Gas boilers "Navien". Characteristics, review, reviews

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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

Advantages and disadvantages of Navien Deluxe

Boilers have been sold on the world market for more than 30 years. They have gained popularity due to their reliability and functionality. The high level of safety of gas equipment is ensured by several protection systems:

1. From freezing of the heating system, during prolonged shutdown of equipment in the cold season.
2. From destructive operating modes of the electrical network, during power surges.
3. From low operating conditions of the gas network.
4. From emergency operating conditions of the water supply system, when the coolant pressure decreases to 0.1 bar.

The safety group of the Navien boiler contains primary sensors for temperature and pressure, a control pressure gauge and a safety relief valve against excess pressure in the heating circuit. To protect the internal surfaces of water heating from scale, a filter is installed to purify water from hardness salts.

An SMPS chip is built into the electronic board of the boiler control system, which protects the boiler equipment from fluctuations in the network +/- 30% of the normal voltage of 220V.

Among the minor disadvantages of this brand of heating sources, Russian users include the rather high price, energy dependence and complex installation of a gas boiler, which must be carried out by a specialized organization.

Model "Navien Ace 20k"

These Navien gas boilers are considered quite new, and have three filters in total. In turn, the valves above the pressure gauges are installed of a three-way type. In this regard, the throughput of the device is quite good. In general, many buyers respond positively to the presented gas boiler due to the safety relief valve. Thanks to it, breakdowns occur very rarely.

Additionally, the features of this modification include electrode-type ignition. Today it is considered more reliable. The expansion tank in a gas boiler is installed with a protective layer, so corrosion does not occur. The air vent in the system operates automatically. The supply of natural gas to the secondary heat exchanger is controlled using a special sensor. The model kit includes the following: Navien gas boiler, instructions, and fasteners. It will cost the buyer about 30 thousand rubles on the market.

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.

Review of models of gas boilers for heating Navien

Gas boiler Navien ACE ATMO

Double-circuit boilers of this model were created to operate in unstable conditions, therefore they perform excellently. Gas combustion occurs in an open compartment; therefore, the installation of this boiler requires the presence of a properly equipped chimney with good draft. The boiler will operate even at the lowest gas pressure, this is especially true in winter. This is explained by the fact that in apartment buildings where there are many gas boilers, the gas supply often drops when the temperature outside is below zero.

Also, the Navien mounted gas boiler miraculously copes with changes in water pressure and unstable operation of the electrical network. If a problem is detected, the boiler system will display an error on the screen. Often the issue is resolved immediately; the equipment is able to solve them independently. In addition, boilers of this model are equipped with protection against low temperatures.

Temperature adjustment in Navien double-circuit gas boilers can be carried out in the range of 40°C - 80°C. For heating water, the indicators range from 30°C to 60ºC. The flow of liquid in boilers is carried out under the control of an air sensor, which will immediately release it.

Note.

This model of Navien boilers operates from methane and natural gas. This allows you to fill the boiler with gas if the supply from the centralized system is suspended.

Boiler power varies from 13 kW to 24 kW.

Gas boilers Navien Deluxe Coaxial with turbine

The technical characteristics of these boilers are very similar to the models described above. The SMPS chip allows you to cope with power surges. The Navien gas boiler remote control makes it easier to control and monitor the equipment.

The boilers are equipped with a closed combustion chamber, and therefore the system for supplying air and removing combustion products is fundamentally different. A special turbine is designed directly under a special compartment of the Navien turbo gas boiler. It forces air into the volume that is necessary to maintain a high efficiency of gas combustion.

The pressure sensor detects the value and takes control of the fan speed. Low pressure determines the high speed of its revolutions, without losing the power of the boiler. To release combustion products, there is no need to build a large shaft; a special coaxial pipe will suffice.

Heat exchangers for Navien gas boilers are made from stainless steel with a service life several times longer than copper. They are not susceptible to rust from too hard water.

Note.

The maximum performance of gas boilers in this line is 30 kW.

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.

Basic errors and their elimination

Gas boiler units are equipped with a good diagnostic system, which scans the boiler operating parameters every minute and, if they are violated, issues a coded signal to the operating panel to eliminate the malfunction:

Basic failure codes for Navien gas boilers:

1. E01 - overheating of the coolant in the boiler. Insufficient water circulation through the device; it is necessary to check the operation of the pump, the presence of leaks and blockages in the heat exchanger. If the latter is detected, before eliminating the error, it is recommended to flush the heat exchanger from scale using the technology specified by the manufacturer.
2. E02 - error 02, low coolant pressure in the heating circuit. Check for leaks in heating networks and, if necessary, recharge the circuit.
3. E03 - problems in the boiler electric ignition system. It is necessary to check the presence of power in the system, the presence of pressure and the electrode for the presence of a spark.
4. E04 - no flame in the boiler. Monitoring the piezo igniter for the possibility of generating a spark and checking the grounding system.
5. E05 - the temperature sensor of the return coolant at the inlet to the device does not work. Check the functionality of the primary temperature sensor and, if necessary, replace it with a similar option.
6. E06 - the temperature sensor of the supply coolant at the outlet of the boiler does not work. Check the functionality of the primary temperature sensor and, if necessary, replace it with a similar option.
7. E07/08 - the DHW temperature sensor at the inlet or outlet of the boiler does not work. Check the functionality of the primary temperature sensor and, if necessary, replace it with a similar option.
8. E09 - the centrifugal fan does not work. Check the operation of the inlet air filter for blockages.
9. E10 - error 10, problems in the chimney system, no vacuum in the boiler. Monitor the gas outlet channels for blockages.
10. E13 - error 13, problems in the circulation circuit.

Basic malfunctions and their solutions

Malfunctions of Navien boilers are usually diagnosed independently and displayed on the display with the corresponding code. Based on a signal from one or another sensor, a message about the problem that has arisen is activated.

The most common mistakes are:

• 02. Lack/insufficient amount of water in the system. The issue can be resolved by recharging the system or replacing the flow sensor.
• 03. No flame in the combustion chamber. Indicates problems with the ignition system, or lack of gas.
• 05-06. Open circuit or short circuit of the fresh air sensor.
• 07-08. Open circuit or short circuit of the DHW sensor.
• 09. Fan failure.
• 10. Failure of the smoke removal system.
• 15. Problems with the control board.
• 16. Boiler overheating.

The solution to most problems is to replace the corresponding sensors or components, as well as to clean and remove deposits in the connecting pipelines.

IMPORTANT!

It is not recommended to undertake repairs yourself. This procedure should be entrusted to specialists from the service center or other specialized organization.

Installation and connection

Installation, adjustment and first start-up of any modification of the Navien gas boiler must be carried out by the service department, and the start-up of gas equipment must be carried out by representatives of the city gas company.

However, the owner of heating equipment will need to know the main points of putting the boiler into operation in order to control the progress of installation and construction work.

A gas boiler must not be installed in damp, basement rooms that do not have fresh ventilation. Typically, such wall-mounted units are installed in kitchens, if free space allows, and floor-mounted units are installed in a special furnace room.

Basic rules for the location of a Navien wall-mounted boiler:

1. The boiler is installed on a solid wall made of heat-resistant materials.
2. The gap from the front of the boiler to the opposite wall must be at least 1.0 in order to be able to service the device.
3. The gap from the boiler to any electrical appliance must be at least 0.6 m.
4. The gap between the side surface of the boiler and the walls must be at least 0.2 m.
5. The gap between the floor level and the bottom plane of the boiler must be at least 0.8 m.
6. The unit must have an independent power supply line 220V/50Hz.
7. The boiler body must be grounded.
8. The room in which the gas appliance is installed must have a 3-hour supply ventilation system.

Equipment and operating principle of the Navien Ace boiler

If we consider the wall-mounted atmospheric gas boiler Navien Ace from the technical side, then this model cannot be called simple. This is, in fact, a mini-boiler room, which includes:

• circulation pump;
• automation unit;
• universal separate heat exchanger;
• expansion tank;
• various shut-off valves.

Since most wall-mounted boiler models use a closed combustion chamber, they are equipped with a turbocharger and a coaxial (pipe-in-pipe) chimney.

The power of Navien Ace boilers depends on the model and varies between 7-40 kW. True, there are no special differences in the operating principle of the Navien boiler - it operates according to the classical scheme, which uses a combustion chamber, burner and heat exchanger.
Important! The APS mechanism, on which the double-circuit version of the Navien boiler operates, ensures uninterrupted combustion and gas savings. A fan that controls the rotation speed guarantees safe combustion.