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:
- Each model is energetically justified. In reviews, many consumers write that gas is an efficient and cheap energy source.
- 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.
- 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.
- In the production of Navien gas boilers, only modern technologies are used, which ensure sufficiently long service life without service checks.
Frequent errors and malfunctions of Navien Ace
Gas heating appliances from Navien are equipped with an electronic control system, which is also famous for its reliability. All malfunctions in the operation of the heating device are displayed on the liquid crystal display in the form of a digital code. Each code corresponds to a malfunction of one or another element of the heating unit, or a deviation of any operating parameters. There are a total of 13 digital error codes.
Error E01
This error can occur in a Navien Ace gas boiler if the boiler for some reason experiences overheating. In most cases, this occurs due to the failure of the centrifugal pump, which circulates the coolant in the heating circuit. The pump may not rotate if:
- the rotor is jammed (soured);
- the electronics that control the pump have failed;
- The stator windings burned out.
The last reason for pump failure entails the replacement of this boiler element. Also check the installation of the check valve. Perhaps it was placed on the wrong side.
Error E02
This error most often appears due to low pressure in the heating circuit. The pressure may drop due to a leak. If a leak is not detected, then it is enough to refill the system with water, and this error will be eliminated. In some cases, this error may also be associated with incorrect operation of the circulation pump. To make sure that the pump is working correctly, you need to unscrew the plug on the back of the pump with a curly screwdriver and visually determine whether the shaft is rotating or not.
Also, error E02 k can occur when for some reason the heating circuit taps are closed, or when there is air in the heating system. Air is removed from the system using special valves.
This deviation in the operation of the Navien Ace gas boiler can also occur due to improper functioning of the flow sensor. The operation of this sensor is checked using a multimeter. If error E02 occurs, it is also worth checking the dirt trap, which is traditionally installed in front of the boiler.
Error E03
This error indicates that for some reason there is no flame in the burner of the Navien Ace boiler. This malfunction may occur due to a shutdown or extremely low gas pressure. You also need to visually verify that there really is no flame on the surface of the burner. Gas may not be supplied even if the gas valve fails.
There may also be no flame due to the fact that the ignition does not work - there is no spark. The absence of a spark can be determined by ear, since clicks at the moment of spark formation are clearly audible. The spark is controlled by the ignition transformer, and it may have failed. Also, the lack of a spark can be caused by damage to the insulation of the electrode, which is used to ignite the gas. The presence of a spark from the electrode is determined visually.
The absence of a flame can also be caused by insufficient grounding of the heating device. This problem can be easily eliminated using a large gauge wire or a copper busbar.
Error E04
This error may appear when the flame sensor is not working correctly. False operation of this sensor can be caused by an incorrectly configured electrode, the spark from which hits this sensor. This error may also appear if the pressure in the gas line is too high.
Error E05
A problem with this code means that the coolant temperature sensor has failed. It also happens that the sensor itself is working, but its connection with the control board is broken. This may be caused by condensation or water entering the sensor connectors, which can cause oxidation and loss of contact.
Error E06
This error is also associated with incorrect operation of the water temperature sensor in the heating circuit. But this is not due to the loss of contact with the sensor or its history, but to a short circuit in the temperature sensor itself. If a short circuit occurs, then the boiler electronics perceives this event as extreme heating, due to which the protection is triggered and this error appears. The performance of the temperature sensor is determined using a multimeter. The resistance of this sensor at room temperature should not exceed 10.3 kOhm.
Error E07
This error is also associated with the Navien Ace boiler temperature sensor, but not in the heating circuit, but in the hot water supply circuit. The malfunctions of this sensor are similar to those described in the previous section. The resistance parameters that need to be taken into account when checking the DHW temperature sensor are also the same.
Error E08
This fault indicates a short circuit in the hot water sensor. If this error is present, the temperature sensor is checked using a multimeter.
Error E09
This error appears in the Navien Ace gas boiler when the turbine is not working correctly. This may be caused by oxidation on the turbine connectors, which entails a loss of voltage, or its complete absence. The turbine itself can also fail - it can rotate slowly or even jam.
Error E10
A malfunction with such a code indicates that the removal of combustion products is difficult or impossible. This may be caused by the formation of ice on the chimney, which prevents the removal of combustion products.
Error E13
This error occurs when the flow sensor is not working correctly. This is mainly observed when this sensor is short-circuited.
Error E15
A malfunction with such a code is observed when the current voltage or its frequency differs greatly from the maximum permissible values. This error can also appear if there is no grounding.
Error E16
This error indicates overheating of the heating device. This may be caused by insufficient coolant circulation.
Error E027
This code indicates that the APS sensor is not working correctly or has failed.
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.
Which boiler model is ultimately better to choose?
In our opinion, the most optimal among wall-mounted ones is the atmospheric model Ace (ATMO). It has a fairly simple design, making it more reliable, while its cost is as affordable as possible. Already in the basic package there is a room thermostat. It is only important to connect the boiler through a voltage stabilizer and use high-quality coolant. More technologically advanced and expensive models often raise many questions regarding reliability.
An even better option, if boiler room conditions allow, would be to choose a floor-standing GA; this is one of the best Navien gas boilers for heating a private home. It is quite economical, functional and reliable, and costs only slightly more than the Ace.
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:
- Cases.
- Heat exchanger.
- Burners.
- 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.
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.
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.
What's special about ACE 24k Coaxial
The boiler of this series is a 2-circuit wall-mounted unit that can be easily installed in absolutely any room, be it an apartment, a residential building, a country cottage or an administrative facility. The device has a closed combustion chamber, due to which there is no need to equip a separate boiler room for its installation. You can install NAVIEN Coaxial even in a plumbing unit.
The equipment is well adapted to work in far from simple Russian conditions. It is quite capable of functioning fully at sub-zero temperatures outside the window. Moreover, it is not afraid of low quality coolant and insufficiently stable gas supply. This also applies to voltage drops. And, taking into account the fact that every second family in Russia faces such problems, we can summarize that NAVIEN ACE 24k is suitable for domestic buyers in all respects.
Many manufacturers claim that their unit has the optimal price-quality ratio. However, it is the NAVIEN ACE 24k Turbo model that excels in this parameter better than anyone else. Its cost is truly affordable, and its performance characteristics are surprising. The equipment consumes very little fuel during operation, which will have a positive effect on the family budget, especially in the cold season. And if the slightest malfunction is detected, it can be repaired for relatively little money in one of the service centers.
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.
Characteristics of Navien Ace
Atmospheric gas boilers of this brand can operate on both liquefied and natural gas. Navien Ace Atmo have an efficiency of about 90%, and their thermal power is about 24 kW. These boilers can heat a room of 240 square meters, and the temperature of the coolant inside the heating circuit can be maintained at 80 degrees. For the DHW circuit, the maximum temperature is 60 degrees. Navien Ace gas units can operate at extremely low natural gas pressures, down to 8 mbar.
Navien Ace turbocharged boilers have an efficiency of 92% and a thermal power of up to 40 kW. In maximum mode, such a boiler consumes 4.39 cubic meters of natural gas per hour. This performance allows the Navien Ace turbocharged boiler to heat a room of 400 square meters.
This company has also launched the production of highly efficient condensing boilers, which are famous for their highest efficiency and fantastic cost-effectiveness. Condensing units also operate on the principle of forced removal of combustion products from the chamber.
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.
