Maintenance of Navien gas boilers: instructions on installation, connection and configuration

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Published: 03/11/2020

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The Navien Deluxe gas boiler is a popular climate control device from the South Korean manufacturing corporation KyungDong Navien.

The company is engaged in the production and design of heat-heating equipment that uses various types of fuel in its operation: liquid, solid, gaseous and electricity.

Navien Deluxe is a modern modification of double-circuit gas wall-mounted boilers, released instead of the Navien Ace model.

The complete assembly technological process of the units is carried out at factory facilities in Korea and complies with ISO 9001 quality standards.

• 1 Advantages and disadvantages of Navien Deluxe
• 2 Technical specifications
• 3 What's included in the package
• 4 Basic errors and their elimination
• 5 Installation and connection
• 6 Navien Deluxe Operating Instructions

Range

The assortment of the South Korean company Navien is constantly expanding, which allows customers to purchase gas boilers that are optimally suited in all respects.
Therefore, it is impossible to talk about all representatives of the model range. Instead, we will look at Navien equipment, which can be divided into three broad categories.

1. Wall models. Wall-mounted boilers have a double heat exchanger and are labeled as Ace, Deluxe. Deluxe are dual-circuit models that have a wide power range from 13 to 40 kW. All Deluxe series boilers are turbocharged. Turbocharged Deluxe equipment can have a coaxial or separate chimney. In addition to Deluxe, the Ace series of wall models is in great demand. The Ace series is divided into Turbo and Atmo. The difference between them is that Turbos are fully adapted for operation in conditions of non-steel gas and electricity supply to the boiler. An additional advantage of Ace Turbo is frost protection and burner turbocharging. If we talk about Atmo, then this is a classic gas boiler that perfectly provides heating for a private home. Atmo has all the strengths of the Turbo, except for the turbocharging of the burner.
2. Floor-standing boilers from Navien. If wall-mounted models do not suit you for one reason or another, floor-standing models have earned excellent reviews. They are used for heating and hot water supply of private houses. The distinctive features of floor-standing models of Navien boilers include their compact size, ease of operation and convenient installation. Each boiler is supplied with instructions, according to which even a novice in such matters can carry out the installation. Wall-mounted models are somewhat easier to install, although there are no problems with them. A double heat exchanger significantly increases the efficiency of heat generation in a gas boiler.
3. Condensation. Deluxe, Ace and other models of the Navien company recently received a serious competitor in the form of South Korean condensing boilers. They are marked NCN. Their distinctive feature is increased power, the range of which is 19.6-37.9 kW. These boilers use fuel efficiently, using less fuel but providing higher quality heating. The efficiency of Navien condensing-type boilers reaches 108 percent. This was made possible by using the heat that is released when steam condenses. This way, consumers save money on gas bills, but heat their own homes more efficiently. The heat exchanger here is slightly different. Its design is unique and is distinguished by the presence of a system for preliminary creation of a combustible mixture. The burners are necessarily modulating, the range of operation of which is amazing.

By choosing boilers from the Navien company from the Deluxe, Ace or other ranges, you are buying quality and reliability. This is one of the few cases where the manufacturer does not demand more just for the brand. The high level of Navien boilers is beyond doubt.

Where is it used?

Navien Deluxe gas double-circuit boilers are designed for heating and supplying hot water supply in private homes.

The boiler power corresponds to the area being served, which makes it easier to select the right device.

The use of the Navien Deluxe series is not recommended for heating industrial or public buildings, since the specific capabilities of the equipment in such conditions will not be adequately revealed.

Often such equipment is installed in apartments, if their size allows the installation of equipment of similar power.

Characteristics of Navien Ace ATMO and Navien Ace 20k

The boiler is equipped with uninterruptible voltage.

The company's products include double-circuit boilers with and without turbocharging. The latter belong to the Ace ATMO line. They have the same functions as the turbocharged version. Korean gas boilers Navien Ace reviews are largely positive, which once again indicates the quality of the product.

This unit is equipped with the same chip that ensures uninterrupted operation during power surges as the above-described models. A distinctive feature of the device is the absence of turbocharging, which ensures silent operation.

Navien Ace 20k, like other units of the Korean brand, is fully adapted to the climatic conditions of Russia. The device operates reliably at low gas and water pressure, which allows its use in multi-storey residential buildings. This expands their scope of application. Organizing the removal of combustion products can be carried out in different ways:

• by installing a horizontal (conventional) chimney;
• with a separate smoke removal system;
• by mounting in a vertical position.

It is important to note that some variations of equipment from Navien support remote control using a phone or tablet. is one of the largest Korean equipment manufacturers. Under the NAVIEN brand, gas boilers are supplied to the world market, which are recognized by both specialists and buyers

At the same time, the Korean company is engaged in the production of components for heating systems, as well as related equipment

Under the NAVIEN brand, gas boilers are supplied to the world market, which are recognized by both specialists and buyers. At the same time, the Korean company is engaged in the production of components for heating systems, as well as related equipment

is one of the largest Korean equipment manufacturers. Under the NAVIEN brand, gas boilers are supplied to the world market, which are recognized by both specialists and buyers. At the same time, the Korean company is engaged in the production of components for heating systems, as well as related equipment.

The company's product range is quite wide and includes designs that can provide heat to both small city apartments and large houses. One of the most popular units today is the NAVIEN ACE 24k boiler. This device can rightfully be considered a standard of reliability and excellent build quality. If you are looking for universal heating equipment, choosing this model can be considered more than rational and correct.

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.

Recommendations for use

To ensure that the coolant and sanitary water heater does not malfunction during operation and does not fail prematurely, you must strictly follow the operating rules. You just need to remember them and try not to violate the instructions specified by the manufacturer.

If you do not need the heating system to operate in the next two to three days, do not disconnect the equipment from the power supply. When the power supply is interrupted, the anti-icing system stops. During this time, ice must not grow in the boiler or in the pipes connected to it.

However, if an ice plug has already formed, do not despair. You probably have an effective and quite affordable means to eliminate it at your disposal. Use a hairdryer at home and warm up the pipes. And if he didn’t help, call the gas workers.

If the boiler is planned to be idle for a long time in winter without operation, all water from it and from the systems it treats must be drained. There is no need to create the slightest prerequisites for the circuits to freeze. Believe me, the consequences can be not only dire, but also extremely dangerous.

The control panel of the gas processing unit cannot be installed next to air conditioners, electrical appliances, or heaters. Otherwise, its built-in sensor will record distorted data and the boiler will not work correctly

Before turning on, try to constantly check whether the water supply and heated coolant outlet taps are open, as well as the supply of blue fuel. Do not forget that when working to heat without the medium that the unit is required to process, it may burn out.

Never wipe the body of a running electrical appliance with a damp cloth. If you want to tidy up your Navien gas boiler, see how to turn it off. To do this, first interrupt the operation with the activation button on the remote panel, then disconnect from the power supply line.

Remember that the remote panel must not be positioned in such a way that it inadvertently generates external heat. There is no need to install it in an intensely sunny corner or next to a heating device. This way, all temperature settings will be lost due to the fact that the sensors record an unrealistic temperature.

Filters installed in the heating system must be cleaned regularly to maintain the boiler's performance at peak levels.

Clean the heating system and cold water inlet filters regularly. Their clogging will force the unit to unnecessarily increase the heating power in an attempt to maintain performance. As a result, overheating and failure of important functional systems of the equipment will occur.

If there is a need to convert the Navien boiler to use liquefied gas, invite a gas service employee. He will change the module with gas injectors and reconfigure the boiler. Please note that translation work can be completed independently if you have no doubt that you can carry it out efficiently.

Do not use it yourself and make sure that the invited specialist does not use used pipes to connect gas processing equipment. This is fraught with serious poisoning and damage to property worth a very impressive amount.

Setting up a Navien gas boiler

Next, we’ll look at how to set up a Navien Deluxe gas boiler with your own hands. Manipulations are carried out using a remote control with a built-in room temperature sensor.

Heating settings

To set the heating mode and set the coolant temperature, hold down the button with the image of a radiator until the same icon appears on the screen. If the “radiator” picture blinks, it means that the set coolant temperature is displayed on the screen. If the symbol does not flash, the actual water heating level is displayed.

To set the desired temperature, use the “+” and “-” buttons with the “radiator” icon flashing. The possible range is from 40ºC to 80ºC. Once the temperature is set, it will be automatically saved. The “radiator” icon will blink for a few seconds, after which the actual temperature of the coolant will be displayed on the screen.

Heating with air temperature control

To set the desired air temperature in the room, you need to hold down the “radiator” button until the image “house with thermometer” appears on the screen. It means “Heating with room temperature control” mode.

When the “house with thermometer” symbol is flashing, the desired room temperature is displayed on the screen. When the icon is not flashing, the display shows the actual room temperature.

When the icon is flashing, using the “+” and “-” buttons, the desired level of heating in the room is set, adjustable in the range of 10-40ºC. The temperature is then automatically saved and the icon stops flashing.

Setting the hot water temperature

To set the hot water temperature, you need to hold down the “water tap” button until a similar flashing symbol appears in the right corner. You can then set the desired hot water temperature between 30ºC and 60ºC. The settings will be automatically saved and the “water tap” symbol will stop flashing.

Note! In the “Hot water priority” mode, the water heating temperature is regulated differently. Now let's look at how to configure the Navien Deluxe gas boiler in the "Hot water priority" mode

To activate it, hold down the “water tap” key until the “faucet and light” symbol appears on the screen. Now you can set the desired temperature using the “+” and “-” keys. When changing the DHW temperature, the “water tap” icon should flash above the “tap and light” symbol.

Now let’s look at how to configure the Navien Deluxe gas boiler in the “Hot water priority” mode. To activate it, hold down the “water tap” key until the “faucet and light” symbol appears on the screen. Now you can set the desired temperature using the “+” and “-” keys. While the DHW temperature is changing, the “water tap” icon should flash above the “tap and light” symbol.

The “Hot water priority” mode involves preparing a supply of water at a given temperature even if it is not in use. It allows you to supply heated water to the consumer a few seconds earlier.

Away Mode

The “Away” mode means the gas boiler operates only for preparing hot water. To switch the unit to this mode, you need to press the button that shows an arrow and a water tap. The “water tap” symbol that appears on the screen means that the “Away from Home” mode is set. The actual temperature in the room is displayed next to it.

Note! This mode is convenient for use in the warm season, when hot water supply is necessary, but there is no need for heating

Setting the Timer mode

The “Timer” mode is necessary to set the time for stopping the operation of the gas boiler within the range from 0 to 12 hours. The unit will work for half an hour, turning off for the specified interval.

To set the “Timer” mode, hold down the “radiator” button until the “clock” symbol appears. When the icon is flashing, use the “+” and “-” keys to set the interval time. The set value is saved, the “clock” stops blinking, and the display shows the actual air temperature.

Price range

In most regions of Russia, the cost of Navien Deluxe boilers is in the range of 27-32 thousand rubles. First of all, prices depend on the power of the unit.

In addition, logistics and other factors, overhead costs, etc. are actively involved in pricing. People planning to purchase a boiler should take into account that the total cost will be slightly higher than the price of the unit. This happens because delivery, installation and connection of the device are required.

All these measures should not be carried out independently, since service centers refuse warranty service if the installation was not carried out by their employees.

NOTE! Some stores do not have the authority to draw up a warranty agreement. This point should be clarified, and if necessary, independently conclude a warranty agreement with representatives of the service center.

How to pay for an order

When placing an order, you DO NOT NEED TO PAY ANYTHING.

We receive the order, call you back, clarify all the details, and then send a link to payment or an invoice (for legal entities).

You will find out exact information about payment for your order when you call our manager.

You can pay for your order by credit card.

Payment is made through Yandex Cashier or the payment gateway of Sberbank of Russia.

We will send you a link to payment, where all the necessary information will be indicated: product, quantity, delivery cost.

WE DO NOT COLLECT OR STORE YOUR PAYMENT INFORMATION.

All payments are made through services of maximum reliability (Yandex Cashier and Sberbank) - therefore, your money is safe.

Payment by bank card is made without commission.

Technical device and principle of operation of the Navien gas boiler

Let's consider the design of a double-circuit gas boiler Navien Deluxe Coaxial.

Construction of a Navien gas boiler

The device has two heat exchangers that prepare the coolant (primary) and domestic hot water (secondary). Gas supply lines and cold water are connected to the corresponding pipes, which enters the heat exchangers, where they are heated to certain temperatures. Then, using a circulation pump, the coolant is directed to the heating system of the house.

The entire operation of the device is controlled by an electronic unit that ensures timely switching off/on of the burner and controls the water temperature in both circuits using special sensors. The control board is protected from power surges, but in areas with frequent or significant voltage surges it is necessary to use a stabilizer.

Navien boilers have a remote control unit equipped with a display that shows the current mode, temperature, and other operational parameters of the device. In addition, the display shows an error code detected by the control unit in any system of the device.

How to connect and configure

Installing the boiler does not require any specific actions. Floor-standing devices are installed in a specific place, wall-mounted devices are hung on the wall using a standard hanging rail.

The boiler is mounted using damper pads (rubber, foam rubber, etc.) so that noise during operation does not spread throughout the house. Gas and water pipes, the heating system and hot water supply of the house are connected to the corresponding pipes. An air supply and smoke removal system is also connected (depending on the type of construction).

The boiler is adjusted by bringing the gas pressure to the standard value. To do this, turn off the water supply and use the adjusting screw to adjust the minimum and maximum gas pressure corresponding to operation in different modes. After this, resume the water supply. During operation, it is necessary to periodically check the condition of the boiler connections using a soap solution - if they are not tight, bubbles will appear. If noise or other signs of an unplanned change in operating mode occur, turn off the gas supply and check the condition of the equipment.

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.

Peculiarities

The Navien Deluxe S COAXIAL-24k model has the following overall dimensions - 400x655x255 mm (WxHxD), while the weight is 26 kg. Installation is carried out on the wall, which is convenient and saves space in the room.

Operating principle and main parameters.

To obtain the declared power of 24 kW, the pressure of natural gas must be at 25 mbar, and liquefied gas - 37 mbar (permissible); when these parameters decrease, the thermal power will also drop. ExpertKotel.ru reminds that most often in domestic networks the pressure is 12-20 mbar. The efficiency of the installation, with such values, is at an excellent level and amounts to 91.4%.

Primary heat exchanger. In the case of “Navien Deluxe S COAXIAL-24k”, steel is used, its advantages are budget cost, lightness and tolerance to shocks and deformations, disadvantages are a little more susceptible to corrosion, less durable, an approximate service life of 5-20 years, depending on the intensity of use .

The expansion tank compensates for the expansion of the coolant in the pipes during heating and releases it back into the system when cooling. This maintains constant pressure in the circuit.

A circulation pump is necessary for circulating coolant (water, antifreeze) through the heating circuit; it is a mandatory component of a closed heating system; in our case, the pump is included.

Management and control

The gas boiler “Navien Deluxe S COAXIAL-24k” is electronically controlled and equipped with a display. The advantage of the electronic system is that it does not require the constant presence of a person and can significantly save fuel (as described above), the disadvantage is that it is more complex than a mechanical one and depends on voltage drops in the network (it can fail during surges). The model is equipped with a remote control.

The pressure gauge shows the coolant pressure; this is an important parameter, because... exceeding it can lead to breakdown of individual parts or the system as a whole.

Protection systems

Gas control - a useful and necessary function of the burner automatically stops the gas supply if the flame goes out for any reason.

The “Navien Deluxe S COAXIAL-24k” safety valve protects the system from increasing water pressure in the circuit above the maximum permissible norm.

Protection against freezing of the coolant automatically turns on the burner for a short time when the water temperature drops to a critical level and there is a risk of heating defrosting. It is worth remembering that this requires the supply of electricity and gas.

Protection against pump blocking is activated when the boiler installation is idle for a long time; in this case, the pump turns on for a while and turns itself off. The function is useful in summer when the heating circuit is not activated.

Protection against overheating of the coolant turns off the burner if the water temperature reaches abnormal values.

Connection

• The size for connecting the gas pipe is 3/4″.
• The diameter of the coaxial chimney is 60/100 mm.
• Hot water supply - 1/2″.
• To connect the heating circuit - 3/4″.
• Separate chimney - 80x80 mm.

To connect the power supply, a single-phase network (220 volts) with a pure sine wave and grounding is required.

Autonomous operation

If a source is used, then “Navien Deluxe S COAXIAL-24k” will function even if there is a power outage (example in the table below). This is useful when it is necessary to prevent defrosting in winter, or simply to maintain heat and hot water supply.

Advantages and disadvantages

The advantages of the unit are considered to be:

• Easy to use.
• Adjustment of operating modes is carried out from a remote control and does not require any complex or special actions.
• The optimal ratio of quality and cost for such devices.
• Possibility of simultaneous heating of the house and supply of hot water.
• Installation and connection of the boiler is not particularly difficult and can be done independently.
• The equipment is adapted for operation in Russian conditions and is capable of operating at low pressures of water and gas, and also easily tolerates changes and sudden surges in pressure.

The disadvantages are:

• Users unanimously complain about too much noise from the fan and popping noises when starting the burner.
• The stainless steel heat exchanger is less efficient than the copper unit used in other series. The situation is saved to some extent by the presence of turbocharging, but it also speeds up the failure of the unit.
• There is a need to purchase a stabilizer. Despite manufacturers’ assurances of the ability to automatically compensate for network fluctuations within 30% of the nominal value, in practice the boilers simply turn off. Another disadvantage is the inability to operate autonomously without electricity. Any shutdown is fraught with the cessation of heating with unpredictable consequences.

IMPORTANT! Both the advantages and disadvantages of Navien boilers are for the most part inherent in all such units and can be considered design features of the units.

What's included

The equipment of this company provides an advanced control principle with a remote control capable of adjusting parameters and modes. The unit has a built-in thermostat sensor function to control and maintain the temperature in the house.

Engineering distinctive characteristics of the modification:

1. Highly efficient stainless steel heat exchangers separated along the heating and hot water circuits with a high heat transfer coefficient.
2. Automatic maintenance of the set coolant pressure in the heating system.
3. Filter for purifying make-up water from suspended solids and hardness salts.
4. Drainage system for draining coolant from the coils of heat exchangers.
5. The circulation pump, ensuring constant circulation of the coolant, ensures maximum heat removal from the boiler and reduces heating costs.
6. Temperature adjustment with an accuracy of 0.1C.
7. Setting the summer and winter operating modes of the unit.
8. Safety group with safety relief valve and air vent.
9. Boiler feed group with a centrifugal pump.
10. Smoke exhaust system.
11. Turbocharger fan installed at the inlet to the firebox.

Navien boiler error 10

This error is related to the smoke removal system of the gas boiler. Combustion products must be removed; for this purpose, the boilers are equipped with a fan. To control the operation of the fan and determine the presence of permissible draft for boiler operation, a differential relay is used, which is connected to the turbine by two plastic tubes. When the fan is running, a vacuum is created, the relay closes, and the boiler functions normally.

Reasons for error 10

may be a clogged chimney, the presence of reverse draft, or incorrect connection of the air pressure control sensor to the fan. For the latter case, you need to check that the yellow tube is connected to the bottom of the fan, and the transparent one is connected to the top, and the tubes themselves are not damaged, deformed or condensation inside.

Increased resistance in the chimney can occur due to direct gusts of wind or blockage of the chimney (bird nest or cobwebs, freezing in winter). That's right, the location of the chimney should be taken into account the direction of the winds of a particular region at the design stage and the chimney should not be installed on the leeward side of the house.

We focused on the most common malfunctions of Navien boilers, but in fact there are significantly more error codes. Methods for checking and troubleshooting are the topic of a separate article. For convenience, here is a summary table of codes with a brief description:

Specifications

Modern Navien units are equipped with a remote control panel, which receives a signal from a temperature sensor.

Its readings are instantly transmitted to the control unit chip, which gives a signal to the actuator to increase/decrease the gas flow rate to the double-circuit boiler. Similarly, a command may be received to completely shut down the unit if an emergency situation occurs in its operation.

The most popular modifications of Navien gas boilers are double-circuit wall-mounted units with a closed firebox, a thermal power of 20-24 kW, capable of efficiently heating a room from 160 to 240 m2 and preparing hot water for the domestic needs of a family of 4 people.

Technical characteristics of Navien wall-mounted gas units with a closed combustion chamber:

1. Navien Deluxe Plus - 20k, heating - 160 m2, maximum/minimum performance - 20/9 kW, expansion tank - 8 l, electric pump - yes, heating + hot water, efficiency - 91.7% gas consumption - 2.15 m3/hour, price - 31,080 rub.
2. Navien Deluxe Plus - 24k, heating - 192 m2, maximum/minimum performance - 24/9 kW, expansion tank - 7.5 l, electric pump - yes, heating + DHW, efficiency -90.5%, heat exchanger - steel, gas consumption - 2.58 m3/ hour, price - 31,230 rub.
3. Navien Deluxe Plus -24k COAXIAL, power 24 kW, heating - 240 m2, maximum/minimum performance - 24/9 kW, expansion tank - yes, electric pump - yes, heating + hot water, efficiency - 90.5%, heat exchanger - steel, gas consumption — 2.58 m3/hour, price — 28,500 rub.
4. Navien ACE-20AN, heating -190 m2, natural combustion, maximum/minimum performance - 20/9 kW, expansion tank - yes, electric pump - yes, heating + hot water, efficiency - 91%, heat exchanger - plate, gas flow - 2.06 m3 /hour, price - 29,130 ​​rub.
5. Navien Deluxe - 20k White, heating - 186 m2, maximum/minimum performance - 20/9 kW, expansion tank - yes, electric pump - yes, heating + hot water, efficiency - 90.5%, heat exchanger - steel, gas consumption - 2.15 m3/hour , price — 32,160 rub.
6. Navien Deluxe - 24k White, heating - 220 m2, maximum/minimum performance - 24/9 kW, expansion tank - yes, electric pump - yes, heating + hot water, efficiency - 91.5%, heat exchanger - steel, gas consumption - 2.58 m3/hour , price — 29,980 rub.
7. Navien Deluxe-20k COAXIAL White, heating - 190 m2, maximum/minimum performance - 20/9 kW, expansion tank - yes, electric pump - yes, heating + hot water, efficiency - 90.5%, heat exchanger - steel, gas consumption - 2.15 m3/ hour, price - 32,160 rub.
8. Navien Deluxe-24k COAXIAL White, heating - 220 m2, maximum/minimum performance - 24/9 kW, expansion tank - yes, electric pump - yes, heating + hot water supply, efficiency - 90.5%, heat exchanger - steel, gas flow - 2.15 m3/ hour, price - 29,090 rub.
9. Navien SmartTok - 24K, heating - 220 m2, maximum/minimum performance - 24/9 kW, expansion tank - yes, electric pump - yes, heating + hot water, efficiency - 91.0%, heat exchanger - steel, gas consumption - 2.6 m3/hour, price — 34,430 rub.
10. Navien Deluxe S COAXIAL-24k, heating - 200 m2, maximum/minimum performance - 24/9 kW, expansion tank - yes, electric pump - yes, heating + hot water supply, efficiency - 91.2%, heat exchanger - steel, gas consumption - 2.58 m3/ hour, price - 31,060 rub.

Date: September 25, 2022

How does this model differ from other representatives of the series?

The series includes the following models:

• Navien Deluxe Coaxial 24k.
• Navien Deluxe Plus 24k.
• Navien Deluxe 24k.

The differences between the models are small. The “Coaxial” model is designed for the use of a horizontal coaxial chimney (pipe-in-pipe type), which is convenient for installation in an already inhabited house.

It does not require complex organization of the passage of the chimney through the ceilings and roof. The “Plus” model has a control panel built directly into the body, which is convenient when installing the unit in the kitchen.

The basic Navien Deluxe model has two pipes for removing combustion products and supplying fresh air, separate for each line.

They can be connected either to vertical pipelines or through the wall.