Gas boiler Navien Ace. Characteristics. Is it worth buying?

The high-tech Korean gas boiler Navien is a leader in the heating equipment market. Units with a wide range of power are produced for heat supply to houses with a main gas subscriber station. By design, they can operate on liquefied gas. The model range allows buyers to make a fine selection of equipment based on real technical conditions and financial capabilities. They have an impeccable minimalist design. The elegant appearance of the boiler fits into kitchens of any size and configuration.

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%.

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.

Problems with the heating circuit

The pump must be selected according to the requirements of the heating circuit.

Malfunctions in the operating mode of the heating circuit are not always associated with a malfunction of the main heating element. If the boiler works, but does not heat the batteries, the reason must be sought in the wiring itself.

List of main heating circuit malfunctions:

• the filter on the return line or the needle tap (Maevsky tap) is clogged;
• insufficient power of the circulation pump;
• the rules for installing a heating circuit with natural circulation have not been followed.

Any of the above problems must be resolved before the start of the heating season. Otherwise, the room may be left without heat for several days, since the repair involves completely draining the coolant.

So, why doesn’t the boiler heat the batteries if everything worked fine over the previous years? The reason is a dirt plug that has formed on the heating circuit filter and completely blocks the coolant flow. It can be solved simply - the water is drained from the pipes or its circulation is blocked using bypasses, and the filter is cleaned. To prevent a recurrence of such a situation, it is necessary to completely replace the coolant with parallel flushing of the entire circuit.

In a gravity system, the slope of the pipes is key.

The second reason why the boiler works but the radiators are cold is the insufficient power of the circulation pump. The performance of the device is not enough to pump the entire volume of coolant in a timely and efficient manner. Or the heating system in the house has branches that are located at a significant distance from the pump. As a result, the circulation pump overheats, the heating equipment operates with excessive energy consumption, and the radiators remain cold. The solution is to change the coolant pumping device to a more powerful one.

If the house has a two-pipe heating circuit with natural circulation of water, and during the heating season it is often noticed that the boiler is on and the radiators are cold, then the reason lies in non-compliance with the slope of the main line. According to regulatory documentation, only a pipe slope of 10 mm per linear meter in a heating system with natural circulation will ensure normal coolant movement. The result is uniform heating of the batteries throughout the house. If there is no slope, the coolant stagnates, which negatively affects the temperature of the radiators. The problem can be solved by completely redoing the wiring.

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Operating instructions for Navien gas boilers

This document is a mandatory appendix to the technical documentation provided by the manufacturer when registering the device in the retail chain. Operation is carried out from the control panel, the model offers many modes of use.

"Navien" mounted boiler operating instructions, structure and description of functions:

• Power (POWER) - on / off;
• combustion (COMBUSTION) displays the combustion process;
• pump (PUMP) status of the network circuit circulation pump;
• hot water (HOT WATER) - water heating temperature;
• low level (LOW LEVEL) - emergency water level in the circuit;
• overheating (OVERHEAT) – unacceptably high water temperature;
• sensor (SENSOR) – sensor malfunction;
• reset (MISFIRE) mode on the panel to factory settings.

Why are the radiators cold when the boiler is running?

Low efficiency of the heating system can be the result of malfunctions of both the circuit itself and the main heating element. In the case of a heating device, it is necessary to pay attention to the three-way valve, the functionality of the pump and the technical condition of the heat exchanger. Typical problems for heating wiring are a clogged filter, insufficient power of the circulation pump and lack of slope of the pipes of the circuit with natural water circulation.

During the operation of a double-circuit gas boiler, each user will encounter certain problems associated with the operation of the hot water supply circuit. These problems are inevitable. They always appear, regardless of the manufacturer of the boiler and its heat exchanger, or the design features of the boiler; it does not matter whether the boiler is wall-mounted or floor-standing. Often the boiler begins to heat hot water poorly or not heat it at all. Especially when you use several points at the same time. In this article we will talk about how to get rid of this problem forever.

Starting the boiler

After all installation work has been completed and pressure testing has been carried out, the first commissioning start-up of the boiler equipment is carried out. All work is carried out by service center workers with the preparation of appropriate documents, which in the future will preserve the manufacturer’s warranty obligations.

When starting the Navien boiler, the instructions must be followed impeccably. Sequence of work:

1. The circuits are filled with water through the unit’s make-up unit, built into the structure, with a special tap at the bottom next to the tap water inlet.
2. Monitor the pressure gauge; when the pressure rises to 2.0 atm, close the tap.
3. Remove air pockets. At the first start, it is performed in manual mode, and at subsequent starts, through an automatic system. They start the process from the most distant battery, opening the Mayevsky tap, and alternately go through all the points of the heating circuit.
4. After etching the air plug, the pressure in the circuit will drop, so re-filling will be required.
5. Discharge the air mixture from the circulation pump.
6. To turn on the unit, press the “Power” button.
7. The electric ignition will work and the unit will start, after which it is necessary to adjust the temperature regime.

Settings

“Navien” is programmed for winter (heating and DHW) and summer (DHW) operating modes - with the “Snowflake” and “Sun” icons. The network temperature is adjusted on the LCD remote control when the “radiator” icon on it is lit. In some options, the “Heating Mode” is started, in others the knob is turned. A flashing LED records the set water temperature.

If the icon just lights up without pulsating, the actual temperature in the network is displayed. By selecting the icon, use “+” or “-” to increase or decrease the temperature. After a couple of seconds the LED will stop flashing and show the actual temperature. They regulate the heating temperature from 40.0 C to 80.0 C. If it is set incorrectly, an error code will be displayed.

Note! The DHW temperature is adjusted in the same way, only on the remote control there are pictograms with a tap, the range is from +30 to +60 C.

Tips and recommendations for operating the Navien boiler

The main advice from experts regarding the safe operation of the boiler:

1. The room where the unit is located must have good ventilation.
2. The unit must have a separate independent connection to the electrical network.
3. The boiler must operate in a fully assembled and protective housing.
4. The user is prohibited from independently repairing the gas equipment of the boiler.
5. The boiler must undergo an annual inspection by representatives of Gorgaz.
6. The boiler owner must periodically check the joints of the boiler and the gas pipeline for leaks with a soap solution.

Additional Information. If leaks occur, immediately turn off the gas valve, ventilate the room and call the emergency gas service.

Navien gas boilers have been used by Russian consumers for a long time. They have rightly earned the trust of customers. The lightweight layout with the widest range of modern water heating functions allows you to choose these models from a large list of offers on the heating equipment market.

The range of gas boilers offered by our stores today is very wide. Choosing the most suitable model, in terms of reliability and quality at the lowest price, is a very difficult task. Among the manufacturers of such equipment, the South Korean company Navien occupies not the last place. Giving the potential buyer the necessary information about what a Navien gas boiler is is the purpose of this article.

What to pay attention to during installation

Steel gas boiler Navien Ace

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 exhausted 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

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.

What is the operating principle of Navien boilers?

The operation of Navien boilers is based on the same principles as similar devices from other manufacturers.

Composition and types of boilers

Each such device includes the following main components:

• gas stove;
• gas supply control mechanism;
• heat exchange device.

In a single-circuit modification, hot water immediately enters the heating system of the house. Double-circuit models include an additional water heating circuit for the home hot water supply system (DHW). When this circuit is turned on, the operation of the heating system is suspended.

Exhaust gas removal

Gas combustion chambers in boilers are open (atmospheric) and closed (turbocharged). In atmospheric models, smoke independently leaves the room through the chimney. In turbine engines, exhaust gases are removed by force using a fan through a pipe through the outer wall of the house.

Important! In rooms where a gas boiler is installed, constant exhaust ventilation is required. This is especially important for atmospheric models.

Gas-burners

One of the main components of a gas boiler is, of course, a gas burner. As a rule, modern models are equipped with modulating burners. They allow you to modulate the flame, controlling the gas supply depending on the need to adjust the air temperature in the premises or water in the hot water system. When the device is equipped with an automatically adjustable modulating burner, the heating system will accurately maintain the set temperature.

Control and protection systems

When there is a power failure, the gas boiler stops working; when electricity appears, it starts automatically.

If the gas supply stops, the automation will close the solenoid valve, which will block the possibility of fuel entering the device. In such situations, it is only possible to open the gas supply to the boiler manually.

Modern models have energy saving and freeze protection capabilities. The water temperature is controlled by sensors that ensure automatic heating of the coolant when its temperature drops to a set value.

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.

Characteristics from the technical side

In our market, the Navien company offers double-circuit wall-mounted gas boilers with the following characteristics:

1. Combustion chambers of any type - both open and closed.
2. The power range of manufactured devices allows heating rooms with an area of ​​30 to 400 square meters. m.
3. The dual-circuit modification makes it possible to heat water for the domestic hot water system.
4. Heat exchangers are made of stainless steel.
5. Both liquefied and natural gas can be used to operate boilers.
6. The amount of water produced for the hot water system is determined by the power of the device. For example, a 13 kW device produces water in a volume of up to 11 liters per minute, and with a power of 30 kW - about 17.
7. The electronic control unit has the function of protecting the device from voltage surges in the electrical network.
8. Most models of heating boilers are equipped with a remote control unit that has the following capabilities:
9. the unit displays data on the set temperatures of heating water, hot water in the DHW system and indoor air;
10. the display provides information about any problems that have arisen in the operation of the units;
11. buttons on the unit turn the boiler on and off, set the temperature;
12. The built-in air temperature sensor provides information for regulating the gas burner.

The delivery package for each Nevien gas boiler includes an instruction manual, which describes in detail the rules for working with the control unit. More detailed technical characteristics of the device are also given there.

What's special about ACE 24k Coaxial?

The boiler of this series is a 2-circuit wall-mounted unit that can be easily installed in absolutely any room, be it an apartment, a residential building, a country cottage or an administrative facility. The device has a closed combustion chamber, due to which there is no need to equip a separate boiler room for its installation. You can install NAVIEN Coaxial even in a plumbing unit.

The equipment is well adapted to work in far from simple Russian conditions. It is quite capable of functioning fully at sub-zero temperatures outside the window. Moreover, it is not afraid of low quality coolant and insufficiently stable gas supply. This also applies to voltage drops. And, taking into account the fact that every second family in Russia faces such problems, we can summarize that NAVIEN ACE 24k is suitable for domestic buyers in all respects.

Many manufacturers claim that their unit has the optimal price-quality ratio. However, it is the NAVIEN ACE 24k Turbo model that excels in this parameter better than anyone else. Its cost is truly affordable, and its performance characteristics are surprising. The equipment consumes very little fuel during operation, which will have a positive effect on the family budget, especially in the cold season. And if the slightest malfunction is detected, it can be repaired for relatively little money in one of the service centers.

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.

Advantages and disadvantages of Navien boilers

A careful study of models from different companies allows us to conclude that the Navien gas boiler has many advantages over competitors’ products. Namely:

• good quality at a relatively low price;
• a large number of service centers for their maintenance;
• the company's enterprises have strict quality control mechanisms;
• heat exchangers are made of high-quality stainless steel, which ensures a long service life;
• the presence of an air temperature sensor built into the remote control unit;
• protection against voltage surges in the electrical network;
• very large selection of models;
• inexpensive spare parts.

There are noticeably fewer disadvantages:

1. noises and dull knocks during operation;
2. Only original spare parts are suitable for replacing failed parts.

Customer Reviews

1. Nikolai V. “When choosing a gas boiler for myself, I read a bunch of reviews about these units. I liked the reviews on the Navien gas boiler. Apart from complaints about periodic dull tapping, there is almost nothing about other shortcomings. Well, I decided to take Navien. I’ll say it briefly – I don’t regret it.”
2. Andrey O. “I took Navien Deluxe Coaxial 20k for my dacha. The area of ​​the rooms is about 80 square meters. m, there is enough heat to spare even at minus 25 outside. Now you don’t need to heat the stove or chop wood – it’s beautiful! It makes a little noise, but I hung it in the kitchen - if the door is closed, you can hardly hear it in the bedrooms.”
3. Oleg Kh. “I purchased the Navien Deluxe on the advice of a colleague. The first thing I immediately liked about this boiler was its price. Compared to other companies, the difference is noticeable. Well, of the functions, I am most pleased with the heating mode with temperature control in the rooms. I haven’t noticed any shortcomings yet.”

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.

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.

. and without construction experience

My works for 2022.

How I set up the Navien boiler, pump and blower run-out

First, the question is, why regulate the run-out of the pump and blower, well, probably so that they work less and wear out less, as I noticed, while with the experience of the boiler in winter mode, the blower spins after stopping the boiler for another 1 minute, at this time there is cold air from the street, no longer heating up in the coaxial chimney, it intensively cools the boiler heat exchanger, which is generally detrimental to its health, and unnecessary heat loss into the atmosphere, i.e. it is possible, without damage to the boiler, to reduce the fan run-out time, about this procedure, and at the same time, about the procedure for reducing the pump run-out (relevant in summer mode, when the boiler is turned on only to heat hot water, and turns off again), in more detail and in order

Post-purge control mode (pump and fan run-on)

The procedure for installing stages on the boiler remote control display

1 Turn off the power from the boiler remote control

2 Press the “battery” and “hot water” buttons

buttons battery and hot water

3 The display will show mode P1 for setting the pump run-on in summer mode

mode P1 will be displayed

4 Press the “hot water” button to set the pump run-on in summer mode

Press hot water button

5 Press the + or - buttons, the display will show the numbers 10 or 40, when selecting number 10, the pump run-out will be 5 minutes, when number 40 = 20 minutes, select the option you need

Press the + or - buttons to select the coasting option

6 Press the “hot water” button to exit the pump overrun setting mode

Press hot water button

7 Click the + button

8 The display will show mode F1 to set the blower run-on in summer mode

The display will show F1 mode

9 Press the hot water button to set the blower run-on in summer mode

Press hot water button

10 Press the + or - buttons, the display will show numbers 1 or 2 or 4, when selecting number 1 the blower will run for 30 seconds, when number 2 = 1 minute, when number 4 = 2 minutes, select the option you need

Press the + or - buttons

11 Press the “hot water” button to exit the blower run-on setting mode

Press hot water button

12 Click the + button

13 The display will show mode P2 for setting the pump run-on in winter mode

P2 mode for setting the pump run-on in winter mode

14 Press the “hot water” button to set the pump run-on in winter mode

Press hot water button

15 Press the + or - buttons, the display will show the numbers 10 or 40, when selecting number 10, the pump run-out will be 5 minutes, when number 40 = 20 minutes, select the option you need

Click the + or - button

16 Press the “hot water” button to exit the pump overrun setting in winter mode

Press hot water button

17 Click the + button

18 The display will show mode F2 for setting the fan run-on in winter mode

F2 mode for setting the fan run-on in winter mode

19 Press the “hot water” button to set the fan run-on in winter mode

Press the "hot water" button to set the fan overrun

20 Press the + or - buttons, the display will show numbers 1 or 2 or 4, when selecting number 1, the blower will run for 30 seconds, when number 2 = 1 minute, when number 4 = 2 minutes, select the option you need

Press the + or - buttons

21 When all settings have been made, you must wait 10 seconds, or press the off button on the remote control once

Wait 10 seconds or turn off the boiler from the remote control

That's it, all settings are completed, you can use it

If anything, I have an engineering menu file for download from the Koreans with a crooked translation, but in it everything that I could tell on the pages, well, maybe a little more, there is just a mention that if the boiler remote control fails, then by shorting the remote control wires from the boiler itself, you can turn it on, but it will heat the heating system up to 80 degrees, but at least we won’t freeze until we buy a new remote control, or the repair team arrives with a spare remote control!

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.

Now the gas unit will operate in a new mode.

Navien mounted boiler: characteristics

was in a warmer zone, we immediately realized that this was not suitable for us, at first there were thoughts of moving the remote control downwards, closer to the floor, but, firstly, this is inconvenient for control, secondly, domestic cats could ruin it, thirdly, the boiler could do not turn off, trying to catch up with the temperature below, when it is already hot in the middle part of the room in height.

The room temperature test did not pass and was not suitable for me, at the same time I remembered the person who connected the gas, who advised that the boiler should not be turned on in this mode.

Time passed, but the cycles did not give me peace, and one day it occurred to me, while regularly observing the boiler, that the hysteresis (delta) in the turn-on-switch-off segment of the gas boiler was probably too small, and I would like the boiler to drive the coolant longer to a higher level. low CO temperature, but it was unclear how to do this, I certainly know how to program, but programming languages ​​for this boiler are inappropriate, and I don’t have equipment to connect to the “brains” of the boiler, and one day, purely by chance, I came across one well-known forum for a person who knows how to do this, and with the help of only one remote control, by entering the engineering menu of the Navien boiler!

This is literally what needs to be done. to change the delta between boiler start-stop.

1. With the Navien boiler remote control turned off, press the + and - buttons for 5 seconds

mode setting

2. The number 8 or 9 or 10 will appear on the remote control display (for me)

3. Again, use the + or - buttons to change the value (this is delta) in the range from 2 to 20 (I set it to 12)

4. We wait 5 seconds, after which the boiler remote control goes out

5. Turn off the boiler by removing the plug from the socket for at least 10 seconds

6. Temperature difference value saved

Having done all this, I immediately realized the difference, the intervals between starts and stops of the boiler increased, although it raised the delta by only 2 degrees!, a useful thing, the engineering menu of the Navien boiler!