Navien Deluxe S Coaxial 24K, Navien gas wall boiler

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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

Gas boiler Navien Deluxe 24 kW

The South Korean manufacturing concern KyungDong NAVIEN is engaged in the development and production of heating equipment.

The product range includes diesel and gas boilers for floor and wall mounting. Navien Deluxe 24K belongs to the group of double-circuit wall-mounted gas units.

Produces hot water supply and heating of residential or industrial premises with an area of ​​up to 240 m2.

For the unit to operate, it requires a supply of natural or liquefied gas (from the network or in cylinders), a connection to the power supply network and a supply of cold water for heating. In addition, a connection to a pre-installed heating system is required.

The unit supplies it with coolant at a given temperature, and, if necessary, replenishes it to the required volume.

The boiler operation is controlled using a remote control panel, which can be installed in a convenient place.

The built-in circulation pump ensures the movement of coolant through the heating system and the supply of hot water under operating pressure.

User manual

Navien boilers operate automatically and require virtually no human intervention.

The only thing that is required from the owner is to set a comfortable heating temperature . If liquefied gas is used as fuel, it is necessary to ensure timely replacement of cylinders.

Download instructions

You can download the instructions here.

The possibility of long-term operation without specialized service checks is a feature of Navien equipment, which is convenient for users and relieves them of concern about the condition of the unit.

If any malfunctions occur, the corresponding error code appears on the display, the water pressure is shown by a pressure gauge, which allows you to timely detect a leak in the system.

The owner may be required to purchase and install a special filter or water softener, which will extend the life of most boiler components - heat exchanger , pump or three-way valve . If the water supply is from your own well, installing a softener becomes a necessity.

Specifications

Let's look at the technical characteristics of the Navien Deluxe 24K boiler:

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.

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.

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.

Setting up the device yourself

To configure the boiler, set the debugging mode. Then you should adjust the gas pressure limits - minimum and maximum.

It is necessary to bleed air from the circulation pump by unscrewing the plug. This is done after the pressure has built up during the circulation of the heating agent .

The boiler operation is configured using DIP switches.

• You can turn on automatic air removal using DIP switch No. 1, which will start circulation for 2 hours and gradually remove air automatically.
• Turning on switch No. 2 switches the system to maximum power, at which the maximum gas pressure can be adjusted.
• When switch No. 3 is turned on, the boiler is switched to forced operating mode at minimum power, at which the minimum gas pressure is adjusted.

All switching must be performed with the power supply turned off.

IMPORTANT!

Setting up the boiler should be entrusted to specialists from the service center. Doing the work yourself is only possible if there is an urgent need and there is no warranty agreement.

Device

The main components of the Navien Deluxe 24K heating unit include:

• Heat exchangers (main and auxiliary) made of stainless steel for heating water and domestic hot water.
• Expansion tank.
• Gas-burner.
• Circulation pump.
• Fan for combustion boost.
• Three-way and gas valves that allow changing operating modes.
• Boards, sensors, control units, etc.

The principle of operation of the unit is to heat water and coolant using thermal energy from gas combustion.

The heat exchanger ensures separate movement of heating water and hot water without mixing. The three-way valve ensures the specified temperature of the heating agent before entering the system.

The circulation pump gives the necessary impulse to the flow, and the fan provides fresh air to enhance the efficiency of gas combustion.

What's included

The Navien boiler package includes::

• Primary and secondary heat exchangers.
• Expansion tank 8 l.
• Gas heating pad of closed or open type.
• Three-way valve with electric motor.
• Fan for organizing turbocharging.
• Circulation pump.
• A sensor system connected to a control board.
• Built-in voltage stabilizer.
• Remote control.
• Housing with external connecting pipes.

Depending on the model and series, some additional components may be present. Constant development and improvement of the design contributes to the complication of old and the emergence of new elements .

Competitors

Table. Comparison with competitors and analogues Photo ModelRatingPrice

For which rooms is it best suited?

Wall-mounted gas boilers Navien Deluxe 24k are designed for heating residential or public (industrial) premises with an area of ​​up to 240 m2.

They are not used in industrial workshops that have high ceilings and require other heating methods.

These boilers are the most common models for use in cottages and private houses, since they are capable of serving the area of ​​a two-story house or a medium-sized cottage.

PLEASE NOTE! Most users purchase such units for smaller houses, which does not always give the expected effect. Excessive boiler power sometimes creates the undesirable effect of frequent switching on and off of the device, resulting in rapid wear of boiler components and premature failure.

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.

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.

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.