thickest place), counting the most compact; Emmett CRD PLUS is a horizontal curved rectangle, 125 * 85 * 25 mm (width and height of the largest place), the proportion of the more coordinated; Honeywell T6651E is a horizontal rectangle, 130 * 80 * 37 mm, thicker than the nearly thick; Honeywell T6651E is a horizontal rectangle, 130 * 80 * 37 mm, thicker than the nearly thick; Honeywell RDE10.1 is the most troublesome; the chip is built-in and have to use tools to disassemble. 37mm, compared to the thicker nearly half. Fifteen, the installation effect: Siemens RDE10.1 and Imit CRD PLUS better, after the installation can completely cover the user reserved 86 junction box; Honeywell T6651E positioning hole design problems, after the installation of the junction box above the obvious part of the cover can not be missed, leakage of the bottom of the box, especially the installation of the height is not high or the user's body is taller, above the leakage of the bottom of the box is particularly conspicuous. Sixteen, the operation of convenience: Siemens RDE10.1 simple functions, button design less (9), the first programming and daily operation of the most convenient; Honeywell T6651E moderate function, but press the health more numerous (15), the first programming and daily operation of the operation of the convenience of all according to the middle; Imit CRD PLUS function most, press the health streamlined (8), the first programming more complex and cumbersome, but daily operation is very simple. The IMET CRD PLUS has the most functions, and the press buttons are streamlined (8). Seventeen, packaging and manuals: Emmett CRD PLUS with Siemens RDE10.1 are retail hardcover box, within the official Chinese and the original version of the two manuals; Honeywell T6651E is an industrial package of soft cartons, no official Chinese manual. Eighteen, performance price and warranty: performance on the Emmett CRD PLUS highest, Honeywell T6651E second, Siemens RDE10.1 lower; manufacturers price positioning on the Emmett CRD PLUS and Honeywell T6651E comparable to the high, Siemens RDE10.1 is the positioning of the medium price. Warranty is generally two years. There is also a Danish Danfoss, cheaper, domestic also have a good, but to cloth four wires connected to the 220V power supply.