Design, principle of operation, hydraulic and electrical diagram of the Navien boiler

Heating installations with Korean “roots”, Navien, are often used both in private country houses and in apartments.

What is the reason for such popularity, what design features does the equipment have, and what difficulties may a consumer encounter when purchasing a Navien gas boiler?

Instructions for safe use (operation), selection of model and proper care. We'll tell you about everything further.

Features of the Navien gas boiler

Navien produces devices of various capacities designed to provide heating for gas-fired homes. However, the technical features of the models allow them to be converted to an autonomous gas supply, that is, connected to cylinders.

A wide range of models allows you to choose a model to suit any needs and capabilities.

• wall and floor;
• single-circuit and with hot water supply;
• with atmospheric and closed combustion chamber;
• with different heating outlet sizes (three options: 20, 25, 32);
• with different chimney diameters;
• and of course, the models differ in power and size.

The manufacturer did not neglect the design.

The devices have an elegant appearance and fit well into a kitchen or any other interior.

Security systems supplied with Navien boilers:

• Modulated turbocharging.
• Protection against coolant freezing.
• A special chip (SMPS) protects against 30% power surges.
• A control panel with a temperature sensor that allows you to maintain t constant and adjust the operation of the boiler to special circumstances.

Modulated turbocharging. The system is based on the interaction of a fan supplying combustion air and a pressure sensor (APS).

The fan rotation intensity changes in proportion to how much gas is supplied at the moment. This allows you to use resources economically and increase efficiency without wasting fuel.

Owners take the choice of equipment such as a gas boiler seriously. Read information about the Baxi gas boiler, the manufacturer, as well as the unit models on our website.

Read about the purpose of an air valve for heating here. Operating principle and design features.

And in this topic https://microklimat.pro/sistemy-otopleniya/elektricheskoe-dachnogo-doma.html we will consider options for electric heating of a private house. Types of electric heaters and electric boilers.

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.

Important ! The model is equipped with a closed firebox with an outdoor cold air intake.

Deluxe Coaxial 16K

This is a wall-mounted model with a closed combustion chamber and two heating circuits. The turbocharged fan changes speed based on a signal from the built-in air sensor, which ensures complete combustion of fuel in the firebox, which reduces heat loss through flue gas emissions and increases the efficiency of the installation to 91%.

Benefits of Deluxe Coaxial 16K:

• High performance for hot water supply and heating;
• low contamination of the coolant in the heating system;
• low maintenance and repair costs;
• room temperature control;
• Russified control panel with a large LCD display;
• optimal balance of the gas-air mixture;
• innovative mode of modulation of the gas burner device;
• high-quality warranty service;
• easy setup of the Navien boiler;
• low cost of chimneys and gas transmission systems.

Design and main elements of the boiler

It is important to know your boiler in order to carry out basic maintenance. Although the model may vary from model to model, the main elements can be found in the case:

• combustion chamber;
• heat exchanger;
• expansion tank;
• gas burner;
• circulation pump;
• Control block.

Particular attention should be paid to the design of the lower part of the case, since this is where the inputs and outputs of the circuits are connected, and other important parts are located.

Navien boiler diagram

Closer to the wall there are 4 connecting pipes:

1. Feed input.
2. Return inlet (with safety valve).
3. Hot water outlet.
4. Cold water.

Next is a small gas supply pipe.

In front of the return inlet there is a hot water filter, and even closer there is a drain plug.

In front of the DHW outlet there is a make-up tap, through which the system is filled with water.

If the temperature continues to drop and it reaches -6°, the burner is activated, which heats the water to +21°.

Device

The Navien Deluxe Coaxial 24 kW gas boiler is equipped with a closed combustion chamber and a separate heat exchanger for coolant and hot water . Produces simultaneous heating of the heating system coolant (HS) and hot water for domestic needs (DHW).

The combustion products are removed using a European (coaxial) smoke removal system.

Under the chimney there is a tubular heat exchanger, below which there is a burner . An 8-liter expansion tank is installed on the left side of the casing, under which there is a circulation pump.

Cold water and coolant entering the boiler pass through heat exchangers and, in a heated state, are sent to the appropriate systems. To regulate the temperature in the systems, a three-way valve is used. Turbocharging is provided by a fan that supplies fresh air to the combustion chamber.

Operating modes

Like many heating appliances, Navien boilers have winter and summer operating modes. On the display, the mode change button is indicated by the “Snowflake” and “Sun” icons.

By pressing this button again, you can change the options:

• Winter mode activates heating and hot water supply.
• Summer is only hot water supply for household needs.

You can adjust the coolant temperature on the remote control when the heating radiator icon lights up on the display.

In some models, to do this you need to press the “Heating Mode” button, in others you need to turn the knob with this icon.

A flashing radiator icon means that the numbers you see show the set temperature of the coolant.

If the “radiator” just lights up, the actual temperature in the heating is displayed.

Having selected “radiator”, you need to press the “+” or “-” keys to increase or decrease the temperature. A few seconds after the desired temperature is set, the radiator icon stops blinking, and the display will show what temperature the coolant is now, and the device will begin to gradually heat it (or cool it) to the selected one.

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.

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

Video on the topic

Filling the boiler and heating system with water

Error code 02 indicates that there was an attempt to start the boiler, but there is no water in the system, or there is not enough water. What to do:

1. The appliance is unplugged and the gas supply is cut off.
2. At the bottom of the boiler, among many elements, you need to find a make-up valve. Turning it counterclockwise opens it, and turning it clockwise closes it.
3. When the tap is open, monitor the pressure gauge. You need to close the tap when it shows 1.3 - 2 bar.
4. Now the boiler is connected again, gas is supplied and the start is made.

Don't worry if error 02 appears again. This may be caused by the fact that after bleeding the air (which is automatically done at startup), the water level is again insufficient. The filling operation must be repeated.

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.

Draining water from the boiler and hot water supply system

If the boiler is not planned to be used for a long time (especially in winter), it is recommended to drain all water from the heating and hot water circuits. What to do:

1. The unit is de-energized and the gas valve is closed.
2. The valves of the heating system (2 pieces) and cold water are closed.
3. The tap that is usually used opens (above the sink, for example) and drains hot water from the system.
4. The tap in the DHW system is closed.
5. A plug is opened at the bottom of the housing and water from the heating is drained.

Cleaning the heating water filter

Filters collect all the impurities contained in the water.

They need to be cleaned periodically, for this:

1. Drain the water (see previous paragraph).
2. Wait until the equipment cools down completely.
3. There is a filter located not far from the drain plug. To remove it, first remove the mounting bracket, then pull out the filter itself.
4. It must be rinsed under pressure with clean water.
5. Then reassemble in reverse order.

If the filters are not cleaned in time, the boiler will overheat.

Possible malfunctions and ways to eliminate them

Navien error codes:

• 01 – overheating (check if the pump is working and if the filter is clogged).
• 03 – no gas (check if the tap is open).
• 04 – false flame signal (check the serviceability of the gas valve, replace the electrodes or board).
• 05 – 06 – Short circuit on the temperature sensor or open circuit.
• 09 – problems with the fan.
• 10 – problems with smoke removal (check the operation of the fan, whether the chimney is clogged, whether the fan pipes are connected correctly, gusty wind could also be the cause).
• 013 – Short circuit on the OM flow sensor.

If the boiler does not give any errors, but works much worse, the reason may be a clogged filter or an airy system.

Navien boilers, like any other equipment, require good care and proper handling. Regular checks and service control will help avoid breakdowns.

Installation of an internal electrical network is an important stage in the arrangement of a new building. Electricity in a private house with your own hands - how to do the wiring correctly? Read the advice of professionals.

For recommendations on making a gas burner for a boiler with your own hands, read the link.

Possible error codes

Error codes for troubleshooting the problem yourself
To independently diagnose possible malfunctions of boiler equipment, the user will need to familiarize themselves with the characteristic error codes. Despite the many potential breakdowns of the unit, they all come down to a limited number of codes. By deciphering them, even an inexperienced user will be able to independently diagnose and then fix the problem.

• 01E – overheating of equipment components, recorded by a separate temperature sensor.
• 02E – means a break in the coolant flow sensor circuit and a decrease in its level in each of the circuits.
• Error 03 indicates the absence of a signal confirming the operation of the burner (the fire may actually be present).
• 04E – the opposite of the previous error. Indicates a short circuit in the flame control sensor circuit.
• 05E – malfunction of the media temperature control line in the system.
• 06E – additional temperature sensor malfunction code associated with a short circuit in its circuit.
• 07E – malfunction of the measurement chain for the same indicator in the DHW circuit.
• 08E – error in the same circuit, but indicating a short circuit in it.
• 09E – incorrect operation of the built-in fan.
• 10E – problems with the smoke removal system from the boiler.
• 12E – physical absence of flame in the burner.
• 13E – Short circuit in the flow channel sensor in both circuits.
• 14E – lack of gas supply to the burner from the operating mains.
• 15E – problems with the electronic board, without indicating a specific cause of the failure.
• 16E – appears when the equipment case overheats.
• 18E – problems with the smoke residue removal sensor itself (overheating of its housing).
• 27E – the electronics have detected an error in the air pressure sensor (APS).

No specific instructions for repairing samples of boiler equipment are provided, since restoration work is carried out by specialists from a service company. You can fix only the simplest problems yourself, which boil down to resetting and restarting the system.

Design features of Navien gas boilers

Manufacturers of Navien produce devices of different capacities, floor-mounted, wall-mounted and with a hot water supply function. They can be connected both to a centralized line and to gas cylinders. The units have a modern appearance that allows them to fit into any home interior. Navien gas boilers are equipped with a safety group, which includes:

• modulating turbocharging;
• protection against coolant freezing;
• SMPS chip that protects against power surges;
• temperature sensor control panel, which allows you to adjust the operation of the unit to certain circumstances.

The most common model of Navien gas units is Deluxe, so let’s look at them in more detail.

For which rooms is it best suited?

Navien gas boilers are designed for heating and providing hot water supply to residential and industrial premises.

In particular, Navien Deluxe Coaxial 24 kW is designed to serve an area of ​​up to 240 m2 . It is ideal for rooms with low water pressure (or pressure differences) and is adapted to voltage fluctuations in the range of 30% of the nominal 230 V.

Most often they are installed in private houses or cottages that have the appropriate area and hot water needs.

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.

Navien wall-mounted gas boilers - model range, pros and cons

How they work and what are the advantages of Navien Ace gas boilers

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. 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.

User manual

Maximum comfort and long-term operation of boiler equipment are possible only under the following conditions:

• constant monitoring of the quality (hardness) of the water entering it;
• high-quality sound insulation of the room allocated for the unit;
• the presence of effective ventilation at its location.

To fulfill the first condition, you will need to constantly check the liquid coarse filter and, if necessary, clean it (replace with a new product). It is also important to periodically monitor the pressure and temperature in the equipment circuits, the values ​​of which must correspond to the passport values. If these requirements are met, no problems arise during the operation of the unit; the Navien Deluxe boiler operates without failures or breakdowns.

How to increase the time between starting and shutting down a gas boiler?

If there is a problem with frequent switching on and off (“clocking”) of a gas boiler, you can change the difference between starting and stopping the unit. This is possible using the Navien engineering menu:

1. Turn off the remote control and press two buttons “+” and “-” at the same time.
2. A number from 2 to 20 appears on the display. Usually 8 or 10.
3. Use the “+” and “-” keys to increase the delta value between start and shutdown.
4. After 5 seconds, the remote control goes out.
5. The boiler is turned off and then turned on again.

Boiler equipment

The design of the unit includes:

• Two heat exchangers are made of stainless steel, which guarantees their long and reliable operation.
• Remote display of the control unit, which is completely Russified. For the Russian consumer this is a very important condition.
• Built-in circulation pump.
• Expansion tank.
• Safety valve.
• Air vent operating in automatic mode.
• A bypass valve, which is also adjusted automatically.
• Traction sensor.
• Electric current stabilizer.
• Remote control, which is convenient in terms of maintenance.

The South Korean boiler navien ace is fully equipped with Japanese automation. In this case, the manufacturer provides a warranty period of 2 years. This is a fairly compact device with excellent technical characteristics. The operating instructions for Navien boilers make it easy to understand all the intricacies of setting up the device, modes and temperature ranges.

Advantages and disadvantages

The advantages of gas boilers Navien Deluxe Coaxial 24 kW include:

• Intelligent remote control.
• Modulating burners with the ability to adjust temperature and low temperature load on structural parts are used.
• There is voice guidance to make it easier to control.
• The units are adapted to Russian conditions, adapted to work with changing gas pressure.
• There is a self-diagnosis function.
• Optimal combination of cost and quality of equipment.
• Low cost of repairs.

The disadvantages include:

• High noise level during operation.
• For repairs, only original components are required.
• Failures (errors) of the unit often occur due to the high sensitivity of the sensors or other reasons.

Classification

Navien Ace gas boilers are divided into two categories:

The first unit is a simple and traditional boiler with an open combustion chamber, which uses atmospheric exhaust of combustion products. The second is more advanced and has a turbocharged burner. This allows you to efficiently supply gas and burn it when the supply is unstable, which is associated with pressure surges. In addition, the second option is equipped with a special SMPS control system, which is based on highly sensitive chips. They are responsible for monitoring and regulating gas combustion processes. In all other respects, both options are no different from each other.

Both models can be classified as universal equipment. Adapted to difficult operating conditions, they are considered one of the most economical heating devices present on the Russian market today. An important component of the design is the remote control. This is very convenient when you can set modes and indicators from a distance, quickly making adjustments.

But what’s surprising is that Navien gas boilers can operate not only in automatic mode, but also in manual mode. This is especially convenient when the temperature outside the window changes sharply. Manual installation allows you to more accurately set parameters and indicators, which eliminates the smallest errors during the operation of heating equipment.

Navien ace gas boilers can be called universal units. They operate on natural gas or liquefied bottled gas. To switch from one type of gas to another, you only need to change the burner. No other changes are required.

User reviews

You can get the most reliable information about Navien boilers from people who use these devices in their home. Let's look at some of the reviews:

Gas was installed in the house, and I immediately purchased a Navien boiler. I have long dreamed of switching to gas heating, and now I have my own hot water. Now you can live like “white people”, and cook dinner normally, and wash, and in general. In general, I’m more satisfied than ever, there are no problems with the boiler, the installation is simple, I didn’t find any shortcomings. I recommend to everyone.

A gas boiler is an absolutely reliable and trouble-free thing, we have been testing this for ourselves for several years now. It works fine and has never caused any problems. Among the shortcomings we can only name some noise; if we had known, we would have immediately placed it in another place, but all hands can’t get around to moving it.

We recently installed a Navien gas boiler, but from recent impressions we can say that the installation copes with its functions completely. A little annoying is the rather high noise level from turning the burner on and off, which does this quite often in heating mode. In addition, the hot water heating mode is unclear, although, most likely, I have not figured it out yet. In general, the impression of the device is quite positive.

We have been using the Navien gas boiler for about three years. I like everything, it’s warm, there is hot water, everything works as promised by the manufacturer. There are practically no disadvantages, some complain about noise, but our boiler is in a separate room, we don’t hear it. I would say the main disadvantage is the impossibility of working without electricity, and with it we have interruptions. Although, of course, this is not a problem with the boiler, but with the electrical networks.

Navien boilers were installed by the developer in all houses in our village. Either the models were chosen the most unsuccessful, or they were installed poorly, but many leak. In addition, heat exchangers cannot tolerate hard water and quickly become overgrown with scale. However, boilers are inexpensive, which is important when buying a home.

The opinions of different people agree in recognizing the successful, reliable design of the devices, although they have some disadvantages (in particular, noise during operation), but are quite functional and meet the operating requirements.

What to pay attention to during installation?

Since instructions are included with the equipment, there are no problems with installing and connecting the device. Doing it yourself is not a problem. Even a non-professional can understand the instructions. Moreover, it is written in Russian.

The only thing that experts ask you to pay attention to is the method of removing carbon monoxide. They can be discharged through a regular atmospheric chimney connected to the smoke exhaust system of the house or installed as a separate structure. But if you are not satisfied with any option, you can make a coaxial chimney. Its installation is several times simpler. But keep in mind that coaxial structures are used only when the heated area of ​​the house does not exceed 110 m². They can be installed with boilers whose power does not exceed 11 kW.

Installation features

Before purchasing a gas boiler you must:

1. Prepare the installation site. Atmospheric apparatus requires a separate room, at least 2x2 m in size, with exhaust ventilation.
2. The device must be powered from a stabilizer connected to a circuit breaker or outlet that has an emergency shutdown feature.
3. The boiler body must be grounded, so you need to connect a grounding wire to the installation site.
4. The wall where the device will hang, if it is flammable, must be sheathed with non-flammable material.

After purchasing a boiler, the difficult task of connecting it arises. The factory operating instructions recommend engaging an authorized service center specialist for this.

But if you have skills in working with pipes and taps, you can try hanging it on the wall and connecting the device yourself. The factory instructions describe this in detail.

But we must not forget that in any case, you will need to call a gas service specialist to conclude a service agreement and obtain a special permit to operate gas equipment.

Important! Unauthorized connection of gas to the boiler may result in penalties and even criminal prosecution.