Gas boilers Navien: opinions and reviews of consumers

In those places where there is a gas distribution line, gas equipment is used to create autonomous heating systems. Recently, the popularity of boilers of this type has increased significantly. As consumer reviews show, in apartments located in multi-storey buildings, it is best to install navien gas equipment. This is the most suitable option. The products of this company appeared on the market of our country relatively recently. However, she quickly gained popularity.

Navien is a company that is considered one of the largest enterprises in South Korea. The organization has established the production of energy equipment intended for use in domestic conditions. Judging by the reviews, gas boilers from this company are in no way inferior to heating equipment from other manufacturers known all over the world. The range of Navien equipment is quite large. However, a special niche is occupied by double-circuit boilers, which have a fairly long service life and are quite convenient to use.

Navien gas boilers: advantages

Consumer reviews show that Navien heating equipment has clear advantages and minor disadvantages. Among the advantages of gas boilers are:

1. Each model is energetically justified. In reviews, many consumers write that gas is an efficient and cheap energy source.
2. Navien wall-mounted double-circuit boilers are environmentally friendly devices. After all, such equipment only emits carbon dioxide, which is absorbed by various green spaces.
3. In addition, gas boilers of this brand are automated equipment. It is capable of working for a long time according to a predetermined program without failures.
4. In the production of Navien gas boilers, only modern technologies are used, which ensure sufficiently long service life without service checks.

Milestones

The official founding date of KD Navien is 1978. At this time, the production of gas boilers was launched. It is part of Kyung Dong, which was formed in 1967. At that time, it specialized in the production of climate control and heat-saving equipment, and only with the inclusion of the Navien company in its composition did it begin to develop and produce heating devices.

Its production facilities are located in South Korea and Japan, and its products are sold in Southeast Asia and the USA.
Not long ago, the company’s boiler equipment appeared on the domestic market. Date: September 25, 2022

Flaws

Also among the advantages, consumers highlight simplicity and accessibility of management. This makes working with the boiler comfortable and easy.

Of course, the reviews also indicate the disadvantages of such equipment. Navien gas boilers require constant power supply during operation . Of course, this problem can be solved. To prevent various power surges in the network, as well as to avoid problems associated with power outages, it is worth installing a stabilizer. You can use models with plug-in or built-in batteries.

Principle of operation

To determine the advantages and disadvantages of Navien gas boilers, it is necessary to understand the principle of their operation. Double-circuit heating equipment operates according to a standard scheme. Due to the absorbed heat, which is generated during fuel combustion, the boiler heat exchangers are heated. The circulation of the coolant, as well as water, occurs using a pump , which is built into the heating equipment system.
Air is forced into the combustion chamber. This process is carried out through a ventilation system, which is also built into the boiler. Oxygen enters the system through the chimney. This part is mounted in various models with a closed firebox.

It is worth noting that Navien products are made of stainless steel . This allows you to significantly increase the service life of wall-mounted gas boilers. After all, such a material is perfectly protected from corrosion and can withstand prolonged thermal loads, as well as thermal shocks.

Common malfunctions and their solutions

Errors in the operation of the boiler are displayed by corresponding codes on the control panel.

Among them:

• E01. Boiler overheating. Occurs when the circulation pump fails, or less often when the coolant filter is dirty.
• E02. Coolant circulation error. Indicates the formation of leaks in the system or the boiler itself (connections).
• E03. No flame on the burner. This indicates either a failure of the ignition coils or a lack of gas in the system.
• E04. Parasitic flame. There is a gas leak or a spark jumps between the flame sensor and the ignition electrodes.
• E05, E06. Open circuit (short circuit) of the extract air (heating water) temperature sensor. Occurs when the contacts close, most often due to the presence of condensation or other moisture on the board with the sensor.
• E07. DHW heating sensor failure. It is necessary to check the contact or quality of connection of the sensor.
• E08. Short circuit of the DHW heating sensor. The sensor or the entire controller needs to be replaced.
• E09. Fan failure (failure). Check the contacts and, if necessary, replace the fan.
• E10. Malfunction of the smoke removal system. Usually occurs due to blockage of the chimney by ice from condensation.

NOTE! There are other error codes that appear when certain problems occur. A complete list can be found in the user manual for this device.

Boiler design

The cost of heating equipment depends on several indicators. Thus, single-circuit boilers cost much less than double-circuit boilers. However, it is worth considering that the latter provide not only heating of individual rooms, but also allow you to save on hot water . After all, one of the circuits supplies hot water.

In general, Navien wall-mounted gas boilers consist of:

1. Cases.
2. Heat exchanger.
3. Burners.
4. Circulation pump.

Installation of Navien gas boilers is quite simple. As reviews show, it is enough to connect all the pipes to the mounted mixers. After this, they should be connected to the input to the heating system. That's all.

Connection

Gas connection pipe 1/2″ Heating circuit connection pipe 3/4″ DHW circuit connection pipe 1/2″ Dimensions (WxHxD) 440x695x265 mm Weight 28 kg Additional information smoke exhaust system pipe diameter 75/70 Before purchasing, check the technical specifications and equipment with the seller

Sources

• https://oteple.com/kak-rabotayut-i-kakie-preimushhestva-gazovyx-kotlov-navien-ace/
• https://oteple.com/nastennye-gazovye-kotly-navien-modelnyj-ryad-plyusy-i-minusy/
• https://santechbomba.ru/publications/luchshie-yuzhnokoreyskie-kotly-navien/
• https://expert-dacha.pro/otoplenie/kotly-ot/gazovye-k/proizvoditeli-gaz-k/gk-navien/ace.html
• https://peredpokupkoy.ru/otzyvy-navien-deluxe-24k-12502166/

Burner design features

Modern models of Navien gas boilers differ mainly in the structure of the burner. There are open and closed type devices. In the first case, a mandatory chimney is required , which works on the principle of natural draft.
In open-type equipment, oxygen for the burner is taken from the room where the gas wall-mounted boiler is located. In this case, good ventilation is required so that there is an uninterrupted flow of air from outside into the room. Models with a closed burner must have a coaxial chimney. Oxygen is supplied through it, and various combustion products are released . This type of system is activated by forced draft. This happens thanks to the ventilation hole, which is located between the pipes of the coaxial chimney. In reviews, many consumers write that it is better to route the chimney outside through the wall. In this case, the structures should be placed at the same height where the boiler is located. The distance from the floor should be at least 50 centimeters. This is much more economical when compared with a chimney, where natural draft is provided.

How to choose and what to pay attention to?

Basic parameters for choosing a gas boiler for residential, administrative and industrial premises:

• power - the efficiency of heating the room depends on it;
• type of installation - the brand’s line includes floor and wall models;
• burner type - devices with natural smoke removal of combustion products and are equipped with a closed combustion chamber;
• functionality - there is equipment with the ability to connect a boiler to provide hot water supply;
• additional elements - models are equipped with overheating sensors, screens displaying information about pressure and temperature, remote controls and a display displaying information about the operation of the device.

Other features of Navien boilers

All models of Navien double-circuit gas boilers have a number of advantages and disadvantages. To identify them and make a choice, it is worth understanding the model ranges of this brand. To do this, it is worth studying the characteristics of the models and, of course, reading reviews.

Navien gas heating equipment is available in three colors:

• gold,
• silver,
• white

The main advantages are aesthetics and compact size. These advantages are noted in many reviews. Of course, this allows boilers of this brand to fit into almost any interior .
In addition, a certain model range is ranked according to the power of all devices, which can range from 9 to 35 kW. Also, many consumers in their reviews indicated another advantage of gas boilers of this brand - a special system that prevents the coolant from freezing. The design includes a separate sensor for these purposes, which is responsible for starting the pumps precisely at the time when the room temperature drops to 10 degrees Celsius.

Specifications

The technical characteristics of almost all models (with the exception of the Atmo series) are similar and differ only in the power of the unit.

It corresponds to the heated area - 13 kW boilers are capable of serving 130 m2, 24 kW - 240 m2, etc.

For ease of consideration, the main parameters of Ace series boilers should be summarized in a table:

Main model range

There are three main model ranges of Navien gas boilers. Each of them has its own characteristics, disadvantages and advantages. To make your choice, just read the reviews of those who have already installed one or another model of heating equipment from this manufacturer.

ATMO

Such a gas boiler is equipped with a fairly convenient system that allows the vapors that form to be removed naturally. It is worth noting that the design of such equipment was created specifically for operation in fairly harsh conditions , where there are noticeable differences in gas pressure, as well as various fluctuations in the main gas pipeline.
The power of such heating equipment is 9 – 24 kW. This indicator depends on the specific model. This power is quite enough to heat the coolant in the heating system to 80 degrees, as well as hot water to 60 degrees above zero, taking into account the intensity of use: up to 10 liters per minute.

NSN

Many consumers in their reviews note this model range as the most modern achievement of the manufacturer Navien. The efficiency of this heating equipment is 110% .
Such indicators are achieved by using the temperature of the vapors that are emitted through the chimney. The heated moisture from the condensate collects in the heat exchanger. It also heats the water flows. It is worth noting that Navien boilers of this model range are equipped with a system that collects condensate containing a minimum of various harmful emissions. In addition, the equipment provides a system that allows you to regulate power. In turn, this implies the ability to control the heating of the coolant.

Ace Coaxial

Judging by the reviews, gas wall-mounted boilers of this model range have all the advantages of Navien equipment. Units of this type are quite easy to operate and differ from others in their significant efficiency and reliability.
To make it convenient to use such equipment, the manufacturer installed a wide liquid crystal screen on which technical information is displayed. In addition, navien heating equipment can be controlled remotely. The boilers of this model range are equipped with a special remote control, which has a built-in temperature sensor. In turn, this allows you to change the boiler settings automatically depending on the microclimate in the room where the remote control is located.

Description of the series

Stable frost protection system

When the room temperature drops, the boiler's anti-freeze system is automatically activated. If the heating water temperature drops below 10°C, the circulation pump automatically starts, ensuring constant circulation of the coolant in the heating system. When the heating water temperature drops below 6°C, the burner automatically turns on and warms up the coolant to 21°C.

Safe and stable operation of the boiler during frequent voltage fluctuations in the electrical network

When the mains voltage fluctuates +/-30% from 230 V, the SMPS (Switched-Mode Power Supply) protection chip on the microprocessor is triggered. At the same time, the boiler operates without failures or stops, thereby extending its service life and preventing breakdowns.

Possibility to use heating and hot water at low inlet gas pressure in the gas pipeline system

The boiler operates stably and safely at a gas pressure of 4 mbar (40 mm water column).

Ability to use hot water with low incoming water pressure in the water supply system

The boiler operates stably when the incoming water pressure drops to 0.1 bar, making it possible to use it in residential areas with low water pressure in the water supply system, as well as with frequent pressure changes in the water supply system.

Remote control panel INCLUDED WITH THE BOILER!!!

The Russified remote control panel allows you not only to save fuel and reduce heating costs, but also to constantly maintain a comfortable temperature, taking into account the characteristics of the room and set the optimal heating mode for domestic water. The remote control is equipped with a liquid crystal display with built-in backlight.

Modulated turbocharging system

The turbocharger fan installed in Navien Deluxe/Navien Deluxe Coaxial boilers under the combustion chamber measures the rotation speed based on a signal received from the APS (Air Pressure System) air pressure sensor. Thus, the combustion chamber of the boiler is supplied with air in an amount proportional to the amount of gas supplied. It was precisely this system of operation of the Navien Deluxe/Navien Deluxe Coaxial boilers, by installing a fan under the combustion chamber and using an APS sensor, that made it possible to ensure the most complete combustion of gas and minimize heat loss associated with smoke removal. The performance of Navien Deluxe/Navien Deluxe Coaxial boilers has increased without increasing the amount of gas consumed, and the efficiency of Navien Deluxe/Navien Deluxe Coaxial boilers with a stainless steel heat exchanger has become the same as that of boilers with a copper heat exchanger.

Stainless steel heat exchanger

Installation Features

Consumer reviews also show what features the installation of Navien boilers has. Installation of double-circuit wall-mounted models is a fairly simple and uncomplicated procedure, because the manufacturer includes instructions for such equipment . You can install the boiler yourself.

As reviews show, we should not forget that the installation of navien gas heating equipment requires a number of works carried out only by specialists who control gas consumption. Even with proper installation, the presence of gas company workers is mandatory. This is also necessary to conclude an agreement allowing the installation of a navien boiler, and to obtain permission to operate such equipment.