Gas boilers Navien: review, reviews, faults

Korean Navien gas boilers, like other equipment, are distinguished by good efficiency and the presence of many “tricks”: a remote control included, a functional menu and even external sensors for weather-dependent operation. All this for a fairly affordable amount. However, the manufacturer’s heating boilers are not without their drawbacks.

In the article we will look at the best models of Navien gas wall-mounted and floor-standing boilers, how they behave in practice, what advantages and, most importantly, disadvantages are noted by the owners, as well as what malfunctions may arise during the operation of boiler units in real conditions.

About company

Korea has long been famous for its high-quality electronics and household appliances, and heating equipment is no exception. NAVIEN is a giant enterprise specializing in the production of boilers running on gas and diesel fuel. The components are made in Korea and Japan. Assembly - only in Korean factories. Previously, the company supplied its products to the US and Pacific markets. Since 2007, promotion to European markets began. Today, Navien actively supplies its goods to Russia.

The most common problems

Often the causes of problems are low quality coolant or gas. Error codes help you solve problems. Here are the most common malfunctions that can occur with Korean gas equipment:

• Overheating.
• No flame signal.
• The fan is faulty.
• Damage to the control board.
• Short circuit in the flow sensor circuit.

Error codes

Despite the saturation of electronics, Korean heaters are functional, like any equipment, they can break down. Startup and operation do not always go smoothly - problems may occur during the process, and numbers appear on the display - error codes. The decoding of the codes can be read in the instruction manual. Common problems:

• Error "01". May occur due to a clogged system or pump malfunction.

• Error "02". The heating system flow sensor has tripped. There are several reasons:

— air has entered the system;

— the coolant filter at the inlet is clogged;

- there is a leak;

- sensor is broken.

With error “02”, hot water disappears. The water temperature rises sharply and then drops. It is likely that there is an air lock in the hot water system. It appears due to low pressure, poor operation of the circulation pump, or breakdown of the flow controller. In this case, you need to adjust the pressure and bleed air from the system.

• "03". The flame sensor worked - it “did not see” the fire. Causes:

— low gas pressure;

— the ignition electrodes are dirty;

— poor gas quality;

— the sensor is broken or there is a break in the electrical circuit conducting its signal.

• "10". Incorrect combustion products are removed. Causes:

— the turbine is broken;

— the pressure sensor is incorrectly connected;

— the chimney is clogged;

— excessive length of the pipe.

It happens that there are no problems with the chimney - perhaps the signal is caused by gusts of wind. Then the reason is in the chimney - it needs to be redone. To temporarily correct the situation, you can remove the air supply hose. But this is done only as a temporary measure.

Important! It is recommended that when installing boilers, the chimney should be located on the leeward side.

All Navien modifications are reliable, but the duration of their operation largely depends on how the installation was carried out, how the maintenance is carried out and whether the settings are set correctly.

Official website: where to view all models and operating instructions

A snapshot of the official Navien website in Russia.
In Russia, the official website of the manufacturer is located at: navien.ru/

By going to the “Equipment” section → “Wall-mounted boilers”/“Floor-standing boilers” → you can see all available models and their descriptions. Each model is accompanied by electronic copies of full instructions for use, installation, configuration, technical data sheets and certificates. The manuals for each model describe the characteristics, installation diagram, algorithm for switching on and adjusting the operation, maintenance features, and contain clear schematic images.

Differences between Navien and analogues

The Korean manufacturer is among the few that use their own designs. The brand does not produce modified or slightly improved versions - each new modification is worked out to the finest detail. Among the design advantages it is worth noting:

• Remote control via iOS and Android systems. This is for the SMART TOK series.
• Modulating burners. Quiet operation depends on them; they are responsible for maintaining a comfortable temperature for humans.
• Thanks to voice prompts, the operation and configuration of the devices is simplified. If the user is not well informed about how the device works, voice prompts and error codes will help him.
• Meets our conditions - possible decrease in pressure, voltage surges in electrical networks, pressure drops in gas pipes.
• Self-diagnosis. The device itself determines its “diseases” and notifies the user about them by displaying an error code on the display.

The Korean manufacturer, taking into account possible risks, created safe and easy-to-use equipment. If you take an interest in the statistics of reviews, it becomes clear that consumers have managed to evaluate the quality of heat exchangers and burners, as well as the uninterrupted operation of Korean heaters. Only 2% of buyers contact service centers, and even then, the problems are usually caused by incorrect connection or operating errors. To prevent the boiler from creating problems, you need to connect it correctly and configure it correctly. It is also important to know how to use gas equipment - for this purpose, instructions are attached to each piece of equipment. The kit also includes a passport and connection diagram.

Owner reviews of Navien gas boilers: advantages and disadvantages

Many features depend on the model, since it is impossible to generalize the entire model range. However, after analyzing the experience of installation and operation, and many reviews from owners, we have identified general advantages and disadvantages that apply to each model.

Advantages

The brand positions its heating equipment as optimal according to the price-quality formula. Navien boilers can be used for heating a private house, apartment, or industrial premises. Their advantages:

• Resistant to voltage surges. Its surges often lead to equipment failure. The Koreans have provided reliable protection - they have installed a Switched-Mode Power Supply control chip - it expands the voltage range to 165-300 V.
• Resistant to low gas pressure. Many modifications refuse to work because of this, but not Navien - they continue to work at the lowest values.
• Pleasant, ergonomic design.
• Any Navien boiler is double-circuit. This means that, in addition to heating, its owner receives an addition in the form of hot water supply.
• A wide range of powers is offered - you can choose an option for any room.
• Equipment owners can always get professional help at the service center. Contact details can be found in the attached documentation.

Pros and cons of Navien floor-standing boilers

By purchasing a navien floor-standing gas boiler, the consumer receives a small, lightweight device that will fit into any space and will not take up much space. The manufacturer took care of the ease of installation of its equipment and therefore provided for the location of inlet pipes for connecting pipelines on both the right and left sides. These units have many advantages :

1. A unique gas burner design that operates very quietly.
2. Convenient electronics that allow you to set the appropriate mode.
3. Stable operation of the boiler is ensured even with low water pressure in the pipeline.
4. The presence of a second circuit will produce warm water.
5. Remote control with backlight.
6. Beautiful stylish design.

The downside of Navien gas boilers is their dependence on electricity.

Are there any disadvantages?

• The cost is higher compared to Russian analogues.
• In the event of a breakdown, you have to look for imported components.
• Need regular maintenance.

But these shortcomings can be disputed. By paying more, you get a reliable device, forgetting about unstable operation and other shortcomings inherent in many domestic boilers. The issue with spare parts is also resolved simply - they can be ordered from authorized ones. And finally, regular maintenance - without it, no equipment will last long.

How to turn it on?

You can turn on the device in two ways:

• Remote control.
• Using the buttons on the control panel - you just need to press "Power".

After startup, the device begins to operate in the specified mode - which was previously set. To change the settings, you need to use the manual and set the modes correctly. Before starting the device, it is installed, connected to utility networks, and the heating system is filled with coolant - keeping an eye on the pressure gauge.

Features of the functionality of Navien brand boilers

It is not without reason that boilers made in South Korea with the Navien logo are leaders in ratings compiled based on the opinions of service technicians. They work flawlessly, comply with Russian standards, and have an impressive list of qualities that ensure comfortable operation.

The benefits that owners of gas heating units can take advantage of include:

• Frost protection. A stable operating system that eliminates the formation of ice plugs in pipes and the unit. When the ambient temperature drops below +10º, the circulation pump is automatically activated; when it drops from +6º, the burner starts.
• Protection against power surges. The safety and continuous operation of the unit is ensured by a device that eliminates failures and stops. The SMPS chip (an abbreviation for Switchet Mode Power Supply) built into the microprocessor is triggered by fluctuations in the power supply.
• Protection against low pressure in the gas pipeline. The units can withstand pressure drops in blue fuel supply systems without disruption. They do not stop working even if the pressure is only 4 mbar.
• Use when water pressure drops. Boilers from the South Korean manufacturer work efficiently if the cold water pressure at the inlet to the units drops to 0.1 bar.
• Unique heating technology. The equipment is supplied with a remote control panel equipped with a temperature sensor. The readings it takes are instantly transmitted to the boiler, which turns on and off in accordance with changes in the temperature background within the object being processed.

In addition, Navien brand boilers are equipped with well-functioning automation and a wide range of safety systems that interrupt the heating of coolant and sanitary water in the event of a threatening situation brewing or arising.

Model overview

Many users initially gave negative reviews about Korean boilers. Reasons: leaks in connections. They had to be eliminated by replacing the gaskets - you need to buy a rather expensive kit. The second flaw was associated with the belated start of the burner - the coolant had time to cool down more than necessary. But the company corrected the shortcomings; today there are practically no such accusations against Navien. The brand produces three types of mounted heaters:

• atmospheric;
• condensation;
• turbocharged.

The consumer can purchase a gas boiler:

• Single-circuit or double-circuit.
• Wall or floor. The latter are more bulky and require a separate room.
• With open or closed combustion chamber.

The widest range is in the line of mounted models. It is these devices that are in the highest demand among Russian consumers.

Navien Atmo 24AN and others

The atmospheric wall-mounted device Navien Atmo replaced the less successful modification of Ace. It can operate at extremely low fuel pressure - 8 mBar, and water - 0.6 Bar. There are 4 models of different power in the series - 13, 16, 20, 24 kW. The heat exchanger for heating is made of copper. For DHW – made of stainless steel. Automatic control. There is a remote control. There is frost protection. Specifications:

• 24 kW.
• Heating of water in the heating system is 80 °C.
• Circuit pressure (maximum) – 3 Bar.
• Efficiency – 86%.
• The maximum water temperature in the hot water supply is 60 °C.
• Weight – 27 kg.
• Estimated cost 26-27,000 rubles.
• Heating area – 240 m².

Important! The system can only be filled with water - antifreeze is prohibited.

Deluxe 24K and other turbocharged versions

The line of turbocharged modifications is represented by three series: Deluxe (13-40 kW), Prime and Smart TOK (13-35 kW). “Navien Ice Turbo” is an outdated model; it was replaced by Deluxe and Prime devices. Pressurized heaters have a closed firebox, and air is forced into it by a fan. The fan performance is regulated by the controller. To allow air to enter the chamber, a coaxial chimney is installed. Due to forced injection, turbocharged modifications are characterized by increased efficiency.

There are no further differences between the turbocharged and naturally aspirated versions. The equipment is completely similar - expansion tank, pump, additional heat exchanger.

The Prime series, like the Deluxe Coaxial, has a closed firebox and all the usual elements of a turbocharged model. But Prime has an additional module - weather-dependent automation. Characteristics of the 2-circuit wall-mounted boiler Deluxe 24K:

• Efficiency – 90.5%.
• 24kW.

auto ignition

• Maximum heating area 20 m².
• Natural gas consumption - 2.58 m3/h.
• Dimensions (WxHxD) – 440x695x265 mm.
• Weight – 28 kg.

NCN 40KN and other condensing models

The operating principle of a condensing heater is based on the use of both direct and latent heat released during gas combustion. This allows you to achieve high efficiency values ​​- more than 100%. Condensing heaters are represented by Navien NCN and NCB models. Their heat exchangers are made of stainless steel. The equipment is similar to the turbocharged versions. The difference is that the controller’s functions are expanded. For example, he can program work for the next seven days. NCN is represented by 4 boilers 21-40 kW, NCB is also represented by 4 models 24-40 kW. Air is supplied forcedly through a coaxial or separate chimney. For example, the characteristics of NCN 40KN:

• 40.5 kW.
• Two circuits. Wall installation.
• Closed firebox.
• Auto-ignition.
• Weighs 38 kg.
• Efficiency 107.4%.
• The maximum heating of water in the DHW is 65 °C.

LST 30 KG and other floor models

The brand presents a line of floor-standing boilers of four series - LST, LFA, GA, GST with a capacity of 13-60, 13-40, 11-35 and 35-60 kW, respectively. Each of the presented samples is a universal floor-standing unit that can operate on both natural gas and diesel fuel. Floor-standing versions, no less than wall-mounted ones, are full of automation. For example, the characteristics of LST 30 KG:

• 90% efficiency.
• Weight – 45 kg.
• 30 kW.
• Heated area – 300 m².
• Auto-ignition.
• Volatile.

Features of operation of Navien boilers

Navien - domestic double-circuit boilers with an open or closed combustion device are used for heating residential and public premises and heating water for domestic and technical purposes.

The boiler control is Russified and adapted to the real operating modes of Russian engineering systems.

The APS mechanism ensures a stable fuel combustion process with minimal consumption. The blower fan for supplying air and creating a working pressure of the gas-air mixture has different speed operating modes and allows the operator to control the rotation speed for complete combustion, preventing condensation.

Navien boiler equipment:

• Circulation pump;
• universal heat exchangers for the heating circuit and DHW system;
• security automation;
• expansion tank;
• selection of heating mode and timer to stop the unit;
• Navien boiler, installation and operating instructions.

The advantage of using a heating unit is that a burner with pre-mixing of the gas-air mixture has a modulation range of 30-100%.

How does Navien Ace TURBO work?

For example, consider the description of the operation of a turbocharged heater. Such a device is not afraid of low fuel pressure or power surges. It will heat any area. At the same time, it heats the water - there is a second circuit. DHW heat exchanger – steel. It is much cheaper than copper analogues. The lack of power - due to the insufficient thermal conductivity of steel - can be compensated for by turbocharging the burner. Such devices easily compete with analogues that have copper heat exchangers.

The turbo heater monitors the temperature of the coolant - if it drops below plus 10 degrees, the circulation pump turns on. It drives water, preventing ice crystals from forming. When the temperature drops below plus 6 degrees, the burner will light up and heat the coolant to +21 degrees.

Turbocharged devices are available in two modifications, the second - with a coaxial chimney “Navien Ice Turbo Coaxial”. It is advantageous to install it in rooms where it is impossible to ensure a normal supply of oxygen. A coaxial chimney takes air from the street.

Specifications

NAVIEN Ace-16K Turbo

Gas wall-mounted 16 kW is a compact design of a gas boiler for autonomous heating and hot water supply in houses with an area of ​​up to 98 m2 with a remote control unit. Net power is 16 kW, average efficiency is 86%, and the highest fuel consumption is up to 1.33 m3/hour. DHW capacity - up to 5.5 l/min at t=35C.