Present situation of property in Qingdongli

Old-timers' essays on wall-hung boilers. (turning)

Repost: It is said to be an essay written by a senior engineer in the wall-hung boiler industry in the first half of the year.

It is said to be an essay by a senior engineer in the wall-hung boiler industry in the first half of the year. There is no full text, only the first two chapters. ......

The first part: Some opinions and analysis on the present situation and existing problems of wall-hung boiler market in Beijing market.

According to the annual comprehensive arrangement of the relevant departments of the industry through customs inquiries and enterprises' self-declaration, in 2003, the number of gas-fired wall-hung boilers imported nationwide reached 97,000, and it was basically determined that nearly 45% were sold and installed in Beijing and surrounding areas. Gas-fired wall-hung boilers, together with other household heating systems, have completely gained a foothold in Beijing, just like municipal central heating and district central heating.

At present, the main brands of gas wall-hung boilers in Beijing are Italian brands. Italy's Baxi, Beretta, Faruoli and Yima account for more than 85% of the market, followed by France's Weineng, Bosch, wiesmann and Schaaf, and the sales of domestic joint venture brands such as Yan Di, Squirrel, ariston, Chuangerte and Hemisphere are on the rise. Korean and Japanese brands are backward in technology and inferior in quality. They were cheated by Beijingers for more than two years at 0 1 and 02, and have basically withdrawn from the new project of Beijing's Fifth and Sixth Ring Road. Apart from Dong Qing's investment in Shunyi, there may not be any factories in the urban area.

Italian brands will take the lead for the following reasons:

First of all, the winter climate in Italy is quite similar to that in Beijing. It is cold but not very cold, suitable for wall-hung boiler heating. Italy has a very high proportion, and the large supply and demand environment is suitable for the development of wall-hung boiler industry. Although the top three are Weineng with an annual output of 654.38+0 million, Bosch with an annual output of 700,000 and Baxi with an annual output of 600,000, six of the top ten are Italian manufacturers, and the global output exceeds 55%. In terms of annual sales volume, the global market is mainly in Europe, with over 6,543,800 units in Italy, over 900,000 units in Britain, and only nearly 500,000 units in France and Germany. In terms of the number of manufacturers, there are at least 200 large and small brand manufacturers in Italy.

Comparatively speaking, Italy's wall-hung boilers do have some characteristics, such as exquisite new technology frontier, visual sense of appearance and taste, comprehensive functions and performance, rapid upgrading of new models and series, reasonable price and high cost performance, which generally conform to the characteristics of Italian products. Those brands in Germany can be regarded as a supplement to developers who emphasize the quality of programs or have a strong sense of traditional quality recognition. The buddies who engage in German agency always say that German products don't stress quality, but this sentence won't last long! According to the actual comparison, it may be that the thickness of the shell and copper tube is slightly better, and the appearance, new technology and technology are not only inferior, but also inferior in some small aspects. French nuclear power is very developed, mostly using electric heating, and the gas heating pressure is low. As for domestic joint venture brands, they are all launched for one or several years, and the technology is indeed the latest version. In the past few years, spare parts were also purchased honestly from all over the world, but the production line technology and workers' assembly level are similar, and the scale is small, the cost is high and the price can't be reduced, but in general it is much better than Korean and Japanese brands.

Fuck! It seems that the Italian wall-hung boiler is similar to the China color TV. It is the most lively, the things are OK, and the price is OK.

Secondly, there is definitely a horse's credit. It must be mentioned that Yima brand occupies nearly 60% of the Beijing market, and Yima brand, which ranks lower in global production and sales, shines in the Beijing market. It is said that his sole agency background in Beijing is extremely hard, and it is difficult to be the former chairman (hearsay, I do not assume any responsibility without textual research). Besides, although Yima's furnace quality can't be complimented vigorously, it's nothing in recent years.

What kind of wall-hung boiler is good and what kind of wall-hung boiler is similar? I don't know, just a little feeling.

1) First of all, the above brands or global products can be selected into the top 20, and there are basically no major internal quality problems. Never deny a brand because of an accident or a fault. Both hardware and software have inevitable reasons, and frequent accidents and failures have objective probability. The wall-hung boiler is only a manifestation of this incident, and often the responsibility of the manufacturer is only half or within the scope of exemption. For example, there are problems with gas source, water source and power supply, installation, after-sales service, years of maintenance, improper use and so on. Only brands with very small sales volume may not have an accident because the base is too small.

2) At the present stage in China, due to various special reasons caused by non-retail nature and developers' purchasing, the brand with more market share is not necessarily the best brand, and the model with more market share is definitely not the best model. If you can choose brands, the top ten brands in the world will be selected in a short time.

Third, the brand should be valued rather than the series models. There is a big gap between different series models of the same brand. For example, luna2000 series models of Baxi brand are better than eco2000 series models, super ex series models of Beretta brand are better than ciao series models, and mini series models of Yima brand are better than star series models. The vuw plus series models of Weineng brand are better than vuwpro series models, the Eurostar series models of Bosch brand are better than the European fashion series models, the ca series models of Sapporo brand are better than the mc series models, the Ma Di series models of Yan Di brand are better than the Jiawa series models, the Little Genius series models of ariston brand are better than the Little Pioneer series models, the Duke series models of Little Squirrel brand are better than the Prince series models, and so on.

4) Comparison between different brands, simple methods are as follows: First, compare the design and production time, which is generally designed five years ago. The models that have been running for three or four years all over the world are better, the mature and verified new technology level, the price has also dropped, the potential problems have been eliminated, the safety has also improved, the production technology has been improved unprecedentedly, and the operators are the most skilled; Secondly, compared with the field view of shell opening, the general shell design is reasonable, the layout in the furnace is simple, and the front is easy to disassemble and maintain; More integrated components, fewer pipelines and interfaces, and fewer failure points; Various high-voltage and weak-current wire harnesses are designed to avoid heating and are bound and fixed; The position and number of temperature sensors should be plug-in rather than attached; Anti-freezing measuring points and procedures are optimized to absolute full state, and anti-freezing is unconditional; The location and quantity of ion flame detection needles, the water pump should be Glenford or Willard original, with automatic exhaust and bypass design, the fan should be ebm or made in Europe, the wind measuring point should be away from dust and clean well, the three-way valve should be 220v electric, the gas valve should be Italian sit instead of Honeywell, the hot water plate should be replaced, and the hot water should be started at low water pressure; The circuit board should be a digital single chip microcomputer, not analog, and the outer box of the circuit board should be waterproof; Time program optimization of forward and backward scanning; There is a fault code display; Computer interface is dispensable, whether environmental protection is behind.

5) The product is more important than the after-sales force. Most companies that act as import agents will do several projects, earn some money, and settle the money from the developers. This community is already in the second phase, and there is no third phase. The market has changed, the relationship has run away, and the opportunity has run away, so it is necessary to change the license and change careers. Developers have always played Tai Chi, and such trivial matters as money and power will never be considered and solved. Nine and a half of the ten manufacturers have no after-sales service. In China, whoever sells things in this industry will provide after-sales service, and the agent is in the front. The agent price has included the after-sales service fee for one or two years, and the manufacturer is in the back. After the broker escapes, as a last resort, a white-collar technical trainer with a monthly salary of 3,500 yuan will come to the door in person. At ordinary times, I just suffer from the property while being scolded and looking for someone to maintain it.

The second part: One-sided view on the phenomenon that the present situation of wall-hung boilers with thermostats in the market is not optimistic.

In the rapid development of household heating mode of gas-fired wall-hung boilers, an extremely asymmetric and completely abnormal situation that runs counter to the general policy direction of energy-saving heating in China is that in most cases in Europe, thermostats are necessary accessories for wall-hung boilers, and most of them are intelligent thermostats. However, in China, nearly 95% of the wall-hung boilers that have been installed and put into use are not equipped with any simple or intelligent temperature controllers in advance. Room heating system is equipped with temperature controller, especially intelligent temperature controller, which is the most prominent and important link in the comprehensive energy-saving heating system except for the thermal insulation structure of room and building exterior wall.

In the special report of Beijing International HVAC Products Fair in 2002, a senior engineer of the first batch of imported household HVAC products in HVAC industry said sadly, "Many developers spent five or six thousand RMB to purchase imported wall-hung boilers, but forgot the intelligent room temperature controller of several hundred RMB. But what I want to say is that if we only look at it from the perspective of energy saving, as long as it is a wall-hung boiler of European and domestic regular brands, even if the project price difference is as high as nearly 2,000 RMB, the actual gas consumption difference is only 5%, but compared with the wall-hung boiler without intelligent temperature controller, the actual gas consumption difference is at least 25%-30% ... ". Thus, the position and function of intelligent temperature controller in wall-hung boiler heating.

According to incomplete statistics, in the whole city, developers and wall-hung boiler agents pre-install simple or intelligent thermostats before delivery, which is not higher than 5~6% of the total number of wall-hung boilers, and the intelligent ones are very few, almost zero, just like one or two small projects; In the whole city, only 15% of the total number of wall-hung boilers is paid by the owner after delivery, and almost all of them are intelligent. The popularity of residential areas with high awareness of individual owners reached 30%, and all large residential areas were recorded as zero. Only about 15% of the parts added after delivery are sold by wall-hung boilers and about 85% by thermostats. The reason why the total share, penetration rate and distribution rate of this sales market share are extremely abnormal is not a word "profit". The analysis may have the following reasons:

1), pre-allocation before delivery is extremely rare:

In order to reduce the project cost to the maximum extent, developers have a policy for all kinds of accessories, value-added products and small projects under construction, such as the thermostat of wall-hung boiler: turn off what can be turned off, and don't match what can be turned off. Similarly, in order to reduce the total bid amount, the most likely bid or transaction is low price. In the quotation, the most important parts thermostat is quietly erased, or a remark is added in brackets, saying that the thermostat is calculated separately.

Alas, internationally, government model projects led by Huilongguan or really high-end projects are all pre-installed, but they are pre-installed, and most of them are the cheapest non-programmed manual mechanical models, commonly known as "big knobs". This thermostat has no other value-added function except changing the backward water temperature control into real-time room temperature control. But then again, in today's world, taking fifty steps back is a good soldier.

2) Most of the reasons for the low sales and installation share of wall-hung boiler agents after delivery are:

For example, I made a mistake earlier, and it is really inconvenient to announce it later. I simply don't mention the wall-hung boiler and thermostat, so I'm relieved. This is why many owners, including property owners, don't know about this product. Few developers, owners and wall-hung boiler agents take the initiative to inform the behavior or notice of the thermostat. If the owners know, they will ask for free pre-allocation together, which will be very troublesome and difficult to deal with in all aspects. Indeed, the wall-hung boiler, a new thing, has only been in China for a few years. People who buy a house from time to time will have a chance to know it only when they close the house, and it is likely to be covered by a lot of procedures.

Secondly, for the upper layer of the wall-hung boiler mechanism, people are engaged in engineering. When a community comes down, there are as few as three or five hundred units and as many as three or four thousand units, and the profit of each unit is not less than 1000 yuan. They concentrate on resettling several key people. At the end of the round, the gold will fill the keg, and they will be too tired to do small business. As the company's middle-level engineering business personnel, there is generally one or two points of commission, but the profit of subsequent after-sales service and accessories selection is absolutely no commission. As a technician for on-site maintenance and debugging in a low-rise residential area, almost all the wall-hung boiler companies have failed to achieve piece-rate wages, and the monthly banknotes are fixed. Installing a thermostat, they buried the pipeline for more than ten meters, and used an electric hammer to slot and punch holes in the wall, which is not a maintenance skill. After that, you should explain its purpose in detail and explain it clearly to your husband. Tomorrow, a lady will call you. On the third day, an aunt and uncle with a dialect accent may call your personal mobile phone. You can't hang up without spending 4 yuan. Later, you may complain about your poor service attitude, because the thermostat of this brand of wall-hung boiler often has no formal Chinese version of the manual, and the owner will not operate completely normally at once. The most important thing is that the company will never give him ten more dollars. The company thinks this is the job of on-site maintenance personnel. So unless someone gives more money, such as the installation fee without a ticket, they will be willing to accept the installation. Otherwise, I'd rather chat in the office of the property engineering department. Playing with a small wrench is more technical than holding a big electric hammer!

Thirdly, the wall-hung boiler agent company often installs the thermostat of the wall-hung boiler brand, which is customized by the wall-hung boiler manufacturer in the thermostat manufacturer oem, and no wall-hung boiler manufacturer produces the thermostat itself. Its commodity flow is as follows: A thermostat manufacturer goes to B wall-hung boiler manufacturer, B wall-hung boiler manufacturer goes to C wall-hung boiler agent, and C wall-hung boiler agent goes to local "herding sheep". Many links, international trade, high price and long cycle. In addition, the thermostat, as an accessory of the wall-hung boiler, has a "glorious" tradition that the Japanese must have for domestic imported products: the price of spare parts is three times that of the whole machine. Of course, there must be less sales, so the purchase price will naturally not come down.

The price of more than 1000 yuan, the attitude of prevarication, the style of not loving sales, and the owners' low awareness of the products have caused the wall-hung boiler agent, which should be the biggest window for thermostat sales, to be unable to open. Therefore, many newspapers say that the wall-hung boiler is an expensive and unaffordable heating method. In fact, old reporters and workers only know what it looks like, but they don't know. As an extremely important supporting product for wall-hung boiler heating, thermostat, the key link of energy-saving use, has not been equipped to keep up.

3) The proportion of thermostatic mechanism is high, but the total amount is far from enough. The analysis is as follows:

First of all, thermostat agents are mostly industrial control and automatic control business, mainly engineering batches, supplying parts for domestic manufacturers, and there are not many on-site services. Most merchants only sell air-conditioning fan coils with thermostats, which are low in price and large in sales. Few merchants will sell wall-hung boiler thermostats with high prices, small in sales and narrow in surface. In other words, there are very few owners who sell thermostats, so they can't afford the market. There are only two or three door-to-door services in Beijing.

Secondly, the wall-hung boiler agency opposes the thermostat agency, and some communities even obstruct it. The reasons are as mentioned above: uncovering the truth, breaking the monopoly, bumping into people's land and stirring up the market at low prices. At present, the quotations of wall-hung boiler agents of various brands in the market for installing thermostats are nearly 1 times higher than those of thermostat agents, and are generally above 1000 yuan. Wall-hung boiler agents never talk about the price of "sheep". Because they have a "trump card" in their hands, and the front of the "trump card" says, "If you don't buy it from them, then this thing can't be used if it doesn't match their wall-hung boiler." The reverse side says, "It wasn't what they bought there that seriously damaged their wall-hung boiler. Whoever wants to install it won't go there to buy it, and it won't care if the wall-hung boiler breaks down in the future. " Although this statement is totally unfounded and there is no technical reason, these two tricks were even more brutal in 0 1 and 2002, which prevented a large number of new owners from installing thermostats. After all, everyone does not understand. This is also an important reason.

However, it was basically released later, and the owner was not a fuel-efficient lamp. You insist that I spend more than 1000 yuan on yours, but don't let me spend hundreds on others. So I tried. After using it for a year, everything was normal, and then I compared it. He is a smart and beautiful new product, and you are still a big old model. People are genuine retail packaging, and there are two kinds of instructions, the original and the Chinese version. You're still in a simple industrial package. This psychological pendulum is uneven, and it should be understood that in this process, the owners' forums of major websites have played a great role. Now we all know that in addition to Korean and Japanese wall-hung boilers, European and domestic wall-hung boilers must have standard interfaces for thermostats. Some well-designed wall-hung boilers also lead the interface out of the circuit board box inside the furnace, which can be connected without opening the cover. All brands of wall-hung boilers are equipped with thermostats, which are absolutely universal to all brands of wall-hung boilers. The so-called "trump card" is self-defeating. However, since last year, wall-hung boiler institutions have also begun to be self-disciplined, rarely unreasonable and arrogant. After all, people do big business and look down on small things. In addition, the thermostat is installed, which saves fuel, the owner is not so picky, and there are few articles criticized in the newspaper, which does not affect my big head. There are still many wall-hung boiler projects to sign below. People in the circle have known each other for a long time, and I'm a little embarrassed. I don't look up at you. Now, if there is any deterrent behavior, it is often a few personal behaviors on the spot.

Third, this is also the bottleneck restricting popularization at present. Double-core wire/telephone line should be connected between the thermostat and the wall-hung boiler, and the developer did not reserve a hidden burial when handing over the house; After the delivery, the property does not know, and if it does, it may not be announced. Because of the fear of asking for trouble, wall-hung boiler agents avoid it, resulting in the majority of owners do not know or feel its importance. When the owner renovated the water and electricity, he also left out the matter of burying reserved double-core wires/telephone lines. They didn't know that the thermostat had this energy-saving function until the home decoration was finished or the stove burned in winter was heartbroken. At this time, it was too late to take the wire. They took the open wire for tens of thousands of dollars regardless of the effect of home decoration. For a luxury thermostat with wireless remote control, the price is too high and it is rare in China. According to Shanghai * * Company, the general agent of Italian IMITER in China, this company is the largest professional manufacturer in Italy and the only company producing temperature control products in the world, with only 50 imported units in history. Other brands will not deviate too much.

Fourth, although the thermostat agent has kept the price very low, far lower than that of the wall-hung boiler agent, it is still not low, and many owners should consider it before buying it, especially when moving back. Take one-week electronic programming as an example, the production cost of each brand scale is likely to be equivalent to more than RMB 100, while the agency price in China is more than 20 euros, which is equivalent to customs duties, value-added tax, import agency fees, exchange rate, etc. And in China, it is more than 300 yuan, not more than 400 yuan. The retail price for users is mostly seven or eight hundred yuan, not less than six hundred yuan. For small-scale pure imported products with small output scale, the profit of each process unit is reasonable, but for some users, the heating cost in a winter is two or three thousand yuan (the area is less than 100 square meter), and it will be nearly seven or eight hundred yuan for the first time, which is a bit stressful, or a bit considered. In fact, it can be recovered in one winter, and the effect will begin in the second year. For the rich, the fundamental consideration is not the few hundred dollars, but convenience and peace of mind.

In the past five years, basically no low-cost, practical, retail-oriented, domestic brands of wall-hung boilers are equipped with thermostats. The main reason is that the production and sales volume is too small and there is no brand support. All domestic wall-hung boilers adopt imported accessories. Imported wall-hung boilers will not use domestic thermostats in the price drop, and it will also lose the possibility of bulk purchase by wall-hung boiler agents. The thermostat market can't be raised, and the total amount is not enough to bargain with the Japanese. In fact, some imported thermostats are made in China. For example, typical foreign brands, such as Honeywell's domestic products in the United States, are mostly produced in Tianjin, and very few are commissioned by some factories in Canada and Britain. Someone set up a factory in Tianjin to disassemble and reassemble the second-and third-rate aging production lines, unskilled operators and domestic low-cost electronic components, and then label them with Honeywell. These things go round and round abroad, and according to completely formal procedures, they will flow back to China at a high price. Our compatriots still think that they enjoy American high-quality civil science and technology products at the same level as Boeing f 16 accessories. What's amazing is that Honeywell never admitted that what he sold to China was made in China at the official scene, and he also brought a bunch of documents to prove that it was made in the United States, Canada or Britain. I don't know what its Tianjin factory is for, but it is sold there in China! The author asked a friend of Honeywell China for verification on this matter. My friend said with a smile on the phone that the models made in China factory will definitely not be sold to Italian, German, French and other countries. Fortunately, at present, there is no similar incident in the wall-hung boiler.

Based on the above three points, the factors of pre-delivery preparation, installation of wall-hung boiler agent company and installation of thermostat agent company have not changed in a short period of time, and the market situation cannot be improved. Temperature controller has a large market space, but it is difficult to cultivate and develop the market. A plan that we are working hard now and may basically achieve our goal in 2006 is that the solution is to meet each other half way. First, I hope that the majority of owners will form pressure after understanding the situation. Before handing over the house, the developer will pre-install all simple "big knob" thermostats with the price lower than 100 yuan, and change the backward water temperature control into real-time room temperature control, which is not very stressful for the developer. Step 2: After the owner moves in, according to his own economy and the actual demand of daily heating, he decides whether to replace the simple "big knob" thermostat with a medium and high-grade programmable intelligent thermostat. The wiring has been completed, which will not affect the damage to the existing wall and wiring. It is simply to put two screws first and then two screws. Even if you don't replace it with an intelligent thermostat, the gas will be reduced. This plan is not a good one-step solution, but it is still in line with China's national conditions.

Introduction of temperature controller for wall-hung boiler.

The wall-hung boiler has a very useful option-thermostat. Make an introduction here to attract everyone's attention, so as not to think of it and regret it after renovation. The panel adjustment of all wall-hung boilers can only adjust the water temperature, that is, the water temperature ranges from 35 degrees Celsius to 85 degrees Celsius. Its relationship with room temperature is extremely difficult to calculate. The temperature controller (thermostat for short) is an accessory to solve this problem. Just adjust the room temperature to a few degrees. For example, twist it when you go out to prevent freezing, and twist it to 20 degrees Celsius when you come back, while the wall-hung boiler will make the indoor temperature range from 5 degrees Celsius to 10 degrees Celsius when no one is around, and 20 degrees Celsius when someone is around.

There are two types of thermostats:

One is manual, and it is marked with antifreeze 5 degrees Celsius → 10 degrees Celsius → 15 degrees Celsius →20 degrees Celsius →25 degrees Celsius → 30 degrees Celsius.

Just like air conditioning, if you adjust a temperature at will, the indoor temperature will be constant at this temperature.

Second, the thermostat is programmed for more than 7 days, and the program is programmed to start, close, raise the temperature and keep the constant temperature according to your weekly life rules. For example, as soon as I go to work in the morning, the wall-hung boiler will automatically turn off, and when I get home at 6 pm, the wall-hung boiler will start to run automatically at 5: 40. Walking into the house, it's already 20 degrees Celsius. When you fall asleep, the room temperature automatically jumps to 16 degrees Celsius. These changes are all preset by you.

The thermostat is installed in the crowded living room. Like the air conditioning switch in the office, it is wired. When decorating, leave a hidden wire pipe from the bottom of the wall-hung boiler to the living room, and leave two multi-strand glue lines inside. If you don't make a reservation, you can only use the open line in the future.

Imported thermostat, manual about 100-200 yuan/set, programming 500- 1000 yuan/set, using thermostat can obviously save 10%-30%.

Every wall-hung boiler manufacturer does not produce temperature controllers, so the so-called original factory is OEM. Yima's thermostat factory is imit in Italy, and most Italian brand wall-hung boilers use imit thermostats.

The main foreign thermostat manufacturers are Siemens, Honeywell and imit. The thermostats of the first two companies are mainly air conditioning and refrigeration. Onlymit is a professional factory for heating thermostat of wall-hung boiler.

All European products or joint venture products have a thermostat interface at the bottom of the wall-hung boiler. Japan-Korea series has no interface.

The advantages of using a thermostat are:

1, the operation is simpler and clearer, and the room temperature can be directly adjusted;

2, more fashionable and graded;

3. Cost saving, one heating season is enough to recover the cost.

Take a house of 100㎡ as an example, the cost of cooking, bathing and heating in each heating season is as high as 2,400 yuan, and the cost of cooking and bathing in 360 yuan accounts for 2,040 yuan, which is 6 12 yuan by saving 30%. It can be seen that the cost of the furnace can be recovered in ten years and the cost of the thermostat can be recovered in one year. Therefore, it is necessary to install a thermostat. Compared with programmed solar terms, programmed solar terms are better than artificial solar terms.

These two thermostats vary from person to person.

Manual: it is suitable for people who have irregular working hours and need to adjust the room temperature at any time or have old people and children at home. Because manual operation is simple, just like turning on and off the lights, just count them.

Programming: suitable for families with fixed working hours, because the room temperature will change according to the set program, and people who can't program can't change it. The programming method is to press different buttons according to the instructions on the LCD screen and English prompts. It takes about 10 minutes to edit once, but this thermostat has the best energy saving effect.

How to buy?

You don't have to buy it before you move in. Just pay attention to embedding the connecting wires when you decorate, and then choose to buy it when you move in, usually including installation but not wiring. Therefore, it is very important to reserve the thread, and we will buy it later.

How to wire the thermostat

There is a thermistor on the thermostat, and its resistance changes with the temperature. When the resistance changes to a certain calibration value, the relay can switch to control the start and stop of the wall-hung boiler.

First, the choice of temperature controller installation position

1, the operation here is simple;

2. A place that can cover the average temperature;

3. Places where people are active (such as living rooms);

4. Places that can avoid cold sources and heat sources;

That is to say, the installation position should be far away from the radiator and doors and windows, otherwise the wall-hung boiler will stop as soon as it gets hot and start as soon as the doors and windows are opened.

The installation height is about 1.4m (at the same level as the switch of the lamp), and the distance from the doors and windows is more than 0.8m ..

5. Pre-embed the square box in the selected position, and lead the conduit from here to the wall-hung boiler.

Second, the wiring position of the wall-hung boiler

1, left and right at the bottom of the wall-hung boiler, and choose any connection port;

2. A square wire box is embedded, and a round hole is arranged in the middle of the box cover;

3. Multi-stranded flexible wires with a wire diameter of 2×0.75 or more are used for threading (telephone wires and lamp cap wires are acceptable, but not both). The threading room is reserved for 0.5m, and the wall-hung boiler is reserved for 1 m..

4. Wrap the reserved thread into a ball and put it in the box, and then seal the box with hard foam of the same size (to avoid being pulled).

Three, the decoration is completed, the wall-hung boiler can be purchased and installed at any time after normal use.

Fourth, the simplest thread-leaving method.

1. After the thermostat is installed on the ground, open a small groove (to the depth where the wire can be buried), place the wire along the wall until it reaches the bottom of the wall-hung boiler;

2. Open a small slot from the wall of the wall-hung boiler to the position where the wire is to be placed, and bury the wire.

3, the line in the wall trough should be nailed with a small line card;

4. Tu Ping's groove;

5. The wire diameter is 2× 1.0, as long as it is continuous.

The simple method does not affect the laying of wooden floors or floor tiles, just be careful not to let the decoration workers disconnect.

Because of the different apartment types, you can't tell them apart. When decorating, you may wish to do your own wiring, and it is also a pleasure to practice your hands and brains.

Verb (abbreviation of verb) Selection of temperature controller

Any manufacturer's thermostat can be used, as long as the voltage is below 6v. The advantage of buying a thermostat from a wall-hung boiler manufacturer is that it is conducive to warranty. Otherwise, the thermostat will cause the wall-hung boiler to malfunction, and neither company will repair it, so you will be in trouble.

There is no compatibility problem with the thermostat, and there is no voltage manually. The programmed installation of two No.5 batteries can be used for two years, and the voltage is 3v.

Does the wall-hung boiler need a water purifier?

The wall-hung boiler is divided into two systems, one is heating and the other is hot water. The heating system does not need a water purifier, and the principle is discussed in another article. Whether sanitary hot water is needed varies from person to person. The place where sanitary hot water scales is the outlet of shower nozzle and faucet. If the water quality is hard, there will be scale and glistening at the outlet of the nozzle or faucet every week. Elimination method, a few drops of scale remover can be eliminated, and a bottle of scale remover can be used for two years. For wall-hung boilers, no water purifier is needed. I used an American-made water purifier, which cost more than 3,000 yuan. I was laid off after only one month. The reason is that using 1 ton pure water must waste 3 tons of tap water, which means that the water purifier is only used for eating, and the price is similar to that of mineral water, but it is too wasteful to take a bath, which is equivalent to taking a bath with mineral water. In practical use, it is necessary to add pure water to the boiler under pressure (manually or through a water pump), and you need an additional pump to realize the ideal. There is no need to install a water purifier on the wall-hung boiler in theory and practice.

Scaling: calcium and magnesium that are easy to scale are dissolved in water in the form of ions and are invisible. They have certain solubility in water, and the solubility of most substances increases with the increase of temperature. Scaling is due to the decrease of solvent amount and the precipitation of calcium and magnesium compounds in the form of compounds.

For example, a cup of tap water with 100g is put in the air, and calcium and magnesium ions with 1g are dissolved in the water. When 90g of water remains after evaporation, 90g of water can only dissolve 0.9g of calcium and magnesium ions, and then 0. 1g of calcium and magnesium ions will precipitate to form scale, so there will be scale (white) on the side between the water surface of the glass and the air. If there is no evaporation (solvent water is reduced), there will be no scale precipitation. The heating system of wall-hung boiler is a closed system, and there is no evaporation, so it is difficult to generate scale.

In the hot water system, tap water is heated and turned into hot water. When it flows out from the nozzle or faucet, the amount of solvent (water) decreases due to the evaporation of water vapor, so there is scale precipitation, but no scale is generated in the pipeline.

So don't worry about the scaling problem of the wall-hung boiler.

-Pick it.