Review of Navien gas boilers and customer reviews

The South Korean corporation Kyung Dong Navien Co has been present on the Russian market for a long time. Its main products are gas boilers under the same name. The company has long and firmly held its niche, because the Navien gas boiler is adapted to Russian operating conditions, it has a reasonable price, plus good technical characteristics. What the corporation offers today:

• Heating units for wall and floor design.
• Single-circuit and double-circuit models.
• With open and closed combustion chambers.
• Quite a wide selection of power positions.

If we consider Navien gas boilers in terms of the right choice, then it is necessary to divide them based on power, and accordingly, according to the size of the heated building. And the lower the performance of the gas unit, the smaller the area it heats. Hence the main division into wall and floor structures.

Model Navien Ace

Wall chaser discs for concrete: types, sizes, application

Discs for wall chasers must be selected taking into account the dimensions of the tool itself and depending on the required depth of the groove.
The main indicators of the size of circles are the diameter and size of the mounting hole. Discs for wall chasers are selected taking into account the size of the tool itself

There are several dimensional options for disks for wall chasers:

• small diameter – 115-300 mm;
• medium – 350-700 mm;
• large – 800-1600 mm.

The mounting holes are generally 22.2 mm in size, less often 25.4 mm. The indicators must correspond to the size of the hairpin on which the circles are put on.

The discs are made of durable steel, with diamond teeth applied to the outer edge by laser welding.

Segmented disks for wall chasers have a diamond addition in the form of sectors, between which there are grooves for cooling and removal of debris

The industry produces four types of disks:

1. Segmental. Diamond addition in the form of sectors, between them there are grooves for cooling and removal of debris.
2. Solid. The edge of the disk is not divided into segments, but holes are used for cooling.
3. For reinforced concrete. The diamond edge is sectored, the discs are significantly thick.
4. Turbo segment. They have a wavy surface, due to which cooling occurs.

The most popular disc sizes for concrete wall chasers are 125, 180, 230 mm. Wheels of 115 mm are used somewhat less frequently, and disks of 300 mm or more are intended for machine cutting.

Types of gas boilers and their technical characteristics

Navien boilers with a power of 13 kW have a fairly large range of models:

Navien Deluxe

The Deluxe series replaces the Navien Ace model range, the production of which has been discontinued. The design of the Deluxe series differs little from the design of older models, but some improvements have been made, weak components have been strengthened, and the overall life of the boiler has been increased.

Specifications:

Navien Deluxe Plus

One of the variants of the Deluxe series, characterized by a slight change in the amount of gas consumed. In addition, it has a coaxial chimney, which is easy to install and does not require the creation of unnecessary passages through the ceilings and roof.

Characteristics:

Navien Deluxe S

New among the Deluxe series boilers. It has improved components, some defects in connections and parts have been eliminated. It has a slightly reduced size.

Boiler parameters:

Navien Ace Atmo

The boiler is equipped with an open combustion chamber. This somewhat changes the overall design of the unit and requires use in a well-ventilated area. It can only operate on natural gas. For a greater thermal effect, the design uses a copper heat exchanger, which provides a better mode of thermal energy transfer.

Boiler characteristics:

Navien Prime

In addition to the standard set of options, this boiler is equipped with weather-dependent automation that independently regulates the heating mode in accordance with changes in outside temperature. This relieves the owner of the worry of changing the boiler settings and increases comfort for the residents of the house.

Navien Smart TOK

This unit is the most advanced model. With the same technical characteristics, it has a weather-dependent heating mode and can be controlled from a smartphone, for which a WiFi module is built into it.

Boiler parameters:

Where is it used?

Gas double-circuit boilers Navien Ace series are designed for organizing heating and hot water supply of residential premises or offices of the appropriate area.

This limits the scope of use of these units, although they can be installed in any premises. The main task is to ensure that the serviced area matches the capabilities of the equipment and the availability of all the necessary resources - gas, electricity and water (coolant).

NOTE! In addition to the area, it is necessary to take into account the volume of the room, which may be too large for this Navien boiler model. The product passport indicates the maximum volume possible for the normal functioning of the system.

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.

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%.

Brief operating instructions: control and adjustment

All actions with the boiler are carried out using a remote control panel. The water temperature in the heating system is adjusted by pressing the “+” or “-” buttons on the remote control when the “heating” mode is selected, which is indicated by a stylized image of a battery. The display shows the numerical value of the set temperature. It is also possible to set the mode according to the air temperature in the rooms, for which you need to turn on the corresponding symbol on the display (symbol of a house with a thermometer inside). The flashing image shows the desired temperature value, and the constant image shows the actual temperature. Hot water is adjusted in a similar way, you just need to switch the mode.

Common errors and causes of problems

Sometimes the boiler displays a special code on the display, indicating an error in the operation of a system. Let's look at typical errors and codes:

This table shows common errors in Navien boilers

To solve problems that arise, you should eliminate the source of the malfunction yourself or contact a specialist. There are some special requirements that are indicated in the instructions. For example, code 10 - an error in the smoke removal system - can occur when the system is working properly, but there is simply a strong wind outside. In order to avoid errors, you should carefully study the user instructions.

Navien gas boilers are practical and easy-to-use devices, beneficial from an economic point of view, with full functionality and capabilities. At relatively low prices, South Korean equipment is optimally suited for the harsh Russian conditions, allows you to create a comfortable temperature in the house and organize the supply of hot water. Installation, operation, and maintenance of Navien boilers does not cause any difficulties; all actions are described in detail in the attached instructions. Detected malfunctions or problems that arise are promptly eliminated by specialists from service centers.

Advantages and disadvantages

For a private home, gas boilers from the manufacturer Navien are simply ideal. First of all, this is proven by reviews from owners of equipment from this company, which contain a lot of positive things.

The advantages of boilers are presented by the following points:

• Gas boilers are cost-effective because gas is an inexpensive and very efficient fuel.
• The environmental friendliness 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 according to which the boiler can operate for a long time.

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

• A large number of boiler models and a variety of colors.
• Inexpensive spare parts for the boiler allow you to repair the old one if it breaks down, rather than immediately buying a new one.
• Compact dimensions make it possible to place boilers in any place, and not just where they fit.

• Once the temperature is set, it quickly becomes warm. This option is especially relevant when you return home after a long trip and want comfort as quickly as possible.
• Maintains hot water temperature at the same level.
• The piping, pump, tank and much more are immediately available in the heating unit itself.
• Self-diagnosis promptly notifies you of errors or failures in the system.

Korean equipment has quite a few disadvantages:

• boilers cannot operate without electricity;
• not entirely quiet during operation (but better compared to boilers from other manufacturers);
• in case of breakdown, only Korean spare parts will be suitable;
• There is not always enough water temperature for two taps;
• additional protection for electronics is needed; it burns especially often during thunderstorms;
• impossibility of repairing it yourself.

Introducing ACE models from NAVIEN

NAVIEN ACE 24k is an excellent heating unit that can satisfy the needs of a potential client one hundred percent. All components used in this model are produced on modern equipment in Korea and partly in Japan, which guarantees a long service life of the equipment. At the same time, the assembly process of gas boilers is carried out at the company’s own industrial complexes located in South Korea.

It is worth noting that the manufacturer practices very strict quality control according to ISO 9001 standards. Thus, when purchasing a NAVIEN ACE 24k Coaxial unit, you can be sure that the device will serve you for many years without any problems.

This model is deservedly in demand in many countries. It can rightfully be considered successful, since it has been chosen by thousands of buyers in Asia, Europe and America. NAVIEN ACE 24k Turbo is a very durable equipment that is in no way inferior to its more expensive European competitors. To be convinced of its advantages, it is enough to get a little closer to the technical features of the unit.

Connection instructions

Installing the boiler is not difficult - you just need to install anchor bolts and hang the unit on the wall.

It is recommended to install elastic gaskets between the housing and the wall to dampen noise. Do not install the equipment on fragile or weak structures - plasterboard partitions or other similar surfaces.

You need a solid brick or concrete wall that can support the weight of the boiler (about 30 kg).

Communications should be connected to the appropriate pipes. It is necessary to carefully monitor the compliance and tightness of connections.

The main attention should be paid to connecting gas pipes. Check all connections for leaks using a soap solution

If there is a common chimney, separate pipeline connections are used - the air channel is led out into the street through the wall, and the smoke channel is connected to the common chimney of the house.

Coaxial chimneys are led outside through the wall, which is much simpler and more convenient for installation.

Precautionary measures

The room where the boiler is located must be well ventilated.

Gas cylinders, if used, should be stored in a separate cool room.

Do not dry things on gas heating pipes.

The power supply parameters must meet the requirements for the specific model (For example, 220V, 50 Hz).

The unit must be plugged into a separate outlet (other devices cannot be plugged into it); extension cords and adapters are not allowed.

Do not touch the body of the device with wet hands or plug it into the mains.

A working device must be in a protective housing.

You cannot install or repair gas equipment yourself - this is the work of government services. Once a year, these services will conduct a preventive inspection of the boiler.

Periodically you need to check all joints of the boiler and pipeline for leaks. Applying a thick soap solution will show if there is a gas leak.

If bubbles appear, immediately turn off the gas valve, provide air flow and call emergency services.

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.

Smooth operation of boilers from the line

When buying a Navien double-circuit wall-mounted gas boiler for your home, reviews about which indicate consumer satisfaction with the quality of the device, the owner can count on making the right choice. Korean heating equipment is manufactured taking into account the smallest details and is distinguished by its adaptability to work in difficult conditions.

For example, a double-circuit wall-mounted gas boiler Navien, the price of which depends on power, is equipped with systems that prepare the optimal composition of the gas-air mixture. By getting a certain amount of gas and air into the chamber, manufacturers allowed the boilers to operate more efficiently. When burned, a properly prepared gas-air mixture releases maximum heat and allows for efficient use of resources.

Korean boilers are distinguished by their compliance with environmental requirements and ensure a minimum amount of emissions into the atmosphere during their operation.

They will be a worthy choice for homeowners who want to make their personal contribution to preserving the planet. Consumers should take into account that with compact body dimensions, Korean boilers produce the required amount of heat and spend a minimum amount of gas and electricity for this process.

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

Floor models from Navien

Floor-standing gas models are presented in the GA/GST series in several power options. You can buy a device with a minimum power of 11.6 kW or a maximum of 40.7 kW.

They use natural and liquefied gas boilers and can heat a house of 400 square meters. meters. Floor-standing boilers of this series are presented in a double-circuit design.

• Navien gas boilers are equipped with a universal smoke removal system. Due to the use of a silent burner, combustion products can be discharged both through the outer wall and through the existing chimney;
• The boiler can be called an “endless source of hot water”, since it can operate at a minimum pressure of 0.1 bar;
• Floor heating devices also operate at low gas pressure. If the gas is supplied at a pressure of 4 Mbar, this will not be a problem for the boiler; it will be able to heat the room uninterruptedly;
• Navien floor-standing models use gas very economically - the average consumption is 2.5 m3/hour;
• The heat exchanger of gas models is made of stainless steel;

You can buy a floor-standing device from Navien for 580 USD, the same price as a boiler with a capacity of 11.6 kW. You can also buy a more powerful gas floor-standing appliance - a model in “golden” color with a power of 40 kW will cost 890-920 USD.

Reviews of powerful equipment note its operational reliability and relatively low (if we take into account famous brands) cost, as for such a heating boiler. True, reviews also say that a double-circuit boiler, although it operates at a minimum pressure, will not be able to efficiently cope with several points

True, reviews also say that although a double-circuit boiler operates at a minimum pressure, it will not be able to efficiently cope with several points.

Model range and their characteristics

Currently, the presented company offers 3 types of wall heating devices:

• atmospheric;
• turbocharged;
• condensation

Atmospheric gas boilers Navien

Atmospheric units with an open combustion chamber are represented by the Navien Atmo modification. It is designed to work in harsh conditions with differences in gas pressure (in the range of 8 -17 mbar) and water in the pipeline (from 0.6 to 8 bar). The power of such boilers ranges from 13 to 24 kW. The coolant can heat up to 80°C, and hot water up to 60°C with a production of 10 liters per minute. To remove combustion products, gas boilers are equipped with classic chimneys. The heating circuit is made of copper, the heat exchanger for supplying hot water is made of stainless steel.

… Note! Only double-circuit units, both wall-mounted and floor-mounted, are supplied to Russia and the CIS countries. A gas boiler with an open combustion chamber is controlled using a remote control

Also, Navien Atmo heating devices have a protection system against freezing of the coolant. The efficiency of boilers of this series is 86%

A gas boiler with an open combustion chamber is controlled using a remote control. Also, Navien Atmo heating devices have a protection system against freezing of the coolant. The efficiency of boilers of this series is 86%.

Turbocharged Navien units

The line of devices with a closed combustion chamber consists of 3 series:

• Prime includes devices with a power of 13-35 kW;
• Deluxe consists of heat generators from 13 to 40 kW;
• Smart TOK includes models from 13-35 kW.

Air is forced into the closed combustion chamber of a gas boiler from the street using a fan through a coaxial pipe. A chimney of this type has compact dimensions and is easier to install than a classic one. Thanks to this air supply system, units with a closed combustion chamber provide a high efficiency of 93%.

Navien Deluxe gas boilers are able to withstand voltage drops in the electrical network of ±30 V from the nominal 220 V. At the same time, the units operate without stops or failures, which significantly extends their service life. They are equipped with a frost protection system that works as follows:

• when the coolant cools down to 6°C, heating is automatically turned on until its temperature reaches 20°C;
• If the water in the heating circuit is cooled to 9°C, the circulation pump starts, which forces the liquid to circulate in the system.

Note! Gas boilers that come with a coaxial pipe are labeled Deluxe Coaxial. Heat generators of the Prime line are distinguished by the presence of an additional weather-dependent module that controls the operation of the boiler depending on the weather conditions outside

The SmartTOK series has maximum automation - these boilers can be controlled using a mobile application on a smartphone

Heat generators of the Prime line are distinguished by the presence of an additional weather-dependent module that controls the operation of the boiler depending on the weather conditions outside. The SmartTOK series has maximum automation - these boilers can be controlled using a mobile application on a smartphone.

Condensing boilers

Navien condensing wall-mounted gas boilers are represented by the NCN and NCB series. Their efficiency is much higher due to the use of heat from condensate and amounts to 99-108%. The heat exchangers of the units are made of stainless steel.

The configuration of condensing boilers is similar to turbocharged ones, but the controller has an increased number of functions, for example, the ability to set a certain indoor climate for a week in advance.

The Navien NCN series includes 4 units with a capacity from 22 to 40 kW, and the Navien NCB series includes 4 boilers with a capacity from 24 to 40 kW.

In condensing boilers, hot water is heated to 65°C, and the coolant is heated to 90°C. The presented heating devices can withstand water pressure up to 10 Bar. Air supply occurs using both a coaxial and a conventional chimney. But do not forget that in the second case, the gas boiler will take air from the room and will require a separate furnace.

Note! All spare parts for wall-mounted gas boilers navien are produced only by this company, unlike European heat generators, whose components are from different manufacturers.

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.

Possible malfunctions and repairs

Korean Navien boilers, according to experts, rarely fail. Moreover, they notice that most faults are easily fixed by users themselves. This is partly achieved due to the fact that boilers from this manufacturer are capable of producing an error code, which makes it easy to determine what went wrong. Problems often occur if the boiler is turned off incorrectly for the summer. And sometimes it’s enough just to turn the device off and on for it to work correctly.

The most common types of faults are:

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

Navien boilers have basic error codes that make it easy to identify and troubleshoot problems. Of course, in order not to lose the warranty on the device, it is best to immediately contact a service center if there is a problem. Quite often the number “01” appears on the display, which indicates that the pressure has decreased or a blockage has occurred. This error may also mean that the circulation pump is faulty.

To eliminate this error, you need to start by checking the filter that is in the heating system. There should be no air pockets in it. If they are, then the bleeding procedure should be done. It can be done on the radiators themselves. The next point is to check the serviceability of the circulation pump. Also important is the coil resistance. The impeller, which is located in the pump, must function fully and be without damage. Moreover, it is better to entrust everything related to the pump to a specialist rather than take risks, since gas equipment does not tolerate amateurishness.

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

Also, the maximum temperature value may be displayed on the remote control, but the water from the tap will flow cold. Moreover, this may not affect the heating. In this case, the problem may be insufficient water flow or air pockets.

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

To eliminate the error, you must first bleed the air and adjust the pressure. After this, it is worth conducting an analysis of the coil resistance, and also checking the impeller for damage. It would also be useful to check the normal operation of the flow sensor. If it does not work correctly, it must be disassembled and the flag cleaned.

For more information on the causes and method of eliminating error code “02”, see the following video.

Code “10” is displayed if the fan does not work. For example, it may be bent or the problem may arise due to incorrect connection of the tubes from the air pressure sensor. These tubes should be connected to the fan volutes. Also, this error may appear when the chimney is clogged or even simply during strong gusts of wind.

Ways to solve the problem most often come down to replacing the fan. Sometimes you just need to clean your chimney. You also need to check the correct connection of the tubes to the fan volutes. In the latter case, if everything is done correctly, there should be an inflection point.

It happens that the boiler often turns on with noise, but the error does not appear 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 operational longer. At a minimum, if such a problem occurs, the heat exchanger should be removed and cleaned. However, it must be taken into account that after 5 years of using the boiler, it is impossible to clean the heat exchanger.

Code “011” appears if the coolant is filled with low-quality water. Most often, this error occurs with Navien Ace boilers.

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.

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

the design of such equipment is created specifically for operation in fairly harsh conditions

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

The efficiency of this heating equipment is 110%

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

Units of this type are quite easy to operate.

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.

Existing types by number of circuits

There are two design options:

• Single-circuit. They provide only space heating.
• Dual-circuit. They provide hot water and at the same time supply coolant to the heating system.

The first option is usually chosen if there is a connection to a centralized water supply system. The second type of boiler is used in private homes where there is no centralized hot water supply.

Most users unanimously choose dual-circuit units, as they are economical and allow you to get maximum functionality for relatively little money.

Turbocharged boilers Navien Deluxe Coaxial

Deluxe and turbo models differ in the method of connecting the chimney.

The Navien Deluxe gas boiler needs to be hung on the wall, it is double-circuit, the combustion chamber is sealed. This means that it can heat water in two directions at once: heating and hot water. Air for the fire is supplied not from the room, but from the street through a coaxial chimney. A turbine is installed above the burner to take in air and exhaust gases. It operates from the mains and without it the boiler cannot function.

This heater is designed to work in our conditions. This applies to gas pressure, coolant quality, and harsh Russian winters. This unit has a useful feature that prevents the system from defrosting. According to reviews, this option in Navien gas boilers has saved more than one circuit. When the coolant temperature drops to 10 degrees, the circulation pump automatically turns on. It circulates the liquid around the circuit so that it does not freeze. If the temperature continues to drop and reaches 6 degrees, then the boiler turns on and heats the liquid to 21 degrees.

The burner is made of stainless steel. Its switching on and off can be adjusted according to the required room temperature. The heater easily tolerates:

• water pressure drop to 0.1 bar;
• gas pressure drop to 4 atmospheres;
• Navien boiler malfunctions associated with voltage surges are excluded.

Heaters of this line are available with a power of 10, 13, 16, 20, 24, 30 kW. Power can be adjusted. The boiler heats water for heating in the range of 40-80 degrees, and for hot water 30-60 degrees. To remove gas combustion products, a 75/70, 60/100 or 80x80 chimney can be connected to the heater.

How to install a wall-mounted boiler step by step

Installation of Navien gas boilers is carried out in accordance with the gasification project, carried out according to technical specifications issued by the regional department of the gas service and approved by regulatory authorities: architecture, SES, fire inspection and others, in accordance with the requirements of directive materials for the safe operation of gas equipment.

Step-by-step installation of a wall-mounted boiler:

1. The choice of installation location and preparation of the wall for placing the Navien boiler is carried out according to the project. Since the weight of the structure is 25-35 kg, the wall on which the device will be mounted must be solid or additionally reinforced to withstand the load.
2. Install an anchor bolt to securely fasten the structure.
3. Install thermal insulation and a buffer panel, for example, rubber, on the wall to prevent vibration of the Navien Deluxe boiler and background noise.
4. Install the Navien unit strictly in a horizontal position, maintaining a distance of at least 60 cm on all sides for repair and maintenance.
5. Connect to an electrical line with a voltage of 230 V. The socket for connecting the device must be individual and located at a distance of no more than 300 mm from the housing. Boiler equipment must be grounded.
6. Connect the unit to the gas pipeline directly. No other gas equipment should be connected to this area. The installation site must be firmly secured to prevent independent dismantling of parts.
7. Connect to a water supply with a diameter of 15 mm or 1/2″. A shut-off and control valve is installed at the entry point of cold water into the unit. The water pressure should be in the range from 1 kgf/cm2 to 6 kgf/cm2. Otherwise, you will need to apply methods to increase/decrease the pressure in the water supply.

8. The unit is connected to heating systems. When connecting pipes to the battery, a manual or automatic air vent is installed on the top part to remove air from the network.
9. All connection areas are secured using mounting couplings or mounting nuts.
10. Perform thermal insulation of pipes and collectors.
11. Install the thermostat on the wall in a heated room, with a distance of 1.5 m from the floor.

A Navien boiler with a natural smoke exhaust system is installed in a room with reliable fresh air ventilation, capable of providing 3 times air circulation.

The cross-section of the chimney must correspond to the smoke pipe of the Navien gas boiler. The diagram of the chimney and its geometric dimensions must correspond to the diagram specified by the manufacturer in the technical documentation of the boiler.

The main requirements when installing elements of the chimney system:

1. Along the entire length of the chimney, its diameter must be without kinks, equal to or greater than the smoke pipe of the unit.
2. The chimney is installed vertically. If the diagram contains horizontal sections, then their length should be no more than 2 m. An inspection is installed in this section to clean the smoke exhaust system.
3. The cross-section of the chimney is made round, since in rectangular and square structures there are stagnant zones in which soot accumulates and draft decreases.
4. The metal of the chimney is stainless steel.
5. A deflector is installed on the chimney.
6. In the lower part, in the area of ​​the tee or support, install a plug with a condensate drain.