Navien boilers: variations, connection and operation tips

The huge variety of gas boilers is now sometimes becoming a problem when choosing the right option. Even from one manufacturer, the number of devices can be simply huge. In order to simplify the selection somewhat, boilers from reputable manufacturers can be considered exclusively. For example, it is better to take a closer look at gas boilers from a manufacturer from Korea.

The Navien boiler is produced by a Korean company of the same name based on its personal inventions. The result is equipment that is characterized by increased efficiency, efficiency and fairly simple operation. Thus, it turns out that with the help of this technology it is possible to organize an excellent individual heating.

Today on the market from the company Navien, you can find wall heaters, which differ by the force (natural or forced). Such double-circuit units can heat a dwelling with an area of ​​20-500 square meters.

The operation of these devices is carried out in a quite usual pattern. The absorption of heat, which is produced when the gas burns, heats the heat exchanger of the boiler. The pump, which is built into the system itself, allows water to circulate from the heat exchanger. Air is forced into the combustion chamber using an integrated ventilation system.

In order to increase the service life of heating devices, the manufacturer manufactures them from stainless steel, so they are well protected from rust and can withstand high temperatures and temperature drops for a long time.

Gas boilers typically consist of:

• housing boxes;
• circulation pump;
• burners;
• one or two heat exchangers.

In models from Navien the burner may have a different structure. For example, in open-view units there must necessarily be a chimney that will provide traction. Air for the burner will be taken immediately from the place where the boiler is located. This means that this model will require a constant supply of oxygen to the room.

For closed burners used chimney, which is called a coaxial. Oxygen supply takes place through it and products resulting from combustion are released. Such a device works with forced pitch. The opening for ventilation in this case will be brought out through the wall.

Heat exchangers on dual-circuit heating devices are separate. One of them provides space heating, and the other heats cold water for use. It is worth noting that for the manufacture of both heat exchangers Koreans use only stainless steel. This allows you to significantly extend their service life, while in most boilers from other manufacturers only one of the heat exchangers is not susceptible to corrosion.

It is necessary to note such an important point as the fact that the company independently manufactures all the elements that make up the boiler.

A built-in integrated circuit in the electronic board of the boiler provides protection against voltage surges. Such protection is available only in expensive gas equipment from the German manufacturer. However, you should not rely only on the chip, it is better to use the voltage stabilizer additionally.

The most important feature of the boilers Navien can be considered the control unit in the form of a small box, which is brought out. It has a display and buttons that allow you to control the operation of the device. For example, the display shows data on faults or errors in the work, the temperature of water, air and coolant. Also on it you can set the time. The buttons allow you to independently set the boiler operation mode, temperature and turn the equipment on or off.

The power of the gas unit is quite an important parameter, because performance depends on it. The greater the power, the more water per minute can heat the boiler.For example, if the capacity of the unit is 13 kW, then per minute it will produce about 10.5 liters of heated water, and if 35 kW it is about 19 liters. Practice has shown that a 16 kW device capable of producing 14 l / m is sufficient for an average family.

Navien device management is also very convenient due to the presence of voice guidance systems, which can always give a hint. Self-diagnostics of equipment is also good, as it gives an opportunity in the shortest possible time to obtain the necessary data on malfunctions, malfunctions or any errors.

With all this heating equipment is durable, durable, compact and inexpensive. In terms of price-quality ratio, it is better than many German and Italian counterparts.

The featured heating boilers are divided into several types.

For example, by the number of circuits (heat exchangers) are:

• single-circuit, which allow only heat the room;
• dual circuit, which can both heat and heat water at the same time.

According to the method of mounting boilers are of two types:

• Floor. Located on the floor and is notable for its considerable size.Most often it is installed in a separate room. Denoted by Navien with the letter "N".
• Wall. Due to its compact size, as the name implies, it can be mounted on the wall. To install it is not necessary to allocate a separate room.

Hinged and outdoor versions of devices have a three-way valve that regulates the temperature of the coolant. It should be borne in mind that wall units are most interested in buyers, and they are represented by a large number of models.

By the very principle of operation, a heating unit can be of three types:

• Turbocharged. The combustion chamber is closed. It is divided by the way air enters and the products of combustion exit:

  • With coaxial chimney. The designation of such boilers from Navien is “E”, for example, the Ace 24E model. And the last letter means "euro", that is, this type of chimney is popular in Europe. By itself, such a chimney actually represents two pipes in one. The outer tube provides access to oxygen for the device, and the inner tube is necessary for the removal of products formed during combustion.

  • With a split chimney. Such boilers are denoted by the letter “K”, which means Korean type of chimney. Such boilers have two nozzles, to which is connected a pipe for supplying air and a pipe for removing combustion products. This type of boiler is perfect where you can not install a device with a coaxial chimney.

• Atmospheric. This type of device has an open type of combustion chamber. In it, the products of combustion are removed using the most common traction, as in wood-burning stoves. For such units requires a chimney in the form of, for example, a brick pipe. Such coppers are designated by letters "ATMO". Coppers of this look are suitable to work at strong pressure drops of gas. Power up to 25 kW is enough to heat the coolant to +75 degrees, and water - to +55 degrees.

• Condensation. This model line is designated by Navien as “NCN” and is the latest innovation of the company. Such boilers can produce an efficiency of 108 percent. This figure was achieved due to the fact that the temperature of the vapor that goes through the chimney is used. The principle of operation of such a boiler is reduced to the fact that the heated condensate accumulates in the heat exchanger, heating the incoming water.In addition, such boilers have a system that collects condensate with a minimum of harmful emissions. This invention saves fuel by 30 percent and reduces the amount of harmful emissions to 70 percent.

Also, the boiler may be different in what kind of fuel is used - gas or diesel.

Among the boilers Navien, which have rather similar technical characteristics, the following series are in special demand:

• "Smart Tok" (from 13 to 35 kW) It is conveniently controlled using a smartphone. Even at a distance it will be possible to control the operation of the boiler. Remote control and voice prompts also help in managing. Gas consumption can be reduced by controlling power in several modes. At the same time, models of this series work stably, even if the gas pressure at the inlet is low or there are voltage drops.
• "Prime" (from 13 to 35 kW) It works stably when the voltage in the network is low and the gas pressure is low. Coppers of a series are supplied with system which protects from freezing. Heat the water even at low pressures in cold-water. Availability of weather-proof automation and turbocharger system with modulation.

• "Deluxe" (from 10 to 40 kW) It shows excellent performance with a slight pressure of gas, water and frequent changes in voltage in the network. Included equipment is an external control panel. Heat exchanger resistant to corrosion.
• "Deluxe Plus" (from 13 to 40 kW) It differs from the Deluxe series in the form of two stainless steel heat exchangers. Also on the front panel of the device has a built-in control panel.
• "Atmo" (from 13 to 24 kW) shows stable operation even with unstable gas pressure, water and voltage. In this model of this series are equipped with a remote control, which is included in the kit of the boiler. Among the differences in the data of the boilers, it is also worth noting the high heating rate and the possibility of power modulation.

The boilers of the Korean company with floor installation are represented by several series operating on gas and diesel:

• “GA” (from 17 to 35 kW). Despite the fact that the models of this series are floor-standing, they are small in size and convenient to transport and install. The boilers have a universal smoke removal system and a secondary heat exchanger with high efficiency.
• "GST" (from 35 to 60 kW). In addition to the usual advantages of floor-standing gas boilers, the series models are also equipped with a basic stainless steel heat exchanger.

• "LST" (from 13 to 60 kW). The boilers of the series work on diesel and are characterized by a rational design, European stylish design, a universal smoke removal system, and an improved burner. In addition, its models are equipped with filters for fuel with replaceable cartridges. In models with the designation "KG" and "KRN" there is a pre-heating of the fuel.
• "LFA" (from 13 to 40 kW) - This is a series of boilers that save fuel and give a stable efficiency of 91 percent. Models of this series can be used for floor heating. The devices have a very robust design, are equipped with pipes with two-way connection. At the same time, they work absolutely silently and without vibration; they are easy to install, use, and periodically maintain.

Condensation boilers of the NCN series from Navien differ in power - 21, 25, 32, 40 kW. Can give efficiency of 108 percent.

For a private house gas boilers from the manufacturer Navien fit just perfect. First of all, this is proved by the reviews of the owners of the equipment of this company, which contain a lot of positive things.

The advantages of boilers are represented by the following points:

• Gas boilers are cost effective as gas is an inexpensive and highly efficient fuel.
• The ecological purity of mounted boilers is obvious - carbon dioxide enters the air, which is absorbed by plants.
• Full automation of gas equipment allows you to set a program by which the boiler can work for a long time.

• Navien boilers can operate for quite a long time even if no service checks have been carried out.
• Simplicity of management is one more advantage of the Korean heating units. This also includes the ability to control some models of boilers at a distance, for example, from a smartphone.
• Decent quality at an affordable price is rarely found among devices from foreign manufacturers.

• A large number of models of boilers and a variety of colors.
• Inexpensive spare parts for a boiler make it possible to repair an old one in case of a breakdown and not immediately buy a new one.
• Compact dimensions make it possible to place boilers in any places, and not only where they fit.

• After the temperature is set, it quickly becomes warm.This option is especially relevant when you return home after a long trip and you want comfort as quickly as possible.
• Keeps hot water at the same level.
• Strapping, pump, tank and much more immediately available in the heating unit.
• Self-diagnosis on time notifies of errors or malfunctions in the system.

Korean equipment has few disadvantages:

• boilers cannot work without electricity;
• not quite quiet at work (but better than boilers from other manufacturers);
• in case of failure, only Korean spare parts will do;
• not always enough water temperature for two taps;
• need additional protection for electronics, especially often burns in thunderstorms;
• the inability to repair yourself.

The scheme by which Navien boilers are connected is very simple. During installation, all pipes must be connected to mounted mixers, after which they must be connected to the heating system.

Each boiler comes with a control panel and detailed instructions that allow you to install a two-circuit unit quickly and easily. Thus, you can easily install the unit yourself.Of course, if you wish, you can use the help of a special company.

However, it should be remembered that when installing gas equipment, you will still have to deal with gas workers. For example, a prerequisite is the conclusion of a gas boiler service contract, as well as obtaining permission from the gas service for its operation. If this is not done on time, then you can get a large fine and even the imposition of a ban on the use of the boiler.

All mounted heating devices on the lower part of the body have five unions to which water and gas are connected. The order of connection is carried out in the following way: first the gas is connected, then the inlet and outlet of the water are located, and even further, the inlet and outlet of the coolant. It should not be forgotten that for every pipe that fits, it is necessary to pick up a ball valve.

Wall and boiler should be separated by a protective screen. He is a sheet of stainless steel 100x60 centimeters. This must be done for the purpose of fire safety. The heating device comes with a mounting plate that also allows you to install it correctly.

To set up the boiler, you can use the control panel, with the help of which it is convenient to switch and set temperature values, as well as other parameters.It is worth remembering that an important parameter is the optimal power of the burner, that is, the size of the flame. The electronics, which takes into account the ignition time, the temperature value, the rate of temperature change in the heating circuit, the temperature difference in the forward and reverse pipes, are responsible for this.

Korean boilers Navien, according to experts, fail quite rarely. And they notice that most of the faults are easily eliminated by users. In part, this is achieved due to the fact that the boilers of this manufacturer are capable of issuing an error code, which makes it easy to determine what went wrong. Often there are problems if the boiler is not properly shut off for the summer. And sometimes it’s enough just to turn the device off and on so that it works correctly.

The most common types of faults are:

• the device overheats and turns off;
• flame signal disappears;
• in the temperature sensor an open circuit occurs;
• fan malfunction;
• a short circuit occurs in the duct sensor;
• the system does not work correctly;
• control board faulty.

Navien boilers have basic error codes that are easy to troubleshoot. Of course, in order not to lose the warranty on the device, it is best to contact the service center in case of malfunctions. Quite often the number “01” is displayed on the display, which indicates that the pressure has decreased or a blockage has occurred. Also, this error may indicate that the circulation pump is faulty.

To eliminate this error, you should start by checking the filter that is in the heating system. It should not be air traffic jams. If they are, then the procedure should be done. It can be carried out on the radiators themselves. The next point is to check the health of the circulating pump. Also important is the resistance of the coil. The impeller, which is located in the pump, must fully work and be without damage. Moreover, everything that concerns the pump is better to be entrusted to a specialist, and not to risk, since the gas equipment does not tolerate amateurishness.

Another common mistake is a combination of numbers "02". It may indicate a failure of the pump impeller, air traffic jams in the heating system, a decrease in water pressure.When this error appears, the hot tap water may first flow warm and then cold again. This happens if the flow pressure is not enough for the burner.

Also, the maximum temperature value can be displayed on the remote control, but the water from the tap will flow cold at the same time. And it may not affect the heating. In this case, there may be a problem with insufficient water flow or air traffic jams.

Sometimes it happens that with this code the pump works, but at low speeds. This may indicate that the impeller received mechanical damage. In addition, the flow sensor may not work yet and the distribution valve is in the closed position.

To eliminate the error, first bleed the air and adjust the pressure. After that, it is worthwhile to analyze the resistance of the coil, and also check the impeller for damage. It will also be useful to check the normal operation of the flow sensor. In the event that it works incorrectly, then it should be disassembled and cleaned the box.

For more information about the causes and method of eliminating the error with the code "02", see the following video.

The code “10” is displayed if the fan is not working. For example, it may be bent or the problem arises due to improper connection of the tubes from the air pressure sensor. These tubes should be connected to the fan cochlea. Also, this error can be displayed when the chimney is clogged or even just with strong gusts of wind.

Ways to solve the problem often come down to replacing the fan. Sometimes you just need to clean the chimney. You also need to check the correct connection of the tubes to the fan snails. In the latter case, if everything is done as it should, there must be a bend.

It happens that the boiler is often switched on with noise, and the error is not displayed on the display. In this case, the pressure in the heating circuit reaches 1.5 atmospheres. To correct the problem, you can install a higher quality coolant, which will allow the heat exchanger to be longer serviceable. At a minimum, with such a problem, the heat exchanger should be removed and cleaned. However, it must be borne in mind that after 5 years of using the boiler, it is impossible to clean the heat exchanger.

The code "011" appears in the case if the coolant is filled with poor quality water.Most often, this error occurs at the boilers "Navien Ace".