With the sharp drop in temperature and the arrival of the peak heating season, the gas wall-hung boiler is one of the most common heat source equipment for home heating. The gas wall-hung boiler originated in Europe and has a history of more than 100 years. It mainly relies on gas to heat water, and the hot water is dissipated through the radiator, so as to achieve the purpose of heating. The gas wall-hung boiler has a powerful central heating function in the home, which can meet the heating needs of multi-bedroom.
1 What is a gas wall-hung boiler
The full name of a gas-fired wall-hung boiler is a gas-fired wall-hung heating boiler, which originated in Europe and has a history of nearly 100 years. The main producing country is Germany , the United Kingdom, Italy, etc., most families in European countries use wall-hung boilers for heating, while Chinese families use central heating, and the development of individual free heating is relatively slow. Due to the long history of development, mature technology and good quality of European wall-hung boilers, they have become the darling of the market.
The gas wall-hung boiler has a powerful central heating function in the home, mainly by pre-mixing gas and air and then igniting and burning, heating the heat medium water through the heat exchange system, and then heating the air through the cooling terminal to achieve heating Or the purpose of heating, and its thermal function is affected by two factors, the local climatic conditions and the thermal insulation of the building.
2 How to use the gas wall-hung boiler
1. Water injection
After installing the gas wall-hung boiler, inject a certain amount of water into the gas wall-hung boiler, Fill the boiler with water in the water supply valve, and pay attention to observe the water pressure gauge of the gas wall-hung boiler. When the pressure reaches 1.5bar, that is, 1.5kg, the water injection can be stopped.
2. Turn on the gas wall-hung boilers
Turn on the power switches of all gas wall-hung boilers, and let the gas wall-hung boilers connect to the power and start working.
3. Mode selection
Gas wall-hung boilers generally have two different modes: heating and domestic hot water, so there will be two modes on it. Select the function, in winter, we can use the gas wall-hung boiler to provide heating and domestic hot water functions, and the limited supply of hot water can also be switched according to the user’s choice. If it is summer, you can set the gas wall-hung boiler to be in standby mode, and the hot water mode will only be activated when hot water is used.
4. Set temperature
There are two types of gas wall-hung boilers, one is single-function, only heating, the other is heating A gas wall-hung stove integrated with the bath. If it is dual-function, you need to set the temperature for both, if it is radiator heating, the set temperature is 80 degrees, and if it is floor heating, the set temperature is 60 degrees. The set temperature of the domestic hot water part is preferably not higher than 50 degrees, because we only need 42 degrees for bathing.
5. Antifreeze measures in winter
The gas wall-hung boiler can be powered on for a long time, especially in winter, if the gas wall-hung boiler or heating has been filled with water, it must be The gas wall-hung boiler is provided with antifreeze, and sufficient electricity and gas are prepared to avoid freezing of the radiator and boiler water pump, heat exchanger and other components. Various brands of heating gas wall-hung boilers are equipped with antifreeze function. Refer to the manual.
3 How to install a gas wall-hung boiler
1. Installation conditions
Heating in the user’s home The system must be an independent system, that is to say, the home is a newly installed heating system, which is designed and constructed according to the independent heating method; Replace it with a high-grade fireplace.
Secondly, there must be a gas supply in the home; there is a suitable wall-hung boiler installation site to hang the equipment and ensure that the burning exhaust gas can be discharged smoothly.
2. Installation location
The location of the wall-hung boiler should first consider the requirements of smoke exhaust, rain protection, and frost protection; secondly, the direction of the supervisor should be considered Whether it is reasonable and the requirements of the owner for the overall perception of the building. Because gas wall-hung boilers mostly use natural gas, under normal circumstances, gas-fired wall-hung boilers should be installed in locations that are easy to operate and easy to maintain, mainly including: kitchen, equipment room (balcony), exterior walls, etc. Special reminder: If the wall-hung boiler is installed outdoors, it is necessary to perform antifreeze treatment on the wall-hung boiler and other ancillary equipment.
3. Installation procedure
The wall-hung boiler plays the role of heating through the radiator, floor heating and other terminal equipment. Procedures such as grooves, punching, and pipe connections need to be carried out simultaneously during the decoration, while the wall-hung boiler can be installed after the completion of the home decoration.
4. Installation principles
The five principles of “one near, two dry, three full, four inclined, and five good” should be followed when installing the wall-hung boiler : Near, means that the location of the wall-hung boiler is as close as possible to the heating system, air source, water source, power supply, and exhaust outlet; dry, means to choose a well-ventilated, indoor dry location; full, means the supporting facilities required for the operation of the wall-hung boiler The accessories should be installed completely, such as indoor temperature controller, tap water pressure reducing valve, gas filter, water filter, etc.; oblique, that is, the chimney must be installed outward and inclined downward within 5 degrees to avoid rain, snow or condensation. It is better to backflow into the wall-hung boiler, that is, the installation materials of the wall-hung boiler are better, and inferior pipes, valves, and pipe fittings cannot be used.
5. Installation requirements
(1) The wall-hung boiler should be installed and fixed on the wall. Water pipes, line pipes, gas pipes and other pipes, so as not to be broken when installing the wall-hung boiler.
(2) When drilling and fixing the hook on the back of the wall-hung boiler, use a spirit level to measure it, and do not observe it with the naked eye, so as to avoid the wall-hung boiler being tilted and repeatedly drilling holes, which will cause the wall-hung boiler to be unreliably fixed. If the wall is dry-hanging marble, the general contractor must be informed to reserve a fixed point for the wall-hung boiler in advance.
(3) When installing the smoke pipe, the smoke pipe must be inclined downward horizontally at 3-5 degrees to prevent rainwater and condensed water from pouring back into the wall-hung boiler and causing damage to the wall-hung boiler. The size of the hole reserved for the smoke pipe is generally a round hole with a diameter of 120mm. In principle, if all the pipes are straight sections, the longest length is 4m. For each additional pipe elbow, the straight section will be reduced by 1m accordingly. After the installation of the wall-hung boiler, it must be ensured that: 10cm left and right, 30cm up and down, and 60cm in front of it without debris and other equipment, so as to facilitate operation and maintenance.
(4) When installing the main heating pipeline, gas pipeline, and domestic water pipeline, it is necessary to ensure that the gasket and raw material tape are filled in place to prevent leakage and leakage. Installation requirements of the smoke pipe: the length of the smoke pipe is more than 1 meter, and a hanger needs to be installed when it extends out of the outer wall.
4 Cleaning steps of gas wall-hung boiler
1. Outer wall cleaning
There is no special way to clean the outer wall of gas wall-hung boiler, as long as Usually, you can wash it with a cloth. Be careful not to clean with corrosive detergents to prevent the wall-hung boiler from rusting.
2. Gas source cleaning
If the gas source is natural gas, it is generally not necessary to clean it for 3 years. Because it is clean energy, the combustion is relatively sufficient, and there are no impurities. However, if you use artificial gas, you should pay special attention to cleaning the nozzle at least once a year, because the gas has a lot of impurities and is very oily, which is particularly easy to block the nozzle. When cleaning, it can be cleaned with a soft brush, and then wiped with a dry soft cloth or paper towel.
Three. Internal pipe cleaning
1. Clean water
After connecting the cleaning equipment to the wall-hung boiler, use clean water Medium cycle cleaning for 10 minutes, check the system status, whether there is leakage, and clean the floating rust at the same time. When cleaning, first discharge the original water in the pipeline from the water outlet, then put it in clean water, pressurize it with the cleaning equipment, and then release it, and repeat it for many times to release the sewage in the pipeline.
2. Stripping and anti-corrosion cleaning
Add surface stripping agent and slow-release agent to the circulating water of the cleaning tank according to the proportion, and circulate for 20 minutes to make the dirt and the parts cleaned. At the same time, anti-corrosion treatment is performed on the surface of the object without scale to prevent the cleaning agent from corroding the cleaning parts during descaling cleaning.
3. Descaling cleaning
Add the configured descaling cleaning agent to the circulating water of the cleaning tank in proportion to clean and remove the scale, and determine the cleaning cycle according to the amount of scale. After confirming that all the dirt has been cleaned, go to the next cleaning procedure.
4. Passivation coating treatment
Add passivation coating agent to carry out passivation coating treatment on the cleaning system to prevent corrosion of pipelines and components and new rust formation.
5. Water Circulation Cleaning
This step is to rinse out the residual liquid in the system to prevent the residual liquid from contaminating the water source.
6. System recovery
Return the boiler system to normal working condition, and check whether the water supply is normal.
5 How to maintain the gas wall-hung boiler
1. Clean the appearance
Wall-hung boilers are generally placed in the kitchen, and they will Dust accumulation, stained with oil, usually need to clean the wall-hung boiler shell, you can use a towel or brush when cleaning, you can cover the wall-hung boiler with a dust cover to prevent dust accumulation.
2. Reduce the hazard of scale
Scale will greatly affect the thermal efficiency of the wall-hung boiler. The life of the furnace, in order to avoid the scale problem as much as possible, it is recommended to choose a plate-replaceable wall-hung boiler. The water temperature should not exceed 65 °C when using water, because the high temperature is easy to scale. If the water quality is hard, you can install a water softener to soften the water quality. limescale.
3. Pay attention to full water maintenance
The water inside the heating system will not interact with the outside water, and full water maintenance can minimize the oxygen content of the pipes, Prevent oxygen corrosion and prolong life.
4. Regular internal cleaning
In the process of home heating, the wall-hung boiler will circulate hot water, and there will be impurities left in the heating equipment for a long time. Cleaning will lead to unsmooth heat exchange, excessive pressure of the water pump, and shorten the service life. You can clean the heating equipment connected to the wall-hung boiler in the early stage of installation, and ask professionals to clean the wall-hung boiler in one to two years to prolong its life.
5. Pay attention to equipment protection
When the weather is relatively warm, the natural gas wall-hung boiler is usually not used, and the power needs to be turned off at this time. Yes, but it also needs to be powered on once a month. If the user does not use the hot water function of the boiler in non-heating seasons, he or she can choose to turn off the heating function of the boiler or turn off the power supply of the boiler. If the power is turned off, it is necessary to ensure that the boiler power switch is turned on once a month to prevent the water pump from rusting. It is also best to cover the equipment with dust-proof things to reduce the damage of dust to the equipment. If there is dust, you need to use a clean and soft cloth to wipe it.
6 Differences between gas wall-hung boilers and electric wall-hung boilers Hot water is heated through the water tank, while the electric wall-hung boiler uses electric heating components to generate heat for heating through current exchange. There are essential differences between the two in terms of heating methods.
2. Energy consumption
Objectively speaking, the thermal conversion efficiency of electric heating devices is higher than that of gas. The furnace is better than the gas, and the electric energy is similar to the gas control system, and a frequency conversion series has been developed to make the energy saving more prominent.
However, from the actual usage situation, the energy consumption of gas-fired wall-hung boilers is lower than that of electric wall-hung boilers. This is because electrical appliances with higher power usually have very large losses, resulting in heat conversion. Efficiency is reduced. Moreover, to keep the electric wall-hung boiler working 24 hours a day may affect the entire circuit load, and there are serious safety hazards, especially during the peak period of electricity consumption, it is difficult to ensure its normal use.
3. Scope of application
The gas wall-hung boiler can provide heating and domestic hot water at the same time, heating is comfortable, hot water is stable, and the heating system can choose a radiator (radiator) or floor heating, users with pipeline natural gas usually give priority to gas wall-hung boilers. The function of the electric wall-hung boiler is roughly the same as that of the gas-fired wall-hung boiler. It is generally suitable for self-built houses without natural gas and central heating network coverage.
4. Safety factor
Safety is an eternal theme that people care about. The safety of the boiler is not only in the quality of the boiler, but also in the safety of some gas pipelines and gas transportation. Electric heating wall-hung boilers are very safe. Nowadays, when electric wall-hung boilers are used in households, leakage protection switches are generally installed in the main switch box of the household. Once leakage occurs, it will trip immediately.
5. Price and later consumption
This is undoubtedly the advantage of gas wall-hung boilers, relatively low product prices and low natural gas prices , making the gas wall-hung boiler very popular with consumers. However, due to the high electricity costs in some places, the popularization of electric heating has been seriously hindered. According to the current situation, power companies in various regions have successively introduced corresponding policies to encourage people to use electric wall-hung boilers.
7 Tips for buying a gas wall-hung boiler
1. Look at the power
There are various power options for the same brand. High power, waste of money, waste of energy. The power selected is small, and the waste of funds and energy is small, but it does not meet the requirements for use. Generally, the heating power required per square meter is about 120w-180w, and it varies according to the room type, structure, and building materials. What kind of power should your house be calculated according to, and then measure a rough overall power.
Usually, the heating area will be between 60%-70% of the building area. If it is a 150-square-meter apartment, its heating area will be between 90-105 square meters. We calculate according to the heating area of 100 square meters, it is estimated that the heating power of 15kw is required, plus the usual domestic hot water demand, basically we should choose a heating furnace of 18kw.
2. Look at energy saving
Since the wall-hung boiler will be used throughout the winter, you need to pay special attention to the energy-saving of the wall-hung boiler, and choose one A wall-hung boiler with good energy-saving effect can not only reduce cost consumption, but also improve the quality of life.
3. Look at accessories
In order to achieve the most comfortable and convenient use, you should choose high-quality accessories. Some brands of wall-hung boilers have complete accessories to meet the needs of various customers. The most important accessory is the thermostat. With it, it can perform zone temperature control, timing switch, etc., which is energy-saving and environmentally friendly.
4. Look at the brand
Generally speaking, if you choose a good brand, you choose safety, save gas, choose worry, and choose Serve. When all manufacturers sell their products, they can spit lotus out of their mouths and make all kinds of promises, but there are not many that can actually be done according to their promises. Because there is not enough capacity and financial resources, it is impossible to support after-sales service, nor can it guarantee the timely supply of accessories.
5. Look at after-sales service
The life of the wall-hung boiler is more than 15 years, in addition to the two-year warranty, there is at least 13 years of paid maintenance. 13 long years without good service to keep you safe. This choice cannot be listened to by the manufacturer, but must be checked. First, look at the size of the company, second, warehouse accessories, third, maintenance sites, and fourth, user feedback.
