Overview of gas boilers Viessmann

Having an effective heating system is crucial for maintaining a warm and comfortable home. Because of their affordability and dependability, gas boilers are a preferred option for a lot of homeowners. Viessmann is a well-known brand among the many gas boiler options available because of its reputation for excellence and innovation.

Viessmann gas boilers are a popular choice for anyone wishing to upgrade their heating system because of their cutting-edge technology and exceptional energy efficiency. Your home will always be warm with a Viessmann boiler, which will also save you money on energy costs and lessen your environmental impact.

The adaptability of Viessmann gas boilers is one of their main advantages. For a variety of heating requirements, Viessmann provides a selection of boiler models that can be used in both small and large family homes. There is a Viessmann boiler that suits your needs and available space, ranging from smaller wall-mounted units to larger floor-standing models.

Viessmann gas boilers are renowned for their dependability and longevity in addition to their efficiency and versatility. Viessmann boilers are made to the highest standards with premium materials, guaranteeing years of trouble-free operation and providing homeowners with peace of mind that their heating system is long-lasting.

We’ll examine some of the main characteristics and advantages of Viessmann gas boilers in this post to help you see why they’re a popular option for home insulation and heating all over the world.

In the realm of heating and insulating your home, choosing the right gas boiler is crucial. In this article, we delve into the world of Viessmann gas boilers, known for their efficiency, reliability, and innovation. From their compact designs suitable for small spaces to their high-performance models catering to larger households, Viessmann offers a diverse range to meet various heating needs. With a focus on energy efficiency and eco-friendliness, Viessmann boilers incorporate advanced technology to minimize energy consumption and reduce carbon emissions, aligning with modern sustainability goals. Whether you"re looking to upgrade your existing heating system or install a new one, exploring the features and benefits of Viessmann gas boilers can lead to a warmer, more energy-efficient home.

About the manufacturer

The family business Viessmann Werke GmbH& Co. KG is the owner of the "Viesmann" trademark. Since its founding in 1917, the company has produced heating radiators, boilers, water heaters, and other heating equipment.

OOO Viessmann, Viessmann’s official representative office in Russia, is how the company is represented on Russian Federation territory. There is another factory in Lipetsk that produces heating equipment in accordance with German standards and is run by the parent company. The company has made a name for itself over the course of its operations as a producer of pricey, but by domestic standards, incredibly functional and dependable equipment.

The boilers are actually among the most dependable products available in the market. Wall-mounted Vitopend 100-W units from the first generation are found in private homes; they have been trouble-free for more than 12–14 years. Practically every Viessmann model is only marginally less efficient than some of its analogs in terms of economy, but it also meets strict safety regulations, has numerous control and measurement systems, is environmentally friendly, and is useful.

For instance, contemporary gray cast iron alloys are used in the heat exchangers of floor-standing gas boilers. These alloys have all the benefits of traditional cast iron, such as resistance to corrosion and durability, longer cooling times, but they also do away with its primary drawback: mechanical damage and sensitivity to temperature changes.

All models, including the most affordable ones, utilize modulating burners, which enable continuous operation at minimum output—the ideal mode of combustion. This has an impact on the economy as well as the boiler’s lifespan because it lowers the clocking frequency, or the boiler’s on-off cycle.

All models, including floor models, feature a built-in programmer that can be used to set a boiler operation pattern for a day or a week. This greatly simplifies operation and allows you to save money. For example, you can set the temperature drop to 19 °C while you sleep. All models have a wide range of functionality and adjustable settings. All current safety features, such as those that prevent overheating, freezing, stopping the circulation pump, backdraft, auto ignition, and auto-diagnostics that provide an error code in relation to the specific cause of the failure, are also included in any of the models.

Even though the equipment is regarded as a benchmark in the global market, there are real drawbacks as well. These are strict specifications for commissioning, installation, connection, and operating conditions above all else. It is preferable to connect Wisman boilers through a voltage stabilizer even though they can all handle coolant of any quality. In actual conditions, automatic failure is the most common malfunction, even with factory protection against voltage fluctuations.

Additionally, it’s critical to maintain the boiler room spotless; failing to do so will necessitate an annual boiler cleaning (at least once every three to four years).

Otherwise, Viessmann boilers run trouble-free for 8, 10, or even 15 years provided the installation specifications and operating conditions are satisfied.

Reviews of owners of gas boilers Viessmann: advantages and disadvantages

Advantages	Disadvantages
Reliability due to high quality modern alloys, technical solutions and build quality	High cost – from 34 to 500 thousand. rub.
High technical characteristics	Vulnerability to voltage fluctuations
Functionality, the availability of the possibility of programming the mode of operation	High requirements for installation and commissioning
Unlimited possibilities of system modulation: possibility to connect external temperature sensors, weather-dependent control, possibility to monitor and control via application	Despite the developed service structure and the presence of competent masters in almost all regions, the cost of calling a specialist and his work is quite significant, according to the owners" reviews usually from 5 ths. rub. Spare parts are quite rare and not always available in domestic warehouses
Availability of all safety systems available on the market	All models are exclusively energy-dependent – requiring connection to the power grid
Stylish design, allowing you to place even floor models in any, corresponding to the requirements , room	Absence of versions with output less than 29 kW among floor standing boilers
Quiet operation
Availability of both single-circuit and double-circuit models, including condensing models
Availability of models with a capacity of 300-600 kW, allowing to heat residential houses of any size, as well as industrial and commercial premises
All models have a high maximum allowable operating pressure, even models with a steel heat exchanger have a maximum pressure of 3 bar.

The best and most famous models: characteristics and prices

Wall-mounted

Vitopend 100-W A1HB

The Viessmann single-circuit convection boiler unit is the most affordable and widely used type of gas boiler available. offered in 12-34 kW capacity ranges. It stands out for having one of the lowest gas consumption in the price range, an efficiency of 91%, nearly silent operation, a modulating burner, and the inclusion of a programmer. Although the heat exchanger is made of steel, it can withstand working pressures of up to 3 bar. Because of a unique feature, the model only needs to connect the supply and return lines—complex piping is not needed. This is due to the expansion tank.

Additionally, every safety feature that is available is offered, including auto-diagnostics, circulation pump blocking, freezing and overheating protection, and more. Because of its elegant appearance and small size, the boiler can be stored in a kitchen cabinet because it doesn’t need the extra room around it for servicing.

The majority of Wisman models have the same drawbacks: high operating condition requirements and susceptibility to voltage fluctuations (the protection mechanism is rated for 170–253 V, which is not always enough). Specifically, the most common issue is the burner module and flame sensor becoming clogged, which causes the automatic to display error F4. It is imperative to ensure that the boiler is cleaned on a regular basis and to keep an eye on the state of the gas filter.

Please be aware that the model is available in three generations: A1HB001, A1HB002, and A1HB003. Similar, but two-circuit versions of the Vitopend 100-W A1JB are also available.

Vitodens 100-W

Though far more effective and cost-effective than the previous model, the design and functionality are similar. Models with two circuits have the index B1KC, and models with one circuit, B1HC. According to the condensing principle of operation, there must be a second heat exchanger to store the condensate heat created when the combustion waste products cool. The result is that the flue gas temperature is between 35 and 60°C, and a large portion of the heat is no longer blown up the chimney. With an efficiency of 108.7%, this obviously has a significant effect on efficiency as well.

It is the exact replica of the previous convection Vitopend 100-W in terms of functionality and safety. The model also has every one of the previously mentioned drawbacks. The only distinction is that the condensing boilers’ headband of the chimney does not form ice due to the lower temperature of the flue gases, which hinders the removal of combustion products. The high price, which in Russian conditions does not always recover the savings, is one particular drawback.

Every aspect of condensing gas boiler operation and selection criteria

Vitodens 200-W

The most sophisticated and useful condensing model available. Features include a cylindrical burner with updated automation, even higher efficiency of 109%, and a liquid crystal touch screen display with numerous settings for easy and intuitive operation.

You can use an application on the internet or send commands via SMS (regardless of location). It is noteworthy that it is even quieter than the Vitodens 100-W, which is almost silent. Based on installation experience and user input, the model is adjusted for variations in home gas pressure.

All of the models in our practice have been operating flawlessly for more than five years. However, we advise using a voltage stabilizer to connect the boiler to the network only in order to avoid any negative effects from occurring. The more powerful circulation pump is the main source of the increased electricity consumption, which comes at a very high cost.

Floor standing

Vitogas 100-F

Known for its floor model, this Viessmann gas hot water boiler is an excellent choice for heating a private home. It is distinguished by reference reliability; during the course of its more than 14 years of operation, there have been essentially no service calls, and none of them have been connected to the expensive, major components breaking down. Gray cast iron, which has a 25–30 year service life and is heat-resistant, is used to make heat exchangers.

The high efficiency of 92%, which is among the highest indicators among floor-standing atmospheric gas boilers, is another key distinction. Modern alloys, heat exchanger complexity, smooth modulating burner, thermal insulation, and the presence of a noise layer all contribute to this efficiency. One of the few features of a factory-equipped floor convection boiler is the ability to program the mode of operation for one or two days or one week.

Offers the option to connect more external temperature sensors and offers remote control through an application.

The aforementioned specifications for operation, weight, and cost are the only drawbacks for domestic customers. Every version is solely single-circuit.

Vitoplex 100

Expensive combined boiler that runs on liquid fuels like kerosene and diesel in addition to natural gas. It can be identified by a unique furnace chamber device. The installed burner determines the kind of fuel used. installed the burner without disassembling the boiler on a designated mount on the front panel. Available in 150–2000 kW capacity versions, this product is best suited for large homes, apartment complexes, or commercial spaces. 94% efficiency in its entirety.

Possesses a similar automation that lets you connect more external sensors, adjust numerous settings, and operate the boiler remotely.

Official website: where to see all models and operating instructions

The manufacturer’s official website in Russia is located at https://www.Viessmann.ru.

You can view a description of every model that is currently available by going to the "Products" section. Electronic versions of the comprehensive instruction manual, installation and adjustment guidelines, technical passports, and certificates are included with every model. Each model’s handbook includes detailed descriptions of its features, including installation instructions, an algorithm for activating and adjusting operation, maintenance protocols, and schematic illustrations.

What model of boiler in the end is better to choose

With its lowest price and highest demand, the Viessmann Vitopend 100-W A1HB wall-mounted convection model is the most widely used. Even with all of the manufacturer’s hallmarks still intact, the Vitopend 100-W A1HB’s dependability is still marginally lower. This is particularly true when considering the disregard for routine maintenance, the use of a voltage stabilizer during connection, and the premature cleaning or replacement of the gas filter. Even in the worst circumstances, completely trouble-free operation for six to ten years without maintenance is not unheard of, though.

Selecting the more adaptable floor standing Vitogas 100-F is a better option in terms of dependability if the budget is not too tight and the boiler room has sufficient space (beginning at 8 m 2). Condensing models should only be purchased if you have a sufficient heating budget and for use in low-temperature systems, such as underfloor heating, radiators with more sections, and coolant temperatures up to 50°C.

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Known malfunctions of Wisman boilers

There are very few service calls where a major breakdown is resolved, as we have already indicated.

Automation (control unit) failure is the most frequent type of failure. Even though the reason for a failure cannot always be determined, a sizable voltage drop is typically the source. Since poor electrical contact, overloads at the transformer substation, connecting on the adjacent line of a strong electrical consumer, etc. are the causes of voltage drops, it is not possible to directly affect this. Using a voltage stabilizer to connect the boiler is the only protective measure.

The temperature sensor is another component that is prone to failure; this is especially common with Vitopend 100-W models.

Frequently asked queries, which aren’t always about breakdowns, are (click to expand):

It is highly likely that the fuses are blown or the diode bridge is burned out if the boiler does not turn on at all (the display is inoperable and does not respond to button presses). There has been a power surge. The first thing to do is clean the combustion chamber of soot, dust, and other debris. Then, carefully clean the igniter if the controls function but the burner does not ignite or there is no spark.

How to clean a gas boiler on your own: comprehensive guidelines

Whistling or hum may become more frequent over time for a number of reasons, including wear on the turbine fan bearings, a lack of water in the system, and clogging of the heat exchanger scale (which typically occurs after using dirty hard coolant for at least 4-5 years). In this instance, it is crucial to distinguish between the apparent alterations and the initial noise that is typical of any boiler’s operation.

Water pressure used by Viessmann boilers ranges from 0.8 to 3 bar. 1.5–2 bar is the ideal working pressure in the heating circuit. During boiler commissioning, the operating pressure is set and then automatically maintained by the boiler. In the event that the pressure falls below the operating limits, water must be added to the system, and all assemblies and connections must be tightened. There is air in the system when there is an increase in pressure.

Most frequent error codes

A malfunctioning burner. usually brought on by the boiler overheating, either physically or potentially. Check the amount of coolant in the system, the air’s presence, and the circulation pump’s functionality to rule out the issue. A faulty temperature limiter or a bad contact could be the cause if the issue continues.

No flame signal, malfunctioning burner. The flame sensor is the source of the error, not the burner itself. It is worthwhile to examine its state and, if required, clean it. It’s also important to monitor the shut-off valves, check the gas pressure, and pay attention to the ignition electrodes.

Automatic furnace unit not functioning properly. This error has to do with air exchange; specifically, it happens when the removal of combustion products or air intake is hampered. At -15°C and below, the most frequent cause is icing on the coaxial chimney’s headband. The freezing of condensate from combustion products is the cause of icing. It is sufficient to gently chip off the ice and think about insulating the chimney’s exterior or installing an anti-icing structure in order to get rid of this. It is worthwhile to investigate alternative causes of air exchange failure if the issue cannot be resolved.

There is no hot water being made. the temperature sensor on the tank water heater or the outlet temperature sensor opening. It is advisable to examine the sensor’s contacts; in the event that everything appears normal, the sensor is probably broken.

To reset an error, press MODE and OK at the same time until the "" indicator begins to flash. Sometimes a simple reset will fix the sudden error and stop the boiler, but even in this situation it’s important to remain vigilant and consider the reasons why it occurred.

Service

Like all gas boilers, the maintenance requirements are simple and straightforward:

1. Annually inspect all connections and assemblies of the heating system and the boiler itself.
2. Every 2-4 years it is advisable to mechanically clean the heat exchanger, combustion chamber and burner module (the manufacturer recommends to perform maintenance at least every 2 years).
3. Every 4-7 years we recommend to descale the heat exchanger of the boiler.

Every point can be completed either on your own or with the help of experts (which is, of course, safer and more efficient).

Prices: summary table

Model	Heat exchanger material	Available outputs, kW	EFFICIENCY, %	Cost, rub.
Wall mounted
Vitopend 100-W A1HB	steel	12-34	91	51 500-55 800
Vitodens 100-W	steel	4,7-35	108,7	117 000-118 900
Vitodens 200-W	steel	1,9-32	109	179 000-235 000
Floor standing
Vitogas 100-F	cast iron	29-420	92	85 000-514 000
Vitoplex 100	furnace steel	150-2 000	94	301 000-1 400 000

Model	Features
Vitodens 100-W	Compact design, high efficiency, low emissions
Vitodens 200-W	Modulating stainless steel cylinder burner, low operating noise
Vitodens 222-F	Integrated stainless steel storage tank, space-saving design

Viessmann gas boilers are an excellent option for heating and insulating your home because of their many features and advantages. Viessmann boilers are a leading competitor in the market because of their advanced technology, user-friendly design, high efficiency, and dependability.

The outstanding efficiency of Viessmann gas boilers is one of their main benefits; it enables homeowners to use less energy and pay less for heating. Viessmann boilers provide optimal performance and cost savings through precise combustion control and innovative engineering that maximizes heat transfer while minimizing fuel wastage.

Additionally, homeowners can feel secure in the knowledge that their heating system will continue to operate properly for many years to come because Viessmann boilers are known for their dependability and longevity. Viessmann boilers are made with high-quality materials and put through a rigorous testing process to ensure that they can withstand regular use and provide consistent warmth and comfort throughout your house.

The cutting-edge technology found in Viessmann gas boilers, which includes intelligent controls and digital interfaces to improve convenience and control, is another noteworthy feature. Viessmann boilers have programmable settings and remote access capabilities that enable homeowners to easily modify their heating preferences and track energy consumption in real-time, enabling them to maximize comfort and efficiency.

Moreover, Viessmann boilers have user-friendly features that make maintenance, operation, and installation easier. Viessmann boilers are easy for homeowners and technicians to set up, perform routine checks, and troubleshoot any issues that may arise because of their accessible components and intuitive interfaces.

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